Supports – Pipe or cable – Brackets
Patent
1994-05-12
1996-06-25
Chotkowski, Karen J.
Supports
Pipe or cable
Brackets
248 49, 248600, F16M 1300
Patent
active
055292690
DESCRIPTION:
BRIEF SUMMARY
In electrical plants having a large number of connecting cables, it is usual to amalgamate these cables into cable harnesses, as they are known, and to pre-manufacture these for the purpose of easier assembly. For the premanufacture, a laying device is used which exhibits, on a bench-like laying shelf, as it is known, a plurality of mountings which are open at the top and into which the cables are inserted and by which the cable harness, especially at branches and bends, is held in the predetermined position. If all individual cables are gathered together in the device to form the cable harness, the cable harness is laced at a number of points by means of cable binders and removed from the laying device.
Known laying devices exhibit U-shaped holders, which are formed by two holding fingers fastened to a common column, the upper end of the column, at the base of the two holding fingers, forming a support for the cable harness, which is raised from the laying shelf so that a distance which is necessary for the engagement of a binding tool, is left between the cable harness and the cable shelf. At the points where the cable harness changes its laying direction, holders are used, the U-opening of which is laterally directed, the upper one of the holding fingers, which in this case are horizontally disposed, being able to be swung out upwards in order to simplify the removal of the cable harness. Yet other holders have the form of simple nails or pins, which are hammered into the laying shelf and likewise serve for the lateral limitation of the cable harness position. (Source of this prior art: Prospectuses of the companies Panduit Corp. and Thomas & Betts).
For the lacing of cable harnesses by means of cable binders, lacing tools are used, which comprise an arm-thick tool body and, at the front end of this, a narrow guide part which enclasps the cable harness in a pincer-like manner. The cable binders are readily placed as close as possible to branches or bends in the cable harness. These are also however precisely those points at which, in the laying device, a holder or holding finger is generally located. The cable binder should therefore desirably be placed as close as possible to such a holder or holding finger. The width of the tool body often proves to be an obstacle to this, since it makes it impossible to apply the narrow guide part directly next to a holder. For the bending region of a cable harness, U.S. Pat. No. 4,337,934 therefore proposes a holding finger which is displaceable in its longitudinal direction on a holding pin hammered into the laying shelf and which supports at its lower end a plate serving to support the cable harness. As soon as the cable harness is ready-moulded and is set to be laced, the finger, together with the plate, is lowered on the holding pin, so that the cable harness now lies exposed in this region and is accessible to a lacing tool. This known solution has the drawback that the support for the cable harness and its lateral limitation are lost whenever the holding finger is lowered. It demands therefore that the cable harness should be held rigidly in the proximity of the bend, namely by vertically inflexible holders on which there are disposed, in each case, a pair of clamps which are resiliently flexible transversely to the cable harness and the flexibility of which is dimensioned such that wires for the creation of the cable harness can be introduced between them and the finished cable harness removed between them (U.S. Pat. No. 4,029,277). The flexibility is not however sufficient to make the cable harness freely accessible to a lacing tool. This was manifestly not considered necessary in the region of the straight path of the cable harness, since it was felt that there was in any case sufficient space available there in which to fit the lacing point or arrange a column. Yet this overlooks the importance of branches, which can emanate from the straight path of the cable harness and at which both a column and a lacing point are readily provided. The object of the inv
REFERENCES:
patent: 4029277 (1977-06-01), Bulanda
patent: 4337934 (1982-07-01), Caveney
patent: 4566502 (1986-01-01), Kellogg
IBM Disclosure Bulletin May 1986 vol. 28 No. 12 pp. 5607-5610.
Chotkowski Karen J.
Paul Hellermann GmbH
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