Fastening system

Abstract

The invention relates to a fastening system (100) comprising: - a U-shaped main body (200) which comprises an upper leg (201), a lower leg (202) and a transverse base (203), the main body (200) also comprising at least one lateral tab (204, 205) configured to bear, via a contact face (204a, 205a), against a front face of a panel (1); - a holding plate (300) connected to the lower leg (202) by a tightening rod (400) configured to allow adjustment of the distance between the holding plate (300) and the upper leg (201).

Description

Attachment system FIELD OF INVENTION

[0001] The present invention relates to the field of fastening means, and more particularly to means of fastening panels, for example solar panels, onto rails.

[0002] In particular, the invention relates to a fastening system for fixing panels onto rails. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0003] US9160273 discloses a mounting kit for attaching a panel, including a solar panel, to a rail. As illustrated in US9160273, the mounting kit includes a retaining element 31, a bolt 30, and a sliding element 1.

[0004] In operation, the assembly formed by these three elements is positioned between two adjacent panels resting on a rail 8. More specifically, the assembly comprises, in order and starting from the rail, the sliding element 1, the bolt 30, and the retaining element 31. The retaining element 31 comprises a metal plate having opposing edges, called retaining edges, each designed to be held tightly against an upper peripheral portion 36 of the frame of two adjacent panels. The sliding element 1 is connected to the rail 8 by a sliding mechanism, and the bolt 30 ensures that the two retaining edges are held tightly. In particular, the bolt 30, passing through the retaining element, is screwed into a tapped hole in an upper portion of the sliding element 1, in order to allow the retaining element to be tightened against each of the two adjacent panels.

[0005] Document EP2867541 proposes a fastening device to overcome these problems. This fastening device is a single unit and is equipped with ratcheting means for engaging with the rail.

[0006] One aim of the present invention is to provide a system for attaching a panel to a rail. BRIEF DESCRIPTION OF THE INVENTION

[0007] The present invention relates to a fastening system for holding a panel, by one of its faces called the rear face, onto a first face of a rail, the fastening system comprising:

[0008] - a U-shaped main body comprising an upper and a lower branch, and a transverse base connecting the lower and upper branches, the main body also includes at least one lateral fin configured to bear, by a face called the contact face, against a front face, opposite to the rear face, of the panel;

[0009] - a retaining plate, positioned between the upper and lower branches, and linked to the lower branch by means of a clamping rod, the clamping rod being configured to allow adjustment of the distance between the retaining plate and the upper branch, and thus allow clamping of the panel against the first face of the rail, by pressing the retaining plate against a second face of the rail opposite the first face, and pressing a lateral fin against the front face of said panel.

[0010] According to one embodiment, at least one lateral fin comprises two lateral fins extending in two opposite directions from the upper branch, the lateral fins being configured to be supported, by a face called the contact face, against, respectively, one and the other of the front faces, opposite the rear faces, of two adjacent panels and between which the main body is disposed.

[0011] According to one embodiment, the clamping rod passes through the lower branch, and is attached, by a free end, to the retaining plate.

[0012] According to one embodiment, the main body comprises two essentially parallel side walls laterally delimiting the lower branch, the transverse base and the upper branch, the lower branch also comprising a bottom, called the lower bottom, connecting the two side walls, each side wall comprising a free edge which extends continuously and internally delimits the lower branch, the transverse base and the upper branch.

[0013] According to one embodiment, the transverse base comprises two sections, called transverse sections, forming a transverse bottom, and folded towards each other, and each transverse section extending from an edge of one of the side walls opposite the free edge, and in which the lower bottom is extended by two folded strips and each resting against an inner face of one of the transverse sections.

[0014] According to one implementation method, the upper branch comprises at its free end two sections, called end sections, opposite to the cross sections, and folded towards each other.

[0015] According to one embodiment, the clamping rod includes a thread, the lower bottom includes a threaded barrel configured to cooperate with the clamping rod.

[0016] According to one embodiment, each lateral fin includes points projecting from the contact face so as to be able to scratch the front face when said lateral fin is in contact with said front face.

[0017] According to one embodiment, each lateral fin includes folded tabs ending in one of the points.

[0018] According to one embodiment, the retaining plate comprises a central section, essentially flat, and two lateral sections extending on either side of the central section, the lateral sections being configured to allow for spring-effect retention between two lateral faces of the rail.

[0019] According to one implementation method, the retaining plate is configured to allow insertion into a rail via its second face.

[0020] According to one method of implementation, each lateral section has a convex shape on the face, called the interlocking face, through which it is intended to be interlocked.

[0021] According to one embodiment, each lateral section comprises, from the central section to an edge, a first wall perpendicular to the central section, a second wall perpendicular to the first wall, and a spring wall, advantageously the spring wall comprises, from the second wall, a first spring section and a second spring, the first two spring sections extending convergently in the direction from the lower branch to the upper branch, and two second spring sections extending divergently in the same direction.

[0022] Other features and advantages of the invention will become apparent from the detailed description that follows, with reference to the accompanying figures in which:

[0023] This is a schematic representation of a section of a panel equipped with a frame, in particular, said section is represented according to a perspective view;

[0024] Laest is a representation according to a perspective view of two chassis sections resting by their rear edge on a first face of a rail, in particular, the two chassis sections are each associated with a panel, the two panels being arranged side-by-side;

[0025] Laest is a representation of a rail according to a cutting plane perpendicular to the axis of elongation of said rail;

[0026] This is a schematic representation, and according to a perspective view, of the attachment system according to the present invention;

[0027] This is a schematic representation, and in isolation, of the main block of the attachment system, in particular the main block is represented according to a perspective view and in such a way as to be able to observe the lower bottom;

[0028] Laest is a schematic representation of the fastening system of the arranged between two chassis sections of two panels placed on a rail and adjacent to each other, in particular lare represents the fastening system according to a perspective view from the contact face and in such a way as to observe the points plumb with the front edge;

[0029] Lare represents one of the lateral fins of the main block according to a perspective view and from the contact face;

[0030] This is a schematic representation, and in isolation, of the main block of the attachment system of the, in particular the main block is represented according to another perspective view;

[0031] This is a schematic representation, and in isolation, of the main block of the attachment system, in particular the main block is represented according to a perspective view and in such a way as to be able to observe the transverse background;

[0032] This is a schematic partial representation, and in isolation, of the main block of the attachment system, in particular the main block is represented according to a perspective view and in such a way as to be able to observe the slats;

[0033] This is a schematic representation of the retaining plate of the fastening system according to a perspective view and from its top face;

[0034] This is a schematic representation of the positioning of the fastening system and in particular of the retaining plate in the rail interlocking zone and before the rail is engaged;

[0035] This is a schematic representation of a panel engaged between the upper arm and the retaining plate of a fastening system, and whose retaining plate is embedded in the interlocking area;

[0036] This is a schematic representation, and according to a perspective view, of the attachment system according to a second embodiment of the present invention;

[0037] This is a schematic representation, and according to a perspective view, of the main body of an attachment system according to a third embodiment of the present invention;

[0038] This is a schematic representation, and according to a perspective view, of the attachment system according to a fourth embodiment of the present invention;

[0039] Laest is a schematic representation of the fastening system arranged between two chassis sections of two panels placed on a rail and adjacent to each other;

[0040] This is a schematic representation, and according to a perspective view, of the attachment system according to a fifth embodiment of the present invention;

[0041] This is another view of the attachment system of the;

[0042] This is a schematic representation of the fastening system arranged between two chassis sections of two panels placed on a rail and adjacent to each other.

[0043] This is a schematic representation, and according to a perspective view, of the attachment system according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0044] The panel fastening system comprises a U-shaped main body with an upper arm, a lower arm, and a crossbar connecting the two arms. This main body is designed to be placed between two adjacent panels, ensuring stable and reliable support for them on a rail. The upper arm has two lateral fins extending from either side of the main body. These fins are designed to bear against the front faces of the panels, thus holding each panel firmly in place against the rail structure.

[0045] To secure the panel to the rail, the system includes a retaining plate positioned between the lower and upper arms of the main body. The retaining plate is connected to the lower arm by a clamping rod, which passes through it and allows adjustment of the distance between the retaining plate and the upper arm (advantageously, the clamping rod may be threaded and is referred to hereafter as a threaded rod). By rotating the threaded rod, the distance between the retaining plate and the upper arm decreases, thus tightening the panel against the rail. This precise clamping mechanism offers adjustable tension, allowing the panel, regardless of its thickness, to be held firmly against the rail.

[0046] In certain embodiments, the side fins are equipped with projecting points, extending beyond the contact face and designed to make contact with the panels. These points provide a more secure anchor, allowing the fins to grip the panel surface and enhance the overall stability. Furthermore, the fins may also be fitted with folded tabs terminating in these points, thereby increasing the holding capacity and reducing the risk of panel slippage when subjected to vibrations or other external forces. By gripping a metal frame supporting the panel, these points establish electrical contact, thus ensuring electrical continuity between the frame and the rail on which the panel rests.

[0047] The U-shaped main body features a cross base that connects the two arms of the U and, in some variations, is composed of sections folded towards each other. This reinforced cross base configuration provides additional rigidity to the system, preventing deformation and ensuring that the fastening system retains its holding power, even under significant loads. The lower arm, meanwhile, has a bottom, also designed to offer increased stability. The bottom may include a threaded section for use with the threaded rod, allowing for a secure fit and reliable fastening of the retaining plate.

[0048] The system is designed to adapt to a variety of installation conditions, offering a high degree of adjustability and enabling reliable and robust panel mounting on rails of different dimensions and characteristics. Reinforcing elements on various parts of the main body ensure good tensile and lateral force resistance, guaranteeing increased durability and consistent performance in potentially demanding environments.

[0049] Here, we can see a section of a panel 1 fitted with a frame 2 holding said panel around its entire periphery. The frame 2 includes in this respect a contour wall 2a, essentially perpendicular to the surface formed by the panel 1 and by which the panel is held to the frame 2. The contour wall 2a also includes an edge, called the front edge 3, accessible through a front face 4 of the panel 1. The frame 2 generally comprises an electrically conductive material and in particular a metal, for example aluminum.

[0050] The frame 2 also includes a return 2b which is essentially flat and folded inwards from a rear edge 6 of the contour wall 2a and accessible via a rear face 5 opposite the front face 4. The return 2b is notably flat and in a plane parallel to the plane formed by the panel 1. Furthermore, the width of the return 2b can be essentially constant around the entire perimeter of the frame 2.

[0051] Lare represents two sections of two frames 2 of two adjacent panels resting on their rear face on a first face 11 of a rail 10. It is assumed that a panel 1 resting on the rail 10 by the rear edge 6 of its frame 2 also rests on its rear face 5 on said rail 10.

[0052] Figure 1 is a schematic representation of the rail 10 along a cross-section perpendicular to its direction of elongation. In particular, the rail 10 includes a retaining section 12 on which the panel 1 is intended to be placed. More specifically, the retaining section 12 includes a retaining face 14 delimited by the first face 11 and a second face 13, opposite the first face 11. The retaining section 12 also includes two lateral faces 15 and 16, opposite each other with respect to the retaining face 14, and extending laterally from said retaining face 14 in a direction opposite to the first face 11. More specifically, the retaining face and the two lateral faces 15 and 16 form a slotted area 17 into which a retaining plate, which will be described in detail later in this statement, can be slotted by the second face. As illustrated in lales, the two lateral panels 15 and 16 can be parallel to each other.

[0053] As indicated at the beginning of this detailed description, the present invention relates to a fastening system for securing one or two panels by their rear faces to the first face of the rail. More particularly, the fastening system according to the present invention is configured to hold two panels resting adjacently, their rear faces resting on the first face of the rail. In this respect, the fastening system is arranged between the two panels it holds.

[0054] This is a schematic representation, and according to a perspective view, of the attachment system 100 according to the present invention.

[0055] Specifically, the fastening system 100 includes a main body 200, a retaining plate 300 and a threaded rod 400.

[0056] The main body 200, shown alone in the figure, is U-shaped. More specifically, the main body 200 comprises an upper branch 201 and a lower branch 202, and a transverse base 203 connecting the lower branch 202 and the upper branch 201.

[0057] The main body 200 also includes two lateral fins 204 and 205 which extend in two opposite directions from the upper branch 201.

[0058] The lateral fins 204 and 205 are configured in particular so that they are both supported, by one face, called contact face 204a and 205a, against, respectively, one and the other of the front faces 4 of two adjacent panels 1 and between which the main body 200 is disposed. This illustrates in this respect the attachment system 100 of the present invention disposed between two frames 2, said frames 2 resting on a rail 10. On this, each lateral fin 204 and 205 is located vertically above a front edge 3.

[0059] Advantageously, each side fin 204 and 205 includes points 206 projecting from the contact face 204a and 205a so as to be able to scratch the front face 3 when said side fin 204, 205 is in contact with said front face 3. These points, by scratching the front face 3, allow the establishment of an electrical contact and thus ensure electrical continuity between the chassis and the rail on which the panel in question rests.

[0060] Advantageously, and as illustrated in 1a and 1a, each lateral fin 204, 205 may include folded tabs 207 ending in one of the points 206. It is understood without needing to specify that each tab 207 is projecting relative to the contact face of the lateral fin on which it is formed.

[0061] According to a particular embodiment, the main body 200 can be the result of shaping a metal plate. In particular, the shaping can include punching and / or cutting and / or bending steps.

[0062] Thus, the main body 200 can comprise two lateral walls 210a and 210b essentially parallel to each other and laterally delimiting the lower branch 202, the transverse base 203 and the upper branch 201.

[0063] According to this particular embodiment, the lower branch 202 may include a bottom, called the lower bottom 202a, connecting the two lateral walls 210a and 210b.

[0064] Each side wall 210a and 210b may include a free edge 211a and 211b which extends continuously and internally delimits the lower branch 202, the transverse base 203 and the upper branch 201. More particularly, the free edges 211a and 211b may be curved, internally or externally (as illustrated in the figure), in order to reinforce the mechanical strength of the main body 200.

[0065] As illustrated in the figure, the transverse base 203 may comprise two sections, called transverse sections 204a and 204b, forming a transverse bottom 204. In particular, the two transverse sections 204a and 204b are folded towards each other, and extend from an edge of one of the lateral walls 210a and 210b opposite the free edge 211a and 211b.

[0066] Advantageously, the lower bottom 202a is extended by two folded slats 205a and 205b, each bearing against an inner face of one of the cross sections 204a and 204b ().

[0067] As illustrated in the figure, the upper branch 201 may include at its free end two sections, called end sections 201a and 201b, opposite the cross sections 204a and 204b, and folded towards each other.

[0068] This is a schematic representation of the 300 retaining plate in isolation and according to a perspective view.

[0069] In particular, the retaining plate 300 includes in particular an upper face 301 and an lower face 302, and is disposed between the upper branch 201 and the lower branch 202, the upper face 301 facing the upper branch 201 ().

[0070] As illustrated in the figure, the retaining plate is mechanically linked to the lower branch 202 by means of the threaded rod 400.

[0071] As an example, the threaded rod passes through the lower branch, and in particular the lower bottom, and is secured by a free end of its threaded rod to the retaining plate.

[0072] More specifically, the lower bottom 202a includes a threaded barrel 208 and configured to cooperate with the threaded rod 400.

[0073] In particular, the threaded rod 400 is configured to allow adjustment of the distance between the retaining plate 300 and the upper arm 201. This adjustment allows in particular a clamping of the panel 1 against the first face 11 of the rail 10, by support of the retaining plate 300 against the second face 13 of the rail, and support of a lateral fin 204, 205 against the front face 3 of said panel.

[0074] As an example, the retaining plate 300 may include a central section 303, essentially flat, and two lateral sections 304 extending on either side of the central section 303. The lateral sections 304 are in particular configured to allow spring-effect retention between two lateral faces of the rail.

[0075] The retaining plate 300 can, in particular, be secured to the threaded rod 400 by means of the central section 303. For example, and without limiting the invention to this aspect alone, the central section 303 can include a stamped area 303a configured to cooperate with the free end of the threaded rod 400. In particular, the stamped area 303a forms a recess in which the free end of the threaded rod 400 can be housed and retained by tabs 303b projecting internally into the recess. Additionally, a groove on the free end of the threaded rod, configured to cooperate with the tabs 303b, can be incorporated to provide improved mechanical fastening between the rod and the retaining plate.

[0076] More specifically, the side sections 304 can be configured to allow for embedding and spring-effect retention in the interlocking zone 17 of the rail 10. More specifically, the two side sections 304 can be configured to exert a force against the two side faces 15 and 16 and thus contribute to holding the retaining plate 300 in the interlocking zone.

[0077] As another example, each lateral section 304 has a convex shape on the upper face and is intended to be fitted together.

[0078] Advantageously, each lateral section 304 comprises, from the central section 303 to an edge, a first wall 304a perpendicular to the central section, a second wall 304b perpendicular to the first wall 304c, and a spring wall 305. Advantageously and without limitation, the spring wall 305 comprises, from the second wall 304b, a first spring section 305a and a second spring 305b, the first two spring sections 305a extending convergently in the direction from the lower branch 202 to the upper branch 201, and the second two spring sections 305b extending divergently in the same direction.

[0079] Advantageously, each lateral section 304 can be provided with claws, called lateral claws 305c, projecting laterally from the lateral section 304 in question. In particular, each lateral claw 305c can be arranged at the end of a strip bent from a lateral section. These lateral claws 305c allow for

[0080] When the retaining plate is inserted into the interlocking area, the lateral claws 305c grip the lateral faces 15 and 16 of the rail and establish electrical contact between the rail and the fastening system. This electrical contact ensures electrical continuity between the fastening system and the rail.

[0081] Thus, the fastening system according to the present invention allows the panel 1 to be held, by its rear face, on the first face of a rail. The implementation of the holding system 100 may initially involve engaging the retaining plate 300 in the interlocking zone (). Following this step, the fastening system is secured to the rail. In particular, the two spring walls 305 are each in contact with, and exert a force against, respectively, one and the other of the two lateral faces 15 and 16, thereby holding the fastening system to the rail.

[0082] It is then possible to engage the panel (a section of its frame) between the first face of the rail and the upper arm of said fastening system without having to hold or manipulate said fastening system, and proceed to tighten said panel between the first face 14 and a lateral fin 205.

[0083] This tightening process includes, in particular, the manipulation of the threaded rod (which can be a screw or a nut) in order to reduce the distance between the retaining plate and the upper arm.

[0084] The invention also relates to another embodiment, referred to as the second embodiment, of the fastening system. The fastening system according to this second embodiment, illustrated in Figure 1, essentially reproduces the technical elements of the embodiment described in relation to Figure 2.

[0085] This second embodiment differs from the embodiment described in relation to the one described in that the clamping rod is not threaded and includes circumferential ridges 401 configured to cooperate by snapping with a barrel 209 projecting relative to the lower bottom 202a.

[0086] The invention also relates to a third embodiment of the fastening system, which may essentially incorporate all or part of the features of the other two embodiments. The fastening system according to this third embodiment is illustrated in Figure 1 (this representation is limited to the main body).

[0087] According to this third embodiment, the main body 200 comprises only one lateral fin 204 and may comprise only one lateral wall (conforming to either of the two lateral walls 210a, 210B of the.

[0088] The invention also relates to a fourth embodiment of the fastening system which can essentially incorporate all, or part, of the characteristics of the other three embodiments.

[0089] According to this embodiment illustrated in 1a and 1a, the clamping rod is mounted on the lower arm and obliquely (not perpendicularly) to said lower arm. For example, the clamping rod 400 is mounted at an angle of 45° to the lower arm 202. The clamping rod 400 is mounted on a bent section 212 of the lower arm 202, the bent section 212 supporting the shaft 208.

[0090] According to this fourth embodiment, the central section 303 of the retaining plate 300 is also oriented obliquely with respect to the lower branch, and more particularly orthogonally to the clamping rod 400.

[0091] The orientation of the 400 clamping rod towards the transverse base facilitates the clamping operation when there is little space.

[0092] The invention also relates to a fifth embodiment of the fastening system which can essentially incorporate all, or part, of the characteristics of the other four embodiments.

[0093] According to this embodiment illustrated in a, a and a, the clamping rod 400 is mounted parallel to the lower arm and includes a head opening through an external face 203a of the transverse base 203, the external face 203a being opposite an internal face of said transverse base and delimiting the "U".

[0094] Similar to the fourth embodiment, the central section 303 of the retaining plate 300 is oriented obliquely with respect to the lower arm, while the lower arm also includes an oblique plane against which the central section slides during the clamping operation by the clamping rod.

[0095] The fastening system according to this fifth embodiment includes an additional plate 402 attached to one end of the clamping rod 400 and intended to bear against the central section 303 of the retaining plate 300. In other words, the clamping rod 400 passes through the central section 303 and acts only on the additional plate during the clamping operation by the clamping rod.

[0096] Consideration of the additional plate 402 helps to avoid any twisting or deformation of the fastening system and in particular of the retaining plate during the tightening operation.

[0097] The invention also relates to a sixth embodiment of the fastening system which can essentially reproduce all, or part, of the characteristics of the fifth embodiment.

[0098] In particular, in this sixth embodiment, the transverse base 203 comprises, from the lower branch 202 to the upper branch 201, a lower section 203a and an upper section 203b, the upper section forming a non-zero angle with the lower section 203a.

[0099] It is noteworthy that the fastening system described above, in addition to its simplicity of implementation, allows for the accommodation of variable panel thicknesses.

[0100] Furthermore, the implementation of the attachment system according to the present invention is not limited to the sole consideration of a rail as illustrated in the.

[0101] The invention also relates to an assembly consisting of at least one panel arranged on a rail and clamped against this rail by means of the fastening system.

[0102] Of course, the invention is not limited to the embodiments described and alternative embodiments can be made without departing from the scope of the invention as defined by the claims.

Claims

Attachment system (100) for holding a panel (1), by one of its faces called rear face, on a first face (11) of a rail (10), the attachment system (100) comprising: - a main body (200) in the shape of a U which includes an upper branch (201) and a lower branch (202), and a transverse base (203) connecting the lower branch (202) and the upper branch (201), the main body (200) also includes at least one lateral fin (204, 205) configured to be in contact, by a face called contact face (204a, 205a), against a front face, opposite to the rear face, of the panel (1);- a retaining plate (300), disposed between the upper arm (201) and the lower arm (202), and connected to the lower arm (202) by means of a clamping rod (400), the clamping rod (400) being configured to allow adjustment of the distance between the retaining plate (300) and the upper arm (201), and thus allow clamping of the panel (1) against the first face (11) of the rail (10), by bearing the retaining plate (300) against a second face of the rail (10) opposite the first face (11), and bearing a lateral fin (204, 205) against the front face of said panel (1).; Attachment system (100) according to claim 1, in which at least one side fin (204, 205) comprises two side fins extending in two opposite directions from the upper arm (201), the side fins being configured to be supported, by a face called contact face (204a, 205a), against, respectively, one and the other of front faces, opposite to the rear faces, of two adjacent panels (1)x and between which the main body (200) is disposed. Attachment system (100) according to claim 2, in which the clamping rod (400) passes through the lower arm (202), and is attached, by a free end, to the retaining plate (300). Attachment system (100) according to claim 2 or 3, wherein the main body (200) comprises two essentially parallel side walls (210a, 210b) laterally delimiting the lower arm (202), the transverse base (203) and the upper arm (201), the lower arm (202) also comprising a bottom, called lower bottom (202a) connecting the two side walls (210a, 210b), each side wall comprises a free edge (211a, 211b) which extends continuously and internally delimits the lower arm (202), the transverse base (203) and the upper arm (201). Attachment system (100) according to claim 4, wherein the transverse base (203) comprises two sections, referred to as transverse sections, forming a transverse bottom, and folded towards each other, and each transverse section extending from an edge of one of the side walls (210a, 210b) opposite the free edge (211a, 211b), and wherein the lower bottom is extended by two folded slats, each bearing against an inner face of one of the transverse sections. Attachment system (100) according to claim 5, in which the upper arm (201) comprises at its free end two sections, called end sections, opposite to the cross sections, and folded towards each other. Attachment system (100) according to any one of claims 4 to 6 in combination with claim 2, wherein the clamping rod (400) includes a thread, the lower bottom (202a) includes a barrel (208) and is configured to cooperate with the clamping rod (400). Attachment system (100) according to any one of claims 2 to 7, wherein each side fin (204, 205) comprises points projecting from the contact face (204a, 205a) so as to be able to scratch the front face when said side fin (204, 205) is in contact with said front face. Attachment system (100) according to claim 8, wherein each side fin (204, 205) comprises folded tabs (207) ending in one of the points. Attachment system (100) according to any one of claims 1 to 9, wherein the retaining plate (300) comprises a central section (303), essentially flat, and two lateral sections (304) extending on either side of the central section (303), the lateral sections (304) being configured to allow spring-effect retention between two lateral faces of the rail (10). Attachment system (100) according to claim 10, wherein the retaining plate (300) is configured to allow insertion into a rail (10) by its second face. Attachment system (100) according to claim 10 or 11, wherein each lateral section (304) has a convex shape through the face, called the nesting face, through which it is intended to be nested. Attachment system (100) according to claim 12, in which each lateral section (304) comprises, from the central section (303) to an edge, a first wall (304a) perpendicular to the central section (303), a second wall (304b) perpendicular to the first wall (304a), and a spring wall, advantageously the spring wall comprises, from the second wall (304b), a first spring section (305a) and a second spring section (305b), the first two spring sections extending convergently in the direction from the lower branch (202) to the upper branch (201), and two second spring sections extending divergently in the same direction.

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