Bridges – Transportable
Patent
1991-05-02
1993-01-19
Britts, Ramon S.
Bridges
Transportable
296 377, E01D 1512, E01D 2100
Patent
active
051797518
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE SPECIFICATION
The invention relates to a vehicle for laying dismountable bridges, of the type provided with a laying device for displacing and laying a bridge which can be assembled on the vehicle. Such a vehicle is provided, at a longitudinally opposite end of the vehicle, with a pick-up device for supporting a bridge section at the same height at which the laying device supports bridge sections, so as to permit coupling of the bridge sections.
This type of vehicle is disclosed in German Laid-Open Application DE-OS 29 29 208. This vehicle is provided at its forward end with a laying device for moving and laying a bridge which is assembled on the vehicle, and at its tail end it is provided with a pick-up device configured as a pivotable arm, which picks up a section or component of the bridge from a bridge transport vehicle and attaches it to the bridge components which have already been assembled. In order for the just advanced bridge component not to have to be moved forward in alignment with the already assembled bridge components, the pick-up device is provided with a slewing ring which is supported on the vehicle. For coupling the advanced bridge section to the one preceding it, the pick-up device is also arranged so as to be longitudinally displaceable on the vehicle. The number of bridge sections that determine the length of the bridge and can be coupled together with the known vehicle is limited because the assembled bridge sections, which project on one side of the vehicle relatively rapidly produce a tipping moment which exceeds the standing moment of the vehicle.
SUMMARY OF THE INVENTION
It is the object of the invention to configure a vehicle of the type mentioned above, which makes it possible to assemble a significantly longer bridge. The solution of this problem is to design the pick-up device and space it from the laying device so that it is able to take hold of at least one of the bridge sections which form the bridge in a coupled state and displace them relative to the pick-up device in the longitudinal direction of the vehicle a distance which permits at least one bridge section to be inserted between the bridge sections held by the laying device and the bridge sections held by the pick-up device.
Due to the novel configuration of the vehicle, the construction of significantly longer bridges is achieved without the vehicle having to be made heavier or having to be equipped with special supporting devices. A nearly symmetric assembly of the bridge is made possible starting from the center of the vehicle so that during assembly a tipping moment about the center of the vehicle can be totally eliminated or at least be kept to a minimum.
Under normal circumstances the vehicle is equipped with a drive and it may be a track-laying vehicle or wheeled vehicle, and special designs may be considered such as, for example, the motor vehicle provided with a sliding frame according to European Patent Application EP-OS 00 93 873.
In addition, the vehicle serves, preferably simultaneously, in a known manner, for transporting bridge components, with the two ramp sections of a dismountable fixed bridge being of primary interest. These sections then form the shortest bridge unit, which, if required, may be elongated as desired within the scope of the carrying capacity of the vehicle by means of further insertable bridge sections.
Transportation of still more bridge sections on the vehicle depends, above all, on the respectively possible and permissible exterior dimensions. For bridges having uniformly long bridge sections, these sections generally have a length from 6 to 8 m, so that the distance between the laying device and the pick-up device is selected accordingly.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention are shown schematically in the drawing figures and are described below in greater detail with reference thereto:
FIG. 1, a front view of a vehicle according to the invention provided with a chain drive;
FIGS. 2-4, sectional views respectively along lines I
REFERENCES:
patent: 4493122 (1985-01-01), Echtler et al.
Britts Ramon S.
Connolly Nancy P.
Krupp Industrietechnik GmbH
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