DE1053602B - Spreizkoerper for applying elastic tuelles, preferably gummy touts, od on cables. - Google Patents

Description

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DES GERMAN «

PATENT OFFICE

The invention is concerned with the application of elastic grommets, preferably rubber grommets Cable or the like, as they are used in many ways, especially in electrical installation, for example, instead of tying off braided electrical wire strands and the like, attaching them such grommets that tighten the cable in question or od. Like. End to wrap, took place in such a way that the individual grommets are spread apart using grommet pliers and pushed over the end of the cable. Thereon the jaws of the grommet pliers are pulled out between the grommet and the cable, whereby the elastic Grommet firmly against the cable or the like. This type of application of the grommet is required in any case the presence of a pair of spout pliers, on the one hand Is expensive and even if it is available from the relevant installer or the like, not always as Tools are taken with them when the work is to be carried out outside the workshop.

In order to remedy this drawback, it is already known to use rubber grommets drawn onto expanding bodies use, whereby the expansion body has a larger inner diameter than the cable to be armored, so that after sliding over the expansion body removed and the rubber grommet by springing together can be brought to a tight fit. Such expansion bodies have been considered to be proportionate in and of themselves simple parts mostly made by punching and embossing. With the previously known Arrangements, however, the removal of the expansion body is associated with certain difficulties, because the rubber adheres firmly due to the tight pulling on and this adhesion hinders the stripping. For this reason, expansion bodies are also known in which the hose nozzle is rolled up and is applied to the cable by unrolling it during assembly.

The present invention avoids these disadvantages of the known expansion bodies. The invention relates to an expansion body for applying elastic grommets, preferably rubber grommets, to ropes, wires, cables, strands or the like, onto which the elastic grommet is drawn in a manner known ^{per se, for example:} by means of grommet pliers, and its inner diameter is larger than the outer diameter of the cable to be sheathed. According to the invention, the expansion body consists of a wire helix. The end of the helix in the direction of the cable is guided outwards in the axial direction in its interior, it being possible for this end to be provided with a loop or the like.

For armoring a cable or, for example, a double strand, as used in electrical devices, As lamps and the like are used, it is now an expanding body

for applying elastic grommets,

preferably rubber grommets,

on cable or the like.

Applicant:

Fritz Schwarzer,

Munich-Pasing, Bärmannstr. 38

Fritz Schwarzer, Munich-Pasing,
has been named as the inventor

only necessary to slide the prepared sleeve unit over the end of the cable to be armored and onto it remove the coil by pulling on the protruding free end. To the extent that that Helix is pulled out at the free end, the part no longer supported by the helix lies down the grommet under tension against the cable, with the grommet after the helix has been pulled out completely rests firmly on the end of the strand.

1 and 2, an example of the invention is shown.

Fig. 1 shows a ready-to-fit spout unit, while

Fig. 2 shows the application of the elastic grommet to a double strand to be reinforced.

In Fig. 1, 1 is the elastic grommet stretched on the expansion body, for example rubber grommet, designated. The spout is broken away at 2, so that you can see the expansion body, which consists of a Wire coil 3 consists. The upper end 4 of this wire coil ends blindly. The lower end 5 is inside the helix 3 is guided upwards at 6 and ends, for example, in a loop 7. The inner diameter the helix 3 is so large that the unit shown in Fig. 1 can be comfortably over the to be reinforced Cable, for example a double strand, can slide.

Fig. 2 now shows the armoring of the cable, in the present case a double strand. After the in The unit shown in Fig. 1 is pushed over the double strand 8, the loop 7 is pulled so that the end 6, which leads upwards inside the helix 3, starting at the lower end 5 of the helix, Turn by turn of the wire pulls outwards,

809 787/408

Claims (3)

so that the support of the elastic grommet disappears and the grommet, as can be seen at 9, is placed against the stranded wire 8 under tension. As the coil 3 or the wire 6 is increasingly withdrawn, the grommet 3 lies closer and closer to the stranded wire 8, until finally the entire grommet 1 rests against the stranded wire 8 when the last turn is pulled out. Patent claims: 1. Spreader for attaching elastic grommets, preferably rubber grommets, to ropes, Wires, cables, strands or the like. On which the elastic grommet in a known manner, for example by means of a grommet pliers, and the inside diameter of which is larger than the 10 outer diameter of the cable to be sheathed, characterized in that it consists of a wire helix. 2. expansion body according to claim 1, characterized in that one in the direction of the cable lying end of the helix is guided in the interior through to the outside and preferably with a loop or the like. Is provided for pulling out. 3. Ready-to-fit sleeve unit, marked by an expansion body according to claim 1 and / or 2 with an elastic one pulled over it Grommet, for example rubber grommet. Considered publications:
German patent specifications No. 433 974, 961 447. 1 sheet of drawings © 80 »787/408 3.59