EP3321451B1 - Platform structure made from frame components with a platform roof which can be raised and lowered by a lifting tower - Google Patents

Description

The present invention relates to a stage structure comprising a stage floor, a stage roof covering the stage floor at least in sections, and at least one lifting tower which is immovable relative to the stage floor and rises in a vertical direction therefrom, with which the stage roof can be changed in and in order to change its distance from the stage floor which is to be measured in the vertical direction is relatively movably connected against the height direction, the stage roof having a recess which, starting from a side of the stage roof facing the stage floor, extends vertically into the stage roof and into which the at least one lifting tower projects in the height direction, the stage roof providing the at least one recess comprehensive roof truss formed with the participation of detachably interconnected roof truss poles.

Such a stage structure is known from the prior art in various configurations.

On the one hand stage structures are known which use so-called "trusses" as lifting towers, which are also referred to as "four-point lattice girders". These trusses are prefabricated truss volume components made of metal, with a pitch of mainly between 300 and 1000 mm. The stage roof is also formed in these embodiments by prefabricated truss volume components.

Stage structures which are formed using such trusses are, for example, from the FR 2 810 356 A1 and the US 2014/363219 A1 known.

In the present application, the term “grid dimension” always refers to a side length of a recurring truss element in a floor plan level or a parallel to the floor plan level. Depending on whether one of horizontal elements (in usually horizontal bars or bars) of the truss formed in a parallel to the floor plan, so-called field has only a uniform side length, as is the case with a square field, or different side lengths has, as is the case with a non-square rectangular field, a truss can have more than one grid dimension. This applies to the prior art as well as to the present application.

With the truss elements, lifting towers can be quickly built up in the vertical direction, since a prefabricated and not further disassembled truss element as a truss volume component already forms a height section of the lifting tower and thus only a plurality of truss elements are stacked and fixed in the vertical direction to erect a lifting tower need to be. In addition, the lifting towers formed from truss elements also serve as guide structures for guiding a movement of the stage roof in and against the height direction relative to the lifting towers. An external hoist is usually not necessary, since the known stage structure has a lifting drive that enables the stage roof to be moved along the lifting towers.

A disadvantage of these known stage structures is, on the one hand, the large transport volume of truss elements, since these, as prefabricated volume truss components, take up a much larger volume than the bars forming the truss or the truss components. On the other hand, the known stage structures described have the disadvantage that the use of volume truss components means that their dimensions cannot become arbitrarily large, so that their load-bearing capacity is limited. This in turn leads to a design-related limitation in the size of the stage structure. For example, due to the design-related limited load-bearing capacity of lifting towers formed from truss elements, the stage roof can only have a limited span.

Stage structures are also known which have a truss structure which is formed from truss rods which are detachably and separably connected to one another. The stage floor also includes a half-timbered body, like the roof of the stage has a half-timbered roof, and the side and rear walls of the stage structure have half-timbered walls. These half-timbered bodies of stage roof, stage walls and stage floor can be used due to the use of individual Truss bars instead of prefabricated volume truss components with a greater variety of shapes are erected, the erection itself requiring a higher assembly effort in terms of the number of individual parts to be connected.

Such a stage structure formed from half-timbered bodies has a significantly higher load-bearing capacity than the previously described stage structure with lifting towers made of truss elements and, because of the separability of the half-timber rods, also has a higher packing density when disassembled. However, a stage roof of the latter stage structure cannot be moved upwards away from the stage floor alongside lifting towers, as in the former stage structure, since there is simply a lack of such lifting towers. Rather, with the latter known stage structures, an external hoist, such as a crane, must always be used in order to first form the stage roof with its roof truss structure on the ground and then to place it on the likewise formed upper ends of the side and rear walls of the stage structure and to connect with these.

It is therefore an object of the present invention to further develop a stage structure of the type mentioned in such a way that, with a significantly increased load capacity, compared to the lifting towers formed from truss elements, the stage roof without the provision of external lifting devices, such as cranes and the like, in its desired nominal size - Position can be spent.

This object is achieved according to the invention by a generic stage structure in which the lifting tower is formed at least over a large part of its extent in the vertical direction by a tower truss with releasably and separably connected tower truss rods.

According to the invention, the lifting tower is formed at least over a large part, ie over more than 50%, of its extension in the vertical direction by a tower framework. This means that the lifting tower can be erected quickly and easily. Only at its longitudinal end near the ground can if necessary For anchoring the lifting tower to the floor or to another structure, such as the stage floor, non-truss components are provided.

The same applies additionally or alternatively to the longitudinal end of the lifting tower remote from the ground, which is also referred to below as the "lifting tower head '. The lifting tower head can also be formed from a truss. Furthermore, non-truss components can be provided on the lifting tower head, as is explained in more detail below with supporting components with rope or chain adapters or / and with pulleys.

The term "truss" in the sense of the present application is understood to be abstractly a rod truss in which rod-shaped truss elements are connected at nodes. To make it easier to distinguish between them, truss elements running horizontally in the truss are referred to as "bars", truss elements running vertically in the truss are referred to as "stems" and truss elements running diagonally in the truss are referred to as "diagonals". In general, these are rod-shaped elements. At least some truss elements are preferred, preferably a large part of the truss elements of a truss body or a plurality of truss elements of existing, pre-assembled scaffolding truss systems. A framework is a body formed from such a framework.

The roof truss structure as well as the tower truss structure are orthogonal to the floor plan level and thus orthogonal to the transom members (vertical pedestals) and from the transoms and to the transoms with the involvement of transoms running parallel to a floor plan of the respective truss trending diagonals. Adjacent blocks form floor plan fields in their respective arrangement level. Bars in the vertical direction, which are connected by parallel stems, form elevation fields. The side lengths of rectangular fields, which includes the special case of square fields, are the grid dimension of the respective field.

In an area "tiled" by fields, in which fields follow one another in a subsequent direction, the fields successive in the subsequent direction generally have a uniform, identical grid dimension orthogonal to the following direction, while the grid dimension can vary from field to field in the following direction.

To stiffen the truss structure, several or possibly all of the fields are stiffened with diagonals that extend diagonally through the field. It can also be envisaged to use spatial diagonals which, including an angle with both the bars and the stems, extend between two fields arranged at a distance from one another. In the present application, the term “truss rods” denotes a set of a plurality of bars, stems and diagonals.

Because the tower truss body is formed from releasably and separably connected tower truss rods, the tower truss rods can be transported in the densest possible packing to the erection site of the stage structure. Existing transport capacities can be used efficiently.

So that the roof truss structure can be constructed and erected with the greatest possible freedom of design, the roof truss poles are preferably not only detachable, but also connected to one another. However, it should not be ruled out in principle that prefabricated or pre-assembled truss volume components are also used to form the stage roof, although this is not preferred.

The above-mentioned reference plane is the floor plan of the stage structure or a plane parallel to it, to which the height direction is oriented orthogonally.

With the solution described, a stable and highly loadable lifting tower can be erected, which can not only support a large-span stage roof, but on which the stage roof can be moved vertically relative to the lifting tower can be provided. This means that the stage roof on the lifting tower and along it can be lifted away from the stage floor.

The at least one lifting tower can be designed in accordance with the required load-bearing capacity and can be erected by detachably connecting tower truss rods that are present at first. The only technical requirement is that the cutout in the roof truss is chosen so large that the lifting tower can at least protrude into the cutout or preferably penetrate it.

This can be achieved in a simple and efficient manner in that the cutout is formed by omitting diagonals in floor plan fields lying one above the other in the vertical direction. The floor plan area of a recess field can be further increased by combining two or more smaller floor plan fields into one larger recess field by omitting bars. With regard to the circumscribed area and shape, the recess area is to be chosen larger than the floor plan area of the lifting tower in such a way that the floor plan area of the lifting tower fits completely into the floor plan area of the recess field. The floor plan area of the lifting tower can be formed by only one tower floor plan field or - if the required load capacity of the lifting tower so requires - by a plurality of tower floor plan fields.

In order to ensure that the lifting tower can protrude into the recess, at least some of the tower bolts are preferably shorter than roof bolts used to form the recess.

Furthermore, it can be ensured that the lifting tower can protrude into the recess if an integral multiple of the roof plan grid dimension of the roof plan fields adjoining the recess is larger than an integer in both plan directions orthogonal to one another and spanning the plan plane Multiples of tower floor plan fields in the same floor plan direction. The integer multiple includes the factor "1". The multiples of roof plan fields and tower plan fields can be different multiples as long as only the above condition is met. In addition, the respective multiples of one and the same truss in the two plan directions are different.

Surprisingly, the stage roof on the at least one lifting tower does not have to be guided for movement in and against the height direction, but rather the roof truss body sections enclosing the recess can be orthogonal to the height direction on all sides with play, i. H. be arranged at a distance in the floor plan from the lifting tower. The stage roof can therefore be movable at least during a movement in or against the height direction orthogonal to the height direction relative to the lifting tower. However, the maximum possible movement path parallel to the height direction is many times larger than orthogonal to the height direction.

In addition to the roof truss structure, the stage roof can have non-truss components, such as a roof covering, in order to protect a stage floor area under the stage roof from precipitation or sunlight.

If a low lifting height of the stage roof relative to the stage floor is sufficient in the vertical direction, then it is sufficient if the lifting tower only protrudes into the recess at the beginning of the stage construction and by lifting the platform roof in the vertical direction away from the stage floor, the lifting tower's depth of entry into the recess is reduced ,

According to an advantageous development of the present invention, a significantly greater possible lifting height is provided in that the recess in the stage roof penetrates it in the height direction. Then the lifting tower can also push through the stage roof when erecting the stage structure, so that the constructively possible lifting height of the stage roof relative to the stage floor in the height direction is essentially determined by the structural height of the lifting tower.

With the stage structure described here, the completed stage structure is usually not described. Rather, the stage structure can be a Intermediate product as it temporarily exists during the construction of the final stage structure. This is because the advantages of the stage structure according to the invention are achieved precisely during the erection of the stage structure.

Since the lifting tower is always loaded at least by the weight of the stage roof, it is sufficient for the safe connection of the stage roof and lifting tower at least during the erection phase due to the fact that the weight force is always the same if the connection of the stage roof to the lifting tower only includes connecting elements that transmit tensile force. These connecting means can be chains or preferably ropes. The connecting means that only transmit tensile force are therefore limp and are tensioned by the occurring load capacities. Bend-free, connecting means that only transmit tensile force can advantageously be stored in a space-saving manner. Straight ropes also have a high load capacity based on the rope volume.

In principle, it should not be ruled out that the connecting means are part of manually operated lifting means, for example part of pulley blocks. However, the stage structure preferably has a movement drive in order to drive the stage roof for movement relative to the lifting tower. The motion drive can be an electric motor, in particular a rotating electric motor, or an internal combustion engine. Because of the standstill torque provided, electric motors are preferred as motion drives.

Due to the high load-bearing construction of the stage roof and / or the lifting tower as a half-timbered structure, the motion drive can be mounted on the stage roof and / or on the lifting tower in a particularly space-saving manner.

For the slack connecting means, it is advantageous if the movement drive has a winding roller which can be driven to rotate, in order to provide the connecting means in a space-saving manner. Then, depending on the desired direction of relative movement, the relative movement between the stage roof and the lifting tower can be effected orthogonally to the floor plan level (reference plane) by winding up or unwinding the connecting means. As an alternative or in addition, or the movement drive can Have a chain hoist with a chain that can be driven to move. This has the advantage over a connecting means that can be wound up and unwound that the chain speed in the longitudinal direction of the chain is independent of a winding diameter of a connecting means stored by winding. Thus, a constant chain speed and consequently a constant lifting and lowering speed of the stage roof can be achieved with very simple means, for example by driving a chain drive gearwheel at a constant speed.

The platform roof can be supported on the lifting tower in a particularly simple and effective manner in that the connecting means is fixed on one end to a first connecting means storage and on the other side to a second connecting means bearing on the platform roof, a connecting means section located between the first and the second connecting means storage extending over the lifting tower. The first and / or the second connecting means bearing can be formed on a roof truss rod or a separate bearing element, such as a particularly stiff bearing rod, can be provided for this, for example if the stiffness of the truss rods is not sufficient as the storage location of the connecting means - Truss body is arranged and fixed as a connector bearing.

Since there can also be a relative movement of the connecting means relative to the lifting tower when the stage roof is raised or lowered in the vertical direction, the lifting tower preferably has a deflecting means carrier with at least one deflecting means held thereon, via which the connecting means section between the first and the second connecting means bearings Lanyard is guided.

In principle, it can be considered to provide the motion drive on the lifting tower, from which the flexible connection means is guided to the connection means bearing on the stage roof. Then, for example, both the first and the second connecting means bearings, which are preferably diametrically opposed with respect to the lifting tower, can each have a connecting means guided to a movement drive on the head of the lifting tower.

However, it may be sufficient to use only one motion drive per lifting tower, for example when the winding roller or chain hoist is mounted on the stage roof and forms the first connection means store. The connecting means can then be guided from the winding roller or the chain hoist over the lifting tower to the opposite second connecting means bearing, where it is coupled to a bearing element, for example in a form-fitting manner.

In order to secure the stage roof in a desired position at a distance in the vertical direction from the stage floor and thereby relieve the lifting tower, it can be provided according to an advantageous development of the present invention that the stage roof when it is at a predetermined nominal distance from the stage floor , is connected to the stage floor by at least one side wall and / or rear wall. The side wall and / or the rear wall preferably also comprise a wall truss body, particularly preferably with a grid dimension, which is an integral multiple - including “1” - of the roof grid dimension, so that the at least one side wall and / or the rear wall are simpler Can be connected to the stage roof at the nodes of the roof truss in a suitable manner. For reasons of increased fit to facilitate the connection of the stage roof and at least one wall, the or the wall trusses are also formed with the participation of detachably connected roof truss rods, the roof truss rods of the wall truss body also preferably not only being detachable but separable in order to be able to transport them tightly packed to the place where the stage structure was built.

The stage floor can also include a floor framework body with detachable and preferably singularly interconnected truss rods for the reasons mentioned for a rapid construction of a stable structure and a tight packing that saves as much space as possible for transporting truss rods used for this purpose. The truss poles preferably comprise roof truss poles, so that the stage floor and stage roof can be designed with the same grid dimensions in the two orthogonal plan directions. Besides, it can the connectivity of wall trusses to the stage floor can also be facilitated.

For example, a roof grid dimension can be a grid dimension of 2072 mm. In this case, the tower grid dimension can be a grid dimension of 1710 mm or 1570 mm. These are common grid dimensions in scaffolding, so that the platform structure, including the lifting tower, can be manufactured using known scaffolding components.

Likewise, the grid dimension of the stage floor, stage roof and side and / or rear walls can be 1710 mm. Then the lifting tower can have a grid dimension of 1570 mm.

The stage roof can have more than a nominal distance from the stage floor. For example, a first nominal distance may have a value of slightly more than the average height of a male adult, about 2 m, in order to secure the stage roof above the stage floor for the first time by side and / or rear walls while relieving the lifting tower and at this low first nominal height, attach lighting or / and other functional devices to the stage roof before it is raised further to a second, larger nominal distance, which can be a multiple of the average size of a male adult.

• Bereitstellen eines Bühnenbodens,
• lösbares Verbinden von Dach-Fachwerkstangen zu einem Dach-Fachwerckörper, wobei der Dach-Fachwerkkörper eine Aussparung aufweist, welche ausgehend von einer dem Bühnenboden zugewandten Seite des Bühnendaches in einer Höhenrichtung vom Bühnenboden weg in das Bühnendach hinein verläuft,
• Errichten eines relativ zum Bühnenboden unbeweglichen und in Höhenrichtung von dem Bühnenboden abstehenden Hubturmes am Ort der Aussparung des Dach-Fachwerkskörpers, wobei das Errichten des Hubturmes ein lösbares Verbinden einzelner Turm-Fachwerkstangen zu einem Turm-Fachwerkkörper umfasst, wobei der Turm-Fachwerkkörper sich wenigstens über einen Großteil der Abmessung des Hubturms in Höhenrichtung erstreckt,
• dann, wenn sich der Hubturm in Höhenrichtung in die Aussparung hinein oder durch diese hindurch erstreckt, Verbinden von Dach-Fachwerkkörper und Hubturm derart, dass der Dach-Fachwerkkörper relativ zum Hubturm in Höhenrichtung beweglich ist, und
• Bewegen des Dach-Fachwerkkörpers in Höhenrichtung unter Vergrößerung des Abstandes zwischen Dach-Fachwerkkörper und Bühnenboden.

The above-mentioned object is also achieved by a method for erecting a stage structure, which comprises the following steps:

• Providing a stage floor,
• Detachable connection of roof truss rods to a roof truss body, the roof truss body having a recess which, starting from a side of the stage roof facing the stage floor, extends in a height direction from the stage floor into the stage roof,
• Erection of a lifting tower which is immovable relative to the stage floor and which projects in the vertical direction from the stage floor at the location of the recess in the roof truss body, the erection of the lifting tower being detachable Connecting individual tower truss rods to form a tower truss body, the tower truss body extending at least over a large part of the dimension of the lifting tower in the height direction,
• when the lifting tower extends in the height direction into or through the recess, connecting the roof truss body and lifting tower in such a way that the roof truss body is movable relative to the lifting tower in the height direction, and
• Moving the roof truss in the vertical direction, increasing the distance between the roof truss and the stage floor.

Regarding the advantages of the method, reference is made above to the explanations for the device. It is irrelevant whether the at least one lifting tower is erected in front of or behind the stage roof or whether both are erected at the same time.

As already indicated above, the provision of the stage floor can comprise a detachable connection of truss poles initially present, in particular roof truss poles, to form a floor truss body. The stage floor can include, for example, a floor covering and other functional elements in addition to the floor framework.

As described above, if the distance between the roof truss body and the stage floor corresponds to a predetermined nominal distance, the method can releasably connect truss bars, in particular roof truss bars, to form a wall connecting the roof truss body to the stage floor - Include half-timbered body.

If the lifting tower is no longer needed after the stage structure has been erected because the stage roof has reached its final height position and is secured by side and / or rear walls, the lifting tower can be dismantled if it aesthetically disturbs the overall impression of the stage structure.

If there is talk of at least one lifting tower above, this applies to the very basic principle of the stage structure described here. In order to prevent the stage roof from tipping over during the lifting or lowering along the lifting tower about a tilt axis orthogonal to the height direction, the stage structure preferably has at least during its erection a plurality of lifting towers, for example three or four lifting towers, which are arranged at a distance from one another in the plan view and protrude into a recess in the stage roof in the vertical direction or push it through.

To secure the position of the at least one lifting tower, it is preferably connected to the latter in the area of the stage floor, for example by connecting rods between the floor truss body and the tower truss body.

Figur 1

eine grobschematische Seitenansicht eines erfindungsgemäßen Bühnenaufbaus während seiner Errichtung,

Figur 2

eine grobschematische Seitenansicht des Bühnenaufbaus von Figur 1 nach Abschluss seiner Errichtung,

Figur 3

eine Ansicht des Bühnendaches von unten mit Blickrichtung längs der Höhenrichtung der Hubtürme,

Figur 4

eine Schnittansicht durch den Bühnenboden längs der Schnittebene IV-IV von Figur 1 mit Blickrichtung orthogonal zur Grundrissebene von dem Bühnendach weg,

Figur 5

eine Rückansicht des fertiggestellten Bühnenaufbaus entlang der Blickrichtung V-V von Figur 2 und

Figur 6

eine perspektivische Ansicht eines Hubturmkopfes mit einem Teil des diesen umgebenden Dach-Fachwerkkörpers.

The present invention will be explained in more detail below with reference to the accompanying drawings. It shows:

Figure 1

a rough schematic side view of a stage structure according to the invention during its construction,

Figure 2

a rough schematic side view of the stage structure of Figure 1 after completion of its construction,

Figure 3

a view of the stage roof from below with a view along the vertical direction of the lifting towers,

Figure 4

a sectional view through the stage floor along the section plane IV-IV of Figure 1 looking orthogonally to the floor plan away from the stage roof,

Figure 5

a rear view of the completed stage structure along the viewing direction VV from Figure 2 and

Figure 6

a perspective view of a lifting tower head with a part of the surrounding roof truss body.

In Figure 1 An embodiment of a stage structure according to the invention is generally designated 10. The stage structure is shown in a side view and comprises a stage roof 12, a stage floor 14 and a total of four lifting towers, of which in Figure 1 a front lifting tower 16 only closer to the audience and a rear lifting tower 18 further away from the audience are shown.

The lifting towers 16 and 18 are preferably of identical construction, which is why only the front lifting tower 16 is described below as representative of all lifting towers of the stage structure 10 according to the invention.

The stage roof 12 comprises a roof truss body 20, which is formed from a plurality of vertical posts 22, a plurality of horizontal bars 24 and a plurality of diagonals 26, which stiffen roof elevation fields 27 formed by posts 22 and bars 24. Not all roof elevation fields 27 of the roof truss body 20 are stiffened with diagonals 26.

Furthermore, vertical stems 22 of different lengths can be used in the stage roof 12 in order to achieve the in Figure 1 to form inclined roof surfaces 12a and 12b.

The stage roof 12 is also covered with roof panels or tarpaulins 28, which are anchored to the roof truss body 20 in order to form a rainproof roof skin.

The stage roof 12 and thus also the roof truss body 20 have recesses 30 and 32, which run from a side 12c of the stage roof 12 facing the stage floor 14 in the height direction H into the stage roof 12 and, in the example shown, completely penetrate the stage roof 12 , The lifting tower 16 projects into the recess 30 in the height direction H, and the lifting tower 18 projects into the recess 32.

Figure 1 shows the stage roof 12 already in a raised position in a predetermined nominal distance position. Originally, the stage roof 12 was mounted on the surface 14a of the floor covering 34 of the stage floor 14 around the previously erected lifting towers 16 and 18 and then raised in the height direction H relative to the lifting towers 16 and 18 without an external lifting device. For this purpose, the stage roof 12 is movably connected to the lifting towers 16 and 18 by ropes 37 and 39 in and against the height direction H relative to the lifting towers 16 and 18. The connection of the lifting towers 16 and 18 to the stage roof 12 is shown below in connection with Figure 6 are explained in more detail.

The stems 22, bars 24 and diagonals 26 of the stage roof 12, which can have different lengths depending on the desired roof shape, form a group of roof truss rods to form the roof truss body 20. The roof truss rods 22, 24 and 26 are detachable and can be separated and can be completely separated when dismantling the stage roof and can be transported tightly packed after being separated.

The lifting towers 16 and 18 also have vertical supports 36 which are connected to one another by horizontal bars 38 to form rectangular tower elevation fields 40, the rectangular tower elevation fields 40 being stiffened by diagonals 42.

The stems 36, bolts 38 and diagonals 42 form tower truss rods, which are detachably and separably connected to form a tower truss body 44. The lifting towers 16 and 18 can therefore also be dismantled essentially by separating the tower truss rods 36, 38 and 42 and the individual parts can be transported in and out in a tight packing with efficient use of the transport space.

The vertical tower posts 36 can also have different lengths, for example in order to form a lifting tower head 46 or possibly also a lifting tower base 48 with a different height dimension compared to the intermediate tower elevation fields 40, if this should be necessary or desired.

In the example shown, the lifting towers 16 and 18 have a square tower floor plan field 50 and thus a square base area (see for example Figures 3 and 4 ). The tower floor plan field 50 is formed by horizontal bars 38 connected to a square.

A plurality of, in the present example four, tower elevation fields 40 of the same height can be arranged between the lifting tower base 48, which forms a longitudinal end of the lifting tower 16 closer to the ground, and the lifting tower head 46, which forms a longitudinal end of the lifting tower 16 which is remote from the ground.

The horizontal bars 38 of the lifting towers 16 and 18 are chosen with regard to their length such that their longitudinal dimension is smaller than the corresponding length dimension of the cutouts 30 and 32, respectively. This ensures that the lifting towers 36 and 38 have the cutouts 30 and 32 assigned to them can enforce with horizontal play or can protrude into it, so that a relative mobility of the stage roof 12 in and against the height direction H relative to the lifting towers 16 and 18 is ensured.

The stage floor 14 also includes a floor truss 54 with vertical posts 56, horizontal bars 58 and diagonals 60 as floor truss bars.

In the example shown, the lifting towers 16 and 18 also penetrate the stage floor 14, since the grid dimension of the floor truss 54 in the region of the lifting towers 16 and 18 is greater than the grid dimension of the lifting towers 16 and 18. Thus, the lifting towers 16 and 18 can play with all sides in the floor plan fields 62 formed by the horizontal bars 58 (see Figure 4 ) can be set. The lifting towers 16 and 18 are preferred for better securing their position in the area of enforcement of the floor truss body 54 with its vertical posts 56 by connecting struts 64 (see Figure 4 ) connected. The connecting struts 64 extend between each individual vertical support 36 of the lifting towers 16 and 18 and the closest vertical support 56 of the floor truss body 54.

In Figure 2 is the situation of Figure 1 shown in the same side view with further construction progress in the construction of the stage structure 10. A side wall 66 and a rear wall 68 have now been erected between the stage roof 12 and the stage floor 14, both in turn as side-wall truss 70 and rear-wall truss 72. Through the walls 66 and 68, on which the stage roof 12 rests, the lifting cables can 37 and 39 and with these the lifting towers 16 and 18 are relieved of the load of the stage roof 12. The roof tarpaulin 28 are in Figure 2 to form a completely closed roof skin also laid over the recesses 30 and 32.

The wall trusses 70 and 72 are also constructed in a manner known per se by means of vertical stems, horizontal bars and diagonals which are detachably and separably connected to one another and can be assembled and disassembled in a short time. The wall truss 70 and 72 as well as the roof truss 20, the tower truss 44 and the floor truss 54 are formed in a manner known per se in framework construction technology by truss poles in the mentioned form of vertical posts, horizontal bars and diagonals.

In Figure 3 is a view of the side 12c near the stage floor of the stage roof 12 with lifting towers 16 and 18 projecting into the recesses 30 and 32. The further structure of the stage roof 12 lying behind the surface 12c, in particular the roof skin 28 and its supporting structure, is not shown. The only sections of the stage structure 10 which are located behind the plane of the side 12c near the stage floor and are nevertheless shown are the lifting tower heads 46 of the lifting towers 16 and 18.

As in Figure 3 In addition to the already mentioned lifting towers 16 and 18, there are two further lifting towers 17 and 19, of which the lifting tower 17 is closer to the audience watching the spectacle on stage and the lifting tower 19 is further away from the audience. These lifting towers 17 and 19 are also identical in construction to the lifting towers 16 and 18, so that the description of the lifting tower 16 can also be applied to the lifting towers 17 and 19. The lifting towers 17 and 19 thus create 10 recesses in the stage roof 12 during the construction phase of the stage construction.

The stage roof 12 is suspended during lifting and lowering along the lifting towers 16, 17, 18 and 19 only by the lifting ropes 37 and 39 and further lifting ropes on the lifting towers 17 and 19 on the lifting towers 17 to 19, but does not lead to the exact lifting movement. The stage roof 12 hangs with horizontal play on the respective lifting towers 17 to 19 and is within the scope of the horizontal play, i. H. horizontally within the framework of the recesses 30 and 32 between the lift tower sides and the sides of the recesses penetrated by the lift towers, d. H. orthogonal to the height direction H, movable on all sides.

How Figure 3 shows, horizontal bars 24 of different lengths can be used to form the roof truss body 20, so that the fields formed on the roof truss body 20, more precisely on the side 12c facing the stage floor 14, can have different sizes and dimensions depending on the location.

In Figure 4 a section through the stage floor 14 is shown, which shows the fields of the floor truss 54 formed parallel to the floor plan.

In order to create a center of gravity of the stage arrangement 10 which is as low as possible, ballast elements (not shown) can be accommodated in the floor truss 54, for example made of concrete, in order to secure the stage structure 10 against the effects of wind loads and against dynamic loads of any performances on the stage. In Figure 4 can be seen the rear wall 68, which is formed with a smaller wall thickness than the side walls 66. On the side of the side surfaces 66 facing away from the stage floor 14a, an auxiliary support structure 76 is formed in the form of a truss, which extends from the contact surface of the stage floor 14 or of the stage structure 10 in the height direction H extends to about half the height of the stage structure 10. This auxiliary support structure 76 gives the stage structure 10 further rigidity.

In Figure 5 is the stage structure 10 from behind, ie in the direction of arrow V, in Figure 2 shown. One looks at the wall truss 72 of the rear wall 68 on which the stage roof 12 rests. The lifting towers and parts of the stage structure located behind the viewing level are shown in the illustration by Figure 5 not shown.

The rear wall 68 and its wall truss 72 are formed by vertical stems, horizontal bars and diagonals in a manner known per se by releasable connections. The rear wall 68, the side walls 66 and the auxiliary support structures 76 can be provided with wall claddings on their outside and / or inside.

In Figure 6 the area of the lifting tower head 46 of the lifting tower 16 protruding into the recess 30 is shown as it is surrounded by parts of the roof truss body 20.

As already described above, the recess 30 is enclosed by horizontal bars 24 and vertical posts 22 of the roof truss body 20. Likewise, the lifting tower head 46 as the longitudinal end of the lifting tower 16 and the tower truss body 44 is formed by vertical posts 36 and by horizontal bars 38. The horizontal bars 38 are arranged at the outermost longitudinal end of the lifting tower head 46 only in the depth direction T, but not in the width direction B of the stage structure 10. In the width direction B, the two horizontal bars 38 are connected to one another by two profiled beams 78, which span the distance between the two highest horizontal bars 38 approximately in the longitudinal center thereof. At the longitudinal ends of the profile rods 78, here: U-profile rods 78, 78 deflection rollers 80 are arranged between the profile rods, which deflects the hoisting rope 37 between its two bearings. The two bearings of the lifting cable 37 are each provided on a pull rod 82 and 84, respectively. The tension rods 82 and 84 connect horizontal bars 24 to one another in the depth direction and therefore act like horizontal bars.

The pull rod 82 is closer to the center of the stage than the pull rod 84. For example, a drive motor 86 with a winding roller 88 connected to its output shaft for common rotation can be arranged on the pull rod 82 his. The winding roller 88 forms a first bearing for the lifting rope 37. Starting from the winding roller 88, the lifting rope 37 is guided around the two deflecting rollers 80 on the profile carriers 78 and positively fixed at the longitudinal center of the pull rod 84. By operating the drive motor and thereby winding and unwinding the lifting cable 37 onto the winding roller 88 or from it, a lifting and lowering movement of the stage roof 12 in and against the height direction relative to the lifting towers 16 to 19 can be effected. A drive motor 86 with a winding roller 88 is preferably provided in the area of each recess of a lifting tower 16 to 19 and is operationally synchronized with one another in order to enable lifting of the stage roof 12 with an orientation parallel to the stage floor 14.

When the stage roof 12 is raised from the stage floor 14, the winding roller 88 can be mechanically secured against rotation in the unwinding direction by means of a latch, so that rotation of the winding roller is then only possible in one direction of rotation, namely in the direction of winding. To lower the stage roof, the detent pawl can be brought into the disengaged position by an actuator, such as a motor or electromagnet, so that a movement of the winding roller 88 is then also possible in the direction of unwinding.

In the present exemplary embodiment, ropes (ropes 37 and 39), which are unwound from a winding roller (winding roller 88) or wound onto it, are shown as connecting means which transmit tensile force. In order to enable the stage roof to move at a constant speed along the vertical direction, the drive motor can be provided with a drive control which takes into account the changing winding diameter during winding and unwinding operations and accordingly regulates the speed of the drive motor to a substantially constant rope speed.

Alternatively, at least one chain hoist per lifting tower can be provided as a connecting means between the lifting tower and the stage roof. The chain hoist can be driven in a simple manner at constant speed and consequently with simple and inexpensive drive motor control in order to achieve the preferred substantially constant chain speed and thus the preferred substantially constant speed To maintain the lifting and lowering speed of the stage roof relative to the lifting tower.

Due to the proposed stage structure, a stage structure with a stage roof of almost any size can be erected and dismantled without additional external lifting equipment, such as cranes and the like. During the operation of the stage structure as a stage, the hoists of the stage structure 10, that is to say in the example shown the drive motors 86 with the winding rollers 88, are relieved of carrying tasks, since the stage roof, when fully raised, rests on the side walls 66 and on the rear wall 68.

Claims (15)

1. A stage structure (10), encompassing: a stage floor (14); a stage roof (12) that covers the stage floor (14) at least in portions; and at least one lifting tower (16, 17, 18, 19) which is immovable relative to the stage floor (14) and projects therefrom in a vertical direction (H) and to which the stage roof (12) is connected, relatively movably in and oppositely to the vertical direction, for modification of its distance, to be measured in a vertical direction (H), from the stage floor (14); the stage roof (12) comprising a cutout (30, 32) which extends, proceeding from a side (12c) of the stage roof (12) facing toward the stage floor (14), into the stage roof (12) in a vertical direction (H) and into which the at least one lifting tower (16, 17, 18, 19) projects in a vertical direction (H); the stage roof (12) comprising a roof framework body (20) that surrounds the at least one cutout (30, 32) and is constituted with the participation of roof framework rods (22, 24, 26) connected releasably to one another,
   characterized in that the lifting tower (16, 17, 18, 19) is constituted, at least over a large part of its extent in a vertical direction (H), by a tower framework body (44) having tower framework rods (36, 38, 42) that are releasably and separably connected to one another.
2. The stage structure according to Claim 1,
   characterized in that the cutout (30, 32) passes through the stage roof (12) in a vertical direction (H).
3. The stage structure according to Claim 1 or 2,
   characterized in that the lifting tower (16, 17, 18, 19) projects into the cutout (30, 32) with a clearance on all sides in a direction orthogonal to the vertical direction (H), in particular passes through the cutout (30, 32).
4. The stage structure according to one of the preceding claims,
   characterized in that the connection of the stage roof (12) to the lifting tower (16, 17, 18, 19) encompasses exclusively tensile-force-transferring connecting means (37, 39).
5. The stage structure according to one of the preceding claims,
   characterized in that wherein the stage structure, in particular the stage roof (12) and/or the lifting tower (16, 17, 18, 19), comprises a motion drive system (86, 88) that is embodied to drive the stage roof (12) to move relative to the lifting tower (16, 17, 18, 19).
6. The stage structure according to Claims 4 and 5,
   characterized in that the motion drive system (86, 88) comprises a winding roller (88) drivable to rotate, or a chain hoist having a chain drivable to move.
7. The stage structure according to one of the preceding claims,
   characterized in that a connecting means (37, 39) is secured at one end on a first connecting means mount (88) and at the other end on a second connecting means mount (84) on the stage roof (12), a connecting means portion located between the first (88) and the second connecting means mount (84) extending over the lifting tower (16, 17, 18, 19).
8. The stage structure according to Claim 7,
   characterized in that the lifting tower (16, 17, 18, 19) comprises a reversing means carrier (78) having at least one reversing means (80) retained thereon, over which that connecting means portion of the connecting means (37, 39) which is located between the first (88) and the second connecting means mount (84) is guided.
9. The stage structure according to Claim 7 or 8, including Claim 6,
   characterized in that the winding roller (88) and/or the chain hoist is mounted on the stage roof (12) and constitutes the first connecting means mount (88).
10. The stage structure according to one of the preceding claims,
    characterized in that the stage roof (12), when it is at a predetermined nominal distance from the stage floor (14), is connected by way of at least one side wall (66) and/or back wall (68) to the stage floor (14), the at least one side wall (66) and/or the back wall (68) preferably encompassing a wall framework body (70, 72) having framework rods, in particular roof framework rods (22, 24, 26), connected releasably to one another.
11. The stage structure according to one of the preceding claims,
    characterized in that the stage floor (14) encompasses a floor framework body (54) having framework rods (56, 58, 60), in particular roof framework rods (22, 24, 26), that are connected releasably to one another.
12. A method for erecting a stage structure, encompassing the following steps:

    - furnishing a stage floor (14);

    - releasably connecting roof framework rods (22, 24, 26) to yield a roof framework body (20), the roof framework body (20) comprising a cutout (30, 32) that extends, proceeding from a side (12c) of the stage roof (12) facing toward the stage floor (14), into the stage roof (12) away from the stage floor (14) in a vertical direction (H).

    - erecting, at the location of the cutout (30, 32) of the roof framework body (20), a lifting tower (16, 17, 18, 19) that is immovable relative to the stage floor (14) and protrudes from the stage floor (14) in a vertical direction (H); erection of the lifting tower (16, 17, 18, 19) encompassing a releasable connection of individual tower framework rods (36, 38, 42) to yield a tower framework body (44), the tower framework body (44) extending over at least a large part of the dimension of the lifting tower (16, 17, 18, 19) in a vertical direction (H);

    - when the lifting tower (16, 17, 18, 19) extends in a vertical direction (H) into or through the cutout (30, 32), connecting the roof framework body (20) and lifting tower (16, 17, 18, 19) in such a way that the roof framework body (20) is movable in a vertical direction (H) relative to the lifting tower (16, 17, 18, 19); and

    - moving the roof framework body (20) in a vertical direction (H), accompanied by enlargement of the distance between the roof framework body (20) and the stage floor (14),
13. The method according to Claim 12,
    characterized in that the furnishing of the stage floor (14) encompasses a releasable connecting of framework rods (56, 58, 60), in particular roof framework rods (22, 24, 26), to yield a floor framework body (54).
14. The method according to Claim 12 or 13,
    characterized in that when the distance between the roof framework body (20) and the stage floor (14) corresponds to a predetermined nominal distance, framework rods, in particular roof framework rods (22, 24, 26), are releasably connected in order to form a wall framework body (70, 72) that connects the roof framework body (20) to the stage floor (14).
15. The method according to Claim 14,
    characterized in that it encompasses, after production of the wall framework body (70, 72) to connect the roof framework body (20) to the floor framework body (54), a disassembly of the lifting tower (16, 17, 18, 19).

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