Window shutter

Abstract

The present invention relates to a window shutter (1) and its mounting method. This shutter comprises, in particular, a frame (2) whose uprights (5) are formed of a main profile (7) and a secondary profile (8) which can be assembled or separated, the secondary profile (8) being able to be coupled with a hook slat of a group of slats of the shutter (1) and the main profile (7) being assembled with crossbars to form the frame (2). Figure for the abstract: Fig. 5.

Description

Title of the invention: Window shutter FIELD OF INVENTION

[0001] The invention lies in the field of building joinery.

[0002] The present invention relates more particularly to a window shutter, in particular a shutter whose slats are sliding and folding on each side of the window. STATE OF THE ART

[0003] Such a shutter is already known in the prior art.

[0004] This shutter comprises a frame and two packs of shutter slats, positioned to the right and left of the frame.

[0005] The frame is formed by the assembly of two vertical uprights and two horizontal crossbars, one upper and one lower respectively, each of these crossbars being provided with a longitudinal guide rail. Some of these rails have at each of their upper and lower ends at least one guide slide.

[0006] In the following description and claims, the terms "high" and "low" are to be taken into consideration with respect to the normal position of use of the shutter, which is that represented in particular in figures 1 and 2.

[0007] The louvers are assembled at the factory so that for each louver blade equipped with a slider, its upper slider is engaged in the guide rail of the upper crossbar and its lower slider in the lower crossbar of the frame.

[0008] This results in a complete "louver block" including the frame and the two packs of slats for the curtain. This block is then brought into the building and fixed in the window recess where it is to be installed. However, this poses various problems, described below, during assembly (installation) or when it is subsequently necessary to dismantle the louver block, for example for maintenance or to replace a damaged slat.

[0009] First, the uprights and crossbars are assembled together by screwing. This fastening system is semi-irreversible. Indeed, if the uprights and crossbars are disassembled and then reassembled, the countersunks or screw recesses in the locations provided for this purpose in the crossbar will be marked and potentially damaged, so that the holding of the uprights and crossbars together may be less reliable.

[0010] Furthermore, the weight and bulk of the complete shutter assembly can make it difficult to handle and install in the window frame by installers. In addition, dismantling is also more complex, which limits the possibilities for repairing the shutter. Description of the invention

[0011] One object of the invention is to provide a shutter that makes it possible to solve the aforementioned problems, in particular concerning its handling, its installation in the embrasure of a window, its dismantling and its reassembly.

[0012] To this end, the invention relates to a window shutter comprising:

[0013] - a frame configured to be fixed in the embrasure of a building,

[0014] -a first group of louver blades comprising a hook blade or a plurality of blades including a hook blade,

[0015] -and a second group of louver blades comprising a plurality of blades including a hook blade,

[0016] said frame comprising two uprights and two crossbars, each crossbar being provided with a longitudinal guide rail, the slats of the plurality of slats being assembled together so as to be accordion-foldable and at least some of the slats of the plurality of slats with the exception of the hook slats, preferably all the slats of the plurality of slats with the exception of the hook slats having at each of their two ends at least one guide slide received in one of the guide rails.

[0017] According to the invention, each upright comprises a main profile and a secondary profile, configured to be able to be assembled in a so-called "assembly" position and to be able to be separated; each secondary profile comprises a longitudinal hook, with a spiral cross-section, from which extend, respectively, a longitudinal tab called the "interlocking tab" and a flat longitudinal tab called the "support tab"; the longitudinal hook of the secondary profile is configured to be coupled with a complementary longitudinal hook with a spiral cross-section, fixed or formed along said hook blade in order to allow the coupling of this hook blade with said secondary profile; each main profile is fixed to the two cross members so as to form the frame; each main profile comprises an opposing inner wall and outer wall, joined by two opposing side walls.- the outer wall of the main profile comprises, along one of its two longitudinal sides, a longitudinal flange with an L-shaped cross-section which, together with the outer face of this outer wall, defines a longitudinal groove, and in that the outer face of this outer wall forms, along the other of the two longitudinal sides, a flat longitudinal bearing face, - the main profile and the secondary profile are configured so that the interlocking tab of the secondary profile is housed in said longitudinal groove, of the main profile and that the support tab of the secondary profile rests against the support face of the main profile, when both profiles are in the assembly position, - and each cross member includes at least one lateral opening leading into its guide rail, this lateral opening being configured to allow the insertion and extraction of the blade guide slides, in and out of this guide rail.

[0018] Thanks to these features of the invention, the frame is composed of the two crossbars assembled to the two main profiles and this frame can be handled by the installers independently of the blade groups.

[0019] This frame is easier to move, to position in the building's opening for fixing, or conversely, to remove. Access to drilling and screwing tools is also facilitated. Furthermore, this frame can also remain in place in the building's opening when at least one of the two slat groups needs to be removed for maintenance or repair.

[0020] The assembly, consisting solely of a group of blades and a secondary profile, is much lighter and less cumbersome for installers to handle. It is therefore possible to disassemble and handle the first group of blades and its associated secondary profile separately from the second group of blades and its associated secondary profile. Each group of blades can even be easily separated from its secondary profile as soon as it is removed from the frame, further reducing the load to be handled by installers.

[0021] The louver according to the invention makes it possible to obtain a significant gain in terms of installation time, which makes it possible to reduce delays on construction sites and to optimize the overall efficiency of the work.

[0022] Finally, the ergonomics of the shutter installation process are greatly improved, particularly with regard to the reduction of loads to be carried (no need for lifting tools) and the safety of installers since the risks of injury or musculoskeletal disorders are reduced.

[0023] According to other advantageous and non-limiting features of the invention, taken alone or in combination:

[0024] - the outer wall of the main profile comprises, between its bearing face and the groove, a longitudinal groove, configured to receive the head of at least one fixing screw of the main profile in the building opening;

[0025] - the longitudinal hook with a spiral cross-section of each secondary profile comprises a free end positioned inside the spiral and an opposite end called the "hook base", this base extends in a longitudinal plane, parallel or substantially parallel to the plane in which the support leg extends, and this base has an inner face oriented opposite the outer face of the outer wall of the main profile when both profiles are in the assembly position, the secondary profile also includes a longitudinal connecting portion, which extends perpendicularly or substantially perpendicularly from the inner face of said base and which continues through said support lug;

[0026] - the secondary profile includes a stiffening rib that extends in projection from the inner face of the base of the longitudinal hook, this stiffening rib delimits, with the base and the connecting portion, a longitudinal cavity with a C-shaped cross-section for receiving a screw shank;

[0027] - the interlocking tab extends in a plane that is parallel or substantially parallel to the plane of the support leg.

[0028] - the longitudinal groove of the outer wall of the main profile has a U-section with one of its side walls perpendicular to the bearing face of the main profile and the secondary profile includes a longitudinal transverse bracing rib, which extends projecting from the inner face of the support lug, perpendicular to it, so that when the two profiles are in the assembly position, the transverse bracing rib is in contact with the side wall of the U-section.

[0029] The invention also relates to a method of mounting a window shutter as mentioned above, in the embrasure of a building.

[0030] According to the invention, this method comprises the following steps:

[0031] - for fixing the two crossbars to the two main profiles to form the frame,

[0032] - for fixing the frame thus formed in the opening of the building,

[0033] - coupling of the hook of one of the two secondary profiles with the hook complementary to the hook of the first group of blades and coupling of the hook of the other of the two secondary profiles with the complementary hook of the hook of the second group of blades,

[0034] - introduction of the guide slides for the louver blades into the respective guide rails of the two cross members of said frame,

[0035] then the successive steps:

[0036] - of introducing the interlocking tab of each secondary profile into the groove longitudinal of one of the two main profiles,

[0037] - application of the support tab of the secondary profile against the support face of the main profile with which it cooperates,

[0038] - assembly of each secondary profile and the corresponding main profile, by screwing at least one assembly screw through the support tab of the secondary profile and the internal wall of the main profile. DESCRIPTION OF THE FIGURES

[0039] Other features, purposes and advantages of the invention will become apparent from the following description, which is purely illustrative and not limiting, and which should be read in conjunction with the accompanying drawings, on which:

[0040] Fig. 1 represents a shutter according to the invention, in which the slats of the shutter are in a so-called "closed apron" position.

[0041] Figure 2 represents a first embodiment of a louver conforming to the invention, in which the slats of the shutter are in a so-called "open apron" position and are folded back on each side of the window.

[0042] Figure 3 is a cross-section of the secondary profile of one of the uprights forming the frame of the shutter according to the invention and part of a hook blade.

[0043] Figure 4 is a cross-section of the main profile of one of the uprights forming the frame of the shutter according to the invention.

[0044] Figure 5 is a schematic cross-sectional view of an upright according to the invention, fixed in the embrasure of a window using a method of installation known as "revealing installation".

[0045] Figure 6 is a perspective view of a main profile and a secondary profile. in assembly position.

[0046] Figure 7 is a perspective view of part of a crossbar of the louver in accordance with the invention.

[0047] Fig. 8 is a perspective view of a portion of the shutter according to the invention, according to a second embodiment.

[0048] Figure 9 is a schematic view representing the secondary profile, a part of a hook blade and a retaining plate. DETAILED DESCRIPTION OF THE INVENTION

[0049] By referring to figures 1 and 2, it can be seen that the shutter 1, according to the invention, comprises a frame 2, a first group of shutter blades 3 and a second group of shutter blades 4.

[0050] The first group 3 of blades comprises either a plurality of blades 30, 31 of which a first blade, called "gripping blade" 30 (as shown in [Fig.8]), or a single gripping blade 30 (as shown in [Fig.2]).

[0051] The second group 4 of louver blades comprises a plurality of blades 40, 41, including a first blade called a "hook blade" 40.

[0052] In each plurality of blades 30, 31 and 40, 41, the blades are assembled together, for example by means of hinges, so as to be able to fold like an accordion, (see position illustrated on [Fig.2]), the hook blade (also known as the "edge blade") constituting the first blade of the accordion.

[0053] In addition, at least some of the blades 31, 41, with the exception of the hook blades 30, 40, (preferably all the blades 31, 41, with the exception of the hook blades 30, 40) have at each of their two ends (respectively upper and lower) at least one guide slide. These guide slides are referenced 300 for the blades of the first group 3 and 400 for the blades of the second group 4, (see Figures 8 and 2).

[0054] As can be seen in [Fig.5], the shutter is configured to be fixed in the embrasure E of a building B, for example in front of a window V.

[0055] The frame 2 comprises two uprights 5 which extend vertically, and two crossbars 6, which extend horizontally, namely an upper crossbar 61 and a lower crossbar 62 (see figures 1 and 2).

[0056] Each upper cross member 61 and lower cross member 62 is elongated and has a longitudinal guide rail, these rails being referenced respectively as 610 and 620. The cross members 61 and 62 are assembled so that their respective guide rails 610 and 620 open opposite each other.

[0057] The guide slides of the upper ends of the blades are received in the guide rail 610 of the upper cross member 61 and the guide slides of the lower ends of the blades in the guide rail 620 of the lower cross member 62.

[0058] As shown in [Fig.7], each cross member 61, 62 includes at least one lateral opening 611, respectively 621, which opens into its guide rail 610, respectively 620. This lateral opening 611, 621 is configured (dimensioned) to allow the insertion and extraction of the guide slides 300, 400 of the blades of the first and second group of blades, into and out of this guide rail 610, 620.

[0059] Preferably, each lateral opening 611, 621 is closed by a blade guide 9 (see [Fig.8]) for aesthetic reasons, to prevent the slides from coming out of the guide rail unintentionally, and to guide the blades 31, 4L

[0060] Each of the two uprights 5 comprises a main profile 7 and a secondary profile 8, visible in figures 3 to 6.

[0061] These profiles 7 and 8 are configured so that they can be assembled in a so-called "assembly" position, shown in [Fig.6] and so that they can be separated from each other.

[0062] The main profile 7 has a generally elongated shape and a central longitudinal axis Y-Y'.

[0063] The main profile 7 has a closed cross-section. Preferably, this section is generally square or rectangular in shape. The profile 7 comprises a wall internal 71 and an external wall 72 opposite, joined by two lateral walls 73, 74 opposite.

[0064] In the following description and claims, by convention, the term "internal" refers to a surface or element intended to be positioned or oriented towards the walls of the embrasure E (bottom of [Fig.4]) and the term "external" refers to a surface or element intended to be positioned or oriented towards the center of the embrasure, when the shutter is in place therein, (top of [Fig.4]).

[0065] The external wall 72 has two longitudinal sides 721 and 722, located on either side of its central zone 723.

[0066] The outer wall 72 comprises, along its longitudinal side 722, a longitudinal wing 724 with an L-shaped cross-section which, together with the outer face 725 of this outer wall 72, defines a longitudinal groove 726. This groove 726 extends along an axis parallel to the Y-Y' axis. It opens towards the central zone 723.

[0067] Furthermore, the external face 725 of the external wall 72 has, along the longitudinal side 721 of the external wall 72, a flat longitudinal bearing face 727. This bearing face 727 thus extends over a part of the width of the external wall 72.

[0068] Preferably, the outer wall 72 of the main profile 7 includes, in its central area 723, i.e., between the bearing face 727 and the groove 726, a longitudinal groove 728. This groove extends parallel to the axis Y-Y'. It is configured to receive the head of at least one fixing screw VA of the main profile 7 in the opening E of the building B (see [Fig. 5]). Preferably, this main profile 7 is fixed using several screws VA distributed along the height of the window. This type of installation is called "reveal installation" and will be described in detail later.

[0069] Preferably, the groove 728 has a U-shaped section with a bottom 7280 and two side walls 7281 and 7282. Also preferably, the side wall 7281 forms a right angle with the bearing face 727.

[0070] The secondary profile 8 will now be described in more detail in connection with figures 3 and 6.

[0071] The secondary profile 8 has a general elongated shape and a central longitudinal axis Yl-Y'l.

[0072] In general, the secondary profile 8 comprises a longitudinal hook 80, with a spiral cross-section, from which extend on either side respectively, a longitudinal interlocking tab 81 and a flat longitudinal support tab 82.

[0073] The hook 80 is said to be longitudinal in the sense that it extends along the profile 8, along the axis Y1-Y' 1, as is more clearly shown in [Fig.6].

[0074] The hook 80 includes a free end 801 which is positioned inside the spiral and an opposite end 802, called the "hook base".

[0075] Preferably, this base 802 extends in a longitudinal plane P that is parallel or substantially parallel to the plane PI in which the support lug 82 extends (see [Fig. 3]). Furthermore, this base 802 has an internal face 803. When the two profiles 7 and 8 are in the assembly position, this internal face 803 is located opposite the external face 725 of the external wall 72 of the main profile 7.

[0076] Preferably also, the secondary profile 8 comprises a longitudinal connecting portion 83, which is preferably flat and straight and which extends perpendicularly or substantially perpendicularly from the inner face 803 of said base 802 and which continues as the support lug 82. The support lug 82 is preferably perpendicular or substantially perpendicular to this portion 83

[0077] In addition, preferably, the secondary profile 8 includes a longitudinal rib 84, referred to as a "transverse shim rib," which projects outward from the inner face 820 of the support lug 82, perpendicular to it. Thus, when the two profiles 7 and 8 are in the assembly position (see [Fig. 6]), in which the support lug 82 rests against the bearing face 727, the shim rib 84 comes into contact with the lateral wall 7281 of the groove 728. As can be seen in [Fig. 6], this prevents the secondary profile 8 from moving to the left relative to the main profile 7.

[0078] The longitudinal interlocking leg 81 extends in a direction parallel to the Yl-Y'l axis.

[0079] In addition, the interlocking lug 81 and the base 802 of the hook are joined by a longitudinal connecting part 85. Preferably, and as is more clearly shown in [Fig.3], this connecting part 85 is inclined from the base 802 to the interlocking lug 81.

[0080] Preferably, the lug 81 extends in a longitudinal plane P2 which is parallel or substantially parallel to the plane PI in which the support lug 82 extends. Thus, in the assembly position of the profiles, the lugs 81 and 82 rest respectively against the external face 725 and against the support face 727 of the external wall 72.

[0081] Preferably also, the leg 81 extends in a longitudinal plane P2 which is parallel or substantially parallel to the plane P of the base 802.

[0082] Finally, advantageously and as is more clearly shown in [Fig.3], the secondary profile 8 includes a stiffening rib 86 which extends projecting from the inner face 803 of the base 802 of the longitudinal hook 80. Preferably, this stiffening rib 86 has a curved shape whose concavity is turned towards the connecting portion 83.

[0083] The stiffening rib 86, the base 802 and the connecting portion 83 together define a longitudinal cavity 87, with a cross-section in C, which allows the reception of a screw shank, as will be explained later.

[0084] Furthermore, each hook 30 or 40 of the two groups 3, 4 of hooks includes, along one of its longitudinal sides, a longitudinal hook with a spiral cross-section. This hook is called "complementary" because it is designed to cooperate with the hook 80 of the secondary profile 8. In [Fig. 3], which represents the hook 30 or 40, this complementary hook, referenced 301, 401, can be seen. This complementary hook 301, 401 is fixed or formed along the hook.

[0085] The hook 80 is configured so that it can be coupled with one of the complementary hooks 301, 401, by complementary shape, as can be seen in [Fig. 3]. In other words, when the two hooks are assembled, the free end 801 of the hook 80 is located inside the spiral of the hook 301 or 401.

[0086] This assembly ensures that the hook blade is securely held on the secondary profile, which is important for withstanding user handling of the louver and exposure to the elements, particularly strong winds. Furthermore, this assembly allows the hook blade to pivot relative to the secondary profile 8 in both directions (see arrows i and ii), a feature used when folding the louver like an accordion and during assembly.

[0087] Finally, it should be noted that the secondary profile 8 is monobloc. Louver assembly method.

[0088] Unlike the louver known from the prior art, only the two main profiles 7 are assembled to the upper crossbars 61 and lower crossbars 62 to form the frame 2, thus lightening the frame. This assembly is preferably carried out using screws.

[0089] The frame 2 thus formed is fixed in the embrasure E of the building B, preferably using fixing screws VA.

[0090] When the frame 2 is fixed in "tabletop installation", as shown in [Fig.5], each screw VA is arranged so as to pass through the outer wall 72 and the inner wall 71 of the profile 7, so that its head is received in the groove 728 and so that its end penetrates the table TA of the embrasure E (i.e. one of the two vertical sides of the embrasure E).

[0091] It is also possible to install the frame 2 in a so-called "surface-mounted" manner (not shown in the figures). In this case, the main profile 7 is fixed to the part of the building B located near the window V, and so that the fixing screws VA pass through the side walls 73, 74.

[0092] Furthermore, the hook 80 of one of the two secondary profiles 8 is coupled with the complementary hook 301 of the gripping blade 30 of the first group of blades 3 and the same applies to the hook 80 of the other of the two secondary profiles 8 with the complementary hook 401 of the hook blade 40 of the second group of blades 4.

[0093] This coupling is achieved by axially inserting the hook 301 or 401 into the hook 80 (that is to say in a direction parallel to the axis Y1-Y' 1).

[0094] Advantageously, and to prevent the secondary profile 8 from sliding unintentionally relative to the gripping blade 30 or 40 during handling of the assembly, a retaining plate 91 with an opening 910 (shown in dashed lines in [Fig. 9]) can be positioned at at least one, or even both, ends of the secondary profile 8. This retaining plate 91 is held in place by a screw whose shank is inserted into the opening 910 and into the longitudinal cavity 87.

[0095] For this purpose, it will be noted that advantageously, the connecting portion 83, the base 802 and the stiffening rib 86 can be provided with longitudinal lugs, respectively 830, 8020 and 860 which protrude into the longitudinal cavity 87 and which contribute to the retention of the screw.

[0096] The different louver blades of the two groups of blades 3, 4 are then positioned in the frame 2, so as to introduce the guide slides 300, 400 respectively into the guide rails 610, 620, through the lateral openings 611, 621.

[0097] Next, on each side of the window, each interlocking tab 81 of a secondary profile 8 is inserted into the longitudinal groove 726 of a primary profile 7, and then this secondary profile 8 is rotated to apply its bearing tab 82 against the bearing face 727 of the primary profile 7 with which it cooperates. The assembly is therefore extremely simple. The groove 726 also allows for lateral positioning of the profile 8.

[0098] Finally, the secondary profile 8 and the corresponding main profile 7 are assembled by screwing at least one assembly screw VB (see [Fig.5]) through the support lug 82 and the external wall 72, at the level of the support face 727.

[0099] The two profiles are then in the so-called "assembly" position, shown in figures 5 and 6.

[0100] In this assembly position, it should be noted that the fixing screw VA is no longer accessible, as it is hidden by the secondary profile 8, and that when the louver is in the closed position shown in [Fig. 1], the assembly screw VB is also no longer accessible. This louver is therefore tamper-proof.

[0101] The blade guides 9 are then preferably positioned and fixed in front of said openings 611, 621. Procedure for dismantling the shutter.

[0102] For disassembly, the assembly screw(s) VB are unscrewed and the lug 81 is removed from the longitudinal groove 726. The blade guides 9 are removed. if they are present. Then, the 300, 400 slides are extracted from the guide rails and the installer can handle the entire blade group / secondary profile alone, the frame 2 being able to remain in place in the E recess.

Claims

1. Demands Louver (1) for window comprising: -a frame (2) configured to be fixed in the embrasure (E) of a building (B), -a first group (3) of louver blades comprising a hook blade (30) or a plurality of blades (30, 31) including a hook blade (30), -and a second group (4) of louver blades comprising a plurality of blades (40, 41) including a hook blade (40), said frame (2) comprising two uprights (5) and two crossbars (61, 62), each crossbar (61, 62) being provided with a longitudinal guide rail (610, 620), the blades (30, 31, 40, 41) of the plurality of blades being assembled together so as to be accordion-foldable and at least some of the blades (31, 41) of the plurality of blades with the exception of the hook blades (30, 40), preferably all the blades (31, 41) of the plurality of blades with the exception of the hook blades (30, 40) having at each of their two ends at least one guide slide (300, 400) received in one of the guide rails (610, 620), characterized in that each upright (5) comprises a main profile (7) and a secondary profile (8), configured to be able to be assembled in a so-called "assembly" position and to be able to be separated, -in that each secondary profile (8) comprises a longitudinal hook (80), with a spiral cross-section, from which extend on either side respectively, a longitudinal tab called "interlocking tab" (81) and a flat longitudinal tab called "support tab" (82), -in that the longitudinal hook (80) of the secondary profile (8) is configured to be coupled with a complementary longitudinal hook (301, 401) with a spiral cross-section, fixed or formed along said hooking blade (30, 40) in order to allow the coupling of this hooking blade (30, 40) with said secondary profile (8), -in that each main profile (7) is fixed to the two cross members (61, 62) so as to form the frame (2),

2.

3. -in that each main profile (7) comprises an opposing internal wall (71) and external wall (72), joined by two opposing lateral walls (73, 74), -in that the outer wall (72) of the main profile (7) comprises, along one (722) of its two longitudinal sides, a longitudinal flange with an L-shaped cross-section (724) which, together with the outer face (725) of this outer wall (72), forms a longitudinal groove (726), and in that the outer face (725) of this outer wall (72) forms, along the other (721) of the two longitudinal sides, a flat longitudinal bearing face (727), -in that the main profile (7) and the secondary profile (8) are configured such that the interlocking tab (81) of the secondary profile (8) is housed in said longitudinal groove (726) of the main profile (7) and that the bearing tab (82) of the secondary profile (8) rests against the bearing face (727) of the main profile (7), when the two profiles (7, 8) are in the assembly position, - and in that each cross member (61, 62) includes at least one lateral opening (611, 621) leading into its guide rail (610, 620),This lateral opening (611, 621) is configured to allow the insertion and extraction of the guide slides (300, 400) of the blades, into and out of this guide rail (610, 620). A louver (1) according to claim 1, characterized in that the outer wall (72) of the main profile (7) comprises, between its bearing face (727) and the groove (726), a longitudinal groove (728), configured to receive the head of at least one screw for fixing the main profile (7) in the opening (E) of the building (B). Louver (1) according to claim 1 or 2, characterized in that the longitudinal hook (80) with a spiral cross-section of each secondary profile (8) comprises a free end (801) positioned inside the spiral and an opposite end called the "hook base" (802), in that this base (802) extends in a longitudinal plane (P), parallel or substantially parallel to the plane (PI) in which the support bracket (82) extends, and in that this base (802) has an internal face (803) oriented opposite the external face (725) of the external wall (72) of the main profile (7) when the two profiles (7, 8) are in the assembly position, in that the secondary profile (8) also includes a longitudinal connecting portion (83), which extends perpendicularly or substantially perpendicularly from the inner face (803) of said base (802) and which continues through said support leg (82).

4. Louver (1) according to claim 3, characterized in that the secondary profile (8) comprises a stiffening rib (86) which extends projecting from the inner face (803) of the base (802) of the longitudinal hook (80), this stiffening rib (86) delimiting with the base (802) and the connecting portion (83), a longitudinal cavity with a cross-section in C (87) for receiving a screw shank.

5. Louver (1) according to any one of the preceding claims, characterized in that the interlocking tab (81) extends in a plane (P2) which is parallel or substantially parallel to the plane (PI) of the support tab (82).

6. Louver (1) according to claims 2 and 3, characterized in that the longitudinal groove (728) of the outer wall (72) of the main profile (7) has a U-shaped section with one of its lateral walls (7281) perpendicular to the bearing face (727) of the main profile (7) and in that the secondary profile (8) includes a longitudinal transverse shim rib (84), which projects outward from the inner face (820) of the support lug (82), perpendicular to it, so that when the two profiles (7, 8) are in the assembly position, the transverse shim rib (84) is in contact with the lateral wall (7281) of the U-shaped section.

7. A method for mounting a window shutter (1) according to any one of the preceding claims, in the opening (E) of a building (B), characterized in that it comprises the steps: - fixing the two crossbars (61, 62) with the two main profiles (7) to form the frame (2), - fixing the frame (2) thus formed in the opening (E) of the building, - coupling the hook (80) of one of the two secondary profiles (8) with the complementary hook (301) of the hook slat (30) of the first group of slats (3) and coupling the hook (80) of the other of the two secondary profiles (8) with the additional hook (401) of the hook blade (40) of the second group of blades (4), -introduction of the guide slides (300, 400) of the louver blades into the respective guide rails (610, 620) of the two crossbars (61, 62) of said frame (2), then the successive steps: - the insertion of the interlocking tab (81) of each secondary profile (8) into the longitudinal groove (726) of one of the two main profiles (7), - application of the support lug (82) of the secondary profile (8) against the support face (727) of the main profile (7) with which it cooperates, - assembly of each secondary profile (8) and the corresponding main profile (7), by screwing at least one assembly screw (VB) through the support tab (82) of the secondary profile (8) and the internal wall (72) of the main profile (7).