EP3247846B1 - Multi-step stand segment and method for assembly therefore - Google Patents

Description

TECHNICAL AREA

The invention relates to a multi-stage grandstand segment, a grandstand comprising a plurality of such grandstand segments and a method for assembling such a grandstand segment according to the preambles of the independent claims.

STATE OF THE ART

Tribunes are often temporary structures that are built for a single occasion and then dismantled again.

It is of paramount importance that such grandstand constructions are absolutely reliable under all conceivable operating conditions and that they can be assembled and dismantled in the shortest possible time with as few assembly personnel as possible (often recruited locally). Also, the individual components from which such bleachers are created should be as compact as possible to store and have the lowest possible weight.

Out GB 2 433 078 A is known a grandstand system in which the grandstand consists of a plurality of two-stage grandstand segments. These tribune segments are each formed of two lateral truss girders, which are connected to each other via attached height adjustable adapter pieces and hinged to the front of these adapters crossmember. In this case, in addition to adjusting the height of the adapter pieces to the truss girders the suspension height of the cross member can be selected on the adapter pieces.

Although this known grandstand system offers a great deal of flexibility in terms of the height of the grandstand stages, which is desirable in some cases, however the disadvantage that the connection between the lateral truss girders and the cross members on the adapter pieces is structurally suboptimal and that due to the variety of configuration options, the risk of assembly errors inexperienced assembly staff is large.

DE 18 05 755 A1 discloses a multi-stage tribune segment formed from disassembled interconnected stage carriers, cross members and floor panels, wherein the cross member for establishing the connection with the stage carriers with arranged at their ends T-shaped profile heads are retracted from above into corresponding receiving profile contours on the side of the stage carrier.

FR 2 295 190 A1 discloses a multi-stage tribune segment formed from disassembled interconnected stage carriers, cross members and floor panels, the cross members are retracted for establishing the connection with the stage carriers with arranged on their backs hook elements from the front into corresponding receiving openings on the front side of the stage carrier.

EP 2 557 255 A2 discloses a multi-stage tribune segment formed from disassembled interconnected stage carriers, cross members and floor panels, wherein the cross member for establishing the connection with the stage carriers each with arranged at their ends, rearwardly facing tabs with receiving openings by horizontal retraction from the front via associated mounting projections on the side surfaces of the Stage carriers are positioned. Then, the fastening projections are brought to the stage carriers by vertically lowering the respective cross member with the receiving openings of the tabs engaged.

US 2002/078633 A1 discloses a multistage bleacher segment formed of demountably interconnected stage beams, cross members and floor panels, wherein the cross member for establishing the connection with the stage carriers with arranged at their ends hooks and tabs are retracted from above into corresponding receiving contours on the side of the stage carrier.

PRESENTATION OF THE INVENTION

It has as its object to provide a grandstand system available which does not have the aforementioned disadvantages of the prior art or at least partially avoids.

This object is solved by the subject matters of the independent claims.

According to these, a first aspect of the invention relates to a grandstand segment forming several grandstand stages, which is constructed of dismountably interconnected structural elements. These structural elements comprise two side by side with a spaced-apart stage carrier, a plurality of cross members which connect the stage carrier together and form the front sides of the grandstand stages, and bottom plates which span the areas formed between the stage carriers and the cross members and form the tops of the grandstand stages.

The cross members border laterally with their ends on the step carrier. In this case, the step supports and the cross members each penetrate in this adjoining region in such a way that there is a positive connection between them at least in the direction of gravity and in all horizontal directions. Advantageously, this compound is also positively in all directions transverse to the longitudinal extension of the cross member, ie also in the vertical direction against the direction of gravity.

In this case, the cross member and the step carrier are designed such that the respective connection between these during assembly of the bleachers segment by retracting projections formed on the cross beams in formed on the stage carriers recordings for these projections can be produced, and in the dismantling of the bleachers segment by extending the projections in the opposite direction from the recordings can be canceled again. This makes it possible to provide a grandstand system with simple and safe to install and thereby structurally very stable grandstand segments available.

The cross member and the step carrier are designed such that the connection between them during assembly of the bleachers segment by retracting the projections in a direction transverse to the longitudinal extent of the cross member can be made in the recordings. This results in the advantage that solutions are possible in which the step carrier can be arranged at the installation in their final assembly position and can be connected without further change in position with the cross members to the support structure of the inventive bleachers segment.

In this case, the cross member each penetrate laterally into the step carrier with a plurality of projections formed at their ends, to form the aforementioned positive connection between the cross member and the stage carriers.

Since the projections which serve to form the connection, are formed exclusively at the ends of the cross member, it is possible to form the sides of the step carrier flat and without projections, which has an advantageous effect on their stackability. In addition, it is easier and less expensive, cross members, which are advantageously formed of aluminum profiles to equip at their end with claims according to projections in the form of stable and low-wear mounting pins, as to provide them with stable and secure shots for formed on the stage supports mounting pin.

At least two, preferably exactly two claimed projections are present at the ends of the cross member, which are spaced apart in a direction transverse to the longitudinal direction of the respective cross member. In this way, in particular for the preferred case that each of these projections causes a positive connection between the cross member and the step carrier in the longitudinal direction of the cross member away from the respective stage carrier, a great stability and in particular a high angular stiffness of the connections between the cross members and the stage carriers in a simple and cost-effective manner can be achieved.

In this case, the cross member and the step carrier are designed such that for the preparation of the connections between the cross members and the stage carriers in the assembly of the bleachers segment retraction of a first of the at least two projections completely or at least partially in the assigned this recording of each stage carrier before retraction of a second of the at least two projections must be made in the associated this recording of each stage carrier. As a result, solutions are possible which ensure a particularly safe and simple installation, e.g. in that the cross members are brought into a defined position with respect to the stage carriers by retracting the aforementioned first projections into associated receptacles on the stage carriers and then being rotated or pivoted into a position, guided by the first projections arranged in the receptacles, starting from which then the aforementioned second projections are retracted in the associated receptacles.

In a first variant of the bleacher segment according to the invention, the cross members and the stepped supports are designed in such a way that the retraction of the first protrusions into the receptacles associated therewith takes place from the upper side of the stepped supports before retraction the second projections must take place in the images associated with these from the front of the stage carrier forth.

In a second variant of the tribune segment according to the invention, the cross members and the step carriers are designed such that the retraction of the first projections into the receptacles associated with them is effected from the front of the stage carriers prior to retraction of the second projections into the receptacles associated therewith from the upper side of the stage carriers must be done.

The fact that the cross member and the step carrier are formed so that the retraction of the projections of the cross member in the associated receptacles of the stage carrier from the top and from the front of the stage carrier forth, there is the advantage that a particularly safe and effort saving assembly of Tribune segment is possible, since the cross member (in a suitable embodiment of the step carrier) can be pushed during assembly with their ends resting on the stage supports to their mounting position on the stage carriers and can then be attached thereto.

In this case, it is preferred in the second variant that the at least two projections comprise an uppermost projection and a lowermost projection, and the cross members and the stepped supports are designed such that the retraction of the lowermost projection into the receptacle associated therewith projects from the front side of the step carrier the retraction of the uppermost projection in the recording associated with this must take place from the top of the step carrier ago. Such an embodiment has proven to be particularly easy to install.

In a further preferred embodiment of the tribune segment according to the invention, the cross members and the step supports are designed such that the cross members must be rotated or pivoted relative to the stage carriers in each case about an axis extending parallel to their longitudinal axis during assembly for retraction of the projections and at the disassembly for extending the projections from the recordings must be turned back accordingly or pivoted back. Such embodiments offer the advantage that it is relatively easy to secure the connections between the cross members and the step supports against a release of the connection by extending the projections from the receptacles by securing the cross members against rotation.

The connections between the cross members and the step supports are preferably each secured by the bottom plates against lifting of the connection by extending the projections from the recordings. In this way, it becomes mandatory for a properly operational bleachers a backup of these compounds.

The bottom plates of the tribune segment are preferably each at its boundary edges, which adjoins the respective end face of the overlying tribune stage forming cross member, positively secured by this cross member against lifting and / or supported by this.

For this purpose, it is advantageous that the floor panels are each inserted at a slot on the front side of this cross member at that of its boundary edges, which adjoins the respective end face of the overlying tribune stage forming cross member. In this way, the safety against lifting and the support function can be realized in a simple and secure manner.

It is further preferred that the lower boundary of the groove, from which the respective bottom plate is supported, is substantially flush with bearing surfaces formed on the stage carriers for the side regions of the respective bottom plate. This results in an improved stability of the grandstand stage and it is possible, the base plates during assembly each with that of their boundary edges ahead, which is provided for adjoining the respective end face of the overlying tribune stage forming cross member, resting on the bearing surfaces formed on the stage carriers towards the crossbeam. In this way, we particularly safe and effort-saving installation possible, especially when the bearing surfaces formed on the stage carriers each side of guide elements, such as guide ribs are limited, which is preferred, so that the respective base plate when placed on these support surfaces and during insertion is guided laterally into the groove of the cross member.

Advantageously, the floor panels are each supported in the region of their adjoining the cross member, which forms the end face of the step formed with them, by this cross member. This results in a particularly stable and safe construction.

Further, it is advantageous that the bottom plates are each secured in the region of their adjoining the cross member, which forms the end face of the step formed with them, by this cross member positively against lifting.

This is done with advantage in such a way that the bottom plates engage in each case in the region of their adjacency to this cross member with a profile contour extending along this boundary in an undercut on the cross member, creating a positive connection with this cross member against lifting the bottom plate in this area. Here, the bottom plates and the cross member are preferably each formed such that, in the absence or repeal of any safety devices, the respective bottom plate to cancel the positive connection can be moved in their plate plane such that the engagement of the profile contour of the bottom plate in the undercut of the cross member repealed becomes. Such solutions have proven to be particularly easy to install.

It is further preferred that the floor panels by functional components of the tribune, preferably by components of the Tribünenbestuhlung, positively against displacement, which would lead to a lifting of the positive connection against lifting, are secured. This results in ready for use tribune automatically securing the floor panels.

In general, it is preferred that the connections between the stage carriers and the cross members are tool-less producible and can be canceled without tools, and in particular that for the production of these compounds no additional components, such as Screws or safety bolts required. In this way, no tools or parts can be forgotten or lost and the assembly, which often takes place under difficult conditions in several meters height, is greatly facilitated.

A second aspect of the invention relates to a grandstand comprising a plurality of grandstand segments according to the first aspect of the invention. Side-by-side tribune segments have common step elements. The formation of such stands represents the intended use of the tribune segments according to the first aspect of the invention.

A third aspect of the invention relates to a method for assembling a bleacher segment according to the first aspect of the invention. In this case, two stage carriers are arranged at a distance from one another and connected by means of a plurality of cross members to a common support structure by projections formed on the cross members and / or on the stage carriers in a direction transverse to the longitudinal extent of the cross member formed in the stage carriers and / or on the cross members Recesses are retracted for the projections, whereby the cross members between the stage carriers are arranged and a positive connection between the cross members and the stage carriers in the direction of gravity and in all horizontal directions, preferably in all directions transverse to the longitudinal extent of the cross member and in all horizontal directions. This results in the advantage that the step carrier can be arranged at the installation in their final assembly position and then connected without further change in position with the cross members to the support structure of the inventive bleacher segment.

This is done in such a way that projections protruding from the end faces of the cross members in their longitudinal direction in a direction transverse to the longitudinal extent the cross member are retracted in formed on the stage carriers recordings for the projections.

In this case, according to a first variant of the inventive method using cross members, which have at their front sides each have an upper and a lower projection, for connecting the respective cross member with the two stage carriers each first the upper projections of the cross member from the top of the stage carrier ago the images associated with these projections retracted on the stage carriers. Then, the cross member is rotated or pivoted about an axis extending parallel to its longitudinal axis around and the lower projections of the cross member from the front of the stage carrier forth in the projections associated with these recordings on the stage carriers retracted.

According to a second variant of the inventive method are using cross beams, each having an upper projection and a lower projection at their end faces, for connecting the respective cross member with the two stage carriers respectively first lower projections of the cross member from the front of the stage carrier ago the images associated with these projections retracted on the stage carriers. Then, the cross member is rotated or pivoted about an axis extending parallel to its longitudinal axis around and the upper projections of the cross member retracted from the top of the stage carrier forth in the projections associated with these recordings on the stage carriers.

With such methods, a particularly safe and simple assembly is possible, since the cross member can be brought by a retraction of a portion of the projections in the associated receptacles on the stage carriers in a defined position with respect to the stage carrier and then guided by this already in their recordings arranged projections, in a Position can be rotated or pivoted, starting from which then the other projections controlled and can be retracted without much effort in the associated recordings.

In a preferred embodiment of the method, the cross member are pushed during assembly prior to the preparation of their connection with the stage carriers each with its lower edge or with end projections resting on support surfaces formed on the stage supports to their mounting position on the stage carriers, where they are advantageous side of formed on the stage carriers guide elements, such as Guide ribs to be guided.

In a further preferred embodiment of the method, the bottom plates in the assembly in each case with that of their boundary edges ahead, which is provided for adjoining the respective end face of the overlying tribune stage forming cross member, resting on formed on the stage supports bearing surfaces in the direction of this cross member pushed, wherein they preferably laterally formed on the stage carriers guide elements, such as Guide ribs to be guided.

Such assembly methods are particularly power-saving and safe.

If the floor panels are each inserted with their boundary edges, which is provided for adjoining the respective end face of the overlying tribune stage forming cross member, inserted in a groove in the front of this cross member, which is preferred, they are in the region of this boundary edge carried by the cross member and at the same time positively secured against lifting.

In yet another preferred embodiment of the method, the bottom plates in the Mounting in each case in the region of their adjoining the cross member, which forms the end face of the step formed with them, positively secured against lifting. This is done in each case in that a profile contour extending along this abutment of the respective base plate is brought into an undercut on the cross member by displacing the base plate in its plane in the direction of the overlying platform, which forms the end face of the base plate Stage forms.

Further, it is desirable that the connections between the cross members and the step supports are each secured by the assembly of the bottom plates against a release of the connection by extending the projections from the recordings. In this way, these compounds are automatically secured when creating the grandstand segment according to the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

• Fig. 1 eine perspektivische Draufsicht von schräg oben auf ein erfindungsgemässes dreistufiges Tribünensegment;
• Fig. 2 eine Seitenansicht des Tribünensegments aus Fig. 1;
• Fig. 3 eine Vorderansicht des Tribünensegments aus Fig. 1;
• Fig. 4 eine Rückansicht des Tribünensegments aus Fig. 1;
• Fig. 5 eine Draufsicht auf das Tribünensegment aus Fig. 1;
• die Figuren 6 bis 12 stufenweise den Ablauf bei der Herstellung der Verbindung zwischen einem Querträger und einem Stufenträger bei der Montage des Tribünensegments anhand von Seitenansichten und Vertikalschnitten entlang der Linie A-A in Fig.5;
• die Figuren 13 bis 16 stufenweise den Ablauf beim Einsetzen einer Bodenplatte bei der Montage des Tribünensegments anhand von Vertikalschnitten entlang der Linie B-B in Fig.5;
• Fig. 17 einen Vertikalschnitt entlang der Linie B-B in Fig. 5 nach der Montage der Tribünenbestuhlung;
• Fig. 18 eine perspektivische Draufsicht von schräg oben auf einen der Stufenträger des Tribünensegments; und
• Fig. 19 eine perspektivische Draufsicht von schräg oben auf einen der Querträger des Tribünensegments.

Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Show:

• Fig. 1 a perspective top view obliquely from above on a three-stage tribune segment according to the invention;
• Fig. 2 a side view of the bleachers segment Fig. 1 ;
• Fig. 3 a front view of the bleachers segment Fig. 1 ;
• Fig. 4 a rear view of the bleachers segment Fig. 1 ;
• Fig. 5 a plan view of the grandstand segment Fig. 1 ;
• the FIGS. 6 to 12 gradually the process of making the connection between a cross member and a step support in the assembly of the bleachers segment based on side views and vertical sections along the line AA in Figure 5 ;
• the FIGS. 13 to 16 stepwise the sequence when inserting a bottom plate during assembly of the bleachers segment by means of vertical sections along the line BB in Figure 5 ;
• Fig. 17 a vertical section along the line BB in Fig. 5 after mounting the grandstand seating;
• Fig. 18 a perspective top view obliquely from above on one of the stage carrier of the bleacher segment; and
• Fig. 19 a perspective top view obliquely from above on one of the cross member of the bleacher segment.

WAYS FOR CARRYING OUT THE INVENTION

Fig. 1 shows a three-stage tribune segment according to the invention with seating in a perspective plan view obliquely from above.

As in synopsis with the FIGS. 2 to 5 can be seen, which is a side view ( Fig. 2 ), a front view ( Fig. 3 ) and a rear view ( Fig. 4 ) of the bleacher segment 1 and a plan view of the bleacher segment 1 (FIG. Fig. 5 ), the supporting structure of the bleacher segment 1 is formed of two parallel step supports 2, which are interconnected via three cross members 3. The cross member 3 in each case form the end faces of the grandstand stages and border with their ends laterally to the step carrier 2. The areas formed between the step supports 2 and the cross members 3 are spanned by bottom plates 4, which form the tops of the grandstand stages. The bottom plate 4 are supported in the region of their front and rear edges by the adjacent them to cross members 3 and are also on the side of the stage supports 2. At the front of the Cross member 3 are each attached by means of a support bracket 12 tribune chairs 13.

As in synopsis with the FIGS. 6 to 12 which stepwise the sequence in the preparation of the connection between a cross member 3 and a stage support 2 in the assembly of the bleacher segment 1 based on side views ( FIGS. 6 and 7 ) and vertical sections along the line AA in Figure 5 ( FIGS. 10 to 12 ), and further in conjunction with the Figures 18 and 19 which perspective views of a stage carrier 2 ( Fig. 18 ) and a cross member 3 ( Fig. 19 ) of the bleacher segment 1, it can be seen that the connections between the cross members 3 and the step supports 2 are formed by the fact that on the front sides of the cross member 3 projecting button-like projections 5a, 5b are accommodated in receptacles 6a, 6b formed on the stage supports 2, below Forming a positive connection between the cross members 3 and the stage supports 2 in the direction of gravity and in all horizontal directions.

Like from the FIGS. 6 to 12 it can be seen, the cross member 3 in the assembly of the bleachers segment 1 with its lower edge and / or with the lower button-like projections (5a) resting on formed on the stage supports 2 bearing surfaces 8 pushed to its mounting position on the stage supports 2 (see FIGS. 6 and 7 ), wherein they are guided laterally by guide ribs 9 formed on the step supports 2.

Then, the lower button-like projections 5a of the cross member 3 are moved from the front sides of the stage carrier 2 forth in the specific recesses for this 6a to the stage carriers 2 (see Fig. 8 ). In further steps, the cross member 3 are then pivoted about the guided in the receptacles 6a lower projections 5a around up ( Fig. 9 ), raised ( Fig. 10 ) and with the upper button-like projections 5b from the tops of the step supports 2 ago in this for this certain recordings 6b of the stage carrier 2 are suspended ( Figures 11 and 12 ).

The FIGS. 13 to 16 show, starting from the in Fig. 12 shown assembly status, the sequence when inserting the bottom plate 4 by means of vertical sections along the line BB in stepwise Figure 5 ,

As can be seen, the bottom plate 4 ahead with its rear boundary edges, which is provided for adjoining the end face of the overlying tribune stage forming cross member 3, pushed on the support surfaces 8 of the step carrier 2 in the direction of this cross member 3, wherein they laterally is guided by the guide ribs 9 ( Fig. 13 ). Then, the rear boundary edge of the bottom plate 4 is inserted a little way into the groove 7 on the cross member 3, the height of which substantially corresponds to the thickness of the rear boundary edge of the bottom plate 4 ( Fig. 14 ). The lower boundary of the groove 7 is substantially flush with the bearing surfaces 8 formed on the step supports 2, so that the rear boundary edge of the base plate 4 automatically enters the groove 7 during displacement.

Then, the bottom plate 4 with its lateral boundaries on the bearing surfaces 8 of the step carrier 2 and with its front boundary edge on the cross member 3, which forms the end face of the grandstand formed with it, placed. It overlaps with a formed at its front boundary edge and along this boundary edge extending profile contour 10, the upper boundary edge of this cross member 3 ( Fig. 15 ).

Starting from the in Fig. 15 illustrated situation, the bottom plate 4 is now pushed further back until its rear boundary edge at the bottom of the groove 7 of the cross member 3 is present, which forms the end face of the overlying tribune stage. The profile contour 10 moves at the front boundary edge of the bottom plate 4 in an undercut 11 on the cross member 3, which forms the end face of the tribune step formed with it, a, to produce a positive connection with this cross member 3 against lifting of the bottom plate 4 in this area ( Fig. 16 ).

After the floor panels 4 are mounted, the grandstand chairs 13 are attached to these associated support brackets 12 to the cross members 3, whereby at the same time the bottom plates 4 are positively secured against displacement to the front. This situation is in Fig. 17 as a vertical section along the line BB in Figure 5 shown.

The dismantling of the seats 12, 13, the bottom plates 4 and the cross member 3 takes place analogously in reverse order, and indeed, as the assembly, without tools.

While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims.

Claims (22)

1. Multilevel tribune segment (1) comprising a plurality of structural elements (2, 3, 4) which are connected to one another in a detachable way, comprising two level supports (2) arranged next to one another at a distance from one another and connected to one another via a plurality of transverse supports (3), and base plates (4) which span regions formed between the level supports (2) and the transverse supports (3),
   wherein the transverse supports (3) each form the end faces of the tribune levels, laterally adjoin the level supports (2) with their ends and the level supports (2) and the transverse supports (3) penetrate each other in the adjoining area, in each case forming a positive fit between the transverse supports (3) and the level supports (2) in the direction of gravity and in all horizontal directions, in particular in all directions transverse to the longitudinal extension of the transverse supports (3) and in all horizontal directions,
   wherein the transverse supports (3) and the level supports (2) are formed such that the respective connection between them during assembly of the tribune segment (1) is achieved by inserting projections (5a, 5b) formed on the transverse supports (3) into receptacles (6a, 6b) for the projections (5a, 5b), formed on the level supports (2), and can be cancelled by retracting the projections (5a, 5b) from the receptacles (6a, 6b) in the opposite direction when dismantling the tribune segment (1),
   wherein the transverse supports (3) and the level supports (2) are formed in such a way that the connection between them can be established during the assembly of the tribune segment (1) by inserting the projections (5a, 5b) in a direction transverse to the longitudinal extension of the transverse supports (3) into the receptacles (6a, 6b),
   wherein the transverse supports (3) each penetrate laterally into the respective level support (2) with several projections (5a, 5b) formed at their respective ends, forming the positive fit between the transverse support (3) and the level support (2) in gravity direction and in all horizontal directions, in particular in all directions transverse to the longitudinal extension of the transverse support (3) and in all horizontal directions,
   wherein at least two, in particular exactly two, projections (5a, 5b), which are spaced apart from one another in a direction transverse to the longitudinal direction of the respective transverse support (3), are formed at the ends of the transverse supports (3),
   characterized in that the transverse supports (3) and the level supports (2) are formed such that, in order to establish the respective connection between the transverse support (3) and the level support (2) during the assembly of the tribune segment (1), the insertion of a first one (5a) of the at least two projections (5a, 5b) into the associated receptacle (6a) of the level support (2) must be carried out completely or at least partially before the insertion of a second (5b) of the at least two projections (5a, 5b) into the associated receptacle (6b) of the level support (2),
   and in that the transverse supports and the level supports are formed such that the insertion of the first (5a) of the at least two projections (5a, 5b) into the receptacle (6a) associated therewith either

   (a) must be carried out from the top of the level support, before the insertion of the second of the at least two projections into its associated receptacle from the front of the level support
   or

   b) must be carried out from the front side of the respective level support (2), before the insertion of the second (5b) of the at least two projections (5a, 5b) into the receptacle (6b) associated therewith from the top side of the level support (2).
2. Tribune segment (1) according to claim 1, wherein each of these projections (5a, 5b) acts as a positive fit between the transverse support (3) and the level support (2) in the longitudinal direction of the transverse support (3) pointing away from the respective level support (2).
3. Tribune segment (1) according to one of the preceding claims,
   wherein the transverse supports and the level supports are formed in such a way that the insertion of the first (5a) of the at least two projections (5a, 5b) into the receptacle (6a) associated therewith from the front side of the respective level support (2) must be carried out before the insertion of the second (5b) of the at least two projections (5a, 5b) into the receptacle (6b) associated therewith from the top side of the level support (2),
   and wherein the at least two projections (5a, 5b) comprise an uppermost projection (5b) and a lowermost projection (5a), and wherein the transverse supports (3) and the level supports (2) are formed such that insertion of the lowermost (5a) of the at least two projections (5a, 5b) into the associated receptacle (6a) must be carried out from the front of the level support (2) before the insertion of the top (5b) of the at least two projections (5a, 5b) into its associated receptacle (6b) from the top of the level support (2).
4. Tribune segment (1) according to one of the preceding claims, wherein the transverse supports (3) and the level supports (2) are formed in such a way that for insertion of the projections (5a, 5b) into the receptacles (6a, 6b) during assembly the transverse supports (3) must each be rotated or swiveled about an axis parallel to their longitudinal axis relative to the level supports (2), and must be accordingly rotated back or swiveled back during dismantling for retracting the projections (5a, 5b) from the receptacles (6a, 6b).
5. Tribune segment (1) according to one of the preceding claims, wherein the connections between the transverse supports (3) and the level supports (2) are secured in each case by the base plates (4) against cancelling of the connection by retracting the projections (5a, 5b) from the receptacles (6a, 6b).
6. Tribune segment (1) according to one of the preceding claims, wherein the base plates (4) are each secured against lifting off, at that boundary edge which is adjacent to the transverse support (3) forming the end face of the above tribune level, in a positive fit manner by means of that transverse support (3).
7. Tribune segment (1) according to one of the preceding claims, wherein the base plates (4) are each supported, at that boundary edge which is adjacent to the transverse support (3) forming the end face of the above tribune level, by means of that transverse support (3) .
8. Tribune segment (1) according to claim 6 and according to claim 7, wherein the base plates (4) are each pushed into a groove (7) on the front side of the transverse support (3) at that boundary edge which is adjacent to the transverse support (3) forming the end face of the above tribune level.
9. Tribune segment (1) according to claim 8, wherein the lower boundary of the groove (7), from which the respective base plate (4) is supported, is substantially flush with support surfaces (8) formed on the level supports (2) for the side regions of the respective base plate (4).
10. Tribune segment (1) according to claim 9, wherein the support surfaces (8) formed on the level supports (2) are each limited laterally by guide elements (9), in particular by guide ribs (9), for lateral guidance of the respective base plate (4) when it is placed on these support surfaces (8) and when it is inserted into the groove (7) of the respective transverse support (3).
11. Tribune segment (1) according to one of the preceding claims, wherein the base plates (4) are each supported by the transverse support (3) in the region of their abutment against that transverse support (3) which forms the end face of the level formed with them.
12. Tribune segment (1) according to one of the preceding claims, wherein the base plates (4) are each secured against lift off in a positive fit manner by the transverse support (3) in the region of their abutment against that transverse support (3) which forms the end face of the level formed with them.
13. Tribune segment (1) according to claim 12, wherein the base plates (4) engage each, in the region of their abutment with that transverse support (3) which forms the end face of the step formed with them, with a profile contour (10) extending along that abutment in an undercut (11) on this transverse support (3), by generating a positive fit against lift off of the base plate (4) in this region, and in particular wherein the base plates (4) and the transverse supports (3) are each formed in such a way that, in the event of an absence or cancellation of any securing devices (12), the respective base plate (4) can be shifted in such a way in its plate plane for removing the positive fit that the engagement of the profile contour (10) of the base plate in the undercut (11) of the transverse support (3) is cancelled.
14. Tribune segment (1) according to claim 13, wherein the base plates (4) are secured against shifting in a positive fit manner, which would lead to a cancellation of the positive fit against lift off, by functional components of the tribune, in particular by components (12) of a tribune seating (12, 13).
15. Tribune segment (1) according to one of the preceding claims, wherein the connections between the level supports (2) and the transverse supports (3) can be produced without tools and can be cancelled again without tools, and in particular, wherein no additional components are required for the production of these connections.
16. Tribune comprising a plurality of tribune segments (1) according to one of the preceding claims, wherein adjacent tribune segments (1) have common level supports (2).
17. Method of assembling a tribune segment (1) according to any of claims 1 to 15, comprising the steps:

    a) providing two level supports (2) side by side at a distance from each other;

    b) providing a plurality of transverse supports (3) for connecting said level supports (2);

    c) connecting the two level supports (2) by means of the transverse supports (3) to form a common support structure,

    wherein the connections between the transverse supports (3) and the level supports (2) are made by inserting projections (5a, 5b) formed on the transverse supports (3) in a direction transverse to the longitudinal extension of the transverse supports (3) into receptacles (6a, 6b) for the projections (5a, 5b), formed on the level supports (2), by which the transverse supports (3) are arranged between the level supports (2) and a positive fit is produced between the transverse supports (3) and the level supports (2) in gravity direction and in all horizontal directions, in particular in all directions transverse to the longitudinal extension of the transverse support (3) and in all horizontal directions,
    wherein the connections between the transverse supports (3) and the level supports (2) are made by inserting projections (5a, 5b) projecting from the end faces of the transverse supports (3) in the longitudinal direction thereof in a direction transverse to the longitudinal extension of the transverse supports (3) in receptacles (6a, 6b) for the projections (5a, 5b), formed on the level supports (2),
    characterized in that the transverse supports each have an upper projection (5b) and a lower projection (5a) at their end faces and, for connecting the respective transverse support (3) to the two level supports (2), either

    a) in each case the upper projections are first inserted from the upper side of the level supports into the receptacles assigned to these projections on the level supports and the transverse support is then rotated or swiveled about an axis parallel to its longitudinal axis and the lower projections are inserted from the front side of the level supports into these receptacles assigned to these projections on the level supports,
    or

    b) in each case the lower projections (5a) are first inserted from the front side of the level supports (2) into receptacles (6a) assigned to these projections (5a) on the level supports (2) and the transverse support (3) is then rotated or swiveled about an axis parallel to the longitudinal axis of the transverse support (3) and the upper projections (5b) are inserted from the upper side of the level supports (2) into receptacles (6b) assigned to these projections (5b) on the level supports (2).
18. Method according to claim 17, wherein during assembly before their connection to the level supports (2) is made, the transverse supports (3) are each pushed to their mounting position on the level supports (2), each with its lower edge and/or with end projections (5a) resting on support surfaces (8) formed on the level supports (2), wherein they are guided in particular laterally by guide elements (9), in particular by guide ribs (9), formed on the level supports (2).
19. Method according to any of claims 17 to 18, wherein during assembly with that boundary edge in front, which is provided for abutting against the respective transverse support (3) forming the front face of the above tribune level, the base plates (4) are each pushed onto support surfaces (8) formed on the level supports (2) in the direction of that transverse support (3), wherein they are guided in particular laterally by guide elements (9), in particular by guide ribs (9), formed on the level supports (2).
20. Method according to one of the claims 17 to 19, wherein during assembly with that boundary edge in front, which is provided for abutting against the respective transverse support (3) forming the front face of the above tribune level, the base plates (4) are pushed into a groove (7) in the front side of this transverse support (3), whereby they are supported by this transverse support (3) in the region of that boundary edge and are secured against lift off in a positive fit manner.
21. Method according to one of the claims 17 to 20, wherein during assembly in the region of their abutment against that transverse support (3) which forms the end face of the level formed with them, the base plates (4) are each brought into engagement with a profile contour (10) extending along that abutment in an undercut (11) on this transverse support (3) by shifting the base plate (4) in its plate plane in the direction of the above tribune level, by which they are secured against lift off in the area of this abutment in a positive fit manner.
22. Method according to one of the claims 17 to 21, wherein the connections between the transverse supports (3) and the level supports (2) are each secured against lift off of the connection during mounting the base plates (4) by retracting the projections (5a, 5b) from the receptacles (6a, 6b).

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