CS207743B2 - Closing plate as reducing construction on the bridges or similar constructions - Google Patents

Abstract

The roadway crossover unit incorporates a sealing plate anchored in the joint edges on both sides. This is made of resilient material which is insentive to temp. with stiffening inlays vulcanised in and top and bottom expansion grooves. A harder covering layer of non-wearing, heat and oil-resistant plastics or rubber is provided. The edge pieces of the plate (1), anchored in the joint edges, are shaped to be offset upwards relative to the plate centre (2) covering the joint, depending on joint width. This enables the unstable centre part to be firmly held on its underlay, whether the joint is open or closed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a closure plate as a transition structure on bridges or similar load-bearing structures of resilient, temperature-insensitive material with vulcanized reinforcement inserts and expansion grooves on the upper and lower side and ole i.

Flexible closure plates as transition structures on bridges or similar load-bearing structures with expansion grooves on the top and bottom are known, as is evident, for example, from German Patent No. 1,534,262. These closure plates are mounted in gaps with the road surface and recess between adjacent concrete fields. These closure plates are fastened by edge portions in the recesses of the substructure. Their central part, which covers the joint, has some instability with respect to the expansion grooves arranged between the fastening rows. It is known that vehicle wheels that roll after road transitions exert a speed-dependent suction force on the closure plate. The application of this suction force can cause the unstable middle part to be lifted at a certain joint width. As soon as the wheel has passed over the closure plate, its central part hits the bed with considerable noise. In order to prevent the generation of this noise, it is known to retain the middle part of the closure plate in the lower position by leaf or tension springs made of steel or rubber. Modifying these springs, however, is very costly and their maintenance in tight joints is almost impossible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a closure plate of the type described in the preamble in which its unstable central portion is held firmly on the substrate in each position, i.e. both open and closed.

The object of the present invention is to provide a closure plate according to the invention in which its edge portions, in which the connecting means for the supports are provided, are formed offset by a value dependent on the width of the joint with respect to the middle portion.

In the installation of the closure plate according to the invention, the edge portions are firmly fixed to the substrate by means of screws, fastening anchors or other suitable fasteners, and the offset must be overcome. This is the main advantage of the invention, since this gives the closure plate a preload which firmly presses the central part onto the substrate. Since the preload force is greater than half of the maximum suction force generated on each side, the lift plate uza207743 will not be lifted at all times regardless of whether the closure plate is stretched or compressed.

The invention is explained in more detail below by way of example with reference to the drawing.

FIG. 1 schematically illustrates a closure plate of a known embodiment, showing the effect of the suction force by the rolling wheel.

Fig. 2 shows a closure plate according to the invention in cross-section with the edge portions offset upwards.

Fig. 3 shows a closure plate according to the invention inserted into a roadway crossing prior to prestressing of the edge sections.

Fig. 4 shows a closure plate according to the invention built into the roadway.

According to FIG. 1, the closure plate 1 is arranged in recesses of adjacent concrete fields 10, 11 which are separated from one another by a gap 12.

Claims (4)

SUBJECT Closing plate as a transitional structure on bridges or similar structures made of a resilient, temperature-insensitive material with vulcanized reinforcement inserts and expansion grooves on the top and bottom and with a harder road surface of plastic or rubber The rolling wheel 20 creates a suction force S which lifts the unstable middle part 2. In FIG. 2, the closure plate 1 is shown in cross-section as it comes as a product. The middle portion 2 has its final form, while the edge portions 3 are offset by an x value relative to the middle portion 2. According to FIG. 3, the closure plate 1 is inserted into the recesses of the concrete fields 10, 11. In order to equalize the suction force S and to achieve binding with the road surface, each of the edge portions 3 is biased by at least half the suction force S. According to FIG. 4, the closing plate 1 is completely mounted. The edge portions 3 are anchored by fastening screws 4 in the recesses of the concrete fields 10, 11, whereby the central part 2, which covers the gap 12, is pressed firmly onto the support. Wear, heat and oil resistant, characterized in that its edge portions (3), in which the attachment means for the supports are provided, are offset by an offset (x) relative to the central portion (2) overlapping the gap (12). ) depending on the joint width (12).