FR2657859A1 - ROLL COIL FOR A MULTILAYER STRIP PRODUCT. - Google Patents

Abstract

The present invention relates to a winding reel for a multi-layered strip product, the layers of which are stitched together. The coil (10) comprises two flanges (11 and 12) interconnected by three, for example cylindrical, studs (13). The flanges are triangular in shape and the studs are arranged in the angles of this triangle. A tubular element (14) allowing the passage of an axis is mounted in the center of the coil. A cable (15) of the "underlay" cable type comprising a layer of insulating material (15a) in which flat conductors are arranged and a conductive screen (15b) connected by spot soldering (15c) to the earth conductor embedded in it. the insulating material is wound around the pads (13). This winding reel is particularly advantageous for flat cables laid under a floor covering, in particular under a rug or carpet.

Description

i

  WINDING COIL FOR A MULTILAYER STRIP PRODUCT

  The present invention relates to a winding spool for a multilayer strip product whose layers are made integral by points, in particular for a flat electrical cable to be laid under a floor covering, in particular under a carpet or carpet, and comprising a web of insulating material in which at least three flat conductors arranged in parallel are coated, and a conductive screen consisting of a conductive strip, electrically and mechanically connected by welding points to one of the conductors

dishes connected to the ground.

  The packaging of the longitudinally non-elastic multilayer products whose layers are integral punctually or in areas distant from each other is difficult to perform on conventional cylindrical coils. Indeed, the circumferential lengths of the outer and inner layers with respect to the curvature are This inevitably results in tractions and compressions that cause periodic deformations of one or more layers, deformations that occur in the form of local folds In the case of flat cables, these deformations can cause irreversible damage such as cracking insulation layers, failure primers etc. The present invention proposes to overcome these disadvantages and to allow the packaging on winding coils of such types of products including flat cables commonly called cables under

carpet.

  For this purpose, the winding spool according to the invention is characterized in that it carries a winding support of the multilayer product comprising at least two studs having an at least partially cylindrical winding surface, with parallel axes and separated by a free intermediate space arranged to receive the substantially straight sections of this product disposed between the curved sections bypassing said pads. According to a preferred embodiment, said pads are

  mounted between two side flanges.

  The lateral flanges preferably have a shape

polygonal.

  According to a first embodiment, said pads are three in number and the lateral flanges are

substantially triangular.

  According to another embodiment, said pads are four in number and the lateral flanges are

substantially square.

  In a preferential manner, said pads advantageously have a height equal to the width of the multilayer product. The present invention will be better understood with reference to

  the description of an embodiment and the drawing

  in which: FIG. 1 shows a perspective view of a first embodiment of a winding spool according to the invention, and FIG. 2 is a perspective view of a second advantageous embodiment of FIG. a coil

winding according to the invention.

  With reference to FIG. 1, the winding reel essentially comprises two lateral flanges 11 and 12 having substantially the shape of a triangle with rounded angles. These two flanges are held parallel to each other by three cylindrical studs 13, of circular section, arranged in a triangle A tubular element 14, whose axis passes through the center of gravity of the lateral flanges, is connected to them to allow the passage of an axis about which the coil can be rotated. In the example shown, a cable flat called "under-carpet" cable is wound on this coil, and more precisely around the pads 13 This flat cable is a multilayer product since it consists of a thin sheet of insulating material 15a which coats flat conductors and a conductive screen 15b which is electrically and mechanically connected to the ground conductor embedded within the web 15a, at zones or points of weld 15c Apart from these points d e connection, the two strips constituted by the thin sheet of insulating material in which are the flat conductors, and the conductive strip which constitutes the screen, are free relative to each other The space between the pads 13 makes it possible to accommodate bulges of the inner band, bulges which are generated because of the curvature of the studs 13 In fact, in the winding zone around these studs, the circumferential length of the strip section arranged inside is greater than the corresponding length of the outer band Since the two strips are connected by points which are for example distant by about 50 cm, the length of the lower strip sections housed between two adjacent pads will be greater than the length of the sections corresponding to the upper band Since the space between the pads is free, these additional lengths can be accommodated in flexibility without it This results in permanent deformations and damage to the cable. FIG. 2 illustrates a variant in which the coil 'comprises two flanges respectively 11' and 12 'having substantially the shape of a square with rounded corners. These flanges are connected on the one hand by four cylindrical studs 13' arranged in the angles of the coil, and secondly by a tubular element 14 'mounted in the center of the coil A flat cable 15 is

  wound on this coil around the studs 131.

  It is obvious that the invention is not limited to the embodiments described but may undergo various modifications and be in various variants obvious to those skilled in the art In particular, the shape of the flanges, which defines the shape of the coils, can be modified as well as the number of

  bonding pads around which the product is wound.

  The flanges may have any polygonal shape, preferably regular, and the number of the pads is at least two. These pads may be solid or hollow and have a cylindrical shape or consist of simple curved plates having a radius of curvature sufficient to allow the winding of the cable

  without forming a break in the winding zone.

Claims (6)

claims   Coil winding for a multilayer strip product whose layers are secured by points, especially for a flat electrical cable to be laid under a floor covering, in particular under a carpet or carpet, and comprising a sheet of insulating material (15 a) in which at least three flat conductors arranged in parallel are coated, and a conducting screen (15b) consisting of a conductive strip, electrically and mechanically connected by soldering points to one of the flat conductors connected to the ground, characterized in that it carries a winding support of the multilayer product comprising at least two studs (13) having an at least partially cylindrical winding surface, of parallel axes and separated by a free intermediate space arranged to receive the sections substantially rectilinear lines of this product, arranged between the curved sections bypassing the said pads.   2 coil according to claim 1, characterized in that said pads (13, 13 ') are mounted between two   side flanges (11, 12; 111, 12 ').   Coil according to Claim 2, characterized in that the lateral flanges (11, 12; 11 ', 12') have a polygonal shape.   4 coil according to claim 3, characterized in that saiddots (13 = are three in number and in that the side flanges (11, 12) are substantially triangular. 5. Coil according to claim 3, characterized in that said pads (13 ') are four in number and that the side flanges (11', 12 ') are substantially square. 6 coil according to claim 1, characterized in that said pads (13, 13 ') have a height equal to the width of the multilayer product.