Cable sleeve

Abstract: The invention relates to a cable sleeve, comprising two metal shells which can be mutually coupled by means of coupling means in order together to form a housing, the inner space of which is accessible to at least one cable core via at least one opening bounded by edge zones of both shells. The cable sleeve according to the invention has the feature that each shell consists of sheet-metal; and the coupling means comprise a plurality of lips present on the edges of at least one of the shells, which lips can each be bent round the opposite edge of the other shell.

Description: The invention relates to a cable sleeve comprising two metal shells, which can be mutually coupled by coupling means in order to form a housing, the inner space of which is accessible to at least one cable core via at least one opening bounded by edge zones of both shells, wherein the coupling means comprise a plurality of lips present on the edges of at least one of the shells, which lips can each be bent round the opposite edge of the other shell. Such a sleeve is known from US-A-2930835. A disadvantage of said cable sleeve is that a considerable bending force has to be exerted on a small free end of the lips. When closing the cable sleeve manually the bending force is limited by the human fingers. It is an object of the present invention to leviate the mentioned disadvantage. It is further an object of the present invention to ensure a proper and watertight closure of both shells. These objects are reached by the present invention, which is characterized in that each lip has a weakened zone serving as bending zone, and an end zone with enlarged surface. According to the invention it is possible to exert a larger bending force on the lip with a lower pressure on the free end of the lip. Because of this it is possible to close the cable sleeve more tightly and to obtain a better watertight cable sleeve. In a preferred embodiment of a sealing strip is arranged between the facing end zones of both shells. This improves the watertightness of the cable sleeve. Another preferred embodiment according to the invention is characterized in that each lip extends perpendicular to the mutual facing end zones. Because of this the shells can be easily positioned and put together. A specific variant has the characteristic that at least one shell has an opening for admitting filling mass, into which opening a plastic ring is clicked which is closeable by a cover, for instance a screw cover of for instance plastic. In yet another embodiment this variant can have the special feature that the ring and/or the cover carries information, for example a brand name, a type designation or the like. The sleeve preferably has the feature that the opening is formed in a flat sheet-metal zone. The ring can have a simple rotation symmetrical shape, while the connection is good. It is noted that the ring may also have the function of covering irregularities in the shape of the opening. A particular embodiment of the cable sleeve according to the invention has the special feature that the shells are substantially symmetrical. An embodiment wherein the edge zone of a shell has an eye through which a relatively wide and thus rigid lip of the other shell can be placed in order to form a hinge therewith, has the advantage that simple prepositioning of the shells can be achieved, thereby facilitating the positioning of the shell parts prior to bending of the lips. It is noted that the sleeve according to the invention is filled after assembly with a filling mass, for example liquid polyurethane, which cures and thus forms an insulating mass. This material adheres strongly to the surface of the shells. Even in the case where the lips have rusted through after a period of time, this cured filling mass holds the shells together. The ring and the associated cover can for instance be injected moulded together from polypropylene and mutually connected in per se known manner by a plastic wire. The quality of the material does not have to meet high standards. Recycled quality is also considered suitable. The inlet of the cables into the sleeve, which is not shown in the drawings to be described hereinbelow, is given a robust form. This results in the following advantages: leakage of filling mass to the outside is prevented. the sleeve can be buried quickly in the ground without sinking downward under the weight of the ground. the electrical connection between the cable cores present in the sleeve is not loaded by movements of the cable during curing of the filling mass. In order to realize all this the cable is wound up with relatively soft, rubber-like material which can for instance be self-vulcanizing. Into the recess in the region of the cable inlet is clicked a plastic, for example polypropylene, mould part which follows the contour of the wound cables. The large number of recesses in the mould part permits a wide range of winding diameters. A ridge in the middle of the mould part protrudes through the sheet-metal, thereby simplifying fixing by means of snap connections. The ridge increases the rigidity of the mould part. The ridge can carry information, for example a brand name, a type designation, a serial number or the like. This information is arranged in relief by means of insert pieces in the injection mould. This is more attractive than arranging the text in the sheet-metal because greater detail is possible in plastic. It is further less expensive to stock different injection moulded parts than different shell parts. Sealing between mould part and sheet-metal can take place with a thin standing membrane on the mould part. In the case the sleeve is a branch sleeve, the height of the partition between the main core and the branch core varies so that a labyrinth-like seal is created. A specific embodiment is characterized by fixation means for fixing a cable relative to the cable sleeve, which fixation means comprise a collar consisting of two co-acting parts. This latter variant can advantageously have the special feature that the collar has at least one protrusion which fits in a hole present in a shell. The invention will now be elucidated with reference to the annexed drawings of a random embodiment. In the drawings: Figure 1 shows an exploded view of a cable sleeve according to the invention; Figure 2 shows a perspective view of an assembled sleeve according to the invention; Figure 3 shows a partly perspective view of a part of the sleeve during assembly; Figure 4 shows the same view in the final phase of assembly; and Figure 5 shows a partly broken away perspective view of another part of the sleeve. Figures 1 and 2 show a cable sleeve 1 comprising two metal shells 2,3 which together form a housing, the inner space of which is accessible to a number of cables 4,5,6. The internal structure and the manner of coupling of the cables are of no significance to the present invention. Each shell 2,3 consists of galvanized steel. The lower shell 3 comprises a number of lips which for the sake of convenience are all designated by 7 and which have a general T-shape with widened press-on surface. The lips 7 can be bent as according to arrows 8 such that the respective side edges 9,10,11,12 of shells 2,3, after being placed on each other, can be mutually connected with the bent lips. Figure 2 shows the manner in which this coupling can take place. Figure 1 shows that the lips 7 are bent out of the main plane of the edges 9,10, for instance through almost 90 degrees, whereby good positioning of the edges 11,12 can be realized easily. Foam material sealing strips 13,14 have respective shapes corresponding with those of edges 9,10. They are provided locally with widened portions 15 which each have a cut 16 which can co-act in positioning manner with a relevant lip 7. The shell 3 has a filling opening 17 in a flat shell part 18 to be described with reference to figure 5. The end zones of shells 2,3 are provided with slotted holes generally designated 19 into which fit protrusions 20 which form part of collars 21,22 embodied in divided form. These collars have through-holes 23 for passage of cables 4,5,6. The protrusions 20 are provided with information. The parts of which collars 21,22 consist can advantageously be wholly symmetrical. They can be embodied in plastic whereby the information can be arranged in relief via the injection moulding process. Figure 3 shows the manner in which a sealing strip 13 is positioned. After placing of the shell 2, the lips 7 can be bent in the manner shown in figure 4 as according to arrow 8. Figure 5 shows that into the through-hole 17 an annular insert piece 24 has been snapped which is provided with internal screw thread 25. A screw cap 26 can co-act herewith. Both insert piece 24 and screw cap 26 can be made of plastic by injection moulding. Similarly to protrusions 20, the outer surface of these components can carry information in relief. The opening 17 serves for filling of an assembled sleeve with filling mass. Such a filling mass is generally supplied in a flexible bag or pouch. This pouch can easily be fixed to the sleeve in order to enable filling without spillage. A bag clamp can be used for this purpose which consists for instance of a plastic such as polypropylene. This injection moulded component is fixed to the corner point of the pouch and then clicked onto the annular insert piece 24. The pouch can thereafter be cut through in per se known manner and emptied into the sleeve. After emptying, the bag clamp can again be released. By making use of a click connection between the sleeve and the pouch the mutual connection cannot be broken during emptying of the pouch.

Claims: Cable sleeve comprising two metal shells consisting of sheet-metal, which can be mutually coupled by coupling means in order to form a housing, the inner space of which is accessible to at least one cable core via at least one opening bounded by edge zones of both shells, wherein the coupling means comprise a plurality of lips present on the edges of at least one of the shells, which lips can each be bent round the opposite edge of the other shell, characterized in that each lip has a weakened zone serving as bending zone and an end zone with enlarged surface. Cable sleeve as claimed in claim 1, characterized by a compressible sealing strip, for instance of foam plastic, arranged between the mutually facing edge zones of the shells. Cable sleeve as claimed in claim 2, characterized in that the sealing strip has through-holes, for example cuts, for passage of and thus positioning by at least a number of lips. Cable sleeve as claimed in claims 2 and 3, characterized in that each lip extends perpendicularly to said mutually facing end zones. Cable sleeve as claimed in claims 1-4, characterized in that at least one shell has an opening for admitting filling mass, into which filling opening a plastic ring is clicked which is closeable by a cover, for instance a screw cover of for instance plastic. Cable sleeve as claimed in claim 5, characterized in that the opening is formed in a flat sheet-metal zone. Cable sleeve as claimed in claim 1-6, characterized in that the edge zone of a shell has an eye through which a relatively wide and thus rigid lip of the other shell can be placed in order to form a hinge therewith. Cable sleeve as claimed in claims 1-7, characterized by fixation means for fixing a cable relative to the cable sleeve, which fixation means comprise a collar consisting of two co-acting parts. Cable sleeve as claimed in claim 8, characterized in that the collar has at least one protrusion which fits into a hole present in a shell. Cable sleeve as claimed in claims 1-9, characterized in that the sheet-metal is aluminium.

Inventors: BRUS BERNARD LOUIS, ROODENBURG PIETER, SCHELLEVIS CAMILLE JEAN BAPTIS, VAN DEN HOUT JAN SIMON, BRUS, BERNARD LOUIS, ROODENBURG, PIETER, SCHELLEVIS, CAMILLE JEAN BAPTISTE, VAN DEN HOUT, JAN SIMON
Applicants: LOVINK TERBORG BV, LOVINK TERBORG B.V.
Application year: 1996
Main classification: H02G15
IPC codes: H02G15