Bridging device for a structural gap

Abstract

The present application relates to a bridging device (1) for an expansion joint (2) in a center beam design, in which the profile foot (8) of the center beam (5) is significantly wider in the top view than the profile head (6) at its widest point. This means that there is no need for a crossbeam structure to support the center beam (5) in the structural gap.

Description

[0001] Bridging device for a structural gap

[0002] The present invention relates to a bridging device for a structural gap between two structural elements, which bridging device comprises two joint edge profiles and a center beam, the center beam extending in its longitudinal direction between the joint edge profiles, is held in the bridging device so as to be displaceable transversely thereto and has a profile cross section of at least two-part design, wherein a first part is formed as a profile head and a second part is formed as a profile foot, and the profile head comprises clamping profiles on both sides for the clamping retention of two elastic sealing strips arranged laterally on the center beam.

[0003] Thus, it is a bridging device in a center beam design. This type of bridging device is used for bridging of structural gaps that have relatively large movements of adjacent structural elements relative to each other. It is also referred to as a road deck crossing, multi-profile expansion joint, or lamella road deck crossing. In this case, the term "lamella" stands for the term "center beam". Nor does it necessarily have to be used to bridge a structural gap in a roadway, pedestrian or railroad bridge. Rather, such bridging devices can be used quite generally in structures that comprise a structural gap that needs to be bridged - for whatever reason. The only important thing is that the bridging device can be used to transfer live loads across the structural gap.

[0004] It is typical for the known center beam design that the at least one center beam rests on a crossbeam structure. This crossbeam structure usually has cross beams, so-called support bars, which are held in the bridging device so that they can be moved and / or pivoted. These, in turn, are attached to the two structural parts by means of support boxes to be installed in the structure specifically for this purpose. One advantage of this design is that, depending on the size of the gap to be bridged, not only one center beam but several center beams can be arranged next to each other in the structural gap on the underlying cross beams. The disadvantage, however, is the relatively large construction effort and a relatively large overall height.

[0005] It is therefore one object of the invention to create a bridging device for a structural gap with a center beam, which has the smallest possible size and a fatigue-resistant and load-bearing design of the center beam.

[0006] This object is solved by a bridging device of the generic type, in which according to the invention the profile foot in the top view is significantly wider than the profile head at its widest point. Significantly wider means a difference in width which is a multiple of the usual manufacturing tolerances. The profile foot is therefore generally several centimeters wider than the profile foot. The invention thus breaks away from the idea that the profile head of the center beam forms the widest point of the center beam cross section or has the same width as the profile foot. This is a new approach in that, up to now, the cross section of center beams has been designed in such a way that two adjacent center beams should be able to come into contact or nestle against each other in the area of their profile heads. This presupposed that the profile foot was in any case no wider than the profile head. In contrast, the profile foot, which is formed unusually wide according to the invention, can be used for stiffening the center beam and also for load-bearing and fatigue-resistant fastening of the center beam in the bridging device. In the best case, a supporting structure to support the center beam in the area of the structural gap can be omitted. In this way, the profile foot practically takes over the function of the support bar. In other words, it acts like a crossbeam integrated into the longitudinal beam. All this considerably reduces the construction effort and the overall height.

[0007] Further, in the top view, the profile foot is at least 1 .5 times, preferably 2 to 4 times, as wide as the profile head at its widest point. This dimension ensures a sufficiently secure load-bearing and fatigueresistant fastening of the center beam in the bridging device.

[0008] Preferably, the profile foot is wider than the maximum width of the structural gap, at least in some areas. In this case, the use of a crossbeam structure to support the center beam can be dispensed with completely. This is because the center beam can then be supported directly on both sides of the gap between the two adjacent structural parts, without the need for intermediate use of underlying crossbeams.

[0009] The profile foot is functionally designed as an elongated and flat plate, preferably as a strip of a sheet metal. This design ensures simple and thus relatively inexpensive manufacturing of the center beam, even if the profile head comprises a significantly more complex design. The sheet metal can be made of steel or another suitable material.

[0010] Further, in the top view, the profile foot comprises a shape with straight longitudinal sides and / or at least partially undulating longitudinal sides and / or longitudinal sides partially provided with recesses and / or an at least partially garland-shaped course of its width. This is to be understood here as a course which has a repeated sequence of narrower and wider points in the longitudinal direction of the center beam. The design with a undulating 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 in the installed state, such as a bearing element.

[0011] It is advisable that the profile foot of the center beam is displaceably supported on at least one bearing element 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. Further several bearing elements for the profile foot of the center beam are fastened to two, preferably U- or L-shaped, edge plates of the bridging device arranged on the left and right of the structural gap. The use of edge plates is not mandatory. But it allows a safe, simple and accurate positioning of the bearing elements. In addition, U- or L-shaped edge plates in particular can also be used to fasten other parts of the bridging device.

[0012] When U-shaped edge plates are used, their upper legs can be installed flush with the top of a road surface in the structure. This facilitates the installation of the bridging device in the structure.

[0013] It is advisable that at least one, preferably elastic, control element for the center beam is arranged on the bridging device. During an operation of the bridging device, this can return the center beam to an initial position after a lateral deflection. The at least one control element or the totality of several control elements is intended to ensure that the center beam is as far as possible always located in the center of the structural gap, that means that the distances between the outer longitudinal side of the profile head and the outer longitudinal side of the respective adjacent joint edge profile are as far as possible always the same on both sides of the profile head. Such control elements are already sufficiently known, so that it is possible to use already existing control elements for such a design.

[0014] Furthermore, the profile foot of the center beam also comprises at least one control element on its upper side, in particular on the outer edge. In this way, the installation space of the profile foot can be used for mounting the control element.

[0015] It is also advantageous if the control element is mounted under a part of the edge plate projecting horizontally and from the side into the structural gap or a cantilever plate arranged thereon and this laterally covers the underlying profile foot of the adjacent center beam at the edge. In this way, lateral tilting of the center beam can be prevented.

[0016] In a particularly easy-to-produce embodiment, the profile head has a constant course of its width in the longitudinal direction of the center beam in the top view. A straight profile head of a classic embodiment can therefore be used.

[0017] In an alternative embodiment, the profile head has an at least partially undulated profile in the top view, in particular a garland-shaped profile of its width as a repeated sequence of narrower and wider points in the longitudinal direction of the center beam. This means that the profile head has a very special undulating design, at least in certain areas.

[0018] The center beam therefore has a completely new and very complex shape, even in the area of the profile head. This shape cannot be produced by bending a straight center beam of conventional design. This increases the cost of manufacturing the center beam because it now has to be produced by welding or casting, for example, due to the complex geometry of the profile head. Compared with conventional, that means straight, center beams, this is also a considerable additional cost, which tends to argue against this solution approach. On the other hand, it has been shown that the joint edge profiles and also the clamping profiles for the center beam can be produced with the same or only a few different bending radii and thus from standardized components. This simplifies their manufacturing and at least partially compensates for the disadvantage of the more complex production of the garland-shaped center beam. And with this shape, the center beam can be nested much further into the neighboring joint edge profiles. The shape of the center beam nestles much better into the undulating joint edge 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 range of application with a relatively small size.

[0019] Furthermore, the profile head of a center beam according to the invention has two outer longitudinal sides in the top view, each with an undulating course, the undulating courses of the two longitudinal sides being designed in such a way that they each comprise at least one wave with a wave crest and an wave trough, and the width of the profile head is greater in the region of the peaks of the wave crest and the wave trough than in the section between the crests of the wave crest and the wave trough. A wave crest is a profile that could also be described as convex in relation to a center axis of the center beam, and a wave trough is a profile that could be described as concave. The wave crests point outward with their crests or peaks with respect to the center axis of the center beam and the wave troughs point inward with respect to the center axis of the center beam.

[0020] In an advisable manner, the course of the two outer longitudinal sides of the profile head is in each case adapted to the course of an outer longitudinal side of a joint edge profile adjacent thereto in such a way that the adjacent longitudinal sides extend parallel to one another and can nestle against one another when the bridging device is pushed together. In this way, maximum contraction of the bridging device can be achieved while at the same time maintaining very compact dimensions of the device. The course of the corresponding longitudinal side can be straight in the simplest form. Then both adjacent longitudinal sides are straight and parallel to each other. However, a single-curved or a multiple-curved, for example undulating, course of the long sides is also conceivable. In this case, it is only important to ensure that the two adjacent long sides extend parallel to each other and nestle against each other when pushed together.

[0021] Further, the undulating course of at least one outer longitudinal side of the profile head and / or of the joint edge profile has at least one curved section with a radius of curvature that is constant at least in some areas. It is then a section that is shaped according to an arc segment. For example, parts of the profile head and / or the joint edge profile can be made from parts which themselves consist of preformed profiles. These can then even have originally been straight and be bent into this shape in a relatively simple and uniform manner by means of a bending radius that is kept constant.

[0022] It is advantageous if the undulating course of at least one outer longitudinal side of the profile head and / or the joint edge profile has a straight section in the top view between two curved sections. In this way, despite the use of uniformly curved sections for the wave crests and the wave troughs, it is possible to generate different expansions of the waves in the longitudinal direction of the center beam in a very simple manner.

[0023] Further, the profile cross section of the center beam is designed in such a way that a profile web is arranged between the profile head and the profile foot. This increases the bending stiffness of the center beam.

[0024] The profile web can be designed as a straight and / or at least partially undulating sheet metal strip in the top view. This is a very inexpensive form of the profile web to be manufactured.

[0025] Alternatively, the profile web is designed as a solid component with a rectangular cross section, for example made of steel, whose longitudinal sides each have a straight and / or undulating course in the top view. These can correspond to the course 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 design of the longitudinal side of the profile head differs from that of the profile web.

[0026] Nevertheless, it is conceivable that the profile web is also designed as a thin bent part with a rectangular cross section and arranged vertically, which in the top view has a straight and / or undulating profile at least in certain areas. 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 center beam is / are already itself very rigid.

[0027] Further, at least one longitudinal side of the profile web comprises a different, preferably more or less and / or more strongly or more lightly curved wave in the top view, than at least one longitudinal side of the profile head of the center beam.

[0028] Preferably, at least one joint edge profile and / or one clamping profile consists of a continuous cast profile, rolled profile, casting and / or a hybrid profile composed of several metal grades. It is therefore possible to use the already known joint edge profiles or clamping profiles. This reduces manufacturing costs. Such joint edge profiles or clamping profiles are already used today for the manufacture of straight joint edge profiles. They are therefore basically familiar profiles, so that the elastic sealing stripes known up to now can also be used. This is because clamping profiles and sealing stripes typically have geometric properties that are matched to each other. For example, sealing stripes typically have thickened edges that fit into the associated clamping profile so that they are held there in a form-fit and / or force-fit manner.

[0029] It is useful if the profile head of the center beam has two, preferably at least partially prefabricated, clamping profiles which are connected to each other by means of a connecting part. In this way, even when using at least partially prefabricated clamping profiles, an inherently very rigid profile head can be produced. The connecting part can also be designed like a seal that prevents the ingress of dirt and moisture.

[0030] Further, the connecting part is a sheet metal strip placed between and / or on the two clamping profiles of the center beam. In the top view, this can comprise a constant or garland-shaped course of its width. The course of the width of the connecting part advisably corresponds exactly to the course of the two lateral clamping profiles of the center beam.

[0031] It may be advisable for the profile head to have a cavity extending between the two clamping profiles and under the connecting part. This is because investigations by the applicant have shown that it is not necessary for the area under the connecting part and between the two clamping profiles to be filled.

[0032] Alternatively, the profile head can also be designed as an overall solid part, that means without relevant cavities, preferably with a sheet metal strip extending over the entire height of the two clamping profiles. The latter can be inserted, for example, in the manner of a plug between two clamping profiles. For example, existing clamping profiles can be used and welded to the sheet metal strip. It is also possible to produce a very solid profile head in a relatively simple manner, which has advantages particularly in terms of the bending and torsional strength of the center beam. However, it is also conceivable to manufacture the entire profile head as a casting, for example.

[0033] Preferably, a profile head designed as a solid part is fastened to a thin profile web, possibly designed as a bent part. This is because a solid profile head in particular is already so rigid that even the use of relatively thin sheet metal for the profile web results in an overall sufficient rigidity of the center beam.

[0034] Alternatively, a hollow profile head is attached to a thick profile web and / or profile foot, preferably designed as a solid part. A solid part is understood here to be a relatively thick steel part which is brought into the corresponding shape, for example by flame cutting. Particularly with such a solid embodiment of the profile web and / or the profile foot, relatively flexible clamping profiles can then be used to manufacture the profile head. In particular, the use of clamping profiles which are also used for conventional center beams and / or joint edge profiles is conceivable. Further, the course of one longitudinal side of the profile head in the center beam differs from the course of one longitudinal side of the profile web. In this way, the shape of the profile head and the profile web can be optimized separately from one another, for example undulatory, with regard to the bending and shear force load-bearing capacity of the center beam. In particular, if the longitudinal side of the profile web in the top view has more or fewer and / or more strongly or more lightly curved waves in the longitudinal direction of the center beam than the longitudinal side of the profile head, the result is, for example, a significantly increased or also specifically reduced or optimized bending and torsional strength of the center beam. In this way, the fatigue strength of the center beam can be very well adjusted to the respective requirements. More or less curved shafts result from the use of correspondingly different radii of curvature.

[0035] In the following, the invention will be further explained by means of embodiments shown in more detail in the drawing. Therein, it is schematically shown in:

[0036] Fig. 1 a sectional view of a first embodiment of a bridging device according to the invention;

[0037] Fig. 2 a spatial view of the first embodiment shown in Fig. 1 ;

[0038] Fig. 3 a sectional view of a second embodiment of a bridging device according to the invention;

[0039] Fig. 4 a spatial view of the second embodiment shown in Fig. 3;

[0040] Fig. 5 an enlarged sectional view of the center beam shown in Fig. 3;

[0041] Fig. 6 a top view of the profile head of the center beam shown in Fig. 3 and Fig. 4;

[0042] Fig. 7 a top view of the second embodiment of a bridging device according to the invention shown in Fig. 3;

[0043] Fig. 8a a sectional view corresponding to Fig. 3 of the bridging device in an initial position;

[0044] Fig. 8b a sectional view corresponding to Fig. 3 of the bridging device in a wide-open position;

[0045] Fig. 8c a sectional view corresponding to Fig. 3 of the bridging device in a closed position;

[0046] Fig. 9 a spatial view of a third embodiment of a center beam according to the invention with a solid profile web and a wide profile foot; and

[0047] Fig. 10 a spatial view of a fourth embodiment of a center beam according to the invention with a slim profile web and a wide profile foot.

[0048] In the figures, the same reference numerals denote components of the same type, even if they are used in different embodiments and in slightly different configurations.

[0049] Fig. 1 and Fig. 2 show a first embodiment of a bridging device 1 according to the invention for a structural gap 2 between two structural elements 3. This is used to bridge a structural gap 2 between two structural elements 3 for traffic crossing over it. As can be seen from Fig. 2, the bridging device 1 has two joint edge profiles 4 that are straight in the top view and a center beam 5 that is also straight in the top view. The center beam 5 extends in its longitudinal direction parallel to and between the two joint edge profiles 4. The center beam 5 is held transversely displaceably in the bridging device 1 . This is important because the structural gap 2 located between the structural parts 3 is changing, that means can widen or narrow, for example, due to temperature changes.

[0050] The center beam 5 comprises an at least two-part, in this case three-part, cross section, as can be seen in particular from the sectional view in Fig. 1 . This consists of an upper part, which is referred to here as the profile head 6. This is followed by a middle part below, which is referred to below as the profile web 7, and finally by the profile foot 8 at the lower end of the center beam 5.

[0051] Here, the profile foot 8 is formed significantly wider than the profile head 6 and the profile web 7. Thus, it can work as a downstand beam for stiffening and, above all, for supporting the center beam 5 within the bridging device 1 . This effect is so pronounced that it is possible to dispense with an otherwise conventional cross member for supporting the center beam 5 in the bridging device 1 . This considerably reduces the overall height and noticeably extends the range of application of the bridging device 1 according to the invention.

[0052] Above the profile foot 8 is the profile web 7, which is also straight in this embodiment. Here, this is a relatively thin web that is integrally connected to the profile foot 8. This is because the profile foot 8 and profile web 7 can be formed from an upside-down T-beam, for example, as shown here. However, this need not necessarily be the case. It is quite conceivable that the profile foot 8 and the profile web 7 are made from separate components that are welded together.

[0053] At the upper end of the profile web 7 is the upper section of the center beam 5, referred to here as profile head 6. The profile head 6 is also straight in this embodiment example in the top view. It is formed here from the upper end of the inverted T-beam and two clamping profiles 9 arranged laterally on its web 7.

[0054] The clamping profiles 9 used here are basically the same profiles that are also used to make the joint edge profiles 4 shown in the illustration to the left and right of the structural gap 2. The joint edge profiles 4 and the clamping profiles 9 serve to clamp two elastic sealing strips 10 arranged laterally on the center beam 5. These prevent the penetration of dirt and moisture into the structural gap 2.

[0055] The center beam 5 is slidingly mounted in the bridging device 1 with its profile foot 8 on several bearing elements 24 arranged below it. These are made of a low-friction sliding material and are attached to two U-shaped edge plates 25 arranged to the left and right of the structural gap 2 in the respective structural elements 3. To ensure that the center beam 5 is always as centered as possible within the structural gap 2, the bridging device 1 further comprises several control elements 26 on both sides of the profile web 7. These serve to move the center beam 5 back into the initial position after a lateral deflection of at least one of the two structural parts 3. They are each made of an elastic material and are each attached to the upper side of the profile foot 8 and under a horizontal leg of the U-shaped edge plate 25 projecting into the structural gap 2 from each side.

[0056] Fig. 3 shows a section through a second embodiment of a bridging device 1 according to the invention. As can be seen in particular from the spatial representation in Fig. 4 and also from the Figs. 6 and 7, the profile head 6 of the center beam 5 is formed undulating in the top view, in contrast to the first embodiment. As in the first embodiment example, the profile foot 8 is significantly wider than the profile head 6 and is rectangular in the top view. Thus, also in this embodiment, an underlying cross beam for supporting the center beam 5 in the bridging device 1 can be dispensed with.

[0057] From the top view on the profile head 6 of the center beam 5 shown in Fig. 6, it is easy to see that it comprises an unusual undulating shape. In the top view, the width of the center beam 5 is at least partially garland-shaped as a repeated sequence of narrower and wider sections in the longitudinal direction of the center beam 5.

[0058] As can be seen from Fig. 6, the undulating course of both outer longitudinal sides 11 of the profile head 6 of the center beam 5 is designed in such a way that at least one wave 12 with a wave crest 13 and a wave trough 14 is formed. The radius of curvature (R1) of the wave crest 13 is smaller than the radius of curvature (R2) of the wave trough 14. The radii of curvature R1 and R2 are represented here by symbolic arrows which are not themselves part of the device and have been drawn in here only for illustration purposes of the radius of curvature. Furthermore, these are curvatures with the radius of curvature R1 , R2 kept as constant as possible in each case. They are thus sections 15, 16 curved in the shape of arcs of circles, between each of which a section 17 of the respective clamping profile 9, which is straight in the top view, is arranged.

[0059] As can be clearly seen from the sectional view in Fig. 5 and, above all, from the top view in Fig. 3, the profile head 6 and profile web 7 in this embodiment are designed in such a way that their respective outer longitudinal sides 11 and 18, which are one above the other in relation to the profile cross section, each comprise the same undulating course of width. Therefore, only a single line is seen in the top view. However, this congruent course of the outer longitudinal sides 11 and 18 of profile head 6 and profile web 7 is not mandatory.

[0060] Another noteworthy feature of the second embodiment is that the cross section of the profile web 7 is formed very solid, as can be seen clearly in Fig. 3 and Fig. 5. Specifically, it is a component of a rectangular cross section made of steel. This solid profile web 7 results in a particularly rigid design of the center beam 5.

[0061] As can be seen from the two top views in Fig. 6 and Fig. 7, the two opposing longitudinal sides 11 of the profile head 6 each have an undulating design and are arranged offset from one another in such a way that a wave crest 13 in one longitudinal side 11 is associated with a wave trough 14 in the opposite longitudinal side 11 of the profile head 6. This design results in the profile head 6, and thus the center beam 5, having a width that varies in the course in the longitudinal direction in the top view. It becomes narrower and thicker again and this several times.

[0062] As can be seen from Fig. 7, also the outer longitudinal sides 20 of the two joint edge profiles 4 facing the structural gap 2 or the center beam 5 each comprise an undulating course. Here, too, the same radii of curvature R1 and R2 are used, with straight sections 17 also being present between the corresponding curved sections 15 and 16. Ideally, then, the undulating courses of the respective longitudinal outer sides of the profile sections of the center beam 5 and of the adjacent joint edge profiles 4 can be matched to each other in such a way that they complement each other perfectly in the top view, as can be seen in Fig. 7. This ensures that the bridging device 1 can be pushed together extremely tightly. In the fully pushed-together state of the bridging device 1 , its two joint edge profiles 4 can then nestle along the outer longitudinal sides 11 of the two clamping profiles 9, as this is shown in Fig. 8c.

[0063] The advantage of a similar design of the courses of the longitudinal sides of the joint edge profiles 4 and also of those of the clamping profiles 9 of the profile head 6 is that it is possible to produce both single-profile and multi-profile bridging devices in the form of a wave with relatively little manufacturing effort. Thus, one can assemble such a garland-shaped course from modularly prefabricated clamping profile segments by welding together the respective previously bent clamping profile segments. Since the respective radii of curvature of joint edge profile 4 and clamping profile 9 are the same, a plurality of segments bent with radius of curvature R1 as wave crests and a plurality of segments bent with radius of curvature R2 as wave troughs concavely can ultimately be prefabricated and used both for manufacturing a joint edge profile 4 and for manufacturing a clamping profile 9 of the profile head 6 of a center beam 5.

[0064] The initial profiles used here to manufacture the clamping profiles 9 and joint edge profiles 4 formed according to the invention are profiles used by the applicant to manufacture joint edge profiles.

[0065] In Fig. 8a to Fig. 8c, the principle operation of the bridging device 1 will now be explained in more detail on the basis of a section through the second embodiment example shown in three different situations. This functions in principle in the same way in both embodiment examples shown here. Fig. 8a shows an initial position in which the center beam 5 is in a central position within the structural gap 2. If the structural gap opens as shown in Fig. 8b or closes as shown in Fig. 8c, the center beam 5 slides with its profile foot 8 on bearing elements 24 arranged below it. These are made of a sliding material with low friction and are attached to two edge plates 25 arranged to the left and right of the structural gap 2 in the respective structural elements 3.

[0066] In order to ensure that the center beam 5 is always located as centrally as possible within the structural gap 2, the bridging device 1 also comprises at least one control element 26, as already mentioned above. This serves to bring the center beam 5 back into the initial position after a lateral deflection of at least one of the two structural parts 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. In contrast to the first embodiment example, the edge plate 25 is here not U-shaped but L-shaped. A further cantilever plate 27 then sits on top of it, projecting into the structural gap 2 from each side. These two cantilever plates 27 thus each sit on the upwardly projecting leg of the underlying L-shaped edge plate 25.

[0067] The third embodiment shown in Fig. 9 is an embodiment in which the center beam 5 and also the rest of the bridging device 1 , which is not shown further, is designed essentially exactly as in the second embodiment. Only here, the two clamping profiles 9 of the profile head 6 of the center beam 5 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 center beam 5, the width of which strip comprise a garland-shaped course and which seals and stabilizes the profile head 5 at the top.

[0068] The fourth embodiment of a bridging device 1 according to the invention shown in Fig. 10 is also one which differs from that of the second and third embodiments only in the configuration of the center beam 5. Only here, the profile head 6 is clearly more solid and the profile web 7 is clearly more slender. Thus, the two clamping profiles 9 of the profile head 6 of the center beam 5 are less high and are connected along the entire height on their inner sides by means of a connecting part 21 . This relatively solid connecting part 21 is thus designed as high as the two clamping profiles 9.

[0069] A further aspect of this fourth embodiment is that the entire, very rigidly designed profile head 6 is now supported by a significantly more slender profile web 7 compared with the second or third embodiment. This can be made - as shown here - from a relatively thin and inexpensive flat steel. Its central axis can then have an undulating course below the central axis of the profile head 6. Indeed, the use of an easily bendable flat steel has the advantage that its contribution to the stiffening of the center beam 5 can be very easily adapted to different load situations. Thus, both the web height and the number of waves in the profile web 7 can be changed very easily. List of reference signs

[0070] 1. Bridging device

[0071] 2. Construction gap

[0072] 3. Building part

[0073] 4. Joint edge profile

[0074] 5. Center beam

[0075] 6. Profile head

[0076] 7. Profile bar

[0077] 8. Profile foot

[0078] 9. Clamping profile

[0079] 10. Sealing strip

[0080] 11 . Long side of the profile head

[0081] 12. Wave

[0082] 13. Wave crest

[0083] 14. Wave through

[0084] 15. curved section with radius of curvature R1

[0085] 16. curved section with radius of curvature R2

[0086] 17. Straight section

[0087] 18. Long side of the profile bar

[0088] 19. Long side of the profile foot

[0089] 20. Long side of the joint edge profile

[0090] 21. Connecting part

[0091] 22. Traverse

[0092] 23. Traverse box

[0093] 24. Bearing element

[0094] 25. Edge plate

[0095] 26. Control element

[0096] 27. Cantilever plate

[0097] R1 Radius of curvature of the wave crest

[0098] R2 Radius of curvature of the wave through

Claims

Claims1 . Bridging device (1) for a structural gap (2) between two structural elements (3), which comprises two joint edge profiles (4) and a center beam (5), the center beam (5) extending in a longitudinal direction between the joint edge profiles (4), being held in the bridging device (1) so as to be displaceable transversely thereto and having a profile cross section 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 foot (8), and the profile head (6) comprises clamping profiles (9) on both sides for clampingly holding two elastic sealing strips (10) arranged laterally on the center beam (5), characterized in that the profile foot (8) is formed significantly wider in the top view than the profile head (6) at its widest point.

2. Bridging device according to claim 1 , characterized in that the profile foot (8) is at least 1 .5 times, preferably 2 to 4 times, as wide as the profile head (6) at its widest point in the top view.

3. Bridging device according to any one of the preceding claims, characterized in that the profile foot (8) is designed to be wider than a maximum width of the structural gap (3), at least in some areas.

4. Bridging device according to any one of the preceding claims, characterized in that the profile foot (8) is designed as an elongated and flat plate, preferably as a strip of a sheet metal.

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

6. Bridging device according to any one of the preceding claims, characterized in that the profile foot (8) of the center beam (5) is displaceably supported on at least one bearingelement (24) in the bridging device (1).

7. Bridging device according to any one of the preceding claims, characterized in that a plurality of bearing elements (24) for the profile foot (8) of the center beam (5) are fastened to two, preferably U- or L-shaped, edge plates (25) arranged on the left and right of the structural gap (2).

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

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

10. Bridging device according to any one of the preceding claims, characterized in that at least one control element (26) is fastened underneath a part of the edge plate (25) projecting horizontally and from the side into the structural gap (2) or a cantilever plate (27) arranged thereon and laterally covers the profile foot (8), lying underneath, of the adjacent center beam (5) at the edge.11 . Bridging device according to any one of the preceding claims, characterized in that the profile head (6) has a constant course of its width in the longitudinal direction of the center beam (1) in the top view.

12. A bridging device according to any one of the preceding claims 1 to 10, characterized in that the profile head (6) comprises, in the top view, an at least undulating course of its width at least in some areas, preferably a garland-shaped course of its width as a repeated sequence of narrower and wider points in the longitudinal direction of the center beam (1).

13. Bridging device according to claim 12, characterized in that the profile head (6) comprises, in the top view, two outer longitudinal sides (11) each havingan undulating course, the undulating courses of the two longitudinal sides (11) being designed in such a way that they each have at least one wave (12) with a wave crest (13) and a wave trough (14), and the width of the profile head (6) is greater in the region of the vertices of the wave crest (13) and of the wave trough (14) than in an section between the vertices of the wave crest (13) and wave trough (14).

14. Bridging device according to any one of the preceding claims, characterized in that the course of the two outer longitudinal sides (11) of the profile head (6) are each adapted to the course of an outer longitudinal side (20) of a joint edge profile (4) adjacent thereto in such a way that the adjacent longitudinal sides (11 , 20) extend parallel to one another and can fit against one another in the pushed-together state of the bridging device (1).

15. Bridging device according to any one of the preceding claims, characterized in that the 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 regionally constant radius of curvature (R).

16. Bridging device according to any one of the preceding claims, characterized in that the undulating course of at least one outer longitudinal side (11 , 20) of the profile head (6) and / or of the joint edge profile (4) has, between two curved sections (15, 16), a section (17) which is straight in a top view.

17. Bridging device according to any one of the preceding claims, characterized in that the profile cross section of the center beam (5) is designed in such a way that a profile web (7) is arranged between the profile head (6) and the profile foot (8).

18. Bridging device according to claim 17, characterized in that the profile web (7) is designed as a sheet metal strip which is straight in the top view and / or undulating at least in some areas.

19. Bridging device according to any one of the preceding claims 17 to 18, characterized in thatthe profile web (7) is designed as a solid component which is rectangular in the cross section, its longitudinal sides (18) each have an undulating profile in the top view.

20. Bridging device according to any one of claims 17 to 19, characterized in that the profile web (7) is designed as a thin bent part which is rectangular in the cross section and vertically arranged and which, in the top view, comprises an undulating profile at least in some areas.21 . Bridging device according to any one of claims 17 to 20, characterized in that the longitudinal side (18) of the profile web (7) comprises, in the top view, more or fewer and / or more strongly or more lightly curved waves (12) in the longitudinal direction of the center beam (5) than the longitudinal side (11) of the profile head (6).

22. Bridging device according to any one of the preceding claims, characterized in that at least one joint edge profile (4) and / or a clamping profile (9) consists of a continuously cast profile, rolled profile, casting and / or a hybrid profile composed of several types of metal.

23. Bridging device according to any one of the preceding claims, characterized in that the profile head (6) of the center beam (5) comprises two, preferably at least partially prefabricated, clamping profiles (9).

24. Bridging device according to claim 23, characterized in that the two clamping profiles (9) are connected to each other directly or by means of a connecting part (21).

25. Bridging device according to claim 24, characterized in that the connecting part (21) is a sheet metal strip placed between and / or on the two clamping profiles (9) of the center beam (5).

26. Bridging device according to any one of claims 23 to 25, characterized in that the profile head (6) comprises a cavity extending between the two clamping profiles (9) and under the connecting part (21).

27. Bridging device according to any one of claims 1 to 25, characterized in that the profile head (6) is designed as a solid part, preferably with a sheet metal strip (21) extending over the entire height of the two clamping profiles (9).

28. Bridging device according to any one of claims 1 to 27, characterized in that a profile head (6) designed as a solid part is fastened to a thin profile web (7), preferably designed as a bent part.

29. Bridging device according to any one of the preceding claims 1 to 27, characterized in that a hollow profile head (6) is fastened to a thick profile web (7) and / or profile foot (8), preferably designed as a solid flame-cut part.

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