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CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a U.S. national stage of International Application No. PCT/EP2006/008855, filed on 12 Sep. 2006. Priority is claimed on German Application No. 10 2005 048 157.4, filed on 6 Oct. 2005. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention is based on a mobile partitioning wall having wall elements which are displaceably disposed at a running rail. 
     2. Description of the Related Art 
     A mobile partitioning wall with several wall elements, which are displaceably guided in a running rail, is known from DE-OS 24 04 874. Each wall element has a supporting structure, which is formed by a surrounding frame consisting of profiles. Covering panels are mounted to both sides of the frame and, moreover, additional add-on and accessory parts are attached thereto. The hollow space between the covering panels and the frame is filled with thermally insulating and sound-absorbent materials. 
     The frame-based supporting structure results in wall elements having a high weight and requires therefore suspension devices with a correspondingly stable configuration. With such a structure, the increasing requirements with regard to thermal and sound-insulation can only be satisfied when using additional respectively thicker covering panels, while increasing the overall weight. 
     As mobile partitioning walls, due to varying installation situations and dimensions, are individually manufactured, in particular the realization of the frame requires an expensive and precise dimensional manufacturing and connection of profiles. A provision and production of standardized components for such wall elements is feasible to a very limited extent only. 
     Moreover, integrating optional structural elements into such wall elements requires an exact definition of the interfaces to the frame. For example, the usual equipment of the wall elements with sealing mechanisms on the top and bottom sides is expensive and, due to structural circumstances of a frame, restricted with regard to the universal application. Variants in the structure or the installation situation require individual fabrication again. Modifications on-site are only possible within the given tolerance. 
     EP 0 629 752 B1 describes a mobile partitioning wall, in which upper and lower terminal strips are activated by pneumatic lifting members for the purpose of sound insulation and for guaranteeing the stability of the individual wall elements. Complicated manufacturing and limited repair possibilities are caused by the central disposition of the lifting mechanism within the respective wall element and, using said mechanism in a transparent wall, results in a negative appearance. 
     The partitioning wall elements in the Austrian patent specification AT 325262 consist of different materials. In order to achieve a high sound insulation, the gap to a floor guiding rail and the gap to a running rail respectively to the ceiling are closed by a profile being able to move upwards and out of the floor guiding rail. 
     SUMMARY OF THE INVENTION 
     The object of the invention is to provide a mobile partitioning wall with several wall elements displaceably mounted at running rails, the structural units thereof being technically simple to manufacture and to mount, and universally applicable, and being able to be simply and universally disposed at the edge side of individual wall elements. 
     According to the invention, mounting elements are disposed at edge sides of the wall elements, and modular structural units are laterally insertable in the mounting elements. The invention is applicable to both automatically and manually displaceable wall elements of the partitioning walls. 
     The mobile partitioning wall according to the invention has the advantage of substantially simplifying manufacturing and mounting through a modular and uniform structure of the structural units. For this purpose, the individual wall elements of a partitioning wall have a mounting element, in which the structural units, like a modular building system, are disposed to be exchangeable and expandable by means of a uniform mounting and fastening technique, The modular structure allows for a simple assembly of most different functional modules such that, during mounting to the wall elements, it is just required to fasten the structural units and, if necessary, to connect them to the peripheral structural parts. The inventive structure allows for a complete integration of all structural units into the mounting element, such that any intervention in the surface plane of a wall element is avoided and the sound insulating parameters are not modified. 
     The mounting elements are manufactured to have excess length and they are kept in stock, pre-mounting of structural units being possible to a large extent. The mounting elements are shortened to the necessary length during final mounting to the wall elements. As, substantially, the structural units are not located at the ends, shortening is uncomplicated, even in the assembled condition. This results in very few standard elements to be manufactured for the stock, which are adaptable to a multiplicity of dimensions and installation variants. 
     Each functional module has a profiled elongated mounting element into which the individual structural elements are integrated. Opposite guiding grooves, into which the structural elements are uniformly inserted, are formed in the mounting element. For this purpose, the structural elements have one base plate, which is displaceably guided in the grooves, and thus can be flexibly positioned in longitudinal direction. Depending on the configuration, several structural elements can be disposed on one base plate as well. In the event mechanical or electrical connections to the running rail or to adjoining wall elements are required, corresponding flexible and variable connections allow for a simple and subsequent adjustment. 
     In the embodiment as a sealing module, a functional module has a sealing strip, a mechanical lifting mechanism, a drive and a power supply unit, as well as attachments for a carriage. Further optional structural elements are possible. There are many options for the constructional configuration of the structural elements and their cooperation. 
     Advantageously, the sealing module is activated via an electrically driven motor. The motor is likewise disposed in the sealing module, the motor-driven movement being transferred to the sealing strip via several reversing mechanisms. The energy supply and the activation of the motor may be done in the most various ways. Contactless, as well as contact-controlled or line-controlled systems are possible. Systems without wires use energy storage units in the form of accumulators, which need to be temporarily recharged or exchanged. A contact-controlled variant allows for a supply via friction contacts in the running rail of the partitioning wall system. Furthermore, it is possible to supply the sealing modules with power via plug-in connections at the longitudinal edges of the wall elements. In this case, energy from a stationary source is applied exclusively in the event of the final positioning of all wall elements, when all plug-in connections are contacted. In this case, each motor can be supplied directly or with interposed energy storage. 
     For cases of emergency, in particular during power outages, a mechanical actuation of the sealing modules is basically always possible. However, this function may be available as the standard actuation or as an alternative variant as well, such as to create a semi-automatic system. Preferably, the upper and lower sealing modules are then mechanically connected, such as to achieve a synchronous actuation of both sealing strips with one operation. 
     The reversing of the rotational motor movement into a translational lifting and lowering movement for the sealing strip is realized via gear assemblies, preferably via a cable pull or a spindle, which ultimately move the sealing strip. In this case, and depending on the requirement, the sealing strip can be retracted by motor power or projected by motor power. 
     In particular when using a spindle, both the motor and the spindle, as well as a lever connected to the sealing strip, are disposed on a base plate and constitute one mounting unit. The spindle can be used as a compact unit or in conjunction with articulated scissors. The spindle and the motor can be disposed one behind the other or on top of each other. The line disposition reduces the constructional height of the mounting unit. The mechanical connection to the sealing strip is realized by means of the lever. In addition, carrying bolts of the carriage serve as a guidance, these carrying bolts being likewise positioned by means of base plates in the base body of the sealing module. In this case, the sealing strip is retracted as well projected by motor power. 
     In the embodiment with a cable pull, a base plate with the motor and the cable pulley is provided. Furthermore, there are two carrying bolt elements with separate base plates, at which spring tables are elastically supported and additionally coupled to the sealing strip. Cables, exiting on both sides of the cable pulley, are connected to the spring tables and actively retract the pre-tensioned sealing strip upon actuation of the motor. 
     The sealing strip is non-positively fastened to corresponding devices of the lever mechanisms and positively slides in the rail-like mounting element. A friction-reduced guidance is thus achieved during displacement, while reducing the penetration of dirt and the running noise at the same time. Additional sealing rubber lips are disposed at the edges. 
     Oblong holes, through which the carrying bolts of the carriages pass, extend at the upper side of the sealing strips. Disposing the oblong holes the respectively carrying bolts off-center prevents the sealing strip from canting during displacement. The formation of oblong holes also allows for varying the position of the carriages. 
     In addition to the horizontal termination of the wall elements, such sealing mechanisms allow for sealing vertical edges as well, by following the same principle, in particular at terminal wall elements. 
     At the edge, the mounting elements are either disposed to be concealed within a recess in the wall element or they are surface-mounted on the respective edge of the wall element. By disposing the mounting element in a recess, it becomes completely invisible. In the surface-mounted embodiment, the positioning and fastening is realized without forming a recess. Positively cooperating contours between the mounting element and the recess respectively the edge are particularly advantageous, because this achieves an additional anchoring of the mounting elements, in addition to the fastening described hereinafter. 
     Preferably, the fastening of the mounting elements is realized to be integral with the layer forming structure of the wall elements, because, on the one hand, the establishing of a core of the wall element is used to form a recess and, on the other hand, the bonding of the layers is simultaneously utilized for fastening the mounting elements with the result that no separate process steps are necessary. If required, corresponding recesses can be milled into the panel on the site of installation and the mounting elements can be mounted therein, respectively the mounting elements can be surface-mounted and fastened. 
     Preferably, the mounting elements are used in the shape of profiles, thus creating exactly defined and form-stable mounting spaces. The profiles are adapted to the shape of the recess respectively to the shape of the edge and preferably they are formed to be U-shaped or H-shaped. On the inside the profiles have a variety of channels, chambers and bores, in order to be able to position and fasten the different structural elements. Overall, the profiles create a uniform, preferably surrounding mounting area so that modular structural units can be disposed at optional positions. 
     Altogether the manufacturing and mounting expense is substantially reduced, because individual mounting solutions do not need to be provided any more, and mainly system components are used instead. In particular the manual manufacturing steps are substantially reduced, because a major portion is now automatized. The wall element can be shipped likewise as an assembly kit. Final measures of cutting the panel to size, in particular for the add-on parts, and their final mounting can be done on the installation site as well. 
     In order to realize for example a functional outside termination for rooms or for buildings with regard to an acceptable thermal, sound and/or fire insulation at the floor and ceiling areas, sealing modules, which seal towards the running rail respectively towards the floor, are horizontally inserted at the top and bottom of each wall element. Even slight irregularities in the floor can be compensated for by such sealing modules. Projecting and retracting is effected via a mechanism, which is operated via an automatically or manually activated drive unit. Horizontally disposed mounting elements are preferably made from metal, because at this location heavy and in particular load-transferring structural units are disposed. 
     The vertical border areas of each wall element, at least sectionally, are formed as a profile, in order to achieve a positive connection to the border areas of adjoining wall elements. For this purpose, mounting elements are disposed in particular at the vertical edges, wherein sealing profiles or molded parts are mounted, which cooperate with a complementarily formed border area of the adjoining wall element, and provide a soundproof and stable connection. Preferably, vertically disposed mounting elements are made from plastic material, because, on account of the material, a sound decoupling is thus realized. 
     The selection of materials of a wall element and their layering is done in particular in consideration of weight-specific and acoustic aspects, the external layers being selected additionally in consideration of visual and practical aspects. Complicated manufacturing of a supporting frame structure is eliminated, because just the cutting to size and the connecting of the layers is required to provide the basic structure for a wall element. 
     The different materials of the layer are kept as supplies in stock, in panel-shape and are cut to the required dimension when needed. Preferably, dimensioning in a raster measure is advantageous in this case, in order to efficiently realize the different dimensions. Realizing the basic structure of the wall element is done by arranging layered panels and applying adhesives and filling compounds. Thus a variable selection and disposition of layers and filling materials allow for quickly and easily replying to specific customer needs. 
     A wall element according to the inventive structure has a core which, on both sides, is covered by one exterior shell, respectively. Preferably, the exterior shell is multi-layered and consists of an exterior cover layer, a middle layer and an interior layer. Overall, the two exterior shells are formed to be heavy and soundproof and are sonically separated by the preferably soft core material. Through the full connection, preferably bonding, all layers and materials of the wall element are combined to a self-supporting unit. The sound insulation can be realized at a reduced expense, because the selection of appropriate materials and their assembling already result in a considerable improvement. With the intention to improve the rigidity of the wall element, while maintaining the sound insulation at the same time, the contact surfaces of the layers, depending on the material selection, are profiled. 
     Through the selection of most different materials, the use of panel-shaped and foamed layers and their connection to a structure in a sandwich technique, the individual properties are advantageously combined in such a way that they sum up to a considerable improvement. The wall element has considerably higher bending and torsional rigidities, for example, than the sum of the properties when separately using the layers of exterior shell and core. Such composed panels transfer substantial loads as well. The structure of the exterior shell, as well as the thickness and density of the core are decisive factors. Compared to a frame structure, the result is a reduced wall thickness and a lower weight for an increased stability. 
     The core material can have a honeycomb structure, which in particular is formed of paper or aluminum. Alternatively, solid material made from polystyrene foam, PU-foam, mineral wool, rock wool or the like can be used to form the core. 
     Preferably, the exterior shells are multi-layered. Metallic materials, such as sheet steel or sheet aluminium, and furthermore, plastic material (PVC, PC), laminar materials, fibreglass reinforced plastics (GRP), gypsum, wood, cork, etc. are suitable for the middle layer. The layer, disposed on the inside between the middle layer of the exterior shell and the core, serves as an increase to the shell weight and as a damping material and preferably consists of bitumen. This middle layer functions at the same time as a support for the exterior cover layer, which forms the visible surface. The cover layer may be a priming film, a laminate, laminar material or melamine resin. Furthermore, veneers, textile, glass or magnetic surfaces can be used to form the cover layer. 
     Bonding materials and bonding techniques are used for connecting the individual layers of the exterior shell. The so-called long fiber injection method (LFI) is used as a preferred method. In this case, fiberglass strands are cut and, in a single operational step, are fed simultaneously with PUR components to a tool device and blended. The finished mixture is then sprayed between the corresponding layers of the exterior shell and, once hardened, creates a permanent connection. 
     A particularly advantageous structure of the wall element is achieved with a soft core made from PUR-foam or melamine foam, which is enveloped on both sides by a weighting layer of bitumen. Then the middle layer of the exterior shell follows, consisting of GRP enveloped paper honeycombs filled with PU-foam, and an exterior cover layer, depending on customer specifications. Such a combination of materials has excellent acoustic properties and constitutes the optimum solution with regard to the parameters of sound insulation and weight per unit area. 
     Such structured wall elements are suitable to build partitioning walls having the most different configurations. In particular, the substantial weight reduction achieves a lower load on the suspension device and on the drive means and, on the other side, by increasing the sound insulation, the multiplicity of application possibilities has grown. 
     The wall elements can be formed as solid elements, passage door, angle element, window element, compensating element, swing leaf, double-action leaf or as following automatic doors. All wall elements can be moved out of the axis of the partitioning wall and parked at a predetermined location in a space saving manner. Each wall element is displaceable by means of a carriage at one or two points in a running rail attached to the ceiling. 
     The overall partitioning wall fulfils the requirements of the thermal insulation regulation such that, even at low outside temperatures, there are no disadvantages as to energy and thus high cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a diagrammatical structure of a wall element. 
         FIG. 2  shows a perspective view of a spindle drive, 
         FIG. 3  shows a cross-section through a sealing module with spindle drive. 
         FIG. 4  shows a longitudinal section through the sealing module according to  FIG. 3 , in the mounted condition. 
         FIG. 5  shows a perspective view of a sprindle drive according to another embodiment. 
         FIG. 6  shows a cross-section through a sealing module with spindle drive according to  FIG. 5 . 
         FIG. 7  shows a longitudinal section through the sealing module according to  FIG. 5 , in the mounted condition. 
         FIG. 8  shows a perspective view of a base plate with a spindle drive according to another exemplary embodiment. 
         FIG. 9  shows a longitudinal section through a sealing module with a cable pull drive in the mounted condition. 
         FIG. 10  shows a cross-section through the sealing module according to  FIG. 9 . 
         FIG. 11  shows a basic illustration of an energy supply of a wall element. 
         FIG. 12  shows a basic illustration of another energy supply of a wall element. 
         FIG. 13  shows a basic illustration of another energy supply of a wall element. 
         FIG. 14  shows a basic illustration of another energy supply of a wall element. 
         FIG. 15  shows a basic layer structure in cross-section of a panel cut to size for a wall element. 
         FIG. 16 . shows complementarily formed border areas of the adjoining wall elements. 
     
    
    
     In the Figures, similar or similarly functioning structural parts are referenced with identical numerals. 
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     A mobile partitioning wall is composed of several panel-like, independently displaceable, suspendedly supported wall elements  1  and is suitable as a room divider or as an outside termination. Depending on the execution, the individual wall elements  1  may be displaced manually or driven by motor. All wall elements  1  can be moved out of a space-saving parking position, a so-called stacking location, and into the axis of the partitioning wall and be secured there. 
     For the sake of clarity, in all Figures a wall element  1  is diagrammatically and partially illustrated, in order to be able to describe the corresponding structure in a correspondingly detailed form. 
     In the following Figures described below, wall elements  1  are illustrated having respectively one mounting element  9  disposed at each horizontal edge. The mounting element  9  includes respectively one sealing mechanism  10  realizing a functional termination of rooms or buildings with regard to an acceptable thermal, sound and/or fire insulation in the floor and ceiling areas. For sealing purposes, the sealing mechanism  10  is pressed out of the mounting element  9  against the running rail and/or against the floor, wherein, in the inactivated condition, all structural units  12 , which are associated to the mechanical system, are completely concealed in the respective mounting element  9 . Even minor irregularities in the floor can be compensated for through the disposition of these sealing mechanisms  10 . Projecting and retracting the sealing mechanisms  10  is realized via an automatically or manually activated drive unit. At the upper horizontal sides of the wall elements  1 , carriages, which are not illustrated in more detail, are disposed, by means of which the wall elements  1  are displaceable in a running rail fastened to a ceiling of a building. 
     The mounting elements  9  include various structural units  12 , such as coupling elements, lifting members, resetting members, drive elements, suspension devices, floor guides, sealing means and electrical equipment. The structural units  12 , serving for the bracing respectively the sealing the wall element  1 , are completely disposed in the mounting element  9 . The system is thus suitable for use in transparent partitioning walls, because there is no visual interference with its appearance. 
     Further mounting elements  9  are inserted in or surface-mounted on the vertical edges of the wall element  1  or other suitable locations of the wall element  1 . Depending on the intended utilization, the mounting elements  9  then include sealing mechanisms  10 , separate sealing strips, power supply elements, servicing means and further system components. 
     Preferably, the mounting elements  9  are profiled with shapes which provide the exactly defined and form stable mounting spaces. The profiles  9  are adapted to the shape of a recess  11  the shape of the edge and preferably are formed to be U-shaped or H-shaped. On the inside, the profiles  9  have a variety of channels, chambers and bores, in order to be able to position and fasten the different structural units  12 . Overall the profiles  9  create a uniform, preferably surrounding mounting area such that modular structural units  12  can be disposed at optional locations. 
     The modular structure of the sealing mechanisms  10  substantially simplifies the manufacturing and the mounting and is described based on the following Figures. According to the modular building system and by means of a uniform mounting and fastening technique, the sealing mechanism  10  is disposed in the mounting element  9  such as to be exchangeable and expandable. The mounting element  9  is disposed at an upper horizontal edge of a wall element  1  and concealed in a recess  11 , which is machined therein. Fastening the mounting element  9  is done either during manufacturing of the wall element  1  through positive connection or subsequently during a bonding process. 
     The different structural units  12  are laterally inserted into the mounting element  9 , grooves  18  allowing for a flexible positioning in longitudinal direction. The structural units  12  have one base plate  19 , which is displaceably guided in the grooves  18  on both sides and, preferably, is fastened by means of a not-illustrated screw connection. The complete sealing mechanism  10  has a sealing strip  20 , a lifting mechanism  21  and a motor drive  22 , as well as carriage fastenings  23 . 
     According to  FIGS. 2 to 4 , the motor  22 , the lifting mechanism  21 , in the shape of a spindle unit  24 , and a lever  25  as well, which is connected to the sealing strip  20 , are disposed on a common base plate  19  and represent a modular structural unit, whereas the carrying bolts  23  for the carriages have separate base plates  19 , respectively. The motor  22  is located above the base plate  19 , whereas a mechanical spindle unit  24 , which acts upon a lever  25  that is likewise disposed at this base plate  19  and ultimately operates the sealing strip  20 , is disposed below the base plate  19 . In this case, an output shaft of the motor  22  is connected to a shaft of the spindle unit  24  via a toothed belt  26 . 
     The spindle unit  24  consists of the spindle  27 , which is rotatably supported in a screw housing  28 . The screw housing  28  is displaceably fastened at the underside of the base plate  19 , a screw  30 , which holds the screw housing  28 , is passed through an oblong hole  29  of the base plate  19 . A T-shaped lever  25 , which, on the one hand, is connected to the sealing strip  20 , and, on the other hand, to the spindle unit  24 , is rotatably supported at the front side of the base plate  19 . In this case, arms  31  are disposed on both sides of the screw housing  28  on its outside, which arms establish the connection to the lever  25  and, in addition to the horizontal movement, allow for a slight rotary movement. Thereby the other end of the lever  25  is moved vertically and displaces the sealing strip  20  against the running rail. The fastening of the sealing strip  20  at the lever  25  is done via a push-rod  32 , which is rotatably fastened at the lever  25 , the positioning of the sealing strip  20  in the push-rod  32  being adjustable by means of a screw thread. The off-centre disposed carrying bolts  23  of the carriages serve as an additional guiding for the sealing strip  20 . The sealing strip  20  is retracted as well projected by motor power. 
     Another embodiment of a spindle drive  24  is illustrated according to  FIGS. 5 to 7 . In this case again, the motor  22 , the lifting mechanism  21  in the shape of a spindle  27 , as well as a lever  25  connected to the sealing strip  20  are disposed on a common base plate  19  and represent one mounting unit, whereas carrying bolts  23  for the carriages have separate base plates  19 , respectively. The motor  22  and the spindle unit  24  are disposed in one row, one behind the other and gear-connected. Both units are surrounded by a base plate  19 , which is either disposed as a single piece at one of the two units or fastened separately. 
     The spindle unit  24  consists of the spindle  27 , which is rotatably supported in a screw housing  28 . The screw housing  28  is fastened centrally at the base plate  19 . A toggle lever  25 , which, on the one hand, is connected to the sealing strip  20  and, on the other hand, to the spindle  27 , is rotatably supported on the outside of the screw housing  28 . In this case, arms  31  are disposed on both sides of the screw housing  28  on its outside, which arms establish the connection to the lever  25  and, in addition to the horizontal movement, allow for a slight rotary movement. Thereby the other end of the lever  25  is moved vertically and displaces the sealing strip  20  against the running rail. The fastening of the sealing strip  20  at the lever  25  is realized via a push-rod  32 , which is rotatably fastened at the lever  25 , the positioning of the sealing strip  20  being adjustable in the push-rod  32  by means of a screw thread. The off-centre disposed carrying bolts  23  of the carriages serve as an additional guiding for the sealing strip  20 . The sealing strip  20  is retracted as well as projected by motor power. 
     In another embodiment according to  FIG. 8 , a spindle unit  24  is again disposed in one row with the drive motor  22 . The spindle unit  24  consists of articulated scissors  33 , wherein, through displacing the spindle  27 , articulated scissors  33 , which are spring-supported between nuts  34  located respectively at the ends of the spindle  27 , are lifted and lowered. 
     In the embodiment according to  FIGS. 9 and 10 , the lifting mechanism  21  is realized by means of a cable pull  35 . In this case, a base plate  19  with a drive  22  and with a cable pulley  36  is provided. Furthermore, there are two distinct carrying bolt elements  23  each having one base plate  19 . A return pulley  37  is disposed at each of these base plates  19 . In addition, there is a spring supported table  38 , which is coaxially disposed about the carrying bolt  23  and coupled to the sealing strip  20 . An output shaft exiting laterally from the drive  22  is directly coupled to the shaft of the cable pulley  36 . Exiting on both sides of the cable pulley  36 , cables  35  act upon the tables  38  via the return pulleys  37  and thus upon the sealing strip  20 . As, on account of the spring action, the sealing strip  20  is in the projected condition, the cables  35  are wound up when the motor  22  is activated, and thus the sealing strip  20  is retracted through the motor operation. 
     The sealing strip  20  is non-positively fastened to the lever  25  ( FIGS. 2 to 8 ) respectively to the spring tables  38  ( FIGS. 9 and 10 ) and positively slides in the rail-like mounting element  9 . A good guidance is thereby achieved during displacement, while reducing the penetration of dirt and the running noise at the same time. Additional sealing rubber lips  39  are disposed at the upper edges. Slots, through which the carrying bolts  23  of the carriages pass, extend at the ends of the sealing strips  20 . The off-centre disposition of the carrying bolts  23  prevents the sealing strip  20  from canting during displacement. The position of the carriages can be varied through the extra length of the slots. 
     The activation of the sealing module is realized via a drive  22  in the shape of an electrical motor, preferably a direct current motor. The energy supply and control of the motor  22  can be done in most different ways, which will be explained in the following based on  FIGS. 11 to 14 , the functional modules respectively being distinctly or commonly supplied. 
     Contactless as well as contact-controlled respectively line-controlled systems are possible. When using contactless systems, energy storage units  40  in the shape of accumulators are utilized, which can be recharged temporarily or exchanged. The energy respectively data transfer  41  is realized contactless, the energy and the data being transformed and processed in an electrical unit  42 . Such embodiment is illustrated in  FIG. 11 . 
     A contact-controlled variant allows for a supply via friction contacts  43 , which are disposed in the running rail of the partitioning wall system ( FIG. 12 ). 
     Furthermore, it is possible to supply the sealing modules with power via plug-in connections  44  at the longitudinal edges of the wall elements  1 . In this case, exclusively in the event of the final positioning of all wall elements  1 , a contacting through the adjoining wall elements  1  is given, because only in this case there is a connection of the plug-in contacts  44 . In this case, the motor  22  can be supplied directly or with an interposed energy storage unit  40  ( FIG. 13 ,  FIG. 14 ). 
     For cases of emergency, in particular during power outages, a mechanical actuation of the sealing modules is basically always possible. However, this function may be available as the standard actuation or as an alternative variant, such as to create a semi-automatic system. For this purpose, the upper and lower sealing modules are mechanically connected, such as to achieve a synchronous actuation of both sealing strips when manipulating a crank, for example. 
     In addition to the horizontal termination of the wall elements  1  with the sealing strips, obviously the vertical edges, in particular at terminal elements, can be sealed by following the same principle. 
       FIG. 15  illustrates the layered structure of a wall element  1 . In the exemplary embodiment, the wall element  1  consists of a core  2  and exterior shells  3 ,  4  disposed on both sides. This results in a homologous structure. The two exterior shells  3 ,  4  are formed to be heavy and soundproof and are sonically separated by a preferably soft core material. The exterior shells  3 ,  4  and the core  2  are combined through a full bonding, in order to form a self-supporting unit. 
     The core  2  is made from a honeycomb structure, which in particular is formed of aluminum or paper. Alternatively, solid material such as polystyrene foam, PU-foam, mineral wool, rock wool or the like can be used to form the core  2 . 
     Both exterior shells  3 ,  4  are made from several layers and consist respectively on the inside a weighting and sound insulating layer  301 ,  401 , a middle layer  302 ,  402  made from honeycomb material and an exterior cover layer  303 ,  403 . The layers are bonded to each other by means of LFI-injection. 
     Metallic materials, such as sheet steel or sheet aluminium, and furthermore, plastic material (PVC, PC), laminar materials (GRP), gypsum, wood, cork, etc. are suitable for the middle layers  302  and  402 . The layers  302  and  402  function as the support for the visible cover layers  303  and  403 . The cover layers  303  and  403  may consist of priming film, laminate, laminar materials, or melamine resin. Furthermore, veneers, textile or glass can be used to form the cover layers  303  and  403 . 
     A particularly advantageous structure of the wall element  1  is achieved with a soft core made from PUR integral foam or melamine foam. Preferably, the mass amounts to 25 to 75 kg/m 3  with a thickness of 40 to 80 mm. Preferably, the weight per unit area amounts to 10 to 40 kg/m 2 . A weighting layer  301 ,  401  made from bitumen is disposed on both sides and has a-thickness of about 5 to 8 mm and a weight per unit area of about 5 to 15 kg/m 2 . The following middle layer  302 ,  402  is made from GRP enveloped honeycomb paper filled with PU-foam. Finally, the exterior cover layer  303 ,  403 , which is 1 to 4 mm thick, is applied on both sides. Such a combination of materials has excellent acoustic properties and constitutes the optimum solution with regard to the parameters of sound insulation and weight per unit area, such as to reach a sound insulation factor of about 55 dB. 
     As shown in  FIG. 16 , the vertical border areas of each wall element, at least sectionally, are formed as a profile, in order to achieve a positive connection to the border areas of adjoining wall elements. For this purpose, mounting elements are disposed in particular at the vertical edges, wherein sealing profiles or molded parts are mounted, which cooperate with a complementarily formed border area of the adjoining wall element, and provide a soundproof and stable connection.

Summary:
Mobile partitioning wall with several wall elements displaceably suspended in running rails. The mobile partitioning wall have structural units that are technically simple to manufacture and to mount and are structured to be universally usable and can be easily and variably disposed at the edge sides of individual wall elements. The wall elements have mounting elements that are horizontally and/or vertically disposed at the edge sides. Modular structural units are laterally insertable into the mounting elements.