DE8104818U1 - "ELASTOMERIC POT BEARING FOR CONSTRUCTIONS" - Google Patents

Description

PATENTANWÄLTE, .... »: ......; DIETRICH LEWiNSiKY ■:. ': ·:':. · ' HirlNZ-JOACHlMhU'ÖER / " PURE PRIETSCH MÖNCHEN 21 March 31st 1982 GOTTHARDSTR. 81 13.466-l / Ni I

G 81 04 8I8.I

Vorspann-Technik GmbH, Am Sandbach 5, 4030 Ratingen

Elastomeric pot bearing for buildings

The invention relates to an elastomeric pot bearing for buildings, in particular bridges, with a pot and a cover engaging in it and an elastomer disc enclosed between them and forming the deformable part of the bearing when it is stressed. Such pot bearings are known to the receiving of the vertical superimposed load, such as a bridge _s recording of rotations of the bearing point, of horizontal displacements and horizontal forces if the bearing is designed as a fixed point of the retaining structure such as a bridge.

So far known pot bearings of this type consist of a cylinder pot with a cover. In The cylinder pot is a circular elastomer disc, which is the deformable part of the Camp. When the pot bearing is stressed by the weight of the bridge, it pushes Cover the elastomer washer, which cannot escape because it is trapped in the pot is. A state of tension arises in the elastomer disk, similar to that an enclosed liquid. at

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Stress caused by twisting the support point of the bridge is deformed the elastomer washer is wedge-shaped by making one half wedge-shaped thicker and the half wedge-shaped other half becomes wedge-shaped thinner. Also on the twist is the model of the included Liquid transferable. However, this mode of operation is only possible if it is guaranteed that on Washer edge does not put the elastomer into the gap between the inner wall of the cylinder pot and the lid is pressed. On the model of the enclosed liquid, this means that the cover is on the pressure cylinder The twist to be absorbed, however, requires a minimum width the gap between the cover and the cylinder pot.

This problem has been encountered so far with the help of sealing tapes in the edge area of the Elastomer washer are inserted, attempts to loosen. There will be different variants used by sealing tapes such as metal or plastic tapes, tapes with rectangular or angular cross-sections or ribbons as chains that consist of individual interconnected chain links exist. These sealing tapes however, they always remain a weak point in the pot bearing. Fail under high loads as first the sealing tapes. The edge of the disc grinds, especially with repeated twisting along the cylinder wall and is in

trapped in the gap between cylinder wall and cover and destroyed.

The invention is based on the object of providing an elastomeric pot bearing as defined at the outset Kind of design so that the inserted elastomer disc does not get caught in the gap between the pot wall and the lid and their functionality can be destroyed or otherwise impaired.

This task is with such an elastomer Pot bearing achieved according to the invention in that the elastomer disc on both sides each connected to a steel plate by vulcanization and thus as a reinforced elastomer bearing is formed whose steel plates on both sides protrude beyond the edge of the elastomer layer adjoining them. Because of With this training, the elastomer layer cannot enter the gap between the inner wall of the pot and cover penetrate. This is prevented to an even greater extent in that the freely rotating end faces of the elastomer layer are concave. Here the reinforced elastomer bearing can be single-layered or, for larger rotations, also multilayered | be trained. $ ■

It is true that an elastomeric pot bearing f _s is already known (DE-OS 1 806 628), in which the elastomer layer is backward from the pot and lid

is offset. Due to this measure, however, the bearing is under high load no reliable guarantee given that no elastomer in the gap between the pot and Cover can penetrate. In addition, the elastomer cushion is not included in this pot bearing Equipped with steel plates vulcanized on both sides.

Also with a further known rubber bearing ("Der Bauingenieur", 39 (1961), issue 2, Page 63 Fig. 29) the steel plates on both sides are not vulcanized with it, accordingly not part of it and therefore do not serve to reinforce it. Much more The two steel plates are part of the steel retaining structure there.

The steel plates of the reinforced elastomer bearing leave a pot bearing according to the invention a small gap to the wall of the pot, so that no twisting forces arise. By replacing the elastomer disc 'with a reinforced elastomer bearing with the Design features of the protruding steel plates and possibly concave end faces the problem of tightness is solved and thus the weak point of the previous embodiment eliminated, because the elastomer no longer comes into contact with the gap between the pot wall and the reinforcement plates

or cover and does not run the risk of being jammed in the gap. the The function of the enclosed liquid is also determined by the elastomer in this case Design retained, but it is enforced by the reinforcement plates and is not to rely on a complicated poetry.

When the bearing is loaded, the edge surface of the bearing bulges without the pot wall and to reach the gap between the pot wall and the steel plate. Only when the load is greater the bulge reaches the edge of the pot, which then avoids further bulging. It arises thus an additional edging of the elastomer at high loads without the Elastomer reaches the gap between the pot and the steel plate or cover and possibly is pinched here.

In the drawing, an elastomeric pot bearing of the type according to the invention is in an example chosen embodiment in one broken cross-section illustrated schematically. Show it:

Fig. 1 the pot bearing in the unloaded state and

Fig. 2 the pot bearing in a loaded state.

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The reinforced elastomer bearing used here for such an elastomer pot bearing is designed in such a way that the freely rotating end faces 1 of the elastomer disk 2 are concave and their steel plates 3 on both sides over the edge 4 of the elastomer layer 2 adjoining them protrude. This elastomer bearing formed in this way sits between the cylinder pot 5 and the cover 6 engaging in it. As long as this pot bearing is unloaded (FIG. 1), the circumferential end face 1 of the elastomer layer 2 retains its concave shape. If the bearing is now loaded (Fig. 2), the end face 1 of the elastomer layer 2 - starting from its starting position I ¹ - is gradually arched outwards until it - when the bearing is heavily loaded it is in its end position 1 ' comes to rest on the inner cylinder wall of the pot. Even if it is sufficient in most cases that the steel plates, namely the lower steel plate 3 protrudes beyond the edge k adjoining them, the elastomer layer 2 of the reinforced elastomer bearing to prevent penetration of elastomer material into the gap 7 between the pot 5 and To prevent cover 6, this is achieved all the more by the concave design of the freely rotating end faces 1 of the elastomer layer 2 of the elastomer bearing.

Claims (3)

Protection claims: 1. Elastomeric pot bearing for buildings, in particular bridges, with a pot and a cover that engages in it and an elastomer disk enclosed between them and forming the deformable part of the bearing when it is stressed, characterized in that the elastomer disk (2) is connected on both sides, each with a steel plate (3) by vulcanization, and is formed so as reinforced elastomeric bearing, protrude the two-sided steel plates (3) adjacent to them the edge ⁽¹ O of the elastomer layer (2). 2. Pot bearing according to claim 1, characterized in that the freely rotating end faces (1) the elastomer layer (2) are concave. 3. Pot bearing according to claim 1 or 2, characterized in that the reinforced elastomer bearing is formed in several layers.