Static structures (e.g. – buildings) – With adjunctive means for assembly or disassembly – Having component positioning means or control means for...
Patent
1996-01-05
1997-09-23
Wood, Wynn E.
Static structures (e.g., buildings)
With adjunctive means for assembly or disassembly
Having component positioning means or control means for...
52632, 5280111, 249 24, 249210, 2492191, E04G 908, E04G 902, E04G 1106, E04G 1714
Patent
active
056691882
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a form panel with at least one girder which supports the lining skin on the side averted from the concrete and has an approximately U-shaped cross section, the U-limbs of the girder being connected by a U-crosspiece situated on the side averted from the lining skin, and the U-limbs--viewed in cross section--diverging slantwise from the U-crosspiece and in each case having at their free ends--viewed in cross section--oppositely directed fastening flanges which project outwardly from the U-limbs and serve for being applied to the lining skin.
BACKGROUND OF THE INVENTION
Such a form panel is known for instance from German Patent Specification No. 24 26 708. The form panels described therein are parts of large-size formwork for surfaces of varying curvature, having a lining skin adjustable with respect to their curvature. Features serving this purpose are that as the curvature is changed the U-limbs are laterally movable without permanent deformation and boom sections of variable length are applied to the U-crosspieces. This formwork has proved successful.
If it is necessary, however, that formwork work exceeding the height of such a form panel be carried out above or beneath it, it has hitherto been difficult to extend the form panel in an upward or downward direction. This applies particularly when, for instance, shuttering the side wall of a ramp or inclined approach which may run straight ahread or at the same time in a curve.
SUMMARY OF THE INVENTION
The object underlying the invention is therefore to provide a form panel of the kind mentioned at the outset, enabling the girders having an approximately trapezoidal cross section to be extended very simply in spite of the projecting fastening flanges on them.
This object is accomplished in that the girder consists of two U-shaped girder parts or portions which are adjustable relative to each other in the longitudinal direction and embrace each other at least in an overlapping zone, whereby inside the cross section of the at least partially internal girder portion the U-limbs thereof form together with the lining skin an angle of inclination which is more obtuse or larger than that of the external girder portion embracing the internal girder portion, and that at the lining skin the clear width between the U-limbs of the internal girder portion is at least the total width of the oppositely directed fastening flanges smaller than that between the U-limbs of the external girder portion, and that the fastening flanges of both girder portions lie side by side in the same plane.
Despite the requirement of providing the U-limbs with outwardly projecting fastening flanges for joining to the lining skin, so as to be able to fasten the girder parts or portions to the lining skin and if necessary to allow some deformation for adaptation of the curvature, it is hence achieved that the girders can be extended in their longitudinal direction in a simple way. It is true that there have already been telescopically extensible girder parts in formwork construction, however the inside cross sections of their external portions correspond to the outside cross sections of their internal portions. To allow for the fastening flanges, the cross sections of the two girder portions of the form panel according to the invention differ considerably from each other in that the angle included by the U-limbs is more acute in the case of the internal girder portion than in the case of the girder portion embracing the latter. The fastening flanges of the two girder portions are therefore in each case at different distances from each other and the internal girder portion together with its projecting flanges can be accommodated within the external girder portion. It is nevertheless ensured that the internal girder portion also has--viewed in cross section--limbs diverging slantwise which are movable with their fastening flanges without permanent deformation when the curvature of the form panel is changed. At the same time correspondingly go
REFERENCES:
patent: 14807 (1856-02-01), McKay
patent: 1287573 (1918-12-01), Davidson
patent: 1292986 (1919-02-01), Ambursen
patent: 3854693 (1974-12-01), Kistler
patent: 5492303 (1996-02-01), Jarunzel
patent: 5509635 (1996-04-01), Jarunzel
Paschal-Werk G. Maier GmbH
Saladino Laura A.
Wood Wynn E.
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