DE2065318A1 - COVER DEVICE FOR EXPANSION JOINTS - Google Patents

Description

br. Friedrich HadenfeW! <£ OrFrHans Daube ^ wt

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HELKA S »A, Friborg / Switzerland

Covering device for expansion joints

The invention relates to the formation of a covering device for Expansion joints in bridges and other structures with an elastically flexible, strip-shaped joint insert made of rubber or a another, preferably synthetic elastomer with a cross section in the form of a flat trapezoid, with the small base side down, into which metal edge profile supports for anchoring the Long sides are partially embedded and which has humps on their underside, to which metal stiffeners are screwed. '

Such a design is known, the stiffeners wide, profiled metal rails are made »that fit into the humps recessed metal disks are screwed on. ' The two longitudinal edge areas these metal rails are angled against the joint strips and engage with their longitudinal edges in groove-like recesses along the metal rail edges. ' Here it is However, it was found that with very strong compression the strip-shaped Joint insert a bulge can occur and then a wave-shaped elevation is formed over the expansion joint. "Also

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hinder this type of metal stiffeners seemed to be flawless Adaptation to any unevenness when laying as well as a space-saving winding, storage and transport of the strip-shaped Joint insert. '

The purpose and object of the invention is to avoid these disadvantages and the creation of a possibility by simply changing the shape and arrangement of these metallic stiffeners of the strip-shaped Joint insert a greater elasticity in the transverse direction and to give better flexibility in the longitudinal direction »

For this purpose, a cover device for expansion joints is now the one at the beginning mentioned type according to the invention characterized by the arrangement of each stiffener in one of at least two deep longitudinal grooves with a right-angled cross-section on the underside of the strip. '

Expediently, stiffeners in the form of cuboidal metal blocks with their longitudinal edges resting against the vertical inner sides of the longitudinal groove when the strips are not deformed, which are provided with a central recess for receiving the humps, are expediently used.

The height of these metal blocks corresponds in a preferred embodiment sform approximately the axial length of the humps, with one on the top of the metal block and the The washer on top of the hump can be used, through whose central hole a simple wood screw is axially inserted into the hump is screwed. '

In the accompanying drawing is an example and preferred one Embodiment of the covering device designed according to the invention shown in a vertical cross-section in side view. '

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In the illustrated application of the covering device are the The bridge part 1 and the pillar 2 are separated from one another by the expansion joint 3 and are provided with support plates 4 fixedly arranged thereon.

These support plates 4 are by anchoring iron 5 in the concrete mass embedded and provided with a through-hole for receiving a fastening bolt 6, "The heads of these fastening bolts are square and are secured against rotation by a stop 18 welded to the plate 4.

The tensile "and compressive elastic strip 7 made of rubber or another, preferably synthetic elastomer is held by these bolts 6 on the plates 5, namely by means of metallic edge profiles 8, which are partially embedded in the strip mass 7. These edge profiles 8 form an integral part of the strip 7 and are connected to one another by means of angle profiles 9, which are attached from the outside and have an approximately L-shaped profile. To make things easier the attachment of the stud screw 12 and its tightening on the fastening bolt 6, especially if this involves bolts and screws have to find use with larger dimensions, the angle profiles 9 are provided with openings 11 that are in the amount of Nuts 12 are arranged and extend to the lower edge of the vertical leg of profiles 9 extend. "

Longitudinal grooves 17 are also provided on the underside of the strip, with which it rests directly on the structural parts to be connected. When making the strip of rubber or a Another, preferably synthetic elastomer are furthermore cylindrical humps at certain intervals within these longitudinal grooves 17 13 arranged, which at the bottom of the longitudinal grooves 17 and in the middle are processed.

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After the strip material has been vulcanized, according to the invention around these bumps 13 metallic stiffeners in the form of metal blocks 14 placed, which are cuboid and have approximately the same width as the longitudinal grooves 17. ' The central recess the dimensions of these metal blocks correspond approximately to the cross-section the hump 13, however, can also be somewhat larger. ' In any Fall is caused by a lateral expansion of the hump 13 during the Tightening the screw 15 prevents any mechanical play between the reinforcement 14 and the hump.

In the embodiment shown in the drawing, where the height of the metal blocks 14 corresponds to the axial length of the humps 13, can fix the metal blocks in a simple "using" way one at a time on the tops of the metal block and of the hump resting washer 16, through the central bore of which a wood screw 15 is screwed axially into the hump. '

Of course, this washer can also be omitted if the fastening screw has a head with a sufficiently large diameter to be simultaneously on the upper sides of the metal block and hang up the hump. '

In this simple way, the narrower metal stiffeners a significant increase in the transverse elasticity of the joint strip achieved and given the shorter sections of the metal blocks this at the same time a better longitudinal flexibility, so that the disadvantages of a known embodiment mentioned at the beginning Safety does not occur, 'when squeezing the strip namely, prevent the metal blocks 14 not only from lifting and bulging the strip upwards, but also direct its deformation the cavities of the longitudinal grooves 17 without being on top of the A deformation occurs on the outside of the strip. ' Furthermore, the better stability and higher resistance of the inventively designed

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formed covering device their application also in the form of larger serer Plates for covering larger openings with simultaneous free stretchability of the mass surrounding the opening in question. '

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Claims (1)

- 6 'PATENT CLAIMS: .7 Covering device for expansion joints in bridges and other structures with an elastically flexible, strip-shaped joint insert made of rubber or another ^ preferably synthetic elastomer with a cross-section in the form of a flat trapezoid, with the small base side down, into which metal edge profile girders for anchoring the long sides are partially embedded and which has bumps on their underside, ρ to which metal stiffeners are screwed, marked by the arrangement,. each stiffener (14) in each one of at least two deep longitudinal grooves (17) with a right-angled cross-section on the underside of the strip. ' 2. ' Device according to Claim 1, characterized by stiffeners in the form of cuboid, with undeformed strips (7) with their longitudinal edges on the vertical inner sides of the longitudinal groove (17) adjoining metal blocks (14) with a central recess for receiving the hump (13). ψ 3. ' Device according to claim 2, characterized by one of the axial Length of the humps (13) corresponding to the height of the metal blocks (14). 4. ' Device according to claim 2 and 3, characterized by a the top of the metal block (14) and the hump (13) at the same time resting washer (16), through their central hole a wood screw (15) is screwed axially into the hump. 309813/0 370