Railways: surface track – Stringers – Metallic
Patent
1995-06-15
1997-02-25
Le, Mark T.
Railways: surface track
Stringers
Metallic
238 1, 238 2, 238121, 104124, E01B 300
Patent
active
056052812
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a support system for a rail between two foundations including sleepers moveable relative to one another and for fixing said rail, in particular for a rail section of an expansion joint in the area of a bridge joint.
Expansion joints are used to permit relative movement between structure and track, in an area of a track superstructure, for example in the vicinity of bridges. These expansion joints comprise tongue and stock rail that are moveable relative to one another. To this end, a tongue can be fixed between the stock rail at one side and a clamping jaw can be stationarily disposed on the opposite side.
In the area of the joint, support of the rail often absent, so that when the joint is relatively wide undesirable bending of the rail results when the track is traversed.
OBJECTS OF THE INVENTION
The object underlying the present invention is to further develop a support system for a stock rail and for fixing the rail between foundations including sleepers where the foundations are moveable relative to one another, in particular for a rail section of an expansion joint in the vicinity of a bridge joint. To avoid undesired bending of the stock rail, so that track-like conditions prevail in the area between the foundations which are moveable relative to one another. In addition, an equalization of the support should be achieved by simple design means, regardless of the size of the distance between the foundations.
The problem is substantially solved in accordance with the invention in that supporting elements extending from the foundation run parallel to the stock rail and on both sides thereof, so that at least one support element which runs along the stock rail is designed to be moveable in the longitudinal direction which is defined by the supporting elements and the stock rail.
SUMMARY OF THE INVENTION
The purpose of the invention is the prevention of rail bending which can occur in the area between foundations which are moveable relative to one another, and in particular in the area of a bridge joint. In accordance with the invention, the stock rail is underpinned by braces of preferably plate-like design such that when the stock rail is traversed no undesirable bending occurs. To this end, the plate-like braces are held in position by supporting elements, preferably in the form of supporting rails, designated as auxiliary rails, which in their turn are fixed on railroad ties such as sleepers on which the stock rail is supported.
The result is practically a stiffening of the stock rail in the area of the bridge joint as a result of the fact that the rail foot of the stock rests on at least one support plate which in turn extends from supporting rails arranged on both sides of the stock rail and in its longitudinal direction.
At least two plate-like supports or braces are preferably provided which are designed relatively moveable both to the stock rail, the supporting rails and to one another. The result is a movement along the supporting rails and the stock rail such that an equalization of the distances between rail supports is achieved in the area of the bridge joint. To that end, drivers or limiters in the form of cams or shears extend from the auxiliary rails or rail on the one hand, and from the support(s) on the other hand. The cams or shears move or fix the supports during movement of the supporting rails and the stock rail depending on their position.
In a further embodiment of the invention, the supporting elements such as supporting rails are connected stationarily with one of the foundations such as sleepers which are moveable relative to one another, such that a displacement relative to the other foundation can take place in the event of a relative movement between structure and track. By contrast, the stock rail is more firmly connected to that foundation with which the supporting rail is not stationarily connected than to the other foundation.
Further details, advantages and features of the invention are clear not only from the
REFERENCES:
patent: 429470 (1890-06-01), McGiehan
patent: 564854 (1896-07-01), Toal
patent: 999644 (1911-08-01), Gooch
patent: 1232191 (1917-07-01), Bohannan
patent: 2153624 (1939-04-01), Jones
patent: 2669394 (1954-02-01), Poebing
patent: 2708072 (1955-05-01), Dalton
Benenowski Sebastian
Hohne Hubertus
Kais Alfred
Nuding Erich
BWG Butzbacher Weichenbau GmbH
Le Mark T.
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