EP0179682A1 - Inviolable panel shutter for wall openings - Google Patents

Abstract

A laminated panel shutter for wall openings whose box (8) for housing the laminae (5b, 5c, 5d) is equipped with means (9) for converting the longitudinal movement of the laminae outside the box into a transverse movement inside the latter. According to the invention, the laminae carry, along their adjacent contact edges, mutual releasable locking means (30, 32, 35) which, under the stressing of a thrust component (5f) made operational by the passage of the laminae into their joined closing position, are made active and which, as soon as the stressing of the thrust member ceases at the beginning of the movement of the laminae in the direction of the box (8), are released. These locking means may comprise, in each pair of adjacent laminae (5c, 5d), at least one rib (30) formed on the contact edge of one (5d) of the laminae and interacting with a complementary groove (32) made in the edge of the second lamina (5c), and also an elastic member (35, 37) which is stressed by a loading lamina (5f) which is placed at the top of the stack of laminae and is substantially heavier than each of the latter. <IMAGE>

Description

The present invention relates to a panel with blades, in particular for closing wall openings, of the type comprising a number of blades mounted to slide in two parallel guide paths extending on two opposite sides of the frame of the panel. to be able to be moved between a first position in which they are placed in mutual contact between the guide tracks and a second position in which they are stored in a box mounted on a third side of the frame, this box containing means for transform the longitudinal movement of the blades between the guide tracks into a transverse movement inside the box.

Such slat panels are essentially used as shutters for closing window openings or French windows, shutters in which the means for transforming the movement of the slats allow the latter to come side by side inside of the box, the size of which can thus be considerably reduced compared to that of the boxes of conventional roller shutters.

In general, in such shutters, the blades are without any connection between them and the mechanism for controlling their movement simply exerts traction on the lowest blade which therefore pushes all the other blades into the box where they come to be stored. side by side thanks to one or more guide rails curving towards the vertical bottom wall of the box and cooperating with lugs provided on the side edges of the blades.

However, since once in the closed position of closure between their guide paths, the blades, other than the lower blade, are free from any relative movement, the voleta with blades of this type must, in order to be at shelter from attempted break-ins from the outside, have a locking system that prevents any upward movement of the stack of blades without using the control mechanism.

However, this arrangement is not sufficient to confer a character of total inviolability because the slats, especially if they are very long, can be easily forced from the outside by a thrust exerted at their center towards the inside the shutter. If this problem can be easily solved in conventional roller shutters by a partial and possibly temporary joining of the slats to the level of their contact edges, it is not the same in the louvered shutters of the aforementioned type, because in these, as has already been said, the blades are not generally provided with mutual connection permanent and, moreover, after a blade has been introduced into the box, its trajectory must suddenly curve while it is still in contact with the following blade, weighing with all its weight thereon.

The present invention proposes to remedy this drawback and, to do this, it relates to a laminated panel of the type specified in the preamble which is characterized in that the blades carry, along their adjacent contact edges, means releasable mutual locking device comprising at least one movable element which, under the request of a thrust member made operational by the passage of the lamés in their first position, is moved to make the locking means active and which, as soon as the biasing of the thrust member at the start of the movement of the blades from their first to their second positions, is moved in the opposite direction to release the locking means.

In this way, the locking means, which act to secure the lamés mutually in the joined position thereby preventing any attempt to break in from the outside, cease to act as soon as the blades are moved towards the box, so that their change of trajectory inside it can be done without hindrance, just as in conventional louvre panels not fitted with such locking means.

In a first embodiment of the invention, the locking means comprise, in each pair of adjacent blades, at least one rib formed over a part of the length of the contact edge of one of the blades and cooperating with a groove complementary formed in that of the second blade, as well as at least one elastic member forming said movable element, this elastic member being fixed on the contact edge of one or the other of the two blades near the rib or the groove thereof and having a stiffness such that it can be compressed between the contact edges of the two blades under the stress of the pushing member and that it can relax when it ceases.

In this case, the thrust member is constituted by an additional loading blade, disposed at the head of the series of blades considering their direction of movement from the first in the second position, this load blade remaining permanently inside the box and being completely devoid of locking means on its edge of contact with the next blade.

It will be understood that in the case where the louvre panel according to the invention is used as a vertically moving shutter, the loading blade, together with the following blade, strongly presses on the stack of blades in the closed position and thus compresses the elastic members located between them, so that the ribs are fitted into the associated grooves to ensure mutual locking of the blades. On the other hand, during the movement of raising the shutter, the loading blade, devoid of locking means, can be freely pushed, as in a conventional shutter, towards the bottom wall of the box and, as soon as it is released from its contact with the next blade, the elastic members dislodge the ribs from the associated grooves and thus unlock the blades which can therefore be stored side by side in the box. It should be noted here that the fact that the loading blade is devoid of locking means, does not authorize, when the shutter is lowered, any attempted break-in at its level of contact with the next blade since this area is inside the cabinet.

In the case of very wide panels or shutters, it will of course be preferable that, in each pair of adjacent blades, the locking means comprise several ribs formed at equal intervals along the contact edge of one of the blades and several elastic members respectively disposed between these ribs, to ensure the inviolability of the flap over its entire width.

In addition, in a preferred embodiment, each elastic member comprises a spring received in a housing formed in the contact edge of the blade which carries it, as well as a U-shaped pusher element secured to the free end of the spring and coming to cover said contact edge when the spring is compressed. This type of elastic member has both the advantage of exerting an effective thrust between two adjacent blades, when the load blade no longer acts, and of being completely erased otherwise to allow total insertion ribs in the corresponding grooves and thus ensure effective mutual locking of the blades.

Advantageously, in each pair of adjacent blades, the part the contact edge of the second blade intended to bear against the pusher element is capped by an identical U-shaped element, made of the same material as the latter. The purpose of this arrangement is to reduce to a minimum the friction between each blade and the next, during its change of trajectory in the box.

In a second embodiment, the blade panel according to the invention is characterized in that the mutual locking means of the blades consist of at least one series of rods which are respectively carried by all the blades, except for the first to enter the box, so that it can slide in the same plane, these rods being dimensioned and retained against any sliding out of the blades so as to be inside the edges thereof when they are moved from their first to their second positions, with the exception of the rod of the last blade to enter the box, which protrudes from the latter to come into abutment against the thrust member preferably constituted by the support of the panel, as soon as the blades arrive in their first position, in that the rods have, on either side of the contact planes of the blades, ends of complementary shapes, and in that the first blade to penetrate into the box has, s ur its edge of contact with the next blade, an interlocking member placed in the same plane as the rods, the series of rods being possibly associated with a return means, acting in the opposite direction to the direction of movement of the blades of their first to their second positions.

Advantageously, the rods are slidably mounted inside the blades and the interlocking member is constituted by a recess formed in said contact edge of the first blade, the return means being formed by a spring housed in this recess and able to be applied against a shoulder of the stem of the next blade.

As will be easily understood, once the blades are in the closed position between the guide tracks, the rods are in alignment and come to fit one into the other in succession inside the blades under pushing the rod of the last blade into abutment against the support of the panel so as to ensure mutual locking of the blades. On the contrary, when raising the shutter, all the rods are, under the action of the return and / or gravity means, returned to their original position in which they are located inside the contact zones of the blades and, in this way, these are unlocked and can be unimpeded stored in the box.

In general, in the louvre panel according to the invention, the means for transforming the movement of the louvers consist of guide rails which curve towards the bottom of the box and cooperate with lugs carried by the edges of each blade which slides in the guideways, in half of it which first penetrates into the box. However, to guarantee a path change without hindrance of the blades, the invention provides in addition two guide cams which curve towards the bottom of the box and cooperate with second lugs fixed on the edges of each blade provided with the first lugs, close to the contact edge of the latter, which enters the casing last.

Thanks to this additional arrangement, each blade automatically tilts towards the bottom of the box as soon as it has been completely inserted into it and is thus automatically detached from the next.

Finally, in the case where the blades are free from any relative movement when they are in contiguous position between the guide tracks, there is provided, according to another characteristic of the invention, a blocking system capable of ensuring locking, on at least one of the guide paths, of the first blade to enter the box, when the panel is completely out of the latter.

• - la figure 1 est une vue partielle illustrant le fonctionement général de ce volet à lames, représenté entièrement descendu, la paroi latérale du caisson ayant été retirée ;
• - la figure 2 est une vue partielle analogue à la figure 1, mais représentant le volet entièrement remonté ;
• - la figure 3 est une vue en coupe partielle agrandie illustrant le système de blocage du volet en position active ;
• - la figure 4 est une vue en coupe effectuée selon la ligne IV-IV de la figure 3 ;
• - la figure 5 est une vue en coupe qui correspond à la figure 3 mais représente le système de blocage en position inactive ;
• - la figure 6 est une vue en coupe effectuée selon la ligne VI-VI - de la figure 4 ;
• - les figures 7 à 9 illustrent un premier mode de réalisation des moyens de verrouillage des lames conformes à l'invention ; et
• - les figures 10 à 12 illustrent un second mode de réalisation de ces moyens de verrouillage.

Several embodiments of the strip panel object of the present invention, produced in the form of a shutter, will now be described in more detail, but only by way of nonlimiting examples, with reference to the accompanying drawings in which:

• - Figure 1 is a partial view illustrating the general operation of this louvered shutter, shown fully lowered, the side wall of the box having been removed;
• - Figure 2 is a partial view similar to Figure 1, but showing the fully reassembled flap;
• - Figure 3 is an enlarged partial sectional view illustrating the shutter locking system in the active position;
• - Figure 4 is a sectional view taken along the line IV-IV of Figure 3;
• - Figure 5 is a sectional view which corresponds to Figure 3 but shows the locking system in the inactive position;
• - Figure 6 is a sectional view taken along line VI-VI - of Figure 4;
• - Figures 7 to 9 illustrate a first embodiment of the blade locking means according to the invention; and
• - Figures 10 to 12 illustrate a second embodiment of these locking means.

The shutter shown in Figure 1 is intended to close a bay (1 formed in a wall 2 of any construction. Along the inner face of the wall 2, the bay 1 is equipped with a frame 3 for a window 4 .

In a manner known per se, the shutter itself essentially consists of a number of rectangular blades 5, generally made of wood or plastic, each slidably mounted by their small vertical edges 5e, in two parallel vertical slides 6 fixed on either side of the opening, applied to the frame 3 of the window 2. The blades 5 carry, at the same height, on each of their vertical edges 5e, a lug 7 housed in a respective slide 6 and are completely independent of each other, without any link between them. The pins are located at the top of the edges 5e of the blades 5.

From their position shown in Figure 1, positicn in which they are contiguous and close the bay 1, the blades 5 can, under the action of a control mechanism which will be described in more detail below, be moved upwards along the slides 6 so as to be rare in a box 8 arranged at the upper part of the bay 1. Inside: - inside this box 8, the external branch 6a of each of the slides is extended by a guide rail 9 comprising a first vertical section 10 which curves in 11 towards the bottom wall 12 of the box, which is here front wall, in the form of a second section 13 inclined at an n ^g obtuse relative to to the vertical section 10. The two guide rails 9 are parallel over their entire length, and the free space which they delimit 'between them is of a width slightly greater than the length of the blades 5

As can still be seen in Figure 1, the wall of wave 12 of the box 8 extends in a vertical plane on the outside of the b _L e 1 and has a height barely greater than that of the blades. The bottom wall ₁ 4 of the box, in which is formed the insertion slot 15 of the blades located very close to the window 4, is in turn parallel to the inclined sections 13 of the guide rails 9 and is spaced from the latter by a distance of barely greater than that which on each blade 5, separates a lug 7 from the lower end of the latter.

The shutter control mechanism is essentially constituted by a pin 16 fixed between the two side walls of the box 1, in the upper rear corner thereof, just opposite the insertion slot 15. This axis is capable of being rotated, in a manner known per se, by means of an oscillating crank rod 17 accessible from the interior of the construction. In addition, each of the ends of the axis 16 comprises a coil 18 on which is wound an elongated drawing element, here constituted by a nylon tape 19, which extends parallel to the two lateral branches 6a, 6b of the slide respective to attach to a special lug 20 located at the base of the corresponding vertical edge of the blade 1a: lower 5a.

As is known, this control mechanism, by exerting traction on the lowest blade 5a which carries with it all the others upwards, ensures a side-by-side storage in vertical position of the blades 5 in the box 8, in combination with the curved guide rails 9 on which the blades 5 slide by their lugs 7, pushing each other towards the bottom wall 12 of the casing 8. This method of storing the blades illustrated in FIG. 2 makes it possible to reduce the maximum size of the box and give thickness to the blades, in particular to provide them with thermal insulation. To cause the shutter to close, illustrated in FIG. 1, it suffices to initiate the lowering movement of the lowest blade 5a using the control mechanism and therefore all the other blades 5 slide along the rails. guide 9 under the simple effect of gravity, to stack on top of each other in the joined position between the slides 6.

However, in this position, since the blades 5 are free to move relative to one another, it is necessary to provide a locking system, inaccessible from the outside, which can lock the shutter and put it thus safe from attempted break-ins. According to one of its essential characteristics, the component according to the invention is equipped with such a blocking system which will now be described with reference to Figures 3 to 6. '

As these figures show, this locking system consists of an elastic metal strip 21 which has been subjected at 22 to a twist of 90 ° to present, on the one hand, at its base a bearing surface 23 by which it is fixed, by means of screws 24, on one of the vertical edges 5e of the highest blade 5b of the shutter, above the lug 7, and, on the other hand, a high elastic part 25 which, when the flap is fully lowered, faces the inner branch 6b of the corresponding slide 6, being normally biased against the latter. In addition, this elastic part 25 of the strip 21 is folded at a right angle in the direction of the inner branch 6b of the slide, along only part of its upper free edge, so as to define a pawl 26, which in said lowered position of the flap, is placed opposite a light 27 formed in the upper part of the inner branch 6b of the slide 6. It should also be noted that the pulling tape 19 extends between the inner branch 6b of the slide and the elastic part 25 of the strip 21 and more precisely in front of the part without pawl of the free edge of the latter.

• Lorsque le volet est complètement descendu, le ruban 19 est détendu si bien que la lamelle 21 peut librement s'appliquer contre la branche intérieure 6b de la glissière 6, son cliquet 26 s'engageant alors dans la lumière 27 de cette dernière, comme le montrent les figures 3 et 4. De cette façon, la lame la plus haute 5b du volet est verrouillée dans les glissières et interdit ainsi un déplacement vers le haut du volet qui serait commandé de l'extérieur par une poussée exercée sur la lame la plus basse 5a. Il est à noter ici que dans cette position de verrouillage de la lamelle 21, le ruban 19 est simplement plaqué contre la branche intérieure 6b de la glissière en étant sensiblement éloigné de la verticale et ce, sans être enfoncé par le cliquet 26,de sorte qu'il n'est pas sujet à une usure prématurée du fait de son contact avec la lamelle 21.

The blocking system which has just been described operates as follows:

• When the shutter is completely lowered, the strip 19 is relaxed so that the strip 21 can freely apply against the inner branch 6b of the slide 6, its pawl 26 then engaging in the light 27 of the latter, as the show Figures 3 and 4. In this way, the highest blade 5b of the shutter is locked in the slides and thus prevents an upward movement of the shutter which would be controlled from the outside by a thrust exerted on the blade most low 5a. It should be noted here that in this locking position of the strip 21, the strip 19 is simply pressed against the inner branch 6b of the slide while being substantially distant from the vertical, without being pressed in by the pawl 26, so that it is not subject to premature wear due to its contact with the strip 21.

The flap is unlocked automatically when its upward movement is initiated. In fact, when the axis 16 is rotated for this purpose in the proper direction, the ribbon 19 is stretched gradually to return to its vertical position and, by its contact with the strip 21, move it away from the inner branch 6b of the slide 6, so that the pawl 26 is extracted from the light 27, as shown in FIG. then, the highest blade 5b of the shutter is unlocked and if one continues to rotate the axis 16, the shutter is raised as described above. It will be added here that to avoid, during the initiation of the movement for raising the flap, any risk of blocking by contact of the pawl 26 with the upper edge 28 of the slot 27, a slight clearance 29 is provided between the latter and the pawl 26. '

It is of course possible to ensure that the strip 21 exerts its locking action on the outer branch 6a of the slide 6. However, the fact that this locking takes place on the branch 6b located on the inner side of the flap, puts the system to shelter from attempted break-ins from outside the building.

It goes without saying that one can also provide a locking system of the type described above on the two vertical edges 5e of the highest blade 5b of the shutter, but only one is sufficient to ensure effective locking of the latter.

However, this blocking system is not sufficient to give the shutter a character of total inviolability, because in fact the blades, which simply rest on one another in the closed position of the shutter, can be easily forced , especially if they are very long, by a push from the outside towards the inside of the shutter.

The present invention overcomes this drawback by proposing, in combination with the locking system which has just been described, releasable locking means acting along the two contact edges of two adjacent blades of the shutter.

According to a first embodiment shown in FIGS. 7 to 9, respectively from the front in their active position and in section in their active and inactive positions, these locking means comprise, in each pair of adjacent blades 5c, 5d, several ribs 30 formed at equal intervals along the contact edge 31 of the lower blade 5d to cooperate with grooves 32 of complementary shape formed in the contact edge 33 of the upper blade 5c. Between the ribs 30 of the lower blade, there are also arranged elastic members 34. Each of these is formed by a helical spring 35 which bears against the bottom of a cylindrical housing 36 hollowed out in the contact edge 31 and which carries at its free end a pusher element 37, produced in the form of an elongated element in U made of plastic and dimensioned so as to come over the contact edge 31 of the blade 5d between two successive ribs 30, when the spring 35 is fully compressed. It will also be observed that the part of the contact edge 33 of the upper blade located opposite the pusher element 37 is capped by a U-shaped element 38 in all respects identical to the latter.

It will be observed in FIG. 8, that all the edges of mutual contact of the blades are provided with the locking means which have just been described, with the exception of those 39, 40 of the two upper blades 5b and 5f, which are cut on their entire length in bevels of complementary shapes whose inclined contact plane is turned towards the bottom wall of the box 8.

The highest blade 5 _f in fact constitutes an additional load blade, substantially of the same weight as the other blades. This loading blade 5 f is further dimensioned so as to always be inside the box 8 and even well above the insertion slot 15 of the latter so that its contact area with the next blade 5b is inaccessible from the outside.

Figures f and 8 also show that the vertical edges 5e of the blades all carry, near their base and on their outer side, a second lug 41 suitable, during the introduction of each blade into the box 8, to come to the contact of a guide cam 42 curved towards the bottom wall of the box.

The locking means which have just been described act in the following manner.

When the shutter descends, the blades 5 are placed successively between the slides 6. At the end of this movement, the load blade 5f is in contact with the stack of blades 5 located below it and thus compresses the elastic members 34. The springs 35 are then completely sunk into their housing 36 and the pusher elements 37 are erased to allow the ribs 30 to fit into the respective grooves 32 as shown in Figures 7 and 8. Under the effect of the charging blade 5f, the other blades 5 are thus mutually locked along their contact edges 31, 33. Eh combination with the blocking system which acts as described above, these locking means therefore guarantee total inviolability of the flap in lowered position.

On the other hand, at the start of the movement for raising the shutter, the loading blade 5f is moved towards the bottom wall 12 of the box under the thrust of the lower blades, this movement being made possible by the bevelled shape of the contact edges 39 40. The load blade 5f being thus extracted from the stack, the springs 35 are relaxed so that, in each pair of adjacent blades, drive the upper blade 5b upwards via the push elements 37 and thus dislodge the ribs 30 grooves 32 as shown in Figure 9. In this way, the blades 5 are unlocked and, after their introduction into the housing 8, they can therefore be pushed successively unimpeded towards the bottom wall 12 of the latter. This change of trajectory of the blades 5 is obtained thanks to the inclined sections 13 of the guide rails 9 which cooperate with the lugs 7 of the blades, but also thanks to the guide cams 42 which cause the bottom of the blades to tilt when their second lugs 41 come into contact. contact with these guide cams. In addition, this change of trajectory is done smoothly by the fact that, when it occurs, the blades are in contact only by their U-shaped elements 37 and 38, which being made of plastic material reduce friction. It goes without saying that, for this system to function properly, the springs 35 must have a stiffness allowing them at the same time to be completely compressed between the contact edges 31, 33 of the blades 5 under the pressure of the load blade 5f and relax completely when this pressure stops.

Figures 10 to 12 illustrate a second embodiment of the shutter locking means according to the invention, respectively in front view in their active position and in cross section in their active and inactive positions.

According to this second embodiment, the locking means are constituted on each blade 5, with the exception of the upper blade 5b, by several vertical rods 43 mounted to slide freely in the blade and distributed at equal intervals over the entire length of the latter while being positioned respectively in the same vertical planes as the rods 43 of the other blades. Each rod 43, with the exception of those of the lower blade 5a, is of a length very slightly less than the height of the blade which carries it and has a conical upper end 44 and a lower end 45 hollowed out in a complementary form.

The rods 43a of the lower blade 5a have a length greater than the height of the latter and, if they also have a conical upper end 44a, their lower end carries a stopper 46. The rods 43a are also retained against any sliding down inside the blade 5a so that, when the latter is raised, their lower end clearly protrudes from the lower edge 47 of the blade 5a and their upper end 44a is slightly inside the upper edge 48 of the latter. The rods 43 of the upper blades are retained in the same way in the latter, but in such a way that, when the lower blade 5a is raised, they are entirely housed inside their respective blades.

Finally, the upper blade 5b is provided with conical recesses 49 formed in its lower edge 50 at points situated respectively in the vertical planes of the rods 43. In addition, these recesses 49 retain each) a spring 51 capable of coming to apply against there corresponding rod 43 of the next blade 5g.

This second embodiment of the locking means acts as follows.

When the shutter is lowered, the stops 46 of the rods 43a of the lower blade 5a come into contact with the window support 53 and consequently all the rods 43a are pushed upwards, causing identical displacement of the rods 43 of the upper blades, which, in each row then come into mutual interlocking inside the latter, at their ends of complementary shapes 44, 45. In addition, the conical ends 44 of the rods 43 of the blade 5g are housed tightly in the recesses 49 in the upper blade 5b by compressing the springs (see FIG. 11).

Thus, since the upper blade 5b is locked by the blocking system of FIGS. 3 to 6, all the blades are immobilized against any displacement in a vertical plane as well as from the outside towards the inside of the shutter.

The blades are unlocked automatically at the start of the flap up movement. Indeed, as soon as the lower blade 5a is raised, the rods 43, 43a, in mutual interlocking, slide in the blades under the effect of gravity and the thrust of the springs 51 until they are outside the zones of blade contact (see figure 12). After their introduction into the box, they can therefore be pushed unhindered towards the bottom wall 12 of the box 8 in the manner described with reference to the first embodiment. It should be noted here that, to favor the change of trajectory of the blades in the box, one can do without the guide cams 42 and the pins 41, giving the contact edges of the blades the form of complementary bevels.

Claims (13)

1. Louvre panel, in particular for closing wall openings, of the type comprising a certain number of louvers (5) mounted sliding in two parallel guide tracks (6) extending on two opposite sides of the frame of the panel , in order to be able to be moved between a first position in which they are placed in mutual contact between the guide tracks (6) and a second position in which they are stored in a box (8) mounted on a third side of the frame, this box containing means (9) for transforming the longitudinal movement of the blades (5) between the guide tracks (6) into a transverse movement inside the box (8), characterized in that the blades (5) carry , along their adjacent contact edges (31, 33), releasable mutual locking means (30, 32, 34; 43, 43a) comprising at least one movable element (34; 43, 43a) which, under the stress a thrust member (5f; 53) made operational by the passage of the blades (5) in their first position is moved to make the locking means active and which, as soon as the urging member ceases to act upon the movement of the blades from their first to their second positions, is moved in the opposite direction to release the locking means. 2. Blade panel according to claim 1, characterized in that the locking means comprise, in each pair of adjacent blades (5c, 5d), at least one rib (30) formed over part of the length of the contact edge (31) of one of the blades (5d) and cooperating with an additional groove (32) formed in that (33) of the second blade (5c), as well as an elastic member (34) constituting said movable element , this elastic member being fixed on the contact edge (31) of one or other of the two blades close to the rib (30) or the groove (32) thereof and having a stiffness such that 'It can be compressed between the contact edges of the two blades under the stress of the pushing member (5.f) and that it can relax when it stops. 3. Blade panel according to claim 2, characterized in that the thrust member is constituted by an additional load blade (5fr), placed at the head of the series of blades considering their direction of movement from the first to the second positions, this load blade ( _5f ) remaining permanently inside the box (8) being completely devoid of locking means on its ch: nt contact with the next blade (5b). 4. Blade panel according to claim 2 or 3, characterized in that, in each pair of adjacent blades (5c, 5d), the locking means comprise several ribs (30) formed at equal intervals along the contact edge ( 31) of one of the blades (5d) and several elastic members (34) respectively disposed between these ribs (30). 5. Louvre panel according to any one of claims 2 to 4, characterized in that each elastic member (34) comprises a spring (35) received in a housing (36) formed in the contact edge (31) of the blade (5d) which carries it, as well as a U-shaped pusher element (37) integral with the free end of the spring (35) and covering said contact edge (31) when the spring is compressed. 6. Louvre panel according to claim 5, characterized in that the part of the contact edge (33) of the second blade (5c) intended to come into abutment against the pusher element (37) is capped by a U-shaped element identical (38) made of the same material as the latter. . Blade panel according to claim 1, characterized in that the mutual locking means of the blades consist of at least one series of: ges (43, 43a) which are respectively carried by all the blades (5), except of the first (5b) to penetrate into the box (8), so as to be able to slide in the same plane, these rods being dimensioned and retained against any sliding out of the blades so as to be located within the huts thereof when they are moved from their first to their second positions, with the exception of the rod (43a) of the last blade (5a) to enter the box (8), which protrudes from it to come in. abutment against the thrust member (53) preferably constituted by the support of the panel, that the blades (5) arrive in their first position, in that the types (43, 43a) have, on both sides other of the contact planes of the blades of the ends of complementary shapes (44, 45), and in that the first blade (5b) to penetrate into the box has, on its contact edge (5) with the next blade (5g) , an interlocking member (49) placed in the same plane as the rods (43, 43a), the series of rods being possibly associated with a return means (51), acting in the opposite direction to the direction of displacement of the blades (5) from their first to their second positions. 8. Blade panel according to claim 7, characterized in that the rods (43) are mounted to slide freely inside the blades (5) and the interlocking member is constituted by a recess (49) formed in said contact edge (50) of the first blade (5b), the return means being formed by a spring (51) housed in this recess and capable of coming to bear against a shoulder of the rod (43) of the blade next (5g). 9. Blade panel according to claim 7 or 8, characterized in that the thrust member is constituted by the support (53) of the panel, forming the fourth side of the frame of the latter. 10. Blade panel according to any one of claims 1 to 9, in which the means for transforming the movement of the blades (5) consist of guide rails (9) which curve (at 11) towards the bottom (12) of the box (8) and cooperate with lugs (7) carried by the edges (5e) of each blade which slide in the guide tracks (6), 'in the half of it which first penetrates into the box, characterized in that the means for transforming the movement of the blades further comprise two guide cams (42) which curve towards the bottom (12) of the box (8) and cooperate with second lugs (41) fixed on the edges (5th) of each blade provided with the first lugs (7), near the contact edge thereof which penetrates last into the box. - 11. Louvre panel according to any one of claims 1 to 10, characterized in that it comprises a blocking system capable of ensuring locking on at least one of the guide tracks (6), of the first blade (5b) to enter the box (8), when the panel is completely out of the latter. 12. Blade panel according to claim 11, which is equipped with a control mechanism for moving the blades (5) from their first to their second positions, a control mechanism which comprises at least one elongated drawing element (19) fixed by one end to a winding pin (16) mounted inside the box (8) and, by its other end, to the last blade (5a) to enter the box and in which the guide tracks (6 ) consist of slides each having two lateral branches (6a, 6b), characterized in that the blocking system consists of an elastic strip (21) which is fixed to at least one of the edges (5e) carrying the lugs (7) of said first blade (5b), for when the panel is completely out of the box, to be urged to engage, by its own elasticity, in a lumen (27) formed in one of the branches (6b) of the corresponding slide (6), the elongate pulling element (19) extending between this branch (6b) of the slide and the elastic strip (21). 13. Louvre panel according to claim 12, characterized in that the strip (21) carries, on only part of its free edge, a pawl (26), the elongated drawing element (19) being opposite the remaining part of the free edge of the strip (21).

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