Double support fixing device for formwork construction

Abstract

The present invention relates to a fixing device (1) configured to ensure the fixing of an external functional element to a formwork structure (2), said structure comprising a first formwork element (3A) and a second formwork element (3B). The fixing device (1) comprises an internal part (4) configured to be at least partially embedded in the formwork structure (2), the internal part (4) comprising a first part (6) defining an externally opening receiving area with a first periphery (13), a retaining element (8), a second part (7) comprising a second periphery configured to contact a second inner side (14B) of the second formwork element (3B), and a fixing part (9) defining a first fixing element, and the fixing device (1) comprises an external part comprising a second fixing element configured to be fixed to the fixing part of the internal part (4).

Description

[Technical Field]

[0001] The present invention relates to the construction sector, and more particularly to a fastening device intended to ensure the fastening of an external functional element to a formwork structure, such as a formwork wall or a formwork slab, which is obtained by injecting and hardening an injection fluid inside a formwork extending substantially parallel to its extension axis and comprising at least one formwork element, such as a formwork panel. [Background technology]

[0002] It is well known from the prior art to cover the exterior of buildings made of concrete walls with cladding or facing materials in order to obtain a desired finish level or, for example, also to increase thermal and / or sound insulation. Covering with cladding or facing materials is usually carried out by drilling holes in the exterior surface of the concrete wall and then inserting a number of retention mechanisms. Although simple in design, this technical solution has the drawback of being time-consuming and labor-intensive, especially for work on the construction site. Summary of the Invention

[0003] The technical problem underlying the present invention is to provide a fastening device that is ergonomic, easy to use and economical, and that in particular allows for the fastening of external functional elements to structures obtained by injection into formwork panels.

[0004] To this end, the present invention provides 1. A fastening device configured to ensure fastening of an external functional element to a formwork structure, such as a formwork wall or a formwork slab, comprising: the formwork structure is obtained by pouring and hardening an injection fluid into a formwork extending substantially parallel to an elongation axis and including at least one first formwork element, such as a formwork panel, and one second formwork element; the securing device comprises an internal component configured to be at least partially embedded in the formwork structure; The internal components are: a) a first portion defining an outwardly opening receiving area at a first periphery; b) a retaining element configured to contact a first inner side of the first formwork element during the pouring, the retaining element being capable of occupying an insertion position in which all or part of the retaining element is inserted into a part of the receiving area, the retaining element being configured to be removable from the receiving area; c) a second portion including a second periphery configured to contact a second inner surface of the second formwork element; d) a fixing part configured to be accessible from outside the formwork structure after the pouring fluid has hardened and the formwork has been removed, the fixing part defining at least one first fixing element; Equipped with the fixation device further comprises an outer component including a second fixation element configured to be fixed to the fixation portion of the inner component, the outer component configured to hold the outer functional component in position relative to the inner component. Regarding the fixing device.

[0005] The fixing device thus allows for the attachment and holding in place of external functional elements on the formwork structure without drilling or attaching fixing or adhesive elements after the injected fluid in the formwork has hardened.

[0006] Furthermore, before carrying out the injection of the injection fluid into the formwork, the internal parts are integrated into the formwork structure, thereby making it possible to optimize the pull-out resistance of the internal parts within the formwork structure once the building material has fully hardened.

[0007] The fixation device may further have one or more of the following features, either alone or in combination:

[0008] According to an embodiment of the invention, the external functional element may be, for example, a cladding element, a plasterboard, a soundproofing and / or thermal insulation panel, a scaffolding element, a rod, a casing, a beam, a stile or a slab.

[0009] According to an embodiment of the invention, the second locking element is configured to be fixed by form-fit with the first locking element.

[0010] According to one embodiment of the invention, the first peripheral edge is configured to seal the injection fluid against the receiving area, the first peripheral edge being parallel to the extension axis and substantially contained in a contact plane intended to contact the first inner side of the first formwork element.

[0011] In one embodiment of the invention, when the retaining element is in the inserted position, the retaining element is flush with the first rim along the contact plane.

[0012] According to one embodiment of the invention, when the retaining element is in the insertion position, the retaining element protrudes relative to the first peripheral edge, so that the retaining element is in contact with the first formwork element without the peripheral edge contacting the first formwork element.

[0013] According to one embodiment of the invention, when the holding element is in the inserted position, the first peripheral edge projects relative to the holding element, so that the first peripheral edge is in contact with the first formwork element.

[0014] According to an embodiment of the invention, when the retention element is in the inserted position, the retention element is configured to provide an injection fluid seal against the receiving area.

[0015] According to an embodiment of the invention, the retaining element is configured to at least partially block communication between the receiving area and an exterior of the first part when the retaining element occupies the insertion position.

[0016] According to one embodiment of the invention, the retaining element is configured to be completely removable from the rest of the internal part, and preferably the retaining element is removed so that it can be reused between subsequent implementations of the invention.

[0017] According to one embodiment of the invention, the second peripheral edge is configured to seal the injection fluid against the fixed part, the second peripheral edge being parallel to the extension axis and substantially contained in a plane intended to contact the second inner side of the second formwork element during injection.

[0018] According to one embodiment of the invention, the first locking element is a locking orifice and the second locking element is a male element that can occupy a locking position by being inserted into said at least one locking orifice following a lateral movement relative to the extension axis, the locking orifice and the male element respectively defining a first retention element and a second retention element of the same retention mechanism, said first retention element and said second retention element being complementary and able to cooperate with each other such that the retention mechanism ensures the locking of the male element in its locking position within the at least one locking orifice.

[0019] According to one embodiment of the invention, the second locking element is a locking orifice and the first locking element is a male element that can occupy a locking position by being inserted into said at least one locking orifice following a lateral movement relative to the extension axis, the locking orifice and the male element respectively defining a first and a second retention element of the same retention mechanism, said first and second retention elements being complementary and able to cooperate with each other such that the retention mechanism ensures the locking of the male element in its locking position within the at least one locking orifice.

[0020] According to some embodiments of the present invention, the first and second locking elements may be hermaphroditic locking elements, i.e. elements having both male and female elements.

[0021] According to an embodiment of the invention, the holding element is at least partly made of a ferromagnetic element, such as a magnet.

[0022] According to an embodiment of the invention, the formwork elements are at least partly made of magnetic material. Preferably, the retaining elements are magnetically held in position on the inner faces of the formwork elements.

[0023] According to an embodiment of the invention, the fixed portion is disposed within an interior space defined by the second portion.

[0024] According to one embodiment of the invention, the fixed portion is part of the same assembly as the internal component, thus forming a single piece assembly.

[0025] According to one embodiment of the invention, the fixed portion is mounted within the second portion so as to be displaceable along at least one direction parallel to the extension axis.

[0026] According to one embodiment of the invention, the fixed portion is mounted within the second portion so that it can be displaced in any direction on an axis parallel to the extension axis.

[0027] According to one embodiment of the invention, the fixed part is mounted within the second part so as to be displaceable along at least one direction oriented transversely to the extension axis.

[0028] According to an embodiment of the invention, the fixation device further includes a movement system disposed between the second part and the fixed part, the movement system being configured to exert a restoring force on the fixed part towards a nominal position of the fixed part and to allow the fixed part to shift relative to the second part.

[0029] According to an embodiment of the present invention, the movement system comprises at least one resilient deformable fin.

[0030] According to an embodiment of the invention, the fixing portion further comprises a conical portion, the conical portion comprising an apex that opens freely inside the first fixing element.

[0031] According to one embodiment of the invention, the fixation device further includes a crown mechanically connecting the first and second portions, the crown configured to elastically deform between a free position and a stressed position.

[0032] According to an embodiment of the invention, the extension of the crown may be preset according to at least two preset positions, said preset positions corresponding to different initial lengths of the fixation device when it occupies a free state.

[0033] By free state is meant a configuration in which the fixation device is not subjected to any mechanical tensile or compressive stress.

[0034] According to one embodiment of the invention, the second part defines an external abutment surface, said abutment surface being configured to prevent the fixing device from detaching from the formwork structure when tension is applied to the fixing part.

[0035] According to one embodiment of the invention, the abutment surface is annular and / or frustoconical in shape.

[0036] According to an embodiment of the invention, the fixing part of the fixing device is configured to be visible from outside the formwork structure when at least one formwork element has been removed after pouring and hardening of the formwork structure, so that the position of the fixing part can be easily identified with the naked eye, for example by photogrammetry or remote sensing.

[0037] According to some embodiments of the present invention, the injection fluid may be, for example, concrete, resin, soil, plaster, or styrofoam.

[0038] According to certain embodiments of the present invention, the infusion fluid may be reinforced by a reinforcement element embedded in the infusion fluid.

[0039] According to an embodiment of the invention, the reinforcement element is configured to arrange one or more fixing devices relative to at least one formwork element.

[0040] According to an embodiment of the invention, the fixing device comprises a positioning element, such as a fixing clip, which is provided on the fixing part of the internal part and configured to be fixed to the reinforcement element. Advantageously, such a configuration of the invention makes it possible, on the one hand, to facilitate the attachment of the fixing device in the formwork and, on the other hand, to increase the mechanical pull-out resistance of the internal part in the formwork structure after hardening of the casting fluid. [Brief explanation of the drawings]

[0041] The present invention will be better understood from the following description taken in conjunction with the accompanying drawings, in which identical reference numbers correspond to structurally and / or functionally identical or similar elements. [Figure 1] FIG. 1 is a partial side view of a formwork structure with internal components of a fastening device according to one embodiment of the present invention. [Figure 2] FIG. 2 is a side cross-sectional view of an internal component according to the embodiment of FIG. [Figure 3] 3 is a side cross-sectional view of an external portion cooperating with an internal component according to the embodiment of FIG. [Figure 4] FIG. 4 is a top view of the internal components according to one variation of the embodiment of the present invention. [Figure 5] FIG. 5 is a side cross-sectional view of an internal component according to a modification of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0042] 1-3 show all or part of a fastening device 1, which is intended to ensure the fastening of an external functional element to a formwork structure 2, such as a formwork wall or a formwork slab. The formwork structure 2 extends substantially parallel to an extension axis A1 and is obtained by pouring and hardening a grouting fluid into a formwork comprising at least one first formwork element 3A and one second formwork element 3B, such as a formwork panel. By grouting fluid is meant any material suitable for use in the construction sector, such as concrete, resin, earth, plaster, or expanded polystyrene. The grouting fluid can also be reinforced by reinforcing elements embedded in the grouting fluid.

[0043] By external functional elements is meant elements intended to completely or partially cover the formwork structure 2, such as, for example, cladding elements, plasterboard, soundproofing and / or thermal insulation panels, scaffolding elements, rods, casings, beams, stiles or slabs.

[0044] The fixing device 1 comprises an internal part 4 intended to be embedded in the formwork structure 2, and an external part 5, which makes it possible to ensure the retention of the external element functions relative to the internal part 4. The fixing device 1 thus makes it possible to mount and hold in place the external functional element on the formwork structure 2 without drilling or the installation of fixing or adhesive elements after the injection fluid in the formwork has hardened. Furthermore, the internal part 4 is integrated into the formwork structure 2 before the injection of the injection fluid into the formwork is carried out, which makes it possible to optimize the pull-out resistance of the internal part 4 within the formwork structure 2 once the building material has completely hardened.

[0045] In one embodiment of the invention shown in Figures 1-3, the internal part 4 comprises a first part 6, a second part 7, a retaining element 8 and a fixing part 9, the fixing part 9 defining a first fixing element 10 configured to cooperate by form-fitting with a second fixing element 11 provided on the external part 5.

[0046] The first part 6 defines an internal receiving area 12 that opens outward at a first peripheral edge 13. The first peripheral edge 13 extends opposite a first inner side 14A of the first formwork element 3A and is configured to be substantially parallel to the contact plane PC.

[0047] In one embodiment of the invention, the retaining element 8 is made at least in part of a ferromagnetic element, such as a magnet, and the first formwork element 3A is made at least in part of a magnetic material such that, during injection, the retaining element 8 is magnetically held in position on the first inner side 14A of the first formwork element 3A. The retaining element 8 is configured to alternately occupy an insertion position, in which it is inserted inside the receiving area 12 to block fluid communication between the receiving area 12 and the outside of the first part 6, and a removal position, in which the retaining element 8 is configured to be removable from the receiving area 12. Preferably, the retaining element 8 is removed after the injected fluid has solidified so that it can be reused between subsequent implementations of the invention.

[0048] According to the embodiment of the invention as shown in the figures, the retaining element 8 is flush with the first peripheral edge 13 in the contact plane PC and is in contact with the first inner side surface 14A of the first formwork element 3A. However, according to other embodiments of the invention not shown in the figures, it is conceivable that when the retaining element 8 is in the inserted position, the retaining element 8 projects together with the first peripheral edge 13, so that the retaining element 8 comes into contact with the first formwork element 3A. It is also conceivable that when the retaining element 8 is in the inserted position, the peripheral edge projects together with the retaining element 8, so that the first peripheral edge 13 comes into contact with the first formwork element 3A.

[0049] The second portion 7 of the internal part 4 includes a second peripheral edge 15 configured to contact the second inner side 14B of the second formwork element 3B. The second peripheral edge 15 is configured to seal the injection fluid against the fixing part 9. The second peripheral edge 15 is parallel to the extension axis A1 and is substantially contained in a plane intended to contact the second inner side 14B of the second formwork element 3B during injection. Furthermore, the second portion 7 defines an abutment surface 16 on its exterior. The abutment surface 16 is configured to prevent the fixing device 1 from coming off the formwork structure 2 when a tensile force is applied to the fixing part 9. The abutment surface 16 may be annular and / or frustoconical, or have another shape, depending on the desired geometric shape of the fixing device 1.

[0050] The fixing portion 9 is arranged in the interior space defined by the second portion 7. The fixing portion 9 further comprises a conical portion 17, which comprises an apex that opens freely inside the first fixing element 10. In other words, the apex of the conical portion 17 is the part with the smallest cross section. The conical portion 17 thus converges towards the first fixing element 10 and opens towards the second peripheral edge 15. The fixing portion 9 of the fixing device 1 is configured so as to be visible from outside the formwork structure 2 when the formwork element is removed after the pouring and hardening of the formwork structure 2. Thus, the position of the fixing portion 9 can be easily identified with the naked eye, for example by photogrammetry or remote sensing.

[0051] According to the embodiment of the invention shown in Figures 1-3, the first locking element 10 is a locking orifice and the second locking element 11 is a male element that can be inserted inside the locking orifice and assume a locking position following a lateral movement relative to the contact plane PC. The locking orifice and the male element respectively define the first and second retention elements of the same retention mechanism, which are complementary and can cooperate with each other so that the retention mechanism ensures the locking of the male element in its locking position within the at least one locking orifice. According to an embodiment of the invention not shown in the figures, the first locking element 10 and the second locking element 11 may be hermaphroditic locking elements, i.e. elements having both a male element and a female element.

[0052] The fixing device 1 further includes a movement system 18 arranged between the second part 7 and the fixed part 9 of the internal part 4. The movement system 18 is configured to exert a restoring force on the fixed part 9 towards its nominal position. The movement system 18 is configured to allow the fixed part 9 to be displaced in any direction relative to the second part 7 in a plane parallel to the contact plane PC. Furthermore, the movement system 18 can be displaced along a direction transverse to the contact plane PC. The movement system 18 is formed by a plurality of fins 19, each of which is elastically deformable.

[0053] The internal part 4 further comprises a crown 20 configured to mechanically connect the first part 6 and the second part 7. The crown 20 is configured to deform, e.g., elastically, between a free position and a stressed position. The elongation of the crown 20 can be preset according to at least two preset positions 21. The preset positions 21 correspond to different initial lengths of the fixation device 1 when it occupies a free state. The free state means a configuration in which the fixation device 1 is not subjected to any mechanical tensile or compressive stress.

[0054] 4 and 5 show a variant of the embodiment of the invention. This variant differs in that the fixed part 9 of the internal part 4 includes a plurality of first fixed elements 10. It also differs in that the fixed part 9 is part of the same assembly as the second part 7, thus forming a single-piece assembly. Advantageously, this variant makes it possible to adjust the position of the second fixed elements 11 without using a movable compensation system, such as the movement system 18 shown in FIGS. 1-3.

[0055] According to one embodiment of the invention shown in the figures, the fixing device 1 comprises a positioning element, e.g. a fixing clip, which is provided on the fixing part 9 of the internal part 4 and is configured to be fixed to the reinforcement element. The reinforcement element is then configured to position the fixing device(s) 1 relative to the first formwork element 3A and / or the second formwork element 3B.

[0056] Advantageously, such a configuration of the invention makes it possible, on the one hand, to facilitate the installation of the fixing device 1 in the formwork, and, on the other hand, to increase the mechanical pull-out resistance of the internal part 4 in the formwork structure 2 after hardening of the casting fluid.

[0057] Of course, the invention is not limited to the described and illustrated embodiments, which are given by way of example only: modifications are possible, particularly with regard to the arrangement of the various elements or by the substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

1. A fastening device (1) configured to ensure the fastening of an external functional element to a formwork structure (2), such as a formwork wall or a formwork slab, comprising: The formwork structure (2) extends substantially parallel to an elongation axis (A1) and is obtained by pouring and hardening an injection fluid inside a formwork comprising at least one first formwork element (3A) such as a formwork panel and one second formwork element (3B); The fixing device (1) comprises an internal part (4) adapted to be at least partially embedded in the formwork structure (2), The internal part (4) is a) a first part (6) defining therein a receiving area (12) that is open to the outside at a first peripheral edge (13); b) a retaining element (8) configured to contact the first inner surface (14A) of the first formwork element (3A) during the pouring, the retaining element (8) being capable of occupying an insertion position in which all or part of the retaining element (8) is inserted into a part of the receiving area (12), and the retaining element (8) being configured so that it can be removed from the receiving area (12); c) a second part (7) including a second peripheral edge (15) adapted to contact the second inner surface (14B) of said second formwork element (3B); d) a fixing part (9) configured to be accessible from outside the formwork structure (2) after the pouring fluid has hardened and the formwork has been removed, the fixing part (9) defining at least one first fixing element (10); Equipped with The fixation device (1) further comprises an outer part (5) including a second fixation element (11) configured to be fixed to the fixation portion (9) of the inner part (4), the outer part (5) being configured to hold the outer functional element in position relative to the inner part (4). Fixation device (1).

2. the first rim (13) is configured to seal the injection fluid against the receiving area (12); the first peripheral edge (13) is parallel to the extension axis (A1) and is included in a contact plane (PC) intended to contact the first inner side surface (14A) of the first formwork element (3A); A fixing device (1) according to claim 1.

3. When the retaining element (8) occupies the insertion position, the retaining element (8) is flush with the first peripheral edge (13) along the contact plane (PC). A fixing device (1) according to claim 2.

4. When the holding element (8) is in the inserted position, the holding element (8) projects relative to the first peripheral edge (13), so that the holding element (8) is in contact with the first formwork element (3A) without the peripheral edge being in contact with the first formwork element (3A). A fixing device (1) according to claim 1.

5. When the holding element (8) occupies the insertion position, the holding element (8) is configured to seal the injection fluid against the receiving area (12). A fixing device (1) according to any one of claims 1-4.

6. the second rim (15) is configured to seal the injection fluid against the fixed part (9); the second peripheral edge (15) is contained in a plane parallel to the extension axis (A1) and intended to come into contact with the second inner face (14B) of the second formwork element (3B) during pouring; A fixing device (1) according to any one of claims 1-5.

7. said at least one first stationary element (10) being a stationary orifice; said second locking element (11) being a male element capable of assuming a locking position by being inserted into said at least one locking orifice following a lateral movement relative to said extension axis (A1); the fixed orifice and the male element respectively define a first retention element and a second retention element of the same retention mechanism; the first and second retention elements are complementary and can cooperate with each other such that the retention mechanism ensures fixation of the male element in its fixed position within the at least one fixation orifice; A fixing device (1) according to any one of claims 1-6.

8. the holding element (8) is at least partially made of a ferromagnetic element, such as a magnet, A fixing device (1) according to any one of claims 1-7.

9. The fixed part (9) is arranged in an internal space defined by the second part (7). A fixing device (1) according to any one of claims 1-8.

10. the fixed part (9) is mounted within the second part (7) so as to be displaceable along at least one direction parallel to the extension axis (A1); A fixing device (1) according to any one of claims 1-9.

11. The fixed part (9) is mounted within the second part (7) so that it can be displaced in any direction on an axis parallel to the extension axis (A1); A fixing device (1) according to claim 10.

12. the fixed part (9) is mounted within the second part (7) so as to be displaceable along at least one direction oriented transversely to the extension axis (A1); A fixing device (1) according to any one of claims 1-11.

13. a movement system (18) disposed between said second part (7) and said fixed part (9); the movement system (18) is configured to exert a restoring force on the fixed part (9) towards its nominal position and to allow displacement of the fixed part (9) relative to the second part (7); A fixing device (1) according to any one of claims 10-12.

14. The movement system (18) comprises at least one elastically deformable fin (19). A fixing device (1) according to any one of claims 1-13.

15. The fixed portion (9) further comprises a conical portion (17), The conical portion (17) includes an apex that opens freely inside the first fixing element (10). A fixing device (1) according to any one of claims 1-14.

16. a crown (20) mechanically connecting the first portion (6) and the second portion (7); The crown (20) is configured to elastically deform between a free position and a stressed position. A fixing device (1) according to any one of claims 1-15.

17. The extension of said crown (20) can be preset according to at least two preset positions (21), The preset positions (21) correspond to different initial lengths of the fixation device (1) when the fixation device (1) occupies a free state. A fixing device (1) according to any one of claims 1-16.

18. The second part (7) defines an external abutment surface (16), The abutment surface (16) is configured to prevent the fixing device (1) from coming off the formwork structure (2) when tension is applied to the fixing part (9). A fixing device (1) according to any one of claims 1-17.

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