Supports – Brackets – Shelf or scaffold type
Patent
1998-08-14
2000-07-04
King, Anita M.
Supports
Brackets
Shelf or scaffold type
211 9001, E06B 728
Patent
active
060826908
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a bracket particularly but not exclusively for supporting and fixing conduit carriers for electrical cables, cables, conductors or flexible tubing of any type, such as fibre optics or fluid conduits.
DESCRIPTION OF THE RELATED ART
When installing electrical cables used in the most diverse of applications or, more generally, fluid conduits or flexible conductors, it is normal to use conduit carriers such as cable trays or cable ladders in which or on which the cables or the like are disposed.
More particularly but not exclusively, the bracket of the invention is intended for installing wire mesh cable trays and sheet metal cable trays. A non limiting example of such cable trays is given in European patent EP-A-0 298 825 for wire mesh cable trays and in French patent FR-A-1 573 264 for sheet metal cable trays.
To install cable trays at sites where they are to be mounted, brackets intended to support and fix them are disposed in known manner on the walls, surfaces or more generally on support structures along which the cable trays are to run.
Brackets for installing cable trays are already known, generally formed from sheet metal.
Such brackets include a fixing wall which is rectangular in shape to receive the cable tray, which is integral via each of its two long sides with a lateral wall perpendicular to the fixing wall. The two lateral walls are generally of the same dimensions and are disposed symmetrically with respect to a plane perpendicular to the fixing wall passing through the middle of the short sides of that wall.
The dimensions of such brackets, which are generally U-shaped, are such that they can be embedded by a short side of the rectangle of the fixing wall inside a U-shaped rail acting as a support structure on which the bracket is to be fixed, the fixing wall being perpendicular to the axis of the U-shaped rail, the bracket being mounted so as to project from the rail, with the rail being located vertically on a wall, for example.
The dimensions of the lateral walls are calculated as a function of the forces to be tolerated and the lateral walls are generally in the form of a rectangular trapezium with its long base applied against the floor of the U-shaped rail when the bracket is in position in the rail.
For mounting on the rail, each of the lateral walls includes at least one perforation located close to the long base of the trapezium and to the fixing wall, the perforations being opposite each other on the respective lateral walls to enable a pin to be passed through, the pin also passing through facing regularly spaced s perforations provided on the side members of the rail to enable the bracket to be mounted on the rail.
A bracket as described above requires the presence of a rail or an equivalent structure for mounting it.
Other types of brackets are known which are exclusively intended for direct mounting on a wall or a beam and which cannot be mounted inside a U-shaped rail; they include at least one dorsal wall pierced with holes for bolting directly to a wall.
One aim of the present invention is to provide brackets which are more economical than the traditional brackets described above, being easy to manufacture and in particular minimising the amount of material to be used while having the necessary rigidity to support conduit carriers.
A further aim is to provide a bracket which, in contrast to the brackets described above, is suitable both for cantilevering on by embedding in a perforated U-shaped rail type upright and for mounting directly on a wall partition, thus avoiding the need to hold in stock and to manufacture different brackets depending on their type of fixing.
A still further aim is to provide brackets onto which the conduit carriers can easily be fixed.
A still further aim is to provide a bracket which above all can be used to fix wire mesh cable trays but which, with a minimum of adaptation, can be used as readily for wire mesh cable trays as for sheet metal cable trays.
SUMMARY OF THE INVENTION
In acc
REFERENCES:
patent: 663784 (1900-12-01), Porter
patent: 2772846 (1956-12-01), Skar
patent: 2837219 (1958-06-01), Ferdinand et al.
patent: 4103855 (1978-08-01), Grosse
patent: 4450970 (1984-05-01), Shepherd
patent: 5297486 (1994-03-01), Herrmann et al.
patent: 5318264 (1994-06-01), Meiste
patent: 5346077 (1994-09-01), Randall
Boltz Roland
Durin Michel
King Anita M.
Metal Deploye S.A.
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