FR3051506A1 - ROLLING SHUTTER INSTALLATION INCLUDING A DEVICE FOR LOCKING THE APRON - Google Patents

Abstract

The invention relates in particular to a rolling shutter installation comprising an apron (1) formed of blades (2, 2a) hinged together and guided on each longitudinal side by a slide (5a, 5b), the apron being able to wind and to run from or respectively to the lower edge (51) of a window or door in the closed position. The roller shutter installation comprises a blocking device (B) of the apron in a locked and partially open position for which the lower blade (2a) of the deck is at a reduced distance (E) from the lower edge of a window or a door to prevent the passage of a person between the apron and said lower edge. The locking device (B) comprises a slider (14) mounted in translation in one of the apron blades, said slider being provided to traverse the face of the locking device opposite the apron, said face comprising at least three guide portions of the slider so as to guide the deck between different positions, including a gap position of the deck.

Description

ROLLING SHUTTER INSTALLATION COMPRISING A DEVICE FOR

BLOCKING THE APRON

The present invention relates to a shutter installation provided for fitting a window or a door. The invention particularly relates to a rolling shutter installation comprising an apron formed of blades hinged together and guided on each longitudinal side by a slide, the apron being able to wind and unwind from or respectively to the lower edge of a window or door in the closed position. The roller shutter installation includes an apron locking device in a locked and partially open position for which the lower blade of the apron is at a reduced distance from the lower edge of a window or door to prevent the passage of a person between the apron and the said lower edge. The locking device comprises a slider mounted in translation in one of the apron blades, said slider being provided to traverse the face of the locking device opposite the apron, said face comprising at least three guide portions of the slider so as to guide the apron between different positions, including a gap position of the apron.

State of the art

The same applicant is known from the document FR 3 009 577 which discloses a rolling shutter installation, comprising an apron formed of blades articulated between them and guided on each longitudinal side by a slide, the apron being able to be unrolled up to the lower part of the shutter. a window or door in the closed position. The installation comprises a cam, extending longitudinally, adapted to cooperate with a finger mounted in translation in a deck blade. The cam has a rectilinear intermediate portion, and a bent upward portion forming a stop for the finger. The cam also has at each end, upper and lower, a ramp to guide the movement of the finger. When the user controls the descent of the apron, the finger meets the upper ramp, which causes the movement of the finger in the blade, then the blade meets the intermediate portion. When raising the apron, the finger meets the lower ramp which pushes the finger to the left, before following another rectilinear part.

However, the cam is not suitable for all types of slides. The invention aims to adapt to all types of traditional scenes and renovations, without creating specific scenes. It also aims to facilitate the installation of the installation, that is to say, to facilitate the adjustment of the positioning of the locking device relative to both the slide and the slider because of the elastic tongues.

Statement of the invention

At least one of the objectives is achieved with a rolling shutter installation comprising an apron formed of blades articulated between them, the winding or unfolding around a shaft is provided by a drive means, the apron blades being guided on each side by a slide; the apron can be unrolled to the bottom of a window or door in the closed position. The installation comprises an apron locking device in a partially open position for which the lower blade of the deck is at a reduced distance from the lower edge of the window or door, in particular insufficient to allow the passage of a person .

According to the invention, the locking device comprises: a frame extending in a direction substantially parallel to the axis of the slide and, a slider extending along an axis substantially orthogonal to the plane of the deck, said slider being mounted in translation along an axis substantially perpendicular to the axis of the slide, in one of the blades, and connected to said blade with an elastic return device.

The frame extends longitudinally along the axis of the slide and has a face facing the deck blades. The face opposite the apron has three portions traveled by said cursor. The slider guides the apron with respect to the locking device during winding or unwinding.

According to the invention, the opposite face of the apron comprises: an elastically deformable upper portion and adapted to compress the elastic return device downhill, an elastically deformable intermediate portion provided with at least one recess releasing the compression of the elastic return device and preventing the raising of the slider, a lower elastically deformable portion guiding to a rear path of the locking device to allow the raising of the cursor.

According to the invention, each elastically deformable portion has an outer face facing the deck, said front face, and an inner face opposite to the outer face, said rear face.

The term elastically deformable portion of the face of the frame, a movable portion between a rest position and a cursor passage position, said mobility being expressed mainly in the plane of the deck. When applying an element such as the slider on one of the outer or inner faces of the portion considered, the portion varies the position of said portion. When the application ceases, the elastic portion returns to its initial rest position. The skilled person will design the elastically deformable portions of the face of the frame and the elastic return device of the slider, so that during the passage of the cursor, the portion is deformed elastically while the cursor, in support against said portion translates in a plane of the apron and along an axis substantially perpendicular to the axis of the slide.

He will know in particular that the stiffness of the elastically deformable portions and the stiffness of the elastic return device are not too high to allow the elastic deformation of the portion and the elastic return device.

He will also ensure that the stiffness of the elastically deformable portions is not too far from the stiffness of the elastic return device, and to allow the elastic deformation of the two parts in contact (portion and return device).

Each portion preferably comprises at least one elastically deformable tongue. Each elastically deformable tongue is connected to a first end with the face of the frame opposite the apron. Each tongue, near the first end, can articulate or deform elastically between the rest position and the passage position of the slider setting in motion said tongue. The movement of each tab near a second distal end, opposite the first end, has a substantially circular arc trajectory. The installation according to the invention makes it possible to improve the guidance of the cursor downhill as well as upwards thanks to the elastically deformable portions which force the cursor to come and position itself under the stop. The guiding of the final blade end of the deck is thus improved.

Each elastic tongue extending towards the apron may, because of its elasticity, protrude and extend more towards the deck than the abutment or the lower ramp of the prior art. The tongue protrudes towards the apron so that the spacing between the distal end of the tongues and the recess is 10 to 20 mm. This characteristic makes it possible to offer a mounting tolerance of the locking device with respect to both the slide and the slider. If the locking device is placed in a manner that would be considered too far away for the abutment of the cam of the prior art, the length of the elastic tongue makes it possible to compensate for any positioning offset and makes it possible to make the tab extending to the apron with the cursor. This facilitates the mounting of the locking device. The locking device according to the invention makes it possible to adapt to any type of slide.

In a preferred embodiment, the slider is mounted in the lower blade near one end thereof. This arrangement makes it possible to block in translation all the blades of the deck and to ensure that the reduced distance, that is to say the space left between the lower deck and the edge of the window, will remain fixed, preventing the passage of a person and avoiding the raising of the shutter from the outside.

According to the invention, the intermediate portion comprises at least one recess forming a fixed stop for stopping the slider when raising the apron. This embodiment makes it possible to carry out a translation stop in a simple manner.

Preferably, the elastically deformable intermediate portion comprises at least one elastic locking tab projecting towards the apron and having a front face and a rear face. The resilient locking tongue at a first end is connected integrally to the frame of the locking device. It is designed to deform elastically at the passage of the cursor on the front face of said tongue. The resilient locking tongue extends downwards in a substantially inclined direction: during the descent of the apron, along the front face of the resilient locking tab towards the recess; the elastic return force of the tongue acting against the restoring force of the cursor restoring device, and during the ascent of the apron, along or near the rear face of the resilient locking tab towards the recess forming the abutment; the restoring force of the elastic return device of the slider acting on the slider to direct it towards the outside of the blade, and to press it against the recess.

During the descent of the apron, the elastic locking tab allows the passage of the cursor through the elastic deformation thereof, the cursor running through the front face of the elastic locking tongue. Once the cursor has passed the distal end of the locking elastic tongue, the latter returns to its initial position, substantially inclined. The elastic locking tab blocks, by the rear face, said cursor if it ever ascended immediately or if the restoring force of the elastic return device was not sufficient.

Preferably, the recess, at least a portion of which has a surface substantially parallel to the axis of the slide, is extended upwards by the stop. When raising the apron, the slider, which has crossed the elastic locking tongue and which bears against the surface of the recess, can be guided without resistance to the fixed stop which stops the translation upwards. The surface of the stop has substantially the shape of a cylindrical half-tube. The abutment surface is oriented downwards and extends towards the opposite side to that of the recess surface by the rear face of the resilient locking tongue. The fixed stop has the advantage of blocking the winding of the apron in a partially open position, so that the lower blade is at a reduced distance from the threshold of a window or a door. In the case where the cursor is not resting against the recess surface, the cursor is stopped in translation by the rear face of the resilient locking tongue which is substantially inclined.

Optionally, the intermediate portion comprises a plurality of recesses and several elastic locking tabs distributed vertically along the intermediate portion. It is possible to choose different locking heights according to the wishes of the user.

According to the invention, the lower portion comprises a lower elastic tongue, located near the lower part of a window or a door in the closed position, projecting towards the deck, having a front face and a rear face. The lower elastic tongue, at a first end, is integrally connected to the frame of the locking device. The lower elastic tongue is provided to deform elastically as the cursor passes over the front face of said tongue. The lower elastic tongue extends downward in a substantially inclined direction. Said lower tongue is arranged to guide the movement of the cursor: during the descent of the apron, on the front face of the tongue towards a lower end of the locking device; the elastic return force of the lower elastic tongue acting against the restoring force of the elastic return device of the slider, and during the raising of the apron, on or near the rear face of the tongue towards the path back to allow the winding of the apron.

The lower tab is used to direct the cursor out of the face next to the apron. Once the cursor has passed the distal end of the lower elastic tongue, it returns to its initial position, substantially inclined so as to block the rise of the cursor to the intermediate portion by the rear face of the lower tongue. The rear path allows to slide the slider longitudinally during the winding of the deck.

According to a preferred embodiment, each elastic locking tongue and the lower elastic tongue extend downwards, and: in a direction forming a first non-zero angle with respect to a vertical plane when the cursor is not in position. contact with said tongue, and in a direction substantially parallel to the vertical plane or forming a second non-zero angle less than the first angle, when the cursor is in contact with said tongue, the latter bending by the action of the cursor connected to the device with elastic return.

The resilient locking tab and the lower elastic tab project toward the apron so that the distance between the distal end of the tabs and the recess is 10 to 20 mm. Even if the frame is attached to a slide so that it is offset from a reference position, the cursor can cooperate with the back side of the tabs. This facilitates the mounting of the locking device. The locking device according to the invention makes it possible to adapt to any type of slide.

According to another embodiment, the elastically deformable portions are made by spring devices, for example leaf spring.

Preferably, the rear path comprises a groove in the frame. The groove guides the cursor along the rear path of the frame.

According to the invention, the upper portion of the frame comprises an upper elastic tongue, placed at the upper end of the frame, projecting towards the slide, and having a front face and a rear face. The upper elastic tongue, at a first end, is integrally connected to the frame of the locking device. The upper resilient tongue is provided to deform elastically at the passage of the cursor on the rear face of said tongue when the cursor, from the rear path of the slide, goes up to allow the winding of the deck. The upper elastic tongue extends upwardly in a substantially inclined direction. Said upper tongue is arranged to guide the movement of the slider, during the descent of the apron, along the front face of the tongue, towards the at least one elastic locking tongue, sliding the slider mounted in translation in the blade . Preferably, the upper elastic tongue is, at rest, in contact with a face of the slide facing the frame of the locking device. The upper elastic tongue makes it possible to constrain the cursor to follow the face of the frame opposite the apron, and prevents the cursor from descending through the rear path. The reliability of the apron guidance is improved.

Preferably, each tongue has a substantially curvilinear profile and extends in a width of between 5 and 15 mm.

Preferably, the cursor is a finger mounted on a plate in a tip engaged in the lower blade of the deck. The plate can slide in a direction parallel to the length of the blade, and is biased resiliently in a rest position. The elastic return device tends to push the finger towards the outside of the blade. The finger is arranged at right angles to the plate, orthogonal to the plane of the unrolled deck.

Advantageously, the installation comprises a second locking device similar to the first device, the second device comprising a frame extending in a direction substantially parallel and close to the axis of the other slide, and a cursor mounted in translation. along an axis substantially perpendicular to the axis of the slide, in the blade, in which is mounted the first slider, the two locking devices contributing to recentering said blade relative to the slides.

According to various embodiments the frame is housed partially or totally in the slide. The frame can be housed completely in the slide so that the frame is fully included in the volume of space of the slide. Preferably, the frame of the locking device is fixed inside a groove of the slide so that the frame is not visible from the outside when the apron is in the closed position. In the case where the frame is housed partially in the slide, it exceeds the volume of space of the slide and is visible from the outside.

Preferably, the frame is a thermoplastic of the polyamide type loaded with glass fibers.

Preferably, the locking device is fixed to the slide by screwing. For example, the locking device comprises an intermediate plate extending parallel to the axis of the slide. The intermediate plate is connected in one piece with the locking device. The locking device bears against the slide and is fixed to the slide through the plate.

More preferably, the locking device has a transverse retaining element, on which the slide is supported so as to block the translation of the locking device relative to the slide.

For example, the transverse retaining element is a support from which extends, vertically and parallel to the distance of the frame, a holding element of the locking device. Said support bears against the lower edge of the window or the door and said holding element is inserted into a cavity of the slide so that a wall, of non-zero thickness, of said slide is located between the element of maintenance and the frame and rests on the support of the frame.

This feature has the advantage of blocking the translation of the locking device in a simple and inexpensive way.

DESCRIPTION OF THE FIGURES AND EMBODIMENTS Other features and advantages of the invention will appear on reading the detailed description of implementations and non-limiting embodiments, with reference to appended figures in which: FIG. a schematic view in elevation of a shutter equipping a window, locked in partially open position according to the invention; Figure 2 is a partial schematic front view of a locking device partially housed in a slide, and comprising a slider mounted in a blade down along said slide, according to a preferred embodiment of the invention; Figure 3 is a partial schematic front view according to Figure 2, the slider being located on a resilient locking tab and pressing on the latter; Figure 4a is a partial schematic front view according to Figures 2 and 3, the cursor being located on a recess of the intermediate zone; Figure 4b is a partial schematic perspective view of a locking device housed entirely in a slide shown in transparency, the blade rising in the direction of the locking elastic tongue so that the cursor slides longitudinally along the recess; Figure 4c is a partial schematic sectional view in accordance with Figure 4b, illustrating the position of the slider below the elastic locking tongue during the ascent of the deck; Figure 5 is a partial schematic rear view of a locking device showing the cursor locked in translation; FIG. 6 is a partial diagrammatic front view according to FIGS. 2, 3 and 4a, the blade being lowered to the bottom of the locking device so that the slider has passed the distal end of the lower elastic tongue and is situated in the rear path of the locking device; Figure 7 is a perspective view of a locking device housed entirely in an illustrated slide with removal of material, during the ascent of the deck, the sliding slider in the rear path of the locking device; Figure 8 is an enlarged view of the base of a locking device, comprising a holding member fixed on a support of said device, according to one embodiment.

Description of an exemplary embodiment

The embodiments which will be described hereinafter are in no way limiting; it will be possible in particular to implement variants of the invention comprising only a selection of characteristics described hereinafter isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention compared in the state of the prior art. This selection comprises at least one feature preferably functional without structural details, or with only a part of the structural details if this part alone is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.

In particular, all the variants and all the embodiments described are intended to be combined with each other in any combination where there is no technical objection to it.

FIG. 1 illustrates a rolling shutter installation comprising an apron 1 formed of blades 2, 2a hinged together, the winding and unwinding of which around a shaft 3 is provided by a drive means 4, for example an engine electric. Alternatively, the drive could be provided by a manual system with a winch driven by a crank, or a strap.

The blades 2, 2a of the deck are guided on each longitudinal side by a generally vertical slide 5a, 5b, to a closed position. The slide generally has, in a cross section, at least one "U" profile forming a groove or a longitudinal cavity for receiving and sliding the deck blades. In the closed position, the deck 1 is unwound to a lower edge 51, also called threshold, a window or a door.

For the remainder of the description, the constituent elements of the installation will be described for a longitudinal side of the deck, since they are identical and arranged symmetrically with respect to the deck. The installation comprises a locking device B of the apron in a partially open position, for which the lower blade 2a is at a reduced distance E from the lower edge 51 of the window or door, as shown in FIG. locking device makes it possible to prevent the lifting of the apron from the outside by pulling on the lower blade 2a of the apron. The space left between the lower edge 51 and the lower blade 2a is insufficient for the passage of an individual.

Referring to Figures 2 to 7, the locking device B comprises a frame 6 which extends longitudinally along an axis substantially parallel to the axis of the slide 5a, 5b. According to various embodiments, the frame 6 may be partially housed (FIGS. 2, 3, 4a and 6) or totally (FIGS. 4b, 4c, 5 and 7) in the slide 5a, 5b. Referring to Figures 2, 3, 4a and 6, the frame 6 is partially housed in the slide 5a so that it is connected in the cavity of the slide and protrudes to the deck beyond the distal ends of the longitudinal edges from the slide. Referring to Figures 4b, 4c, 5 and 7, the frame 6 is housed completely in the slide so that it is fixed in the cavity of the slide and the longitudinal edges of the slide fully cover the frame 6. Referring In Figures 4b and 7, the locking device B comprises an intermediate plate 80 extending parallel to the axis of the slide. The intermediate plate 80 is connected in one piece with the locking device B. The locking device B bears against the slide and is fixed to the slide by means of the plate 80.

The locking device comprises a slider 14 extending along an axis substantially orthogonal to the plane of the unwrapped deck and is provided to cooperate with the frame 6 of the locking device B. The slider f 4 is mounted in translation, along an axis in the plane of the apron and substantially perpendicular to the axis of the slide, in the lower blade 2a with a resilient return device. The elastic return device makes it possible to push the slider towards the outside of the blade 2a and make it come into contact with the frame.

With reference to FIGS. 2, 4b, 5 and 6, the cursor comprises a finger f4 and a plate f5. The plate 15 slides in the blade 2a and in a direction parallel to the length of the blade 2a. Referring to Figure 5, the finger assembly 14 and platinum f 5 is biased resiliently by a spring f7, housed in the blade 2a. The finger assembly f4 and platinum 15 is housed in a ferrule f6 fixed inside and at the end of the lower blade 2a. The end piece 16 makes it possible to enclose the spring 17 and the plate 15 and to guide the plate 15 in rectilinear translation with respect to the blade 2a. Referring to Figures 2 to 4a and 4c to 7, the tip 16 comprises a groove 16r for guiding the translation of the plate 15 via the finger 14. The groove 16r avoids the bracing of the plate 15 in the tip 16.

The finger 14 has a substantially cylindrical shape and is arranged at right angles to the plate 15 (see in particular Figure 4b illustrating the tip in transparency), orthogonal to the plane of the rolled deck. Preferably, the finger is mounted in one piece with the plate.

During unrolling or winding, the lower blade 2a is guided along the slide through the tip 16, placed at the end of the blade 2a. Referring to Figures 2, 3, 4a, 6 and 7, the tip 16 slides in front of the frame 6, and the finger 14 extends in a direction substantially perpendicular to the plane of the unwrapped deck to cooperate with the frame 6.

The frame 6 comprises a face facing the blades 2, 2a of the deck, said front face of the frame, extending in a substantially longitudinal direction of the slide. The front face of the frame comprises three portions traversed by the finger 14, namely from top to bottom: an elastically deformable upper portion comprising an upper elastic tongue 40, an elastically deformable intermediate portion comprising an elastic locking tongue 20 and having a recess 9 , an elastically deformable lower portion comprising a lower elastic tongue 30, for guiding the finger 14 towards a rear path 7 of the frame 6.

With reference to FIGS. 2 to 7, the front face of the apron extends from the upper end of the upper elastic tongue 40 to the lower end of the lower tongue 30.

The frame 6 comprises a rear path 7 in which the finger 14 can slide to allow the winding of the deck. Preferably, the rear path comprises a groove disposed behind the frame 6. The frame comprises a so-called rear face of the frame, opposite to the front face of the frame, and extends between the lower end of the lower elastic tongue and the upper end of the upper elastic tongue; so that the face of the groove, opposite to the face facing the apron blades coincides with at least a portion of the rear face of the frame. The face of the groove coincides with the rear face of the frame is parallel to the direction of the slide. The faces of the frame are provided to be traversed by the finger 14 when rutilisateur wishes to position and block the deck at a distance E from the threshold of the window and when it wishes to wind the deck after having locked at a distance E.

With reference to FIGS. 2 to 7, the upper elastic tongue 40 is placed at the upper end of the frame 6, and has a front face 41 and a rear face 42. The upper elastic tongue 40 is connected, at a first end, to one piece with the rest of the frame 6. The front face 41 is merged with the front face of the frame and the rear face 42 is merged with the rear face of the frame. The upper elastic tongue 40 protrudes towards the slider 5a (slider 5b in Fig. 5) and extends upwardly in a substantially inclined direction. Preferably, the upper elastic tongue 40 is at rest in contact, by the rear face 42, with one face of the slide facing the frame. During the descent of the apron, the upper elastic tab 40 makes it possible to constrain the finger 14 to follow the front face of the frame opposite the apron, and prevents it from going down through the rear path. During the ascent of the apron, the tongue 40 is provided to deform elastically to the passage of the finger 14 on the rear face 42 when it comes from the rear path so as to allow the winding of the deck. The reliability of the apron guidance is improved. The front face 41 of the upper elastic tongue makes it possible, during the lowering of the apron, to guide the movement of the finger towards the elastic locking tab 20.

The elastic locking tab 20 has a front face 21 in the continuity of the front face 41 and is provided to guide the movement of the finger 14 (see Figure 3). The continuity of the surface of the front face of the frame avoids the jamming of the finger 14 during its sliding on the front face of the frame. The resilient locking tab 20 protrudes towards the apron. It extends downward in a substantially inclined direction. The elastic locking tab 20 is connected to its base in one piece with the frame 6. The resilient locking tongue 20 is provided to deform elastically to the passage of the finger 14 on the front face 21 of said tongue (see Figure 3 ) during the descent of the apron. The distal end of the tongue 20 approaches the frame 6. The resilient locking tab 20 has a rear face 22, opposite to the front face 21.

The rear face 22 of the resilient locking tongue 20 is opposite a portion of the front face of the frame recessed with respect to the front face 21 of the tongue 20, said recess 9. The space left between the rear face 22 of the tongue 20 and the portion of the recess facing the rear face 22 is at least equal to the diameter of the finger 14 (see Figure 5 showing the finger 14 between the rear face 42 and the recess 9). The recess 9 and the base of the rear face 22 form a fixed abutment 8 to stop the finger 14, when it goes up along the recess 9 (Figure 5). It has a surface substantially parallel to the longitudinal direction of the slide, in particular near the resilient locking tab 20. The recess 9 is extended by the surface of the fixed abutment 8 which extends itself by the surface of the face 22 of the tongue 20. The surface of the fixed stop 8 is oriented downwards. It has substantially the shape of a cylindrical half-tube. The recess 9 extends between the fixed stop 8 and the lower elastic tongue 30.

The surface of the recess is extended by the surface of the lower elastic tongue 30. With reference to FIGS. 2 to 4a, the lower elastic tongue 30 has a front face 31 in the continuity of the front face of the frame corresponding to the recess and is intended to guide the movement of the finger 14 towards the rear path 7, so that the finger is no longer in contact with the front face of the frame, and in particular the front face 31 of the lower tongue 30. FIGS. 6 and 7 show the finger 14 in the rear path 7. The continuity of the surface of the front face of the frame avoids the jamming of the finger 14 during its sliding on the front face of the frame. The lower elastic tongue 30 protrudes towards the apron. It extends downward in a substantially inclined direction. The lower elastic tongue 30 is connected to its base in one piece to the frame 6. The lower elastic tongue is provided to deform elastically to the passage of the finger 14 on the front face 31 of said tongue, in substantially the same way as during the passage of the finger 14 on the front face of the locking tongue.

The lower elastic tongue 30 has a rear face 32, opposite to the front face 31. The rear face 32 can guide, if necessary, the sliding of the finger 14 in the rear path 7 and allows the winding of the deck. The rear face 32 forms a ramp and is extended by the vertical groove of the rear path 7. The surface of the rear face 32 extends continuously with the surface of the groove to avoid the jamming of the finger 14 the along the back side of the building.

The resilient locking tab 20 as the lower elastic tongue 30 are provided to flex at the passage of the finger 14 from a rest position to a position in which the end distal the tongue is closer to the frame. In the rest position, the tongues extend in a direction forming a first non-zero angle relative to a vertical plane, when the finger is not in contact with a tongue. During the contact of the finger on a tongue due to the elastic return action applied by the spring 17, said tongue flexes and extends in a direction substantially parallel to the vertical plane or forming a second non-zero angle less than the first angle .

We will now describe the operation of the installation, and in particular the cooperation of the finger during its movement along the frame. The operation will be described with reference to Figures 2 to 8 for a longitudinal side of the deck, since the constituent elements are identical and arranged symmetrically with respect to the rolled deck.

When the user wishes to position and lock the apron at a distance E from the threshold of the window, the apron 1 descends along the slides 5a, 5b until the lower blade 2a arrives near the locking devices B. Referring to 2, the lower blade 2a is guided by the slide 5a and is located above the frame 6 of the locking device B. the finger 14 is positioned at the distal end of the tip 16 due to the action spring (not visible in this figure) and near a face of the slide 5a facing the apron. The finger 14 is located in particular just above an upper elastic tongue 40 which is located on the lowering path of the finger 14. Preferably, the end of the upper tab 40 is in contact with the face of the slide 5a facing the apron to ensure that the finger 14 comes into contact with the front face 41 of the tongue. This feature makes it possible to avoid an error guiding the finger 14. The upper tongue 40 is arranged to guide the movement of the finger 14, during the descent of the apron, along the front face 41 of the tongue. The front face 41 forms a ramp for the finger 14, which due to the descent of the apron, also causes the sliding of the finger assembly 14 and platen 15 in the longitudinal direction of the lower blade 2a. Referring to Figure 3, during the descent of the blade 2a and the sliding of the finger 14 along the front face 41, said finger 14 retracts to the blade 2a in the groove 16r of the tip 16, compressing the spring with elastic return. The finger 14 slides on a continuous surface of the front face of the frame to the front face 21 of the resilient locking tongue 20. FIG. 3 shows in particular the position when the finger 14 traverses the front face 21 of the tongue 20 The tongue 20 flexes because of the elastic properties thereof and the application of the finger 14 resiliently biased outwardly of the blade 2a via the elastic return spring. The application of the finger 14 causes the displacement of the distal end of the tongue 20 from its inclined rest position, illustrated in FIG. 2, to a substantially vertical position, illustrated in FIG. 3. The elastic restoring force of the tongue 20 acts against the restoring force of the resilient return spring of the finger 14. According to the embodiments of the tongue 20, the angle formed between the direction of the tongue, during the passage of the finger 14 , can vary a few degrees around a vertical plane.

Further down, and with reference to Figures 4a and 4b, the finger 14 bears on the recess 9. The tongue 20 then returned to its initial position, substantially inclined, because the finger has exceeded the distal end of the tongue elastic locking. The elastic tongue allows both the passage of the finger 14 during the descent of the apron through the elastic deformation thereof, and blocks by the rear face 22 said finger 14 if it ever went up immediately or if the force of recall of the elastic spring was not sufficient; case illustrated in Figure 4c. In addition, the spring with elastic return is released in compression because the surface of the recess 9 is set back with respect to the front face 21 of the tongue 20.

Referring to Figure 5, the deck is raised (just after being lowered with reference to Figures 4a, 4b and 4c) until the finger 14 is stopped in translation by the fixed stop 8. The finger 14 is guided without resistance against the surface of the recess until the fixed stop 8 which stops its translation upwards. The apron is then positioned and locked in a half-open position so that the lower blade 2a is at a distance E from the lower edge of a window or door.

When the user wishes to raise the apron, the latter must first descend to the lower end of the lower elastic tongue 30 to guide the finger 14 to the rear path 7. The behavior of the lower elastic tongue 30 with the finger 14 is the same as that of the elastic locking tongue 20 with the finger 14 seen previously. With reference to FIG. 6, the blade 2a is lowered enough so that the finger 14 has passed the distal end of the lower tongue 30. The lower elastic tongue returns to its initial position, which is substantially inclined, to make it possible to block, by the rear face of the lower tongue, raising the finger to the recess. The lower tongue 30 makes it possible to direct the finger out of the face facing the apron.

In addition, the spring with elastic return released in compression. The finger 14 is then in the rear path 7. Referring to Figure 7, the blade 2a is raised so that the finger 14 is in the groove of the rear path 7. The rear path 7 allows the winding of the apron .

Before leaving the locking device during the ascent of the apron, the upper elastic tongue 40 is on the raising path of the finger 14. The tongue 40 then deforms elastically at the passage of the finger 14 on the rear face 42.

Preferably, the locking device B comprises a transverse retaining element 60, on which the slide is supported so as to block the translation of the locking device relative to the slide.

With reference to FIG. 8, the transverse retaining element is a support 60 extending transversely to the base of the locking device B. The support 60 is intended to be applied to the lower edge of the window or door, the slide pressing on the support to press against the lower edge.

The support 60 optionally comprises a holding element 61 extending vertically and parallel to the locking device B. Said support bears against the lower edge of the window or door and said holding element 61 is inserted in a cavity of the slide so that a wall, of non-zero thickness, of said slide is located between the holding member 61 and the locking device B and rests on the support 60 of the locking device B.

Advantageously, the installation comprises a second locking device similar to the first device, the second device having its own frame extending in a direction substantially parallel and close to the axis of the other slide 5b, as well as its own mounted slider in translation along an axis substantially perpendicular to the axis of the slide, in the blade, in which is mounted the first slider, the two locking devices contributing to recenter said blade relative to the slides.

Claims (16)

claims 1. Installation of roller shutter comprising: an apron (1) formed of blades (2, 2a) hinged together, including winding / unwinding around a shaft (3) is provided by a drive means (4), the blades (2, 2a) of the apron being guided on each side by a slide (5a, 5b), the apron can be unwound to the bottom of a window or door in the closed position, at least one blocking device (B) of the apron in a partially open position for which the lower blade (2a) is at a reduced distance (E) from the lower edge of the window or door, in particular insufficient to allow the passage of a person, characterized in that said locking device (B) comprises a frame (6) extending in a direction substantially parallel and close to the axis of one of the slides (5a) and, a slider (14) s extending along an axis substantially orthogonal to the plane of the apron, said center seur being mounted in translation along an axis substantially perpendicular to the axis of the slide, in one of the blades (2, 2a), and connected to said blade with an elastic return device (17), said frame (6) whose face facing the blades (2, 2a) of the apron comprises three portions traversed by said slider, namely an upper elastically deformable portion and adapted to compress the elastic return device (17) downhill, an elastically deformable intermediate portion provided with at least one recess (9) releasing the compression of the elastic return device (17) and preventing the raising of the slider (14), a lower elastically deformable guide portion to a rear path (7) of the locking device to allow the raising the cursor (14). 2. Installation according to claim 1, characterized in that the intermediate portion comprises at least one recess (9) forming a fixed stop (8) to stop the slider (14) during a recovery of the apron (1). 3. Installation according to claim 1 or 2, characterized in that the intermediate portion comprises at least one elastic locking tongue (20) projecting towards the deck, having a front face (21) and a rear face (22), at least one elastic locking tongue (20) being arranged to guide the movement of the slider (14): during the lowering of the apron, along the front face (21) of the locking tab towards the recess (9) , and during the ascent of the apron, along the rear face (22) to the recess (9) forming the stop (8). 4. Installation according to claim 3, characterized in that the recess (9), at least a portion of which has a surface substantially parallel to the axis of the slide, is extended by the stop (8) whose surface is oriented towards the bottom and is extended by the rear face (22) of the elastic locking tongue. 5. Installation according to one of claims 1 to 4, characterized in that the intermediate portion comprises a plurality of recesses (9) and a plurality of resilient locking tabs (20) distributed vertically along the intermediate portion. 6. Installation according to one of claims 1 to 5, characterized in that the lower portion comprises a lower elastic tongue (30), located near the lower part of a window or a door in the closed position, making projecting towards the apron, having a front face (31) and a rear face (32), said lower tongue being arranged to guide the movement of the slider: during the descent of the apron, on the front face (31) of the tongue towards a lower end of the locking device, and during the ascent of the deck, on the rear face (32) of the tongue to the rear path (7) to allow the winding of the deck. 7. Installation according to one of claims 2 to 6, characterized in that each elastic locking tongue (20) and the lower elastic tongue (30) extend downwards, and: in a direction forming a first angle not -nul relative to a vertical plane when the slider (14) is not in contact with said tongue (20, 30), and in a direction substantially parallel to the vertical plane or forming a second non-zero angle less than the first angle when the slider (14) is in contact with said tongue (20, 30), the tongue (14) flexes by the action of the slider (14). 8. Installation according to one of claims 1 to 7, characterized in that the rear path (7) comprises a groove in the frame (6). 9. Installation according to one of claims 3 to 8, characterized in that the upper portion of the frame (6) comprises an upper elastic tongue (40) at its upper end, projecting towards the slide, and having a front face (41) and a rear face (42), said upper tongue being arranged to guide the movement of the slider, during the descent of the apron, along the front face (41) of the tongue, towards the at least an elastic locking tongue (20) sliding the slider (14). 10. Installation according to one of claims 2 to 9, characterized in that each tongue (20, 30, 40) has a substantially curvilinear profile and extends along a width of between 5 and 15mm. 11. Installation according to one of claims 1 to 10, characterized in that the slider (14) is a finger (14) mounted on a plate (15) in a tip (16) engaged in the lower blade (2a) of apron, the plate (15) slidable in a direction parallel to the length of the blade, and being resiliently biased into a rest position, which tends to push the finger (14) towards the outside of the blade, the finger ( 14) being arranged at right angles to the plate (15), orthogonal to the plane of the rolled deck. 12. Installation according to one of claims 1 to 11, characterized in that it comprises a second locking device similar to the first device, the second device comprising a frame extending in a substantially parallel direction and close to the axis the other slide (5b), and a slider mounted in translation along an axis substantially perpendicular to the axis of the slide, in the blade, in which is mounted the first slider, the two locking devices contributing to recenter said blade relative to the wings. 13. Installation according to one of claims 1 to 12, characterized in that the frame (6) is housed partially or completely in the slide (5a, 5b). 14. Installation according to one of claims 1 to 13, characterized in that the frame (6) is a thermoplastic of the polyamide type loaded with glass fibers. 15. Installation according to one of claims 1 to 14, characterized in that the locking device (B) is fixed to the slide (5a, 5b) by screwing. 16. Installation according to one of claims 1 to 15, characterized in that the locking device (B) has a transverse retaining element (60), on which the slide is supported so as to block the translation of the frame (6). ) relative to the slide (5a, 5b).