Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1989-11-16
1991-07-09
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
B65H 5900
Patent
active
050298151
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION OF THE INVENTION
The present invention relates to a cable guide arrangement for, in particular, combined laying and guiding of copper cables or the like and light-conducting cables, comprising a cable duct of concrete, earthenware, plastic or the like, and a cable guide unit made from plastic material and which may be introduced into the empty cable duct by pulling.
In a cable guide arrangement of this type, for example that known from German Patent Specification No. 32 17 401 C2, the two side cable guide pipes of the cable guide unit are connected to the two sides of a central cable guide pipe of larger diameter in a flexible manner such that the individual cable guide pipes may be drawn simultaneously into the empty cable duct in a similar manner to a bundle of cable guides. The interior of the cable duct is thereby substantially filled. In this manner the desired multiple use is made of the cable duct, which is empty, that is to say in which no cable has yet been laid, but the cable receiving space in the cable duct has a fixed cross section determined by the extrusion of the cable guide unit. This means that already at the time at which the cable duct is divided into several cable receiving spaces, the maximum cable diameters of the cables to be laid in the future must be decided. This is a problem, in particular when normal copper cables are to be subsequently laid, because they may have a large range of diameters, depending on the number of pairs of signal wires in the case of communications cables, or depend on the voltage or load which has to be carried in the case of power cables.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a cable guide arrangement
of the type mentioned above, in which the cable receiving spaces are variable to allow the cable duct to be used in multiple different ways.
To solve this problem a cable guide arrangement of the type mentioned above is provided with the following combination of features: the two cable guide pipes are rigidly connected to one another to provide a partition floor; the width of the partition floor is smaller by a given amount than the internal diameter of the duct; and the given amount is selected so that the partition floor is movable within the duct to divide the latter into two widely variable cable receiving spaces so as to prevent a cable, which is to be subsequently laid in one of the variable cable receiving spaces, from becoming jammed between the internal wall of the duct and the adjacent outer region of the corresponding lateral cable guide pipe of the partition floor.
With the cable guide arrangement according to the invention it is possible to subsequently lay a cable or cables, adjacent the two cable guide pipes of fixed diameter which are used, for example, for light-conducting cables, the two further cable receiving spaces being suitable for the diameter of the or each cable to be subsequently laid.
It is therefore, for example, possible by the division of the duct with the help of the partition floor into either upper and lower or right and left cable receiving spaces respectively, depending on the orientation of the partition floor, to insert cables of approximately the same diameter or cables of very different diameters. The partition floor, due to its mobility within the duct, allows itself to be appropriately deflected and thereby makes available the appropriate space for the cable which is to be pulled through. In this way, therefore, it is also possible, for example, in a cable duct of the type widely used in Germany having an internal diameter of 100 mm to make one of the cable receiving spaces available for a copper cable of from 50 to 60 mm in diameter A further advantage is that the cable receiving spaces are available also for the insertion of a bundle of cables, or for insertion of a bundle of cable guide pipes for thin cables. In this way the cable guide arrangement according to the invention is suitable for a very wide variety of different applications. While it is known from
REFERENCES:
patent: 4793594 (1988-12-01), Kumpf
Kumpf Ursula
Watson Robert C.
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