Bridging device for a structural gap

Abstract

The present invention relates to a bridging device (1) for an expansion joint (2) of central beam construction, in which the profile head of the central beam (5) has at least partially a garland-shaped course of its width in plan view, as a repeated sequence of narrower and wider points in the longitudinal direction of the central beam (5).

Description

[0001] Bridging device for a structural gap

[0002] The present invention relates to a bridging device for a structural gap between two structural parts, having two joint edge profiles which are wavy in plan view and at least one central beam, the central beam extending in a longitudinal direction between the joint edge profiles, being held transversely thereto displaceably in the bridging device and having a profile cross-section which is constructed in at least two parts, wherein a first part is designed as a profile head and a second part is designed as a profile bar and / or profile foot and the profile head has clamping profiles on both sides for the clamped mounting of two elastic sealing tapes arranged laterally on the central beam.

[0003] It is therefore a bridging device with a central beam construction. This type of bridging device is used for bridging structural gaps that exhibit relatively large movements between the adjacent structural elements. It is also referred to as a lane crossing in central beam construction, multi-profile expansion joint or lamella lane crossing. The term "lamella" then stands for the term "central beam". It does not necessarily have to be used to bridge a structural gap in the lane of a road or railroad bridge. Rather, such bridging devices can be used in general in structures that have a structural gap that needs to be bridged - for whatever reason.

[0004] Such a central beam typically has a profile cross-section made up of at least two parts, with a first, upper part in the form of a profile head and a second part underneath in the form of a profile bar and / or profile foot. The profile head also generally has clamping profiles on both sides for clamping two elastic sealing tapes arranged on the sides of the central beam. Depending on the size of the movements at the structural gap to be bridged, not only one central beam is used in such a design, but several central beams are arranged next to each other in the bridging device. In such a case, sealing tapes are not only arranged between the joint edge profile and the respective adjacent central beams, but sealing tapes are also arranged between two adjacent central beams.

[0005] Recently, so-called "wavy expansion joints" have proven to be particularly advantageous for bridging devices without a central beam, which are also known as single-profile bridging devices. In contrast to conventional bridging devices, these have two opposing wavy curved joint edge profiles. This relatively new type of lane crossing has improved noise protection properties and greater movement capacities compared to conventional bridging devices with straight joint edge profiles. In addition, dirt is much less likely to accumulate in the relatively widely exposed sealing tapes, so that one can speak of a self-cleaning effect. This brings considerable advantages in terms of the manufacture, installation and maintenance of this type of bridging device. This is because with conventional designs, diamondshaped or wavy cover plates must also be placed on the joint edge profiles (and also on the central beams in the case of bridging devices with a central beam construction) to improve noise protection. Dirt can accumulate more easily under these cover plates. For this reason, the "wavy expansion joints" are significantly more economical despite the increased effort involved in producing the wavy curved joint edge profiles. A bridging device with wavy joint edge profiles is described in EP 2 322 719 B1 and was patented for the applicant some time ago.

[0006] In the past, it has been shown that it is anything but trivial to convert a single-profile bridging device with wavy joint edge profiles intended only for relatively small movements into one for accommodating larger movements, which then has at least one wavy central beam between the two joint edge profiles. In particular, creating the wavy shape of the central beam by bending is a major challenge. In particular, bending the central beam, which is significantly stiffer than a simple joint edge profile and also has clamping profiles on both sides, is a challenge. Also, when bending a central beam, tighter radii are created in plan view on the inside than on the outside. This means that two joint edge profiles bent into an wavy shape on the same bending machine and a central beam bent in the same way cannot be pushed completely into each other. This results in a smaller degree of opening of the construction and thus a relatively large design or a reduced area of application.

[0007] The invention is therefore based on the task of creating a bridging device for a structural gap in a central beam construction with wavy joint edge profiles, which has a significantly increased range of use with the smallest possible size and a fatigue-resistant and torsion-resistant design of the central beam.

[0008] The solution to this problem is achieved with a bridging device of the type according to the invention, in which the profile head has at least partially a garland-shaped course of its width in plan view as a repeated sequence of narrower and wider points in the longitudinal direction of the central beam.

[0009] The invention therefore moves away from modifying the bending process to solve the problems involved in manufacturing the central beam. It even goes one step further and seeks the approach in a completely new and very complex shaping of the central beam, which cannot be produced by bending a straight central beam of conventional design. This increases the effort involved in manufacturing the central beam because it now has to be produced by welding or casting, for example, due to the complex geometry. Compared to conventional, i.e. straight, central beams, this is also a considerable additional expense, which tends to speak against this approach. On the other hand, it has been shown that the joint edge profiles and also the clamping profiles for the central beam can be manufactured with the same or only a few different bending radii and thus from standardized components. This simplifies their manufacture and at least partially compensates for the disadvantage of the more complex manufacture of the garland-shaped central beam. And with this shape, it is possible to slide the central beam much further into the neighboring joint edge profiles or even into another neighboring central beam. The shape of the central beam fits much better into the wavy joint edge profiles or clamping profiles, which are preferably always produced with the same bending radii. This ensures a very good degree of closure of the bridging device and a correspondingly large area of application with a relatively small size.

[0010] Further forming, the profile head of a central beam according to the invention has, in plan view, two outer longitudinal sides each having an wavy course, wherein the wavy courses of the two longitudinal sides are designed such that they each have at least one wave with a wave mountain and a wave valley and the width of the profile head is greater in the region of the apexes of the wave mountain and the wave valley than in the region between the apexes of the wave mountain and the wave valley. A wave mountain is understood to be a course that could also be described as convex in relation to a central axis of the central beam and a wave valley is a course that could be described as concave. The wave mountains therefore point outwards with their crest or inflection point in relation to the central axis of the central beam, while the wave valleys point inwards with their inflection point.

[0011] In an expedient manner, the wavy course of the two outer longitudinal sides of the profile head are each adapted to the wavy course of an outer longitudinal side of a joint edge profile adjacent thereto and / or the longitudinal side of the profile head of an adjacent further central beam in such a way that the adjacent longitudinal sides extend parallel to one another and can nestle against one another in the pushed-together state of the bridging device. In this way, the bridging device can be brought together as far as possible while maintaining very compact dimensions.

[0012] Further forming, the wavy course of at least one outer longitudinal side of the profile head and / or the joint edge profile has at least one curved section with an at least partially constant radius of curvature. It is therefore a section that is shaped like a circular arc segment. For example, parts of the profile head and / or the joint edge profile can be made from parts that themselves consist of preformed profiles. These may even have originally been straight and be bent into this shape in a relatively simple and uniform manner by means of a constant bending radius.

[0013] It is advantageous if the wavy course of at least one outer longitudinal side of the profile head and / or the joint edge profile has, in plan view, a straight section between two curved sections. In this way, despite the use of uniformly curved parts for the wave mountains and the wave valleys, it is very easy to generate different expansions of the waves in the longitudinal direction of the central beam.

[0014] Further forming, in at least one central beam, the wavy course of a longitudinal side of the profile head differs from the wavy course of a longitudinal side of the profile bar. In this way, the shape of the profile head and the profile bar can be optimized separately, for example with regard to the bending and shear load-bearing capacity of the central beam. In particular, if the longitudinal side of the profile bar has more or less and / or more strongly or more slightly curved waves in the longitudinal direction of the central beam than the longitudinal side of the profile head in the plan view, this results, for example, in a significantly increased or also specifically reduced or optimized bending and torsional strength of the central beam. This means that the fatigue strength of the central beam can be very well adjusted to the respective requirements. Waves with stronger or lighter curvature can be achieved by using different radii of curvature.

[0015] Preferably, at least one joint edge profile and / or one, preferably at least partially prefabricated, wavy clamping profile of a central beam consists of a continuous cast profile, rolled profile, cast part and or a hybrid profile composed of several types of metal. The already known joint edge profiles or clamping profiles can therefore be used. This reduces manufacturing costs. Such joint edge profiles or clamping profiles are already used today for the production of straight joint edge profiles. These are therefore basically known profiles, so that the previously known elastic sealing tapes can also be used. This is because the clamping profile and sealing tape typically have matching geometric properties. For example, sealing tapes typically have thickened edges that fit into the associated clamping profile so that they are held there with a positive and / or non-positive fit.

[0016] In addition, the profile head of the central beam has two, preferably at least partially prefabricated, wavy clamping profiles, which are connected to one another by means of a connecting part. In this way, a very rigid profile head can be produced even when using at least partially prefabricated clamping profiles. The connecting part can also be designed as a seal that prevents the ingress of dirt and moisture.

[0017] Further forming the connecting part is a sheet metal strip placed between and / or on the two clamping profiles of the central beam, which in plan view has a garland-shaped course of its width. The garlandshaped course of the width of the connecting part is conveniently tailored exactly to the shape of the two lateral clamping profiles of the central beam.

[0018] It may be expedient for the profile head to have a cavity that extends between the two clamping profiles and under the connecting part. This is because investigations by the applicant have shown that it is not absolutely necessary for the area under the connecting part and between the two clamping profiles to be filled.

[0019] Alternatively, the profile head can also be designed as an overall solid part, i.e. without relevant cavities, preferably with a garland-shaped sheet metal strip extending over the entire height of the two clamping profiles. The latter can, for example, be inserted between two garland-shaped bent clamping profiles in the form of a plug. For example, existing clamping profiles can be used, shaped into the desired wave form and then welded to the garland-shaped tailored sheet metal strip. It is also relatively easy to produce a very solid profile head, which is particularly advantageous in terms of the bending and torsional strength of the central beam. However, it is also conceivable that the entire profile head could be produced as a cast part, for example. In addition, the profile bar is designed as a solid steel flame-cut part with a rectangular cross-section, the longitudinal sides of which have an wavy course shape in plan view. These can correspond to the shape of one side of the profile head, but do not necessarily have to. This is because it has been shown that, under certain conditions, it can be advantageous if the wavy design of the longitudinal side of the profile head differs from that of the profile bar.

[0020] Nevertheless, it is also conceivable that the profile bar is designed as a thin, rectangular in crosssection, upright bent part made of steel, which is bent wavy in plan view. This is a very advantageous variant in terms of manufacturing costs, which is particularly conceivable if the profile head and / or the profile foot of the central beam is or are already very rigid.

[0021] Further forming, at least one longitudinal side of the profile bar has a different, preferably more or less and / or more strongly or more slightly curved, wavy profile in plan view than at least one longitudinal side of the profile head of the central beam.

[0022] However, it is also conceivable that the profile bar could be designed as a straight sheet metal strip in plan view. This is a very inexpensive form of profile bar to manufacture.

[0023] A profile head designed as a solid part is preferably attached to a profile bar designed as a bent part. This is because a solid profile head is already so rigid that even the use of relatively thin bent sheet metal for the profile bar results in sufficient overall rigidity of the central beam.

[0024] Alternatively, a hollow profile head is attached to a profile bar and / or profile foot designed as a solid flame-cut part. A solid flame-cut part is understood here to be a relatively thick steel part that is formed into the corresponding shape, e.g. by cutting. With such a solid design of the profile bar and / or the profile foot, relatively flexible clamping profiles can be used to produce the profile head. In particular, the use of clamping profiles that are also used for conventional central beams and / or joint edge profiles is conceivable.

[0025] It is advantageous if the profile foot is designed as a sheet metal strip which, in plan view, is at least as wide or wider than the profile head at its widest point. With such a design of the profile foot of the central beam, it is possible in the best case to dispense with a support structure with crossbars, which was previously always mandatory for supporting the central beams. Cross bars are bars that run transversely to the central beams and cross the structural gap below the central beams. These always have the disadvantage that they require a relatively large amount of headroom and also installation space to the left and right of the structural gap in the adjacent structural elements. If the profile foot is designed as a relatively wide sheet metal strip made of flat steel, the profile foot practically takes over the function of the crossbar. In other words, it acts like a bottom chord integrated into the central beam. Further forming, the profile foot has, in plan view, a shape with straight longitudinal sides and / or at least partially wavy longitudinal sides and / or longitudinal sides partially provided with recesses and / or an at least partially garland-shaped course of its width. The design with a wavy longitudinal side, with recesses and / or a garland-shaped course of the width enables a user to reach under the profile foot from above under certain circumstances. This can be useful if there is a component to be serviced underneath that needs to be accessed when installed, e.g. a bearing element.

[0026] The profile foot of the central beam is preferably mounted on at least one bearing element so as to be displaceable in the bridging device. Such a bearing element therefore typically has friction-reducing properties, such as those exhibited by sliding materials with PTFE or UHMWPE.

[0027] Further forming, several bearing elements for the profile foot of the central beam are fastened to two, preferably L-shaped, edge plates of the bridging device arranged left and right of the structural gap. The use of edge plates is not mandatory. However, it enables safe, simple and precise positioning of the bearing elements. In addition, L-shaped edge plates in particular can also be used to attach other parts of the bridging device.

[0028] Preferably, at least one, preferably elastic, control element for a central beam is arranged on the bridging device. During operation of the bridging device, this can bring the central beam back into an initial position after a lateral deflection or also bring the distances between adjacent central beams to a desired dimension. Such control elements are already well known, so that existing control elements can be used for such a design.

[0029] In addition, the profile foot of at least one central beam has at least one control element on its upper side, in particular on its outer edge. In this way, the installation space of the profile foot can be used for attaching the control element.

[0030] It is also advantageous if the control element is fastened under a cantilever plate projecting horizontally and from the side into the structural gap, which in turn is fastened on an upwardly projecting limb of an L-shaped edge plate and laterally covers the profile foot of the adjacent central beam lying underneath at the edge. This prevents the central beam from tilting sideways.

[0031] Further forming, at least one cantilever plate has a side, which in plan view, is wavy and whose wavy shape corresponds to the wavy course of the longitudinal side of the profile bar and / or the profile head of the adjacent central beam.

[0032] It is also conceivable that the bridging device has a plurality of central beams, each of which has a profile foot and / or a profile bar which is not substantially wider than the respective profile head and which are arranged next to one another and displaceably on at least one crossbar. This makes it possible to create a multi-profile bridging device with garland-shaped central beams.

[0033] In the following, the invention will be further explained with reference to embodiments shown in more detail in the drawing. These show schematically:

[0034] Fig. 1 : a sectional view of a first embodiment of a bridging device according to the invention;

[0035] Fig. 2: an enlarged sectional view of the central beam shown in Fig. 1 ;

[0036] Fig. 3: a top view of the profile head of the central beam shown in Fig. 1 and Fig. 2;

[0037] Fig. 4: a top view of the first embodiment of a bridging device according to the invention shown in Fig. 1 ;

[0038] Fig. 5: a spatial view of the first embodiment of a central beam according to the invention shown in Fig. 1 ;

[0039] Fig. 6a: a sectional view of the bridging device in an initial position corresponding to Fig. 1 ;

[0040] Fig. 6b: a sectional view of the bridging device in a wide-open position, corresponding to Fig.

[0041] 1 ;

[0042] Fig. 6c: a sectional view of the bridging device in a closed position corresponding to Fig. 1 ;

[0043] Fig. 7: a spatial view of a second embodiment of a central beam according to the invention with a solid profile bar and wide profile foot;

[0044] Fig. 8: a spatial view of a third embodiment of a central beam according to the invention with a slim profile bar and wide profile foot;

[0045] Fig. 9: a first sectional view of a fourth embodiment of a bridging device according to the invention with a strongly wavy profile bar;

[0046] Fig. 10: a second sectional view of the fourth embodiment of a bridging device according to the invention with a strongly wavy profile bar;

[0047] Fig. 11 : a spatial view of a fifth embodiment of a bridging device with crossbars according to the invention; and

[0048] Fig. 12: a sectional view of the fifth embodiment of a bridging device with crossbars according to the invention shown in Fig. 11 .

[0049] In the figures, identical reference symbols denote similar components, even if these are used in different embodiments and in slightly different designs.

[0050] Fig. 1 to Fig. 6 show a first embodiment of a bridging device 1 according to the invention for a structural gap 2 between two structural parts 3. Fig. 1 shows a sectional view of the bridging device 1 installed in a structure. Fig. 2 shows only the central beam 5 already shown in Fig. 1 for better visualization, but now exposed so that the central beam 5 and the basic structure of the profile crosssection can be better recognized. Fig. 3 is a top view of the profile head 6 of the central beam 5, while Fig. 4 is a top view of the entire bridging device 1 . Fig. 5 is a spatial representation of the bridging device 1 when not installed in the structure. Fig. 6 serves to clarify the function of the bridging device and therefore shows three different operating states or degrees of opening in Fig. 6a to Fig. 6c.

[0051] As can be seen from Fig. 1 , the bridging device 1 serves to bridge a structural gap 2 between two structural parts 3. For this purpose, it has two joint edge profiles 4, which are wavy in plan view, and at least one central beam 5, the central beam 5 extending in its longitudinal direction between the joint edge profiles 4, as can be seen in particular from the plan view of the bridging device 1 in Fig. 4 and its spatial representation in Fig. 5.

[0052] The central beam 5 is held in the bridging device 1 so that it can move transversely. This is important because the expansion joint 2 located between the components 3 works, i.e. it can widen or narrow, for example due to temperature changes.

[0053] The central beam 5 has at least a two-part, in this case four-part, cross-section, as can be seen in particular in Fig. 2. This consists of an upper part, which is referred to here as the profile head 6. This is followed by a middle section, which is referred to below as the profile bar 7, and finally the profile foot 8 at the lower end of the central beam 5. The profile head 6 is itself constructed in two parts and consists here of two clamping profiles 9 for clamping two elastic sealing tapes'! 0 arranged laterally on the central beam 5. The clamping profiles 9 used here are basically the same profiles that are also used to produce the joint edge profiles 4 in the bridging device 1 . However, these are deformed in the shape of waves, as will be explained in more detail below.

[0054] From the top view of the profile head 6 of the central beam 5 shown in Fig. 3, it can now be clearly seen that it has an unusual geometry. It has two outer longitudinal sides 11 of the clamping profiles 9, which are represented in the figure by the uppermost and lowermost wavy lines, each of which is at least partially wavy curved in the plan view. In addition, the central beam 5 has at least partially a garland-shaped course of its width in plan view as a repeated sequence of narrower and wider points in the longitudinal direction of the central beam.

[0055] As can also be seen in Fig. 3, the wavy course of both outer longitudinal sides 11 of the profile head 6 of the central beam 5 is designed in such a way that at least one wave 12 with a wave mountain 13 and a wave valley 14 is formed. The radius of curvature R1 of the wave mountain 13 is smaller than the radius of curvature R2 of the wave valley 14. The radii of curvature R1 and R2 are represented here by symbolic arrows, which are not themselves part of the device and have only been drawn in here for illustration purposes of the radius of curvature. Furthermore, these are curvatures with a radius of curvature R1 , R2 that is kept as constant as possible. They are therefore sections 15, 16 curved in the shape of an arc of a circle, between each of which a section 17 of the respective clamping profile 9, which is straight in plan view, is arranged. As can be clearly seen from the section in Fig. 2 and above all from the top view in Fig. 3, the profile head 6 and profile bar 7 are designed in this design example in such a way that their outer longitudinal sides 11 and 18, which lie on top of each other in relation to the profile cross-section, each have the same wavy course of their width. Therefore, only a single line can be seen in the plan view. However, this congruent course of the outer longitudinal sides 11 and 18 of the profile head 6 and profile bar 7 is not mandatory.

[0056] Another remarkable feature of the first embodiment example is that the cross-section of the profile bar 7 is very solid, as can be clearly seen in Fig. 1 and Fig. 2. Specifically, it is a rectangular crosssectioned steel flame-cut part. This solid profile bar 7 results in a particularly rigid design of the central beam 5.

[0057] In the first embodiment shown here, the profile foot 8 has a rectangular shape in plan view. Its two longitudinal sides 19 therefore have a straight and thus different shape than the outer longitudinal sides 11 of the profile head 6 and the outer longitudinal sides 18 of the profile bar 7. In addition, the profile foot 8 is wider than the profile head 6 and the profile bar 7. It can thus serve in the manner of a joist to stiffen and above all to support the central beam 5 within the bridging device 1 . This effect is so pronounced that it is possible to dispense with an otherwise conventional crossbeam for supporting the central beam 5 in the bridging device 1 . This considerably reduces the overall height and noticeably extends the range of use of the bridging device 1 according to the invention.

[0058] As can be seen from the two plan views in Fig. 3 and Fig. 4, the two opposing longitudinal sides 11 of the profile head 6 are each designed in the shape of a wave and arranged offset to one another in such a way that a wave mountain 13 in one longitudinal side 11 is associated with a wave valley 14 in the opposite longitudinal side 11 of the profile head 6. As a result of this design, the profile head 6 and thus the central beam 5 has a different width in the longitudinal direction when viewed from above. It becomes narrower and thicker again, and this happens several times.

[0059] As can be seen in Fig. 4, the outer longitudinal sides 20 of the two joint edge profiles 4 facing the structural gap 2 or the central beam 5 also each have an wavy shape. The same radii of curvature R1 and R2 are also used here, with straight sections 17 between the corresponding curved sections 15 and 16. Ideally, the wavy courses of the respective longitudinal outer sides of the profile sections of the central beam 5 and the adjacent joint edge profiles 4 can then be matched to each other in such a way that they complement each other perfectly in plan view, as can be seen in Fig. 4. This ensures that the bridging device 1 can be retracted extremely tightly. When the bridging device 1 is fully retracted, its two joint edge profiles 4 can then nestle along the outer longitudinal sides 11 of the two clamping profiles 9, as shown in Fig. 6c. The advantage of designing the longitudinal sides of the joint edge profiles 4 and the clamping profiles 9 of the profile head 6 in the same way is that both single-profile and multi-profile bridging devices can be produced in a wave shape with relatively little effort. Such a garland-shaped course can be assembled from modular prefabricated clamping profile segments by welding the previously bent clamping profile segments together. As the respective radii of curvature of joint edge profile 4 and clamping profile 9 are the same, several sections bent with the radius of curvature R1 as wave mountains and several segments bent concavely with the radius of curvature R2 as wave valleys can ultimately be pre-produced and used both for the production of a joint edge profile 4 and for the production of a clamping profile 9 of the profile head 6 of a central beam 5.

[0060] The starting profiles used here to manufacture the clamping profiles 9 and joint edge profiles 4 formed according to the invention are profiles that the applicant also uses to manufacture conventional, i.e. straight, joint edge profiles. Only here they are bent. They can be made of a single material, but can also be composed of several materials. This is referred to as a hybrid profile in which the upper part of the clamping profile 9 is made of stainless steel, for example, while the lower part of the clamping profile is made of a less expensive metal.

[0061] In Fig. 6a to Fig. 6c, a sectional view of the first embodiment shown in three different situations is used to explain how it works in more detail. Fig. 6a shows an initial position in which the central beam 5 is in a central position within the structural gap 2. If the structural gap opens as shown in Fig. 6b or closes as shown in Fig. 6c, the central beam 5 slides with its profile foot 8 on bearing elements 24 arranged underneath. These are made of a low-friction sliding material and are attached to two L-shaped edge plates 25 arranged to the left and right of the structural gap 2 in the respective structural parts 3.

[0062] The bridging device 1 also has at least one control element 26 to ensure that the central beam 5 is always as central as possible within the structural gap 2. This is used to bring the central beam 5 back into the starting position after a lateral deflection of at least one of the two components 3. In the present case, such control elements 26 are arranged on both sides of the bridging device 1 . These are each made of an elastic material and are each attached to the upper side of the profile foot 8 and under a cantilever plate 27 projecting into the structural gap 2 from each side. These two cantilever plates 27 each sit on the upwardly projecting leg of the underlying L-shaped edge plate 25.

[0063] The second embodiment shown in Fig. 7 is an embodiment example in which the central beam 5 and also the rest of the bridging device 1 , which is not shown further, is essentially designed exactly as in the first embodiment. The only difference here is that the two clamping profiles 9 of the profile head 6 of the central beam5 are additionally connected at their upper side by means of a connecting part 21. In the present embodiment, this is a sheet metal strip placed between the two upper inner edges of the two clamping profiles 9 of the central beam 5, the width of which also has a garland-shaped profile and which seals and stabilizes the profile head 5 at the top. The third embodiment of a bridging device according to the invention shown in Fig. 8 is also one that differs from the first two embodiments only in the design of the central beam 5. Only in this case, the profile head 6 is significantly more solid and the profile bar 7 is significantly slimmer. The two clamping profiles 9 of the profile head 6 of the central beam 5 are less high and are connected along their entire height on their inner sides by means of a connecting part 21 . This relatively solid connecting part 21 is therefore as high as the two clamping profiles 9. In this embodiment, it is also a sheet metal strip, the width of which has a garland-shaped course - i.e. a repeated sequence of narrower and wider points in the longitudinal direction - and thus seals and stabilizes the profile head 5 at the top.

[0064] Another aspect of this embodiment is that the entire, very rigid profile head 6 is now supported by a much slimmer profile bar 7. As shown here, this can be made from a relatively thin and inexpensive flat steel. Its central axis can then have a wavy course with a constant wave form below the central axis of the profile head 6.

[0065] Alternatively, and as in the two sections shown in Fig. 9 and Fig. 10 through a fourth embodiment example of the bridging device 1 according to the invention, the slender profile bar 7 with its two longitudinal sides 18 can also have a course in plan view with significantly more waves than the profile head 6. The use of an easily bendable flat steel has the advantage that its contribution to the stiffening of the central beam 5 can be very easily adapted to different load situations. This makes it very easy to change both the bar height and the number of corrugations in the profile bar 7.

[0066] In the section shown in Fig. 9, the center of the profile bar 7 is located exactly below the center of the profile head 6. Due to the use of a significantly smaller radius of curvature, the longitudinal sides 18 and also the center axis of the profile bar 6 now do not follow the course of the center axis of the profile head 6. Therefore, in the sectional view of Fig. 10, the profile bar 7 is offset laterally to the left below the connecting part 21 arranged centrally in the profile head 6. This strong corrugation of the web 7 makes the central beam 5 very rigid.

[0067] Figs. 11 and 12 show a fifth embodiment in which the profile head 6 and the profile bar 7 of the central beam 5 are designed in the same way as in the second embodiment. The only difference here is that the solid profile bar 7 also acts as the profile foot 8.

[0068] The central beam 5 is now held movably in the bridging device 1 with the aid of three crossbars 22 extending transversely to the structural gap 2. Fortheir part, these are movably mounted on each side of the structural gap 2 in the relevant component 3 in corresponding crossbar boxes 23. Reference signs

[0069] 1. Bridging device

[0070] 2. Structural gap

[0071] 3. Structural part

[0072] 4. Joint edge profile

[0073] 5. Central beam

[0074] 6. Profile head

[0075] 7. Profile bar

[0076] 8. Profile foot

[0077] 9. Clamping profile

[0078] 10. Sealing tape

[0079] 11 . Longitudinal side of the profile head

[0080] 12. Shaft

[0081] 13. Wave mountain

[0082] 14. Wave valley

[0083] 15. Curved section with radius of curvature R1

[0084] 16. Curved section with radius of curvature R2

[0085] 17. Straight section

[0086] 18. Longitudinal side of the profile bar

[0087] 19. Longitudinal side of the profile foot

[0088] 20. Longitudinal side of the joint edge profile

[0089] 21. Connecting part

[0090] 22. Cross bar

[0091] 23. Cross bar box

[0092] 24. Bearing element

[0093] 25. Edge plate

[0094] 26. Control element

[0095] 27. Cantilever plate

[0096] R1 Radius of curvature of the wave mountain

[0097] R2 Radius of curvature of the wave valley

Claims

Claims1 . Bridging device (1) for a structural gap (2) between two structural parts (3), having two joint edge profiles (4) which are wavy in plan view and at least one central beam (5), the central beam (5) extending in a longitudinal direction between the joint edge profiles (4), being held transversely thereto displaceably in the bridging device (1) and having a profile cross-section which is constructed in at least two parts, wherein a first part is designed as a profile head (6) and a second part is designed as a profile bar (7) and / or profile foot (8) and the profile head (6) has clamping profiles (9) on both sides for the clamped mounting of two elastic sealing tapes (10) arranged laterally on the central beam (5), characterized in that the profile head (6) has, in plan view, an at least partially garland-shaped course of its width as a repeated sequence of narrower and wider points in the longitudinal direction of the central beam (5).

2. Bridging device according to claim 1 , characterized in that the profile head (6) has, in plan view, two outer longitudinal sides (11) each having an wavy course, the wavy courses of the two longitudinal sides (11) being designed such that they each have at least one wave (12) with a wave mountain (13) and a wave valley (14), and the width of the profile head (6) is greater in the region of the apexes of the wave mountain (13) and of the wave valley (14) than in the region between the apexes of the wave mountain (13) and wave valley (14).

3. Bridging device according to one of claims 1 or 2, characterized in that the wavy course of the two outer longitudinal sides (11) of the profile head (6) are each adapted to the wavy course of an outer longitudinal side (20) of a joint edge profile (4) adjacent thereto and / or the longitudinal side (11) of the profile head (6) of an adjacent further central beam (5) in such a way that the adjacent longitudinal sides (11 , 20) extend parallel to one another and can nestle against one another in the pushed-together state of the bridging device (1).

4. Bridging device according to one of the preceding claims, characterized in that the wavy course of at least one outer longitudinal side (11 , 20) of the profile head (6) and / or of the joint edge profile (4) has at least one curved section (15, 16) with an at least partiallyconstant radius of curvature (R).

5. Bridging device according to claim 4, characterized in that the wavy course of at least one outer longitudinal side (11 , 20) of the profile head (6) and / or of the joint edge profile (4) has, in plan view, a straight section (17) between two curved sections (15, 16).

6. Bridging device according to one of the preceding claims, characterized in that in at least one central beam (5), the wavy course of a longitudinal side (11) of the profile head (6) differs from the wavy course of a longitudinal side (18) of the profile bar (7).

7. Bridging device according to claim 6, characterized in that the longitudinal side (18) of the profile bar (7) has, in plan view, more or less and / or more strongly or more slightly curved waves (12) in the longitudinal direction of the central beam (5) than the longitudinal side (11) of the profile head (6).

8. Bridging device according to one of the preceding claims, characterized in that at least one joint edge profile (4) and / or one, preferably at least partially prefabricated, wavy clamping profile (9) consists of a continuous cast profile, rolled profile, cast part and / or a hybrid profile composed of several types of metal.

9. Bridging device according to one of the preceding claims, characterized in that the profile head (6) of the central beam (5) has two, preferably at least partially prefabricated, wavy clamping profiles (9) which are connected to one another by means of a connecting part (21).

10. Bridging device according to claim 9, characterized in that the connecting part (21) is a sheet metal strip placed between and / or on the two clamping profiles (9) of the central beam (5), which in plan view has a garland-shaped course of its width.11 . Bridging device according to one of claims 9 or 10, characterized in thatthe profile head (6) has a cavity that extends between the two clamping profiles (9) and under the connecting part (21).

12. Bridging device according to one of claims 1 to 10, characterized in that the profile head (6) is designed as a solid part, preferably with a garland-shaped sheet metal strip (21) extending over the entire height of the two clamping profiles (9).

13. Bridging device according to one of the preceding claims, characterized in that the profile bar (7) is designed as a solid steel flame-cut part with a rectangular cross-section, the longitudinal sides (18) of which each have an wavy course in plan view.

14. Bridging device according to one of claims 1 to 12, characterized in that the profile bar (7) is designed as a thin, rectangular in cross-section, upright arranged bent part made of steel, which is bent wavy in plan view.

15. Bridging device according to one of the preceding claims, characterized in that at least one longitudinal side (18) of the profile bar (7) has a different, preferably more or less and / or more strongly or more slightly curved, wavy profile in plan view than at least one longitudinal side (11) of the profile head of the central beam (5).

16. Bridging device according to one of the preceding claims 1 to 16, characterized in that the profile bar (7) is designed as a straight sheet metal strip in plan view.

17. Bridging device according to one of claims 1 to 10 or 12 to 16, characterized in that a profile head (6) designed as a solid part is attached to a profile bar (7) designed as a bent part.

18. Bridging device according to one of the preceding claims, characterized in that a hollow profile head (6) is attached to a profile bar (7) and / or profile foot (8) designed as a solid flame-cut part.

19. Bridging device according to one of the preceding claims, characterized in that the profile foot (8) is designed as a sheet metal strip which, in plan view, is at least as wide as the profile head (6) at its widest point or wider.

20. Bridging device according to one of the preceding claims, characterized in that the profile foot (8) has, in plan view, a shape with straight longitudinal sides and / or at least partially wavy longitudinal sides and / or longitudinal sides partially provided with recesses and / or an at least partially garland-shaped course of its width.

21. Bridging device according to one of the preceding claims, characterized in that the profile foot (8) of the central beam (5) is mounted on at least one bearing element (24) so as to be displaceable in the bridging device (1).

22. Bridging device according to one of the preceding claims, characterized in that several bearing elements (24) for the profile foot (8) of the central beam (5) are fastened to two, preferably L-shaped, edge plates (25) arranged left and right of the structural gap (2).

23. Bridging device according to one of the preceding claims, characterized in that at least one, preferably elastic, control element (26) for a central beam (5) is arranged on the bridging device (1).

24. Bridging device according to one of the preceding claims, characterized in that the profile foot (8) of at least one central beam (5) has a control element (26) on its upper side.

25. Bridging device according to one of the preceding claims, characterized in that at least one control element (26) is fastened under a cantilever plate (27) projecting horizontally and from the side into the structural gap (2), which in turn is fastened on an upwardly projecting limb of an L-shaped edge plate (25) and laterally covers the profile foot (8) of the adjacent central beam (5) lying underneath the edge.

26. Bridging device according to one of the preceding claims, characterized in thatat least one cantilever plate (27) has a side which, in plan view, is wavy and whose wavy course corresponds to the wavy course of the side of the profile bar (7) and / or the profile head (6) of the adjacent central beam (5).

27. Bridging device according to one of the preceding claims, characterized in that the bridging device (1) has a plurality of central beams (5), each of which has a profile foot (8) and / or a profile bar (7) which is not substantially wider than the respective profile head (6) and which are arranged next to one another and displaceably on a cross-member (22).

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