Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1994-05-16
1996-04-02
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405272, 405283, E02D 500
Patent
active
055035043
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a sheeting device having large-size sheeting panels arranged in pairs mutally facing each other supported against vertical supports which are positioned in pairs mutually facing each other and which are held in spaced-apart relationship by at least one spreader frame, the side walls of the supports having legs bent in parallel to the base wall, lying opposite to each other and leaving a broad gap between them, and the spreader frame in the gaps of mutually opposing supports being guided in a vertically movable manner with positive fit in the horizontal direction by means of rollers transmitting pressure forces of the spreader frame and running on the base wall of the supports and by means of rollers transmitting traction forces of the spreader frame and running on the inner sides of the two legs of a support.
Sheeting devices of this kind are known from the German Utility Model No. 74 35 632.
2. Discussion of the Prior Art
In the known sheeting devices the rollers transmitting pressure forces are located on axles positioned between the upper and the lower cross strut of the supporting frame at the left and right vertical strut of the supporting frame. The rollers transmitting tractive forces of the brace framing are located on the level of the upper and lower cross strut of the supporting frame at the right and left vertical strut of the supporting frame.
The vertically staggered arrangement of the rollers transmitting the pressure forces and those transmitting the traction forces results in high installation expenditure and greater requirements of material. In addition, arranging the pressure force-transmission rollers between the traction-transmission rollers is unfavourable since this results in the spreader frames being guided in the supports in an unsatisfactory manner.
It is the object of the present invention to provide a sheeting device ensuring a reliable guidance of the spreader frame in the supports of the sheeting device at a lower expenditure of installation work and material.
SUMMARY OF THE INVENTION
According to the present invention this object is achieved by the fact that the pressure forces-transmitting rollers and the traction forces-transmitting rollers are located on common axles, with the rollers transmitting the pressure forces being located within the gap between the legs of a support and having a diameter that is larger than the distance of said legs from the base wall of the support, and the rollers transmitting the traction forces having a smaller diameter and being located at the outwardly directed sides of the pressure forces-transmitting rollers.
The sheeting device construction according to the present invention has the advantage that only two axles, with the rollers transmitting the pressure forces and those transmitting the tractive forces arranged thereon, have to the provided at each lateral vertical strut of the expanding frame. The distance between the upper and the lower rollers of the spreader framing may be as large as possible so as to ensure an optimum guidance of the spreader framings in the supports.
Further features result from subclaims 2 to 8.
With reference to the accompanying drawings an embodiment of the present invention will be described in more detail in the following; the drawings show in
FIG. 1 a side view of the sheeting device according to the present invention and
FIG. 2 a view along line II--II of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to FIG. 1 the sheeting device for supporting the substantially vertical walls of an excavated trench consists of large-size sheeting panels 2 and 4 which are arranged in pairs mutally facing each other, these are supported by vertical supports 1 and 3 arranged in pairs opposing each other. The supports 1 and 3 of the sheeting device are spaced apart by at least one spreader frame 5. Said spreader framing 5 is built up of an upper cross strut 6, a lower cross strut 7, a left vertical strut 8, and a right v
REFERENCES:
patent: 3530679 (1970-09-01), Krings
patent: 3621660 (1971-11-01), Krings
patent: 4376599 (1983-03-01), Krings
patent: 5310289 (1994-05-01), Hess
Hess Wilhelm
Kuppers Josef
Emunds and Staudinger GmbH
Hildebrand Christa
Taylor Dennis L.
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