Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1997-05-07
1999-03-23
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405272, 405273, E02D 1708
Patent
active
058850333
DESCRIPTION:
BRIEF SUMMARY
The invention relates to the housing in a trench lining plate for receiving the support shoe for a brace, which is intended to be resiliently fastened, of a pair of lining plates of a trench lining device (lining box), which are intended to be maintained at a distance by means of the brace, wherein the brace preferably is intended to be fastened in a receptacle of the support shoe with the aid of a brace holding bolt which is intended to be pushed through bores aligned transversely in respect to the longitudinal direction of the housing.
A support shoe housing of this type can be derived from DE 42 09 675 C1. The known housing, which there is embodied as a box-shaped pocket of the support shoe, does not project past the exterior surface of the lining plate which is to face the interior of the trench. Bolts or screws, which are situated inside the lining plate parallel with its exterior surfaces, are therefore required for fastening the support shoe and lastly the brace in the lining plate. For this reason recesses of the sheet metal cover plates of the lining plate are therefore required at at least two locations outside of the support shoe for the access to the "inner" bolts or screws. The combination of two tasks, namely fixing the support shoe in place and the pivotability in a bolt, however merely has the result that this bolt can only be mounted or removed through an opening in the body of the lining plate, for example a recess of a cover surface.
As the means for resiliently hinged fastening of the brace with the aid of the support shoe in a trench lining plate, it is proposed in the not previously published German Patent Application P 43 41 626.8 to seat the brace receivers respectively on a pair of helical pressure springs which are positioned next to each other on both sides of the brace holding bolt. Fastening of the support shoe in the lining plate takes place with the aid of a bolt which simultaneously constitutes the pivot shaft of the support shoe.
It is a first object of the invention to create a support housing arrangement which permits the creation of a support shoe with the resiliently hinged fastening, in particular in accordance with P 43 41 626.8 which, when the arrangement of the hinge and spring elements is seated within the body of the respective lining plate, permits the fastening of the support shoe as well as of the brace within the body of the plate.
The attainment in accordance with the invention of the first object consists in that the housing of the type mentioned at the outset has housing collars, which project at a radial distance on both sides of the brace holding bolt past the adjoining exterior surface of the lining plate intended to be facing the inside of the trench, and have at least one continuous housing bore, and that the support shoe has shoe collars corresponding to the housing collars and essentially extending parallel therewith after assembly, with respectively one continuous shoe bore aligned with a housing bore for inserting a shoe holding bolt.
A characteristic preferred by the invention consists in that the two collars or collar layers (with the support shoe housing extending longitudinally in the transverse direction in respect to the brace holding bolt) are only provided in the area in front of and up to the ends of the longitudinal sides of the housing--and, if required, transversely in respect to it at the longitudinal ends--, because in the center area the collars would hamper the assembly or disassembly of the brace holding bolt. In other words it can be stated that the support shoe housing and the support shoe each have a collar extending past the exterior surface, which has recesses in the center area of the longitudinal sides of the housing at the places where the brace holding bolt must be pulled or pushed during assembly or disassembly. The two collars (of the support shoe and the housing) project two-dimensionally vertically (or obliquely) close to each other from the exterior surface, so that they are intended to be coupled by the shoe holding
REFERENCES:
patent: 3347049 (1967-10-01), Keine
patent: 3593528 (1971-07-01), Pavese
patent: 4056938 (1977-11-01), Griswold
patent: 4139324 (1979-02-01), Krings
patent: 5052862 (1991-10-01), Uffmann
Taylor Dennis L.
Wolfgang Richter
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