Tie bar for a power conducting chain

Details Tie bar for a power conducting chain Tie bar for a power conducting chain

1996-12-09

1998-06-23

Jones, David

Chain, staple, and horseshoe making

Chains

Conduit

59900, 248 49, F16G 1316

Patent

active

057688826

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a tie bar which can be used in a power conducting chain.
EP-A-0,415,050 has disclosed a power conducting chain which can be constructed from standardized individual components from a construction kit. A chain link is formed from two side parts which can be of essentially identical shapes, and the side parts are connected by means of at least one tie bar. The side parts have coupling section, using which the chain links can be connected together. In order to fasten the power conducting chain at a fixed point or at a movable point, specially shaped side parts which each have a coupling section were provided, in order to be coupled to the final link of the power conducting chain. The construction kit system designed in this way requires a total of up to four different, specially shaped side parts, which can be used for connecting the power conducting chain. Furthermore, in order to connect the fixed point or the movable point and the power conducting chain at each of the specially shaped side parts, an angle element is also required.
Other possibilities are also known for fastening power conducting chains of this kind at a fixed point or at a movable point. For this purpose, for example, bushings are provided in each of the side parts of a standard chain link, which bushings run transversely to the chain direction and parallel to the side parts. Screws can be introduced into these bushings, by means of which screws the respectively final side parts of the power conducting chain can be fastened at the fixed point or the movable point. If the provision of special side parts for the final links of the power conducting chain is to be avoided, a bushing of this kind has to be provided in every side part of a standard chain link. Since strong forces have to be taken up at the fastening points of the power conducting chain, the region surrounding the bushings must also be of correspondingly reinforced construction. This means that a side part of this kind has to be of an unnecessarily large and heavy configuration.
DE-U-89 01 955 discloses a power conducting chain which is constructed from individual chain links. Each chain link comprises two detachable webs which are able to connect the side parts of the chain link together and can be fitted onto corresponding projections of the side parts, forming press fits. In order to fasten the power conducting chain at a fixed point or a movable point, the web of a final link is designed with a fastening lug.


SUMMARY OF THE INVENTION

The object of the present invention is to provide a possibility for fastening strain relief devices in the chain links themselves, in particular in the final links, in particular also as a retrofit for power conducting chains which are already in use. A further object of the invention is to provide a connecting means of this kind for power conducting chains which is such that the provision of special connecting links is no longer required.
According to one aspect of the invention, there is provided a tie bar having ends, to be connected at the ends to side parts of a chain link of a power conducting chain, wherein the bar comprises a fastening groove which is open toward the center of the chain link, which groove is delimited by two parallel beads having ends, the beads being connected to one another via a base plate, wherein said fastening groove is a fastener of strain relief elements.
The proposal according to the invention specifies a means of fastening strain relief devices in the chain links themselves, which can be produced easily and hence cost effectively. The tie bar can be used in particular for power conducting chains which are already in use, since it can be retrofitted in chains of this kind. In contrast to the known prior art, in particular it is possible to construct a power conducting chain from identical chain links. The provision of special side parts for the final links of the power conducting chain are avoided. This has the advantage that no additional tools are require

REFERENCES:
patent: 3716986 (1973-02-01), Cork et al.
patent: 4626233 (1986-12-01), Moritz
patent: 5048283 (1991-09-01), Moritz et al.
patent: 5201885 (1993-04-01), Wehler et al.
patent: 5220779 (1993-06-01), Tatsuta et al.
KabelSchlepp Product Catalogue (Bugel-und Bundelschellen), May 1992.
"Energiefuhrungsketten mi Kunststoff-Kettenbandern", Kabel Schlepp, pp. 1-13, Jul. 1989.

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