ES2746019T3 - Roller shutter installation comprising a deck locking device - Google Patents

Abstract

Roller shutter installation comprising: - a board (1) formed by slats (2, 2a) articulated with each other, whose winding / unwinding around a tree (3) is guaranteed by a means of dragging (4), the slats ( 2, 2a) of the board are guided on each side by a rail (5a, 5b), the board can be unrolled to the bottom of a window or door in the closed position, - at least one locking device (B) of the board in a partially open position for which the lower slat (2a) is located at a reduced distance (E) from the lower edge of the window or door, in particular insufficient to allow the passage of a person, said lock (B) comprises - a frame (6) that extends in a direction substantially parallel to the axis of the rail and, - a cursor (14) that extends along an axis substantially orthogonal to the plane of the board, said cursor is mounted in translation following a substantially sensitive axis fitted to the axis of the rail, in one of the slats (2, 2a) and attached to said slat with an elastic recovery device (17), said frame (6), the face of which faces the slats (2, 2a) The board comprises three portions covered by said cursor, namely - an upper portion capable of compressing the downward elastic recovery device (17), - an intermediate portion provided with at least one slit (9) that loosens the compression of the device of elastic recovery (17) and prevents the slider (14) from rising, - a lower guide portion towards a rear path (7) of the locking device to allow the slider (14) to rise, characterized in that said upper portion, said portion intermediate and said lower frame portion (6) are respectively elastically deformable, and because said cursor (14) when applied on one of said frame portions (6), varies the position of the considered portion, the considered portion ada returns to its initial resting position when application ceases.

Description

DESCRIPTION

Roller shutter installation comprising a deck locking device

[0001] The present invention relates to a roller shutter installation intended to equip a window or a door.

[0002] The invention relates in particular to a roller shutter installation comprising a board formed by slats hinged together and guided on each longitudinal side by a rail, the board can be rolled and unwound from or respectively to the lower edge of a window or door in closed position. The roller shutter installation comprises a panel locking device in a locked and partially open position for which the lower panel slat is located at a reduced distance from the lower edge of a window or door to prevent the passage of a person between the board and said bottom edge. The locking device comprises a cursor mounted in translation on one of the slats of the board, said cursor is intended to travel the face of the locking device in front of the board, said face comprises at least three portions for guiding the cursor so as to guide the board between different positions, with a half-open position of the board.

State of the prior art

[0003] From the same applicant, document FR 3009577 is known which describes a roller shutter installation according to the preamble of claim 1, namely, an installation comprising a board formed by slats articulated with each other and guided on each longitudinal side by a track, where the dash can be unrolled to the bottom of a window or door in the closed position. The installation includes a longitudinally extending cam capable of cooperating with a finger mounted in translation on a slat of the board. The cam has a rectilinear intermediate part, and a high part curved downwards that makes a stop for the finger. The cam also has an inclination at each upper and lower end to guide the movement of the finger. When the user orders the descent of the board, the finger finds the upper slot, which implies the movement of the finger in the slat, then the slat finds the intermediate part. When you climb the board, your finger finds the bottom slot that pushes your finger to the left, before following another rectilinear part.

[0004] However, the cam is not adapted to all types of rails.

[0005] The objective of the invention is to adapt to any type of traditional and renovation rail, without creating specific rails. Another objective is to facilitate the assembly of the installation, that is, to facilitate the adjustment of the positioning of the locking device with respect to the rail, the guide and the cursor at the same time thanks to the elastic tabs.

Description of the Invention

[0006] At least one of the objectives is achieved with a roller shutter installation according to claim 1, which comprises a board formed by slats articulated with each other, whose winding or unwinding around a tree is guaranteed by a means of drag, the Board slats are guided on each side by a rail; the board can be unrolled to the bottom of a window or door in the closed position.

[0007] The installation comprises a panel locking device in a partially open position for which the lower panel slat is at a reduced distance from the lower edge of the window or door, in particular insufficient to allow the passage of a person.

[0008] According to the invention, the locking device comprises:

- a frame that extends in a direction substantially parallel to the axis of the rail and,

- a slider that extends along an axis substantially orthogonal to the plane of the board, said slider is mounted in translation along an axis substantially perpendicular to the axis of the rail, in one of the slats, and connected to said slat with an elastic recovery device.

[0009] The frame extends longitudinally along the axis of the rail and presents a face facing the slats of the board. The face opposite the board has three portions covered by said cursor. The cursor enables the board to be guided with respect to the locking device during winding or unwinding.

[0010] According to the invention, the face opposite the board includes:

- an elastically deformable upper portion capable of compressing the downward elastic recovery device,

- an elastically deformable intermediate portion provided with at least one slit that loosens the compression of the elastic recovery device and prevents the cursor from rising,

- an elastically deformable lower portion for guiding towards a rear path of the locking device to allow the cursor to rise. Said cursor, when applied on one of the frame portions, varies the position of the considered portion, the considered portion returns to its initial rest position when the application ceases.

[0011] According to the invention, each elastically deformable portion has an outer face facing the board, called the front face and an inner face opposite to the outer face, called the rear face.

[0012] An elastically deformable portion of the face of the frame is understood to be a movable portion between a rest position and a position for passing the cursor, said mobility being expressed mainly in the plane of the board. During the application of an element such as the cursor on one of the faces, exterior or interior, of the considered portion, it causes the position of said portion to vary. When application ceases, the elastic portion returns to its initial resting position.

[0013] The person skilled in the art will know how to design the elastically deformable portions of the face of the frame, as well as the elastic recovery device for the cursor, so that, during the passage of the cursor, the position is deformed elastically while the cursor, in support against said portion, moves to a plane of the board and along an axis substantially perpendicular to the axis of the rail.

[0014] Specifically, you know ensure that the stiffness of the elastically deformable portions, and the rigidity of the elastic return device are not too high to allow the elastic deformation of the portion and the flexible return device.

[0015] Also know ensure that the stiffness of the elastically deformable portions are not too far from the rigidity of the flexible return device, and that to allow the elastic deformation of the two mating parts (portion and recovery device).

[0016] Each portion preferably comprises at least one elastically deformable tongue. Each elastically deformable tab is attached to a first end with the face of the frame facing the board. Each tab, close to the first end, can be elastically articulated or deformed between the rest position and the position of passage of the cursor that sets said tab in motion. The movement of each tab near a second end called the distal end, opposite the first end, has a substantially circular arc path.

[0017] The installation according to the invention makes it possible to improve the guide of the cursor both in descent and in ascent thanks to the elastically deformable portions that force the cursor to position itself under the stop. The guidance of the end slats of the board is improved in this way.

[0018] Each elastic tongue extending towards the board can, because of its elasticity, protrude and extend more towards the board than the prior art stop or bottom tilt. The tab protrudes towards the board so that the distance between the distal end of the tabs and the indentation is 10-20 mm. This feature allows to offer a mounting tolerance of the locking device with respect to both the rail and the cursor. If the locking device is positioned in a way that would be considered as too far away for the prior art cam stop, the length of the elastic tongue allows to compensate for a possible positioning deviation and allows the tongue to cooperate extending towards the board with the cursor. This facilitates the mounting of the locking device. The locking device according to the invention allows adapting to any type of rail.

[0019] According to a preferred embodiment, the slider is mounted on the lower slat near one end thereof. This arrangement makes it possible to lock in translation all the slats of the board and ensure that the reduced distance, that is, the space left between the lower slat and the edge of the window, will remain fixed, preventing the passage of a person and avoiding lifting the blind from the outside.

[0020] According to the invention, the intermediate portion comprises at least one slit that forms a fixed stop to stop the cursor during a rise of the board. This embodiment allows a stop in translation in a simple way.

[0021] Preferably, the elastically deformable intermediate portion comprises at least one elastic locking tab projecting towards the board and having a front face and a rear face. The elastic locking tab, at a first end, is joined in one piece to the frame of the locking device. It is intended to elastically deform when the cursor passes over the front face of said tongue. The elastic locking tab extends downward in a steeply inclined direction:

- during the descent of the board, along the front face of the elastic locking tab towards the slit; the elastic recovery force of the tongue acts against the recovery force of the recovery device the cursor, and

- during the ascent of the deck, along or near the rear face of the elastic locking tab towards the slit that forms the stop; the recovery force of the elastic recovery device of the slider acts on the slider to direct it towards the outside of the slat and to press it against the slit.

[0022] During the descent of the board, the elastic locking tongue allows the passage of the cursor thanks to the elastic deformation of the latter, the cursor runs along the front face of the elastic locking tongue. Once the cursor has passed the distal end of the elastic locking tab, the latter returns to its initial position, slightly inclined. The elastic locking tab blocks said slider on the rear face in the event that it is lifted immediately or if the recovery force of the elastic recovery device is not sufficient.

[0023] Preferably, the slit, one of the parts of which at least has a surface substantially parallel to the axis of the rail, is extended upwards by the stop. During the ascent of the deck, the cursor, which has crossed the elastic locking tongue and which rests against the surface of the slit, can be guided without resistance to the fixed stop that stops the translation upwards. The surface of the stop is substantially in the form of a half cylindrical tube. The surface of the stop faces downward and extends, towards the opposite side to this of the slit surface, by the rear face of the elastic locking tab. The fixed stop has the advantage of blocking the roll of the board in a partially open position, so that the lower slat is at a reduced distance from the threshold of a window or door. In the event that the slider is not resting against the reinforcing surface, the slider is stopped in translation by the rear face of the elastic locking tab which is substantially inclined.

[0024] Optionally, the intermediate portion comprises several grooves and several elastic locking tabs distributed vertically along the intermediate portion. It is possible to choose different locking heights according to the user's desire.

[0025] According to the invention, the lower portion comprises a lower elastic tongue, located near the lower part of a window or door in the closed position, projecting towards the board, which has a front face and a rear face. The lower elastic tab, at a first end, is joined in one piece to the frame of the locking device. The lower elastic tongue is provided to elastically deform with the passing of the cursor on the front face of said tongue. The bottom elastic tab extends downward in a substantially inclined direction. Said lower tab is conditioned to guide the movement of the cursor:

- during the descent of the board, on the front face of the tongue towards a lower end of the locking device; the elastic recovery force of the lower tongue acts against the recovery force of the cursor recovery device, and

- during board ascent, on or near the rear face of the tongue towards the rear path to allow the board to roll up.

[0026] The lower tab allows the cursor to be directed away from the front face of the board. Once the cursor has passed the distal end of the lower elastic tab, it returns to its initial position, substantially inclined, so that it blocks the cursor from rising towards the intermediate portion through the rear face of the lower tab. The rear path allows the slider to be slid longitudinally during roll-up of the board.

[0027] According to a preferred embodiment, each elastic locking tab and the bottom elastic tab extend downward, and

- in a direction that forms a first non-zero angle with respect to a vertical plane when the cursor is not in contact with said tongue, and

- in a direction substantially parallel to the vertical plane or that forms a second non-zero angle less than the first angle, when the cursor is in contact with said tongue, it is bent by the action of the cursor attached to the elastic recovery device.

[0028] The elastic locking tongue and the lower elastic tongue protrude towards the board so that the separation between the distal end of the tongues and the groove is 10 to 20 mm. Even if the frame is attached to a rail so that it is offset from a reference position, the cursor can cooperate with the rear face of the tabs. This facilitates the mounting of the locking device. The locking device according to the invention allows adapting to any type of rail.

[0029] According to another embodiment, the elastically deformable portions are made by spring devices, for example, leaf spring.

[0030] Preferably, the rear path comprises a slot conditioned in the frame. The slot allows the cursor to be guided along the rear path of the frame.

[0031] According to the invention, the upper portion of the frame comprises an upper elastic tab, placed at the upper end of the frame, protruding in the direction of the rail, and having a front face and a rear face. The upper elastic tab, at a first end, is joined in one piece to the frame of the locking device. The upper elastic tab is provided to deform elastically with the passage of the cursor on the rear face of said tab when the cursor, which comes from the rear path of the rail, rises in a way that allows the board to be rolled up. The upper elastic tongue extends upwards in a substantially inclined direction. Said upper tongue is arranged to guide the movement of the cursor, during the ascent of the board, along the front face of the tongue, towards at least one elastic locking tongue, which slides the cursor mounted in translation towards the slat. Preferably, the upper elastic tab is, at rest, in contact with a face of the rail facing the frame of the locking device. The upper elastic tab allows the cursor to be forced to follow the face of the frame in front of the board, and prevents the cursor from descending through the rear path. Board guidance reliability improves.

[0032] Preferably, each tongue has a substantially curvilinear profile and extends along a width of between 5 and 15 mm.

[0033] Preferably, the cursor is a finger mounted on a plate in a tip inserted in the lower slat of the board. The plate can slide in a direction parallel to the length of the slat, and it recovers elastically in a rest position. The elastic recovery device tends to push the finger towards the outside of the blade. The finger is arranged at a right angle to the plate, orthogonal to the plane of the unrolled board.

Advantageously, the installation comprises a second locking device similar to the first one, the second device comprises a second cursor mounted in translation following an axis substantially perpendicular to the axis of the rail on the board on which the first cursor is mounted, the two locking devices they participate to re-center said tablet with respect to the rails.

[0034] According to different embodiments, the frame is partially or totally housed in the rail. The frame can be fully accommodated on the rail so that the frame is fully within the rail congestion volume. Preferably, the frame of the block device is fixed inside a groove in the rail so that the frame is not visible from the outside when the board is in the closed position. If the frame is partially housed in the rail, it exceeds the congestion volume of the rail and is visible from the outside.

[0035] Preferably, the frame is a thermoplastic of the polyamide type loaded with glass fibers.

[0036] Preferably, the locking device is fixed to the rail by screwing. For example, the locking device comprises an intermediate plate that extends parallel to the axis of the rail. The intermediate plate is joined in one piece to the locking device. The locking device rests against the rail and is fixed to the rail by the plate.

[0037] More preferably, the locking device has a transverse retention element, where the rail is supported in such a way that it blocks the translation of the locking device with respect to the rail.

[0038] For example, the transverse retaining element is a support from which extends, vertically and parallel to the distance from the frame, a fastening element of the locking device. Said support rests against the lower edge of the window or door and said fastening element is inserted into a cavity of the rail so that a wall, of a non-zero thickness, of said rail is located between the fastening element and the frame and rests on the frame support.

[0039] This feature has the advantage of blocking the translation of the blocking device in a simple and inexpensive way.

Description of the figures and the embodiments

[0040] Other characteristics and advantages of the invention will appear more clearly upon reading the detailed description of applications and of absolutely non-limiting embodiments, in relation to the attached figures where:

figure 1 is a schematic elevation view of a roller shutter that equips a window, locked in a partially open position according to the invention;

figure 2 is a partial schematic front view of a locking device partially housed in a rail, and comprising a slider mounted on a slat that descends along said rail, according to a preferred embodiment of the invention;

FIG. 3 is a partial schematic front view according to FIG. 2, where the cursor is located on and rests on an elastic locking tab;

figure 4a is a partial schematic front view according to figures 2 and 3, where the cursor is located on a slit in the intermediate area;

figure 4b is a partial schematic perspective view of a locking device housed entirely on a rail illustrated in transparency, the slat rises in the direction of the elastic locking tab so that the slider slides longitudinally along the slit ;

figure 4c is a partial schematic sectional view according to figure 4b, illustrating the position of the cursor underneath the elastic locking tab during board ascent;

figure 5 is a partial schematic rear view of a locking device showing the locked cursor in translation;

FIG. 6 is a partial schematic front view according to FIGS. 2, 3 and 4a, where the blade is lowered down to the locking device so that the cursor has passed the distal end of the lower elastic tab and is positioned at the rear path of the locking device;

Figure 7 is a perspective view of a locking device housed entirely on an illustrated rail with removal of material, during the ascent of the board, with the cursor sliding in the rear path of the locking device;

figure 8 is an enlarged view of the base of a locking device comprising a fastening element fixed on a support of said device, according to an embodiment.

Description of an exemplary embodiment

[0041] The embodiments to be described below are not at all limiting, in particular variants of the invention may be carried out which only comprise a selection of the characteristics described below isolated from the other characteristics described, if this selection of Features is sufficient to confer a technical advantage or to differentiate the invention from the prior art. This selection comprises at least one functional preference feature without structural details, or with only a part of the structural details if this part is only sufficient to confer a technical advantage or to differentiate the invention from the prior art.

[0042] In particular, all the variants and all the described embodiments are intended to be combined with each other in all the combinations where nothing is opposed on the technical level.

[0043] Figure 1 illustrates a roller shutter installation comprising a board 1 formed by slats 2, 2a articulated with each other, whose winding and unwinding around a shaft 3 is guaranteed by a drive means 4, for example, a motor technical. In a variant, the drag could be carried out by a manual system with a winch pulled by a crank, or by a belt.

[0044] The slats 2, 2a of the board are guided, on each longitudinal side, by a rail 5a, 5b, generally vertical, to a closed position. The rail generally has, following a cross section, at least one "U" profile that forms a slot or longitudinal cavity to receive and slide the slats of the board. In the closed position, the panel 1 is unwound to a lower edge 51, also called a threshold, of a window or a door.

[0045] In the continuation of the description, the constituent elements of the installation for a longitudinal side of the board will be described, since they are identical and are arranged symmetrically with respect to the board.

[0046] The installation comprises a panel locking device B in a partially open position for which the lower slat 2a is at a reduced distance E from the lower edge 51 of the window or door, as illustrated in the figure 1. The locking device allows to prevent the elevation of the board from the outside by pulling the lower slat 2a of the board. The space remaining between the lower edge 51 and the lower slat 2a is insufficient for the passage of an individual.

[0047] With reference to Figures 2 to 7, the locking device B comprises a frame 6 that extends longitudinally following an axis substantially parallel to the axis of the rail 5a, 5b. Following different achievements, the Frame 6 can be housed indifferently partially (Figures 2, 3, 4a and 6) or totally (Figures 4b, 4c, 5 and 7) on rail 5a, 5b. With reference to Figures 2, 3, 4a and 6, the frame 6 is partially housed in the rail 5a so that it is attached to the cavity of the rail and protrudes towards the board beyond the distal ends of the longitudinal edges of the rail. With reference to Figures 4b, 4c, 5 and 7, the frame 6 is completely housed in the rail so that it is fixed in the cavity of the rail and that the longitudinal edges of the rail completely cover the frame 6. With reference to the figures 4b and 7, the locking device B comprises an intermediate plate 80 that extends parallel to the axis of the rail. The intermediate plate 80 is joined in one piece with the locking device B. The locking device B is supported against the rail and is fixed to the rail by plate 80.

[0048] The locking device comprises a slider 14 that extends along an axis substantially orthogonal to the plane of the unrolled board and is intended to cooperate with the frame 6 of the locking device B. The slider 14 is mounted in translation, following an axis in the plane of the board and substantially perpendicular to the axis of the rail, on the lower slat 2a with an elastic recovery device. The elastic recovery device allows the cursor to be pushed out of the slat 2a and make it come into contact with the frame.

[0049] With reference to Figures 2, 4b, 5 and 6 the cursor comprises a finger 14 and a plate 15. The plate 15 slides on the slat 2a and following a direction parallel to the length of the slat 2a. With reference to figure 5, the finger 14 and plate 15 assembly is elastically recovered by means of a spring 17 housed in the blade 2a. The finger 14 and plate 15 assembly is housed in a end piece 16 fixed inside and at the end of the lower slat 2a. The end piece 16 makes it possible to enclose the spring 17 and the plate 15 and guide the plate 15 in rectilinear translation, with respect to the blade 2a. With reference to Figures 2 to 4a and 4c to 7, the end piece 16 comprises a groove 16r to guide the translation of the plate 15, by means of the finger 14. The groove 16r avoids the sagging of the plate 15 inside the end piece 16.

[0050] The finger 14 has a substantially cylindrical shape and is arranged at a right angle to the plate 15 (see specifically figure 4b illustrating the tip in transparency), orthogonal to the plane of the unrolled board. The finger is preferably mounted in one piece with the plate.

[0051] During winding or unwinding, the bottom sheet 2a is guided along the rail by end piece 16, placed at the end of the slat 2a. With reference 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 unrolled board to cooperate with the frame 6.

[0052] The frame 6 comprises a face facing the slats 2, 2a of the board, called the front face of the frame, which extends in a substantially longitudinal direction of the rail. The front face of the frame comprises three portions traversed by finger 14, namely from top to bottom:

- an elastically deformable upper portion comprising an upper elastic tab 40,

- an elastically deformable intermediate portion comprising an elastic locking tongue 20 and having a slit 9,

- an elastically deformable lower portion comprising a lower elastic tongue 30, allowing the finger 14 to be guided towards a rear path 7 of the frame 6.

[0053] With reference to Figures 2 to 7, the front face of the board extends from the upper end of the upper elastic tab 40 to the lower end of the lower tab 30.

[0054] The frame 6 comprises a rear path 7, where the finger 14 can slide to allow the board to be rolled up. Preferably, the rear path comprises a slot disposed behind the frame 6. The frame comprises a face called the rear face of the frame, opposite the front face of the frame, and extends between the lower end of the lower spring tab and the upper end of the upper elastic tab, so that the face of the groove, opposite to the face in front of the slats of the board, fuses with at least a part of the rear face of the frame. The face of the groove fused with the rear face of the frame is parallel to the direction of the rail. The faces of the frame are intended to be traversed by finger 14 when the user wants to position and lock the board at a distance E from the window threshold and when he wants to roll up the board after having locked it at a distance E.

[0055] With reference to Figures 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 joined, in a first end, by a single piece with the rest of the frame 6. The front face 41 is fused with the front face of the frame and the rear face 42 is fused with the rear face of the frame. The upper elastic tab 40 protrudes in the direction of the rail 5a (rail 5b on FIG. 5) and extends upward in a substantially inclined direction. Preferably, the upper elastic tab 40 is at rest in contact, by means of the rear face 42 with a face of the rail opposite the frame. During the descent of the board, the upper elastic tab 40 allows the finger 14 to be forced to follow the front face of the frame in front of the board, and prevents it from descending by passing through the rear path.

During the ascent of the board, the tongue 40 is provided to elastically deform with the passage of the finger 14 on the rear face 42 when it comes from the rear path so as to allow the board to be rolled up. Board guidance reliability improves. The front face 41 of the upper elastic tongue, in the descent of the board, allows guiding the movement of the finger towards the elastic locking tongue 20.

[0056] The elastic locking tongue 20 has a front face 21 in the continuity of the front face 41 and is intended to guide the movement of the finger 14 (see figure 3). The continuity of the surface of the front face of the frame allows to avoid sagging of the finger 14 during its sliding on the front face of the frame. The elastic locking tab 20 protrudes towards the board. It extends downward in a noticeably inclined direction. The elastic locking tongue 20 is attached to its base by a single piece with the frame 6. The elastic locking tongue 20 is intended to elastically deform with the passage of the finger 14 on the front face 21 of said tongue (see figure 3) , during the descent of the board. The distal end of the tab 20 approaches the frame 6. The elastic locking tab 20 has a rear face 22 opposite the front face 21.

[0057] The rear face 22 of the elastic locking tab 20 is opposite a part of the front face of the frame removed with respect to the front face 21 of the tongue 20, called slit 9. The space left between the rear face 22 of the tongue 20 and the part of the groove opposite 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 groove 9). The slit 9 and the base of the rear face 22 form a fixed stop 8 to stop the finger 14 when it rises along the slit 9 (figure 5). It has a surface substantially parallel to the longitudinal direction of the rail, in particular near the elastic locking tongue 20. The slit 9 is prolonged by the surface of the fixed stop 8, which in turn is prolonged by the surface of the rear face 22 of the the tongue 20. The surface of the fixed stop 8 faces downwards. It is substantially in the form of a half cylindrical tube. The slit 9 extends between the fixed stop 8 and the lower elastic tongue 30.

[0058] The surface of the slit is prolonged by the surface of the lower elastic tongue 30. With reference to Figures 2 to 4a, the lower elastic tongue 30 has a front face 31, in the continuity of the front face of the corresponding frame to the slit 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. Figures 6 and 7 show the finger 14 in the rear path 7. The continuity of the surface of the front face of the frame allows to avoid sagging of the finger 14 during its sliding on the front face of the frame. The lower elastic locking tab 30 protrudes towards the board. It extends downward in a noticeably inclined direction. The lower elastic tongue 30 is joined to its base by a single piece with the frame 6. The lower elastic tongue is intended to elastically deform with the passage of the finger 14 on the front surface 31 of said tongue, in substantially the same way as during passing finger 14 over the front face of the locking tab.

[0059] The lower elastic tab 30 has a rear face 32 opposite to the front face 31. The rear face 32 allows to guide, if necessary, the sliding of the finger 14 in the rear path 7 and allows the board to be rolled up. The rear face 32 forms an incline and is extended by the vertical groove of the rear path 7. The surface of the rear face 32 is continuously extended with the surface of the groove to avoid warping of the finger 14 along the face rear of the frame.

[0060] Both the elastic locking tab 20 and the lower elastic tab 30 are provided to bend with the passage of the finger 14 from a rest position to a position where the distal end of the tab is brought closer to the frame. In the rest position, the tabs extend in one direction at a first non-zero angle to a vertical plane, when the finger is not in contact with a tab. During finger contact on a tongue due to the elastic recovery action applied by spring 17, said tongue bends and extends in a direction substantially parallel to the vertical plane or forming a second non-zero angle less than the first angle.

[0061] Next, the operation of the installation, and in particular the cooperation of the finger during its movement along the frame, will be described. The operation will be described with reference to Figures 2 to 8 for a longitudinal side of the board, since the constituent elements are identical and are arranged symmetrically with respect to the unrolled board.

[0062] When the installer wishes to position and lock the board at a distance E from the window threshold, the board 1 descends along the rails 5a, 5b until the lower slat 2a comes close to the locking devices B. With reference to Figure 2, the lower slat 2a is guided by the rail 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 of the spring (not visible in this figure) and near one side of rail 5a in front of the board. The finger 14 is located in particular just above an upper elastic tab 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 rail 5a opposite the board for ensuring that the finger 14 comes into contact with the front face 41 of the tongue. This feature allows avoiding a finger guiding error 14. The upper tab 40 is conditioned to guide the displacement of the finger 14 during the descent of the board, along the front face 41 of the tab. The front face 41 forms a ramp for the finger 14, which given the lowering of the board also drags the sliding of the finger 14 and plate 15 assembly in the longitudinal direction of the lower slat 2a. With reference 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 towards the blade 2a in the groove 16r of the end piece 16, which compresses the spring elastic recovery. The finger 14 slides on a continuous surface from the front face of the frame to the rear face 21 of the elastic locking tongue 20. Figure 3 shows in particular the position when the finger 14 traverses the front face 21 of the tongue 20. The tongue 20 bends due to its elastic properties and the application of the finger 14 elastically recovered towards the outside of the blade 2a through the elastic recovery spring. The application of the finger 14 causes the distal end of the tongue 20 to move from its inclined rest position, illustrated by figure 2 to a substantially vertical position, illustrated by figure 3. The elastic recovery force of the tongue 20 acts against the recovery force of the elastic recovery 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 may vary a few degrees around a vertical plane.

[0063] When descending further, and with reference to Figures 4a and 4b, the finger 14 rests on the slit 9. The tongue 20 then recovers its initial position, substantially inclined, because the finger has passed the distal end of the tongue elastic lock. The elastic tab allows at the same time the finger 14 to pass during the descent of the board thanks to the elastic deformation of the board, and blocks said finger 14 on the rear face 22 in the event that it rises immediately or if the recovery force of the elastic recovery spring was not enough; case illustrated in figure 4c. Furthermore, the compression of the elastic recovery spring is loosened because the surface of the slit 9 is withdrawn from the front face 21 of the tongue 20.

[0064] With reference to figure 5, the board rises (just after having descended with reference to figures 4a, 4b and 4c) until the finger 14 stops in translation by the fixed stop 8. The finger 14 is guided without resistance against the surface of the slit up to the fixed stop 8 that stops its translation upwards. The board is positioned and locked in a half-open position such that the bottom sheet 2a is at a distance E from the bottom edge of a window or door.

[0065] When the user wishes to climb the board, the latter must first descend to the lower end of the lower elastic tab 30 to guide the finger 14 towards the rear path 7. The behavior of the lower elastic tab 30 with the finger 14 is the same as that of the elastic locking tab 20 with the finger 14 seen above. With reference to figure 6, the sheet 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, substantially inclined, to allow blocking, on the part back of the bottom tongue, the rise of the finger towards the cleft. The bottom tab 30 allows the finger to be directed away from the face in front of the board.

[0066] Furthermore, the compression of the elastic recovery spring is loosened. The finger 14 is then in the rear path 7. With reference to figure 7, the blade 2a is raised so that the finger 14 is located in the groove of the rear path 7. The rear path 7 allows the board to be rolled up.

[0067] Before leaving the locking device during the board ascent, the upper elastic tab 40 is in the finger 14's rising path. The tab 40 is then elastically deformed with the passage of the finger 14 on the rear face 42 .

[0068] Preferably, the locking device B has a transverse retention element 60, where the rail is supported in such a way that it blocks the translation of the locking device with respect to the rail.

[0069] With reference to figure 8, the transverse retention element is a support 60 that extends transversely to the base of the locking device B. The support 60 is intended to be applied on the lower edge of the window or of the door, the rail rests on the bracket to flatten it against the bottom edge.

[0070] The support 60 optionally comprises a holding element 61 which extends vertically and parallel to the distance of the locking device B. Said support rests against the lower edge of the window or door and said support element clamp 61 is inserted into a cavity of the rail so that a wall, of non-zero thickness, of said rail is located between the clamping element 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, the second device comprises a second cursor mounted in translation following an axis substantially perpendicular to the axis of the rail in, even preferably, the lower slat 2a. In this way, the two locking devices participate to re-center said slat with respect to each of the rails.

Claims (16)

1. Roller shutter installation comprising: - a board (1) formed by slats (2, 2a) articulated with each other, whose winding / unwinding around a tree (3) is guaranteed by a drag means (4), the slats (2, 2a) of the board are guided on each side by a rail (5a, 5b), the dash can be unrolled to the bottom of a window or door in the closed position, - at least one dash locking device (B) in a partially open position for which the lower slat (2a) is located at a reduced distance (E) from the lower edge of the window or door, in particular insufficient to allow the passage of a person, said locking device (B) comprises - a frame (6) extending in a direction substantially parallel to the axis of the rail and, - a cursor (14) that extends along an axis substantially orthogonal to the plane of the board, said cursor is mounted in translation following an axis substantially particular to the axis of the rail, in one of the slats (2, 2a) and attached to said slat with an elastic recovery device (17), said frame (6), the face of which faces the slats (2, 2a) of the board comprises three portions covered by said cursor, namely - an upper portion capable of compressing the downward elastic recovery device (17), - an intermediate portion provided with at least one slit (9) that loosens the compression of the elastic recovery device (17) and prevents the cursor (14) from rising, - a lower portion for guiding towards a rear path (7) of the locking device to allow the cursor (14) to rise, characterized in that said upper portion, said intermediate portion and said lower frame portion (6) are respectively elastically deformable, and in that said cursor (14) when applied on one of said frame portions (6), causes the position of the considered portion, the considered portion returns to its initial resting position when application ceases. 2. Installation according to claim 1, characterized in that the intermediate portion comprises at least one slit (9) that forms a fixed stop (8) to stop the cursor (14) during an ascent of the board (1). Installation according to claim 1 or 2, characterized in that the intermediate portion comprises at least one elastic locking tab (20) projecting towards the board, which has a front face (21) and a rear face (22), where the at least one elastic locking tab (20) is conditioned to guide the movement of the cursor (14): - during the descent of the board, along the front face (21) of the locking tongue towards the slit (9), and - during the ascent of the deck, along the rear face (22) towards the slit (9) that forms the stop (8). Installation according to claim 3, characterized in that the slit (9) whose at least one part has a surface substantially parallel to the axis of the rail, is extended by the stop (8) whose surface is oriented downwards and is extended by the face rear (22) of the elastic locking tab. Installation according to one of Claims 1 to 4, characterized in that the intermediate portion comprises several slits (9) and several elastic locking tabs (20) distributed vertically along the intermediate portion. Installation according to one of Claims 1 to 5, characterized in that the lower portion comprises a lower elastic tab (30) located near the lower part of a window or door in the closed position, protruding towards the panel, and having a front face (31) and a rear face (32), said lower tab is conditioned to guide the movement of the cursor: - during the descent of the board, on the front face (31) of the tongue towards a lower end of the locking device, and - during the ascent of the board, on the rear face (32) of the tongue towards the rear path (7) to allow the board to roll up. Installation according to one of claims 3 to 6, characterized in that each elastic locking tab (20) and the bottom elastic tab (30) extend downwards, and: - in a direction that forms a first non-zero angle with respect to a vertical plane when the cursor (14) is not in contact with said tongue (20, 30), and - in a direction substantially parallel to the vertical plane or that forms a second non-zero angle less than the first angle, when the cursor (14) is in contact with said tongue (20, 30), it is bent by the action of the cursor (14 ). Installation according to one of Claims 1 to 7, characterized in that the rear path (7) comprises a slot fitted in the frame (6). Installation according to one of Claims 3 to 8, characterized in that the upper portion of the frame (6) comprises an upper elastic tab (40), at its upper end, protruding in the direction of the rail, and having a front face ( 41) and a rear face (42), said upper tongue is conditioned to guide the movement of the cursor, during the descent of the board, along the front face (41) of the tongue, towards the at least one elastic tongue of lock (20), causing the slider (14) to slide. Installation according to one of claims 3 to 9, characterized in that each tongue (20, 30, 40) has a substantially curvilinear profile and extends along a width of between 5 and 15 mm. 11. Installation according to one of claims 1 to 10, characterized in that the cursor (14) is a finger (14) mounted on a plate (15) in a bead (16) inserted in the lower slat (2a) of the board, the plate (15) can slide in a direction parallel to the length of the slat, and recovers elastically in a rest position, which tends to push the finger (14) towards the outside of the slat, the finger (14) is arranged at a right angle to the plate (15), orthogonal to the plane of the unrolled board. 12. Installation according to one of claims 1 to 11, characterized in that it comprises a second locking device similar to the first, the second device comprises a second cursor mounted in translation following an axis substantially perpendicular to the axis of the rail on the board in which it is mounted the first cursor, the two locking devices participate to re-center said tablet with respect to the rails. 13. Installation according to one of claims 1 to 12, characterized in that the frame (6) is partially or totally housed in the end piece (5a, 5b). 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 rail (5a, 5b) by screwing. 16. Installation according to one of claims 1 to 15, characterized in that the locking device (B) has a transverse retention element (60), on which the rail rests so as to block the translation of the frame (6) with respect to of the rail (5a, 5b).