FR2986545A1 - DEVICE FOR BONDING PREFABRICATED STRUCTURES FOR BUILDING CONSTRUCTION - Google Patents

Abstract

Connecting device (1) for connecting two prefabricated structures (3, 4) having rectilinear recessed edges (5, 6) extending opposite one another. The device (1) comprises: - a flexible cable (7) having first and second end ends (7a, 7b) between which are located cable areas (8a, 8b, 8c) spaced from each other along the cable (7); spacing limitation means (9) connected to the zones (8a, 8b, 8c) so that when these zones are separated as much as possible from each other, the cable (7) forms several loops (10) which extend respectively between the regions of the cable and are arranged to be able to penetrate at least partially inside said recessed edges when the cable (7) is arranged between the two prefabricated structures (3, 4) so that a straight line passing through its ends (7a, 7b) extends substantially along these borders (5, 6).

Description

The invention relates to the construction of buildings and more particularly to a device for the connection of prefabricated structures. BACKGROUND OF THE INVENTION It is known, for example from JP5179677, to connect prefabricated structures using connecting devices. After the bonding of the prefabricated structures, a binder, such as cement, is generally introduced between the adjacent edges of the prefabricated structures so as to securely join them to each other. OBJECT OF THE INVENTION An object of the invention is a means for limiting the time required to set up the connection device between the prefabricated structures. SUMMARY OF THE INVENTION To this end, according to the invention, there is provided a connecting device for connecting two prefabricated structures having rectilinear recessed edges extending facing one another. This connecting device comprises: - a flexible cable having first and second end ends between which are located areas of the cable spaced apart from each other along the cable; means for limiting the spacing of the zones of the cable relative to each other, these limiting means being connected to said zones so that when these zones are separated as much as possible from each other, the cable forms several loops which extend respectively between the zones of the cable and are arranged to be able to penetrate at least partially inside said recessed edges when the cable is arranged between the two prefabricated structures so that a straight line passing through its ends extends substantially along these borders. The spacing limitation means are such that when the areas of the cable, connected to the limiting means, are spaced apart as much as possible from each other, this cable remains distended between its first and second ends. By "stretched between its ends" means that the cable can not be stretched from one end to the other between its ends.

The maximum spacing allowed by the spacer limiting means is such that the cable forms a plurality of loops disposed along the cable. The loops formed by the cable distributed along its length in association with the limiting means maintaining these loops allow to introduce the loops inside the recesses of the adjacent rectilinear edges without the risk that these loops disappear by pulling the cable during its introduction. To perfect the connection, a binder is introduced into these recesses and, thanks to the loops of the cable, an armature is formed surrounded by the binder which extends between the prefabricated structures and inside their adjacent recesses. The connecting device according to the invention is particularly easy to implement because the flexibility of the cable allows the elastic deformation of the loops during the introduction of the device in the adjacent recesses of the prefabricated structures. This results in a saving of time and manpower for the establishment of the connecting device.

In a particular embodiment of the invention, the cable is wound so as to form a spring comprising a plurality of turns, each of these turns having two loops opposite one another, these loops of the spring cable being said loops arranged for penetrate at least partially inside the hollowed edges. The spring effect of the cable is provided to tighten the loops and oppose the extension of the connecting device. The fact that the cable is spring makes it easier to store. It is also proposed according to the invention a kit comprising a connecting device according to the invention and a tool for extending the device of the invention to put it in place in recesses of adjacent borders of the prefabricated structures. It is also proposed an assembly comprising two prefabricated structures and at least one connecting device according to the invention which is surrounded at least partially by a binder such as cement. Typically, this assembly according to the invention is a portion of a building such as a wall, a floor or a ceiling, or a wall connected to a floor or a wall connected to a ceiling. For the understanding of the invention, the following definitions are given: The maximum length of the cable is the total length of the cable when it is stretched between its ends and that it does not form loops, that is to say when the limiting means do not limit the spacing of the different areas of the cable relative to each other; - A loop is a curvature of the cable obtained mainly by bending the cable along its length. A loop should not be confused with a twist of the cable which is obtained mainly by twisting the cable on itself. Note that the cable can be both looped and twisted. Finally, prefabricated structure means all structures made before being assembled together. Such structures are generally made of concrete but may be of various moldable materials.

BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings, among which: FIG. partial longitudinal of a connecting device according to the invention used to connect two walls of prefabricated walls, this figure 1 shows keying bars arranged in the walls to bind them together by blocking the loops of the cable in the respective recesses of the walls ; - Figure 2 is a cross-sectional view of a building angle formed by two prefabricated structures between which is positioned a connecting device according to the invention before injection of the binder; - Figure 3 is a cross-sectional view of prefabricated panels positioned to form a flat wall and between which is placed the connecting device according to the invention before injection of a binder; - Figure 4 is a cross-sectional view of a prefabricated floor and a prefabricated wall arranged to be interconnected by means of a binder, the connecting device according to the invention being placed between these prefabricated structures ; - Figure 5 illustrates the establishment of the device according to the invention in recesses of adjacent edges of prefabricated panels, in this mode the device comprises four links parallel to each other when they are tensioned together by a rectilinear tool; FIG. 6 illustrates the connecting device of FIG. 5 once put in place in the recesses of the adjacent borders of the prefabricated panels; FIG. 7 is a perspective view of a connecting device according to a first embodiment in which it comprises a flexible link formed by a strip, this flexible link being used as a limiting means for keeping resilient loops of the cable in shape; FIG. 8 is a perspective view of a connecting device according to a second embodiment in which it comprises a rigid bar serving as a limiting means for keeping cable loops in shape; FIG. 9 is a longitudinal view of the connecting device of the invention according to a third embodiment in which there are two flexible links connecting turns of the cable between them, these flexible links being parallel to each other and being wires or ropes; FIG. 10 is an example of a rigid bar intended to keep the zones of the cable close together so as to create loops on the cable; Figure 11 illustrates a manufacturing mechanism of the connecting device according to the invention, in particular the connecting device which is manufactured in this figure 11 corresponds to that illustrated in Figure 9; - Figure 12 is a part of the connection kit according to the invention comprising a support on which is positioned a connecting device according to the invention with its folded cable and a pre-cut box to receive the support and the folded connecting device; FIG. 13 is a cross-sectional view of the support and the connecting device of FIG. 12; FIG. 14 illustrates the positioning of a connection kit of the invention in relation to the adjacent recesses of two precast panel edges, in order to put in place the connecting device before introducing a binding agent; - Figure 15 shows a box belonging to the kit according to the invention illustrated in Figures 12 and 14, in this box is disposed the device of the invention before deployment. DETAILED DESCRIPTION OF THE INVENTION The connecting device 1 according to the invention is intended to allow the connection between two prefabricated structures 3, 4 having edges 5, 6 adjacent to each other and respectively recessed. This device is intended to be inserted into these recesses in an insertion direction which is parallel to these adjacent edges 5, 6 pre-positioned relative to each other. Each recess of a border 5, 6 is rectilinear and extends along this border which is also rectilinear. These recesses resemble mortises, along which it is possible to slide a looped flexible cable 7 of the device 1. The prefabricated structures 3, 4 are arranged in such a way that the rectilinear and adjacent recesses of the structures to be connected face each other. one of the other and are parallel to each other and oriented towards each other. When the cable 7 is arranged so that a straight line passing through its ends 7a, 7b extends between these adjacent recessed edges 5, 6 and along these edges, the loops 10 of the cable then penetrate into the adjacent recesses. .

As seen in Figures 1 to 6 and 14, once disposed between these prefabricated structures, that is to say once inserted into their rectilinear edges 5, 6 recessed, the connecting device 1 forms a reinforcement which after injection of Binder in these same recesses efficiently links the prefabricated structures 3, 4 and thus forms a unit 19 integral. Each of the prefabricated structures 3 and 4 comprises two walls facing each other and interconnected by reinforcing rods or links 20.

These rods 20 connecting the walls in pairs can be part of a strapping 26 linking together four parallel rods 27 as is the case on the sets 19 of Figures 1 to 4. Two of the four rods 27 connected to the aid. rods 20 are taken in one of the walls of molded material (such as concrete) and the other two rods 27 are taken in the other of these walls. In another embodiment visible in FIG. 14, each wall of moldable material (concrete) contains a mesh 28 extending inside the wall to serve as a reinforcement and the rods 20 extend between these walls. parallel so as to keep them apart from each other. Thus, in all the embodiments of prefabricated structures, each structure has a rectilinear recessed edge through which rods 20 extend which make it possible to bind the walls of the structure 3, 4 together. These rods 20 of the border form at least one alignment of rods 20 equidistant from each other. These rods 20 form the bars of a kind of scale. The connecting device 1 is designed to allow extending in these adjacent recesses of the structures and this despite the presence of the rods 20. For this, the device 1 according to the invention comprises a flexible cable 7 and elastic bending comprising a plurality loops 10 disposed between its first and second ends 7a, 7b. As the cable has elasticity in bending, the loops formed are therefore elastically deformable.

As seen in Figures 1, 2, 3, 4, a first key bar 31 is disposed between the walls of the first prefabricated structure 3. This first keybar 31 extends behind the rods 20 which connect the walls of the first structure 3 and it passes through the loops 10 of the cable which extend into the recess of this structure 3 and pass behind the rods 20. A second keybar 31 is disposed between the walls of the second structure 4. This second bar 31 extends behind the rods 20 which connect these walls of the second structure 4 and it passes through the loops 10 of the cable 7 which extend into the recess of the structure 4 and pass backwards. 20. This arrangement of the two keying bars 31 makes it possible to prohibit the exit of the loops 10 from the respective recesses of the structures 3, 4, since if it is desired to remove the loops 10, they then push the bars 31 to v abrir against the rods 20 of the structures 3, 4. This connection has an antiseismic protection function since if the concrete breaks under the effect of an earthquake, the bars 31 of keying, preferably steel, and the 7 maintain a deformable link between the structures 3, 4 prohibiting a complete separation of these structures 3, 4. The limiting means are connected to the different areas 8a, 8b, 8c of the cable so that when these areas of the cable are separated the As much as possible from each other, the majority of the loops thus formed have the same shape and are arranged at regular intervals along the cable. Ideally, as seen in Figures 1 and 6, these loops 10 are spaced by the limiting means 9 so that between two rods 20 of the same row of rods 20 aligned in the recess of a border 5, As a result, at least one loop 10 is formed. A plurality of loops distributed in a regular pattern along the cable are thus formed with regular loop shapes and spacings between adjacent loops 10 which are also regular. The equidistance between the adjacent loops makes it possible to have a regular penetration of the portions of loops in the recesses of the rectilinear edges 5, 6 of the prefabricated structures 3, 4. The cable 7 thus elongated between its ends 7a, 7b according to a straight line passing through these ends 7a, 7b and placed between the structures 3, 4 has a part of the loops 10 which is introduced into the recess of the structure 3 while another part of these loops 10 is introduced into the other recess adjacent to the structure 4. The cable 7, preferably made of steel, makes it possible to form a binding reinforcement having a regular pattern. The binder, once solidified in the recesses, traps at least some of the loops 10 formed between the structures 3, 4 thus creating a rigid composite connection between these prefabricated structures 3, 4. The limiting means 9 used to limit the maximum spacing between zones 8a, 8b, 8c of the cable may comprise: - a rigid bar 13, as in Figures 1, 8 and 10 and / or - one or more flexible links 11 such as in Figures 2 to 7, 9 and 11 to 14. In the mode of Figure 1, the limiting means 9 comprises a rigid bar 13 of shorter length than the cable, in this case its length measured between the ends of the flexible cable with which the bar is assembled is lower than at least 20%, preferably at least 50% of the maximum length of the cable 7 measured between its ends 7a, 7b.

The greater the difference in these lengths, the larger the loops 10. As can be seen in FIGS. 8, 9 and 10, assembly means 13a, 13b, 13c, 13d are arranged along the bar 13, at regular intervals, to fix the zones 8a, 8b, 8c of the cable . Ideally the cable is wound several times around the rigid bar 13 which is thus used as a cable support to limit the maximum distance between the cable areas and as a longitudinal reinforcement to stiffen the assembly between the prefabricated structures 3, 4. 13 is provided so that, during the positioning of the device 1 between the structures 3, 4, the assembly means 13a, 13b, 13c are arranged in a plane located between the rods 20 and equidistant from these rods 20 in order to have a symmetrical deformation of the loops 10 placed in the recesses. This makes it possible to have a uniform depression of the loops in the opposite recesses. It is the same with the flexible links that are connected to the cable so that their links with the cable are on both sides and equidistant from a plane parallel to the rods 20 and equidistant from these rods 20. As it is see in Figure 8, an assembly means may be a simple perforation 13a through the bar 13 to pass the cable 7 while spiraling around a portion of the bar 13. In this mode the bar can be in two parts separated in the direction of the length of the bar and between which are formed the perforations. Another means of assembly may be a hook 13b fixed on the bar 13 forming a clamp for clamping a cable area 8b against the bar 13. Such a hook can be made by cutting and stamping a shape in the bar or can to be fixed on the bar for example by welding. It is thus possible to realize these assembly means by fixing a row of hooks along the bar 13. Another assembly means can be realized using kinds of U-shaped clips 13c fixed on the bar 13. illustrated in Figure 10, another assembly means can a series of open cuts 13d on the edges of the bar 13. In this case the size of each cutout allows the passage of the cable 7 in the cutout for it keep it there. Ideally, the bar 13 has a cross-section that is favorable for having a number of parallel edges that are easy to cut and that allows longitudinal rigidity of the bar 13. Thus, the bar 13 can have an H-shaped cross section as in FIG. 10, in U, in Z-shape. or any other section having at least two edges adapted to be cut to form the notches 13d cable passage. In all cases these assembly means attached to the bar 13 may be arranged in pairs, each pair of assembly means being located between two corresponding loops 10 (as is the case of the means 13c in Figure 8). This avoids the rotation of the areas of the cable assembled with the bar 13 relative to this bar. Even after deformation of the cable when it is introduced into the recesses, a relatively homogeneous loop geometry is thus maintained throughout the bar. In other modes, such as those of Figures 2 to 7, 9 and 11 to 13, the limiting means 9 comprise one or more flexible links 11. In this case, a flexible link 11 can be formed using a wire as in Figures 2 to 6, 9, 11 to 13, or using a strip such as a metal strip as in Figure 7.

Each flexible link 11 has a maximum length, measured between the ends of the flexible link, which is less than 20%, preferably at least 50%, of the maximum length of the cable 7 measured between its 7a, 7b. The connecting device 1 comprises several assembly means 12 of the flexible link 11 with the cable 7, these assembly means 12 being fixed along the link 11 and each to a corresponding zone of the cable 7.

An assembly means 12 may be a knot made with the flexible link around the cable (as in FIGS. 5, 6, 9) or crimping or stapling or welding (particularly if the flexible link is metallic), as in Figures 2, 3, 4, 11, 12, 13.

Ideally, the device 1 comprises a plurality of flexible links 11 distributed symmetrically around a general direction of the device 1. This is particularly the case: - for the embodiment of FIGS. 5 and 6, where there are four flexible links extending each along the general direction of the device 1 and each connected to the cable at regular intervals; or else - for the embodiment of Figures 11 to 13 where there are two links distributed on either side of the device 1 and each connected at regular intervals to the cable to force it to make a loop between a link with a first soft link and a link with the second soft link. The advantage of having a plurality of flexible links thus distributed is that when the zones 8a, 8b, 8c of the cable 7 which are connected to the connecting means 9 are spaced as far as possible from each other, the device then comprises a rectilinear hollowed area. Z extending between the first and second ends 7a, 7b of the cable. As seen in FIGS. 5, 12, 13 and 14, this recessed zone Z is arranged to allow the passage of a rectilinear tool 17 forcing the spacing of the second end 7b of the cable 7 relative to the first end 7a. 7. It will be noted that in FIGS. 2, 3 and 3 is illustrated the device 1 of FIGS. 9 and 11, the flexible links of which are two in number and situated on either side of a plane passing through all the loops 10 of the cable 7. These flexible links 11 when extended, to limit the spacing of the cable areas relative to each other, form two parallel lines between them passing through a plane equidistant from the ends of the loops 10 of the cable, thus favoring an insertion symmetry of the device 1. The invention also relates to a connection kit 14 for making a connection between two prefabricated structures 3, 4 as described above and further comprising at least one connecting device 1 according to one any of the modes described above. As seen particularly in Figures 12 and 13, the kit also comprises a support 15 arranged to receive the connecting device 1 while it is in a folded configuration. When the connecting device is in the folded configuration: the different areas of the cable 8a, 8b, 8c which are connected to the limiting means 9 are brought closer to one another by a distance less than a maximum distance of relative distance from these zones; and - the cable 7 is wound on itself to delimit a central zone Zc free passage.

Ideally, in folded configuration, the spacing distance of the ends 7a, 7b of the cable 7 is less than 80% of the maximum spacing distance of these ends 7a, 7b when the device is unfolded (that is to say when the areas of the cable connected to the limitation means are the most distant from each other). In other words, the length of the binding device when folded is less than at least 80% of its length when unfolded (i.e. when the cable areas are furthest apart from each other ), which facilitates the storage of the device 1. As can be seen in particular in FIGS. 12 and 13, the support 15 has an opening 16 for the passage of a rectilinear tool 17 belonging to said connection kit 14. This rectilinear tool 17, visible in Figure 14, is arranged to hook to a portion of the device 1 closer to the second end of the cable 7b than the first end of the cable 7a. The tool 17 slides in the free passage zone Zc of the support and makes it possible to move the first and second ends of the cable 7a, 7b away from each other. The support is U-shaped or box-shaped with an opening allowing both the passage of the rectilinear tool 17 and the passage of the connecting device when it is extended to place it in the recesses of the structures 3, 4. As seen in FIGS. 12 and 13, the U-shaped support has lateral elastic hooks to prevent the cable from deploying under its own elasticity and to allow unfolding under the effect of the pulling force generated with the tool. This support also has an opening 16 formed at its base. This opening extends parallel to the axis of symmetry of the U forming a tube 18. The folded cable 7 is wound around the tube 18 which thus avoids entanglement loops 10 of the cable. This tube 18 to: - a function of centering the cable before the deployment of the cable out of the support; and a function for guiding the tool through the opening 16.

As illustrated in FIG. 12, the kit according to the invention may also comprise a box 21 for storing the support on which the cable is wound. This box 21, detailed in Figure 15, may be cardboard and have a clean opening 22 pre-cut on one of its faces to allow the device to pass when deployed in the recesses of the borders. The pre-cutting is in the form of a rectangle whose sides are respectively parallel to the edges of the face carrying the opening 22, with in addition a central pre-cutting to facilitate the passage of the tool 17 through this face. On a face opposite to that carrying the pre-cut opening 22, there is a sliding opening 32 of the rectilinear tool 17 in the box 21 to stretch the cable 7 (shown in phantom and also visible through openings 32, 33a, 33b) and out of the box 21. On the same face 36, the box 21 may comprise two openings 33a, 33b respectively placed on either side and at a distance from the opening 32. These openings 33a, 33b make it possible to visualize the cable deployed in the recesses of the structures. It is thus possible to guide the tool 17 which is visible to the operator via these openings 33a, 33b. These openings 33a and 33b are respectively formed by partially cutting portions of the wall 36 to form tabs 35a, 35b extending into the box 31 inside the loops 10 of the folded cable 7. These tabs 35a, 35b have each side connected to the wall 36 to pivot via this connection to the inside of the box 21 and thus separate the loops 10 from each other during the deployment of the device 1. The advantage of such a box 21 is that the device is easily stored and remains protected until the moment of its use (the tabs 35a and 35b can remain closed until the moment when it is desired to deploy the device 1).

The invention finally relates to a manufacturing mechanism 23 of the connecting device 1. This mechanism 23 comprises a main part 24 (here it is a prismatic part 24) on which are rotatably mounted coils B1 and B1. on which are wound flexible links 11. This main part 24 is rotatably mounted along an axis XX relative to another coil B2 carrying the cable 7. The main part carries winding means 25 of the cable 7 from its coil B2. Thus, by pivoting the main part 24 along its axis XX with respect to the cable-carrying coil B2, the cable 7 is wound around the winding means 25. The manufacturing mechanism 23 further comprises an assembly tool 29 with links the cable 7 as its winding around the winding means 25. The assembly tool 29 may for example be a welding head movable between a position in which it is in contact with a link unrolled and the cable 7 and a remote position allowing free rotation of the main part 24 relative to the welding head 29. Finally the manufacturing mechanism 23 may also include a mobile press 30 for selectively compressing a portion of cable against one of the means of winding 25, thereby plastically bending the cable and preform the curvature of the loops 10. Ideally the most pronounced curvature of the cable are at the loops 10 and are all p laced in the same plane, thus facilitating the insertion of the device 1 between the prefabricated structures. This manufacturing mechanism 23 also comprises two guides formed through the piece 24 (wire guides) to position the links opposite the cable 7 and in the axis of the welding head 29 to thus allow the connections of the cable 7 wound with the flexible links 11. To generate the connecting device 1 by means of the manufacturing mechanism 23, the main part 24 is pivoted by half a turn, which leads to the winding of a length of cable 7 around the winding means 25. Then the cable is pressed to preform a loop 10 and the welding head 29 is lowered to make a connection between the cable 7 and a link 11. Then the welding head 29 is raised, the moving press 30 is moved aside and the main part 24 is rotated by half a turn, leading to the winding of a new length of cable 7. The press is then advanced to press the cable and form a new loop 10. Finally, the welding head 29 is lowered again. We realize a new assembly of a link 11 with a new zone of the cable 7. These operations are repeated several times until a length of the device 1 is sufficient to extend over the entire length of the borders to be connected.

The invention is not limited to the above, in particular the welding head 29 may be replaced by any means for making an assembly between the link and a cable area. For example, the welding head can be replaced by gluing or crimping or ligation means. The connecting device 1 has been presented to bond together prefabricated structures with rods 20 extending through the recesses of the borders, but it is also possible to use this connecting device 1 to connect together structures with borders recesses having no rods 20 through the recesses. Note that the connecting device may also include a plurality of cables each having at least two loops placed on either side of a general direction of the device. Finally, it is noted that the ends 7a, 7b of the cable 7 designate the portions of the cable which, in the general direction of the device 1, are furthest apart from each other. The cable may have a strand shape cut at its ends 7a, 7b or be formed of a closed loop on itself. In the latter case the ends 7a, 7b of the cable are the portions of the closed loop-shaped cable which are furthest apart from each other when the cable areas 8a, 8b, 8c are furthest apart from each other. others (ie when the device is stretched to the maximum with its flexible links stretched). Note that it is also possible, after having introduced the connecting device 1 of the invention so that a portion of its loops 10 pass between rods 20 of one of the prefabricated structures and another part of its loops pass between the rods 20 of the other of these prefabricated structures, to introduce a first keybar through the loops present in one of the prefabricated structures and a second keybar through the loops present in the other prefabricated structures. Each of these keying bars preferably extends parallel to the recessed edges and is positioned so that in case of traction on the loops of the cable, to remove them from the recess where they are located, the keybar comes to bear against the rods 20 to prevent the withdrawal of loops out of the prefabricated structure where they are. Each keybar has the further advantage of forming a reinforcement between the walls of the structure that receives them and solidifies the connection between the structures. Finally, the tool 17 for deploying the device 1 may have any shape allowing a,. 2986545 19 gripping part of the cable to lengthen it. Thus, the tool 17 may have a forked end to receive a loop 10 of the cable or hook assembled to the cable 7 or a loop connected to the various flexible links 5 (the flexible links may be steel ropes). From the point of view of dimensioning, the flexible links are connected to the cable so that the zones of the cable which are adjacent to each other are spaced apart from each other by a constant pitch (when measured in the general direction of the device), this step corresponding to the pitch between the rods 20 of the structures. Typically the pitch between two adjacent loops is 15 cm, and the pitch between adjacent rods 20 of the same structure 3, 4 is also 15cm. In such a case each loop 10 of the cable measured between two linkage areas with the links is formed of a cable length of 85 CM. The invention also relates to an assembly 19 comprising two prefabricated structures 3, 4 each comprising at least one rectilinear recessed edge 5, 6, these recessed edges of the respective prefabricated structures being adjacent to each other. The assembly 19 comprises a connecting device 1 according to any one of the aforementioned modes. At least some of the loops 10 formed by the cable 7 penetrating at least partially within the rectilinear recessed edge of one of the prefabricated structures 3 and some other loops 10 formed by the cable 7 penetrating at least partially to the The assembly 19 further comprises a binder such as cement disposed between these prefabricated structures 3, 4, and inside each of the recesses of the borders. rectilinear 5, 6, this binder surrounding at least some of the loops 10 of said cable 7.

Claims (9)

REVENDICATIONS1. Connecting device (1) for connecting two prefabricated structures (3, 4) having rectilinear recessed edges (5, 6) extending opposite one another, characterized in that the device (1) comprises: - a flexible cable (7) having first and second end ends (7a, 7b) between which are located cable areas (8a, 8b, 8c) spaced apart from each other along the cable (7); spacing limitation means (9) of the zones of the cable relative to each other, these limiting means (9) being connected to said zones (8a, 8b, 8c) so that when these zones are separated the most the cable (7) forms a plurality of loops (10) which extend respectively between the regions of the cable and are arranged to be able to penetrate at least partially inside said recessed edges when the cable (7) is disposed between the two prefabricated structures (3, 4) so that a straight line passing through its ends (7a, 7b) extends substantially along these edges (5, 6). 2. Device (1) according to claim 1, wherein the limiting means (9) are connected to the different areas (8a, 8b, 8c) of the cable (7) so that when these areas are spaced apart as much as possible. others, the majority of loops (10) thus formed have the same shape and are arranged at regular intervals along the cable (7). 3. Connecting device according to any one of claims 1 or 2, wherein the limiting means (9) comprise: - at least one flexible link (11) having a maximum length, measured between the ends of the flexible link, which is less than 20%, preferably at least 50%, less than the maximum length of the cable (7) measured between its first and second ends (7a, 7b); and - a plurality of means (12) for assembling the flexible link with the cable, these assembly means being fixed along the link (11) and each at a corresponding zone of the cable (7). 4. Connecting device according to claim 3, comprising a plurality of flexible links (11) distributed symmetrically around a general direction of the device (1). 5. Connecting device according to any one of the preceding claims, wherein when the zones (8a, 8b, 8c) of the cable (7) connected to the connecting means (9) are separated as much as possible from each other, the device comprises a rectilinear recessed zone (Z) extending between the first and second ends (7a, 7b) of the cable, this recessed area (Z) being arranged to allow the passage of a rectilinear tool (17) forcing the spacing the second end (7b) of the cable (7) relative to the first end (7a) of the cable (7). 6. Connecting device according to any one of claims 1 to 2, wherein the limiting means (9) comprise: - at least one rigid bar (13) having a length measured between the ends of the flexible cable, which is less than 20%, preferably at least 50% of the maximum length of the cable (7) measured between its first and second ends (7a, 7b); and several assembly means (13a, 13b, 13c, 13d) of the rigid bar (13) with the cable (7), these assembly means being fixed along the bar (13) and each at a distance corresponding zone (8a, 8b, 8c) of the cable. 7. Connection kit (14) for making a connection between two prefabricated structures (3, 4) each comprising at least one rectilinear rim (5, 6), characterized in that it comprises at least one connecting device (1 ) according to any one of claims 1 to 6 and a support (15) arranged to receive the connecting device (1) while in a folded configuration in which: - the different areas of the cable (8a, 8b, 8c) which are connected to the limiting means (9) are brought closer to one another by a distance less than a maximum distance of relative spacing of these zones; and wherein - the cable (7) is wound on itself to define a central zone (Zc) free passage. 8. Kit link (14) according to claim 7, wherein the support (15) arranged to receive the connecting device (1) while in a folded configuration comprises an opening (16) for the passage of a rectilinear tool (17) belonging to said connecting kit (14), this rectilinear tool (17) being arranged to hook to a portion of the device (1) closer to the second end of the cable (7b) than to the first end of the cable (7a) and slide in the free passage area (Zc) so as to move away from each other these first and second ends of the cable (7a, 7b). 9. Assembly (19) comprising two prefabricated structures (3, 4) each comprising at least one rectilinear recessed edge (5, 6), these recessed edges of the respective prefabricated structures being adjacent to each other, the whole ( 19) being characterized in that it further comprises a connecting device (1) according to any one of claims 1 to 6, at least some of the loops (10) formed by the cable (7) penetrating at least partially to the the interior of the rectilinear recessed edge of one of the prefabricated structures (3) and some other loops (10) formed by the cable (7) penetrating at least partially inside the straight recessed edge of the other prefabricated structures (4), the assembly (19) 10 further comprising a binder such as cement disposed between these prefabricated structures (3, 4), and inside each of the recesses of the rectilinear edges (5, 6). ), this binder surrounding some at least loops (10) of said cable (7).