FR2754010A1 - LOCK FOR ROLLING SHUTTER, EQUIPPED WITH A ROLLING FREE APRON WINDING AXIS - Google Patents

Abstract

Lock for rolling shutters, equipped with an axis (6) for winding the shutter free in rotation, characterized in that it comprises a set of at least two links (2, 3) articulated together by a slide system (14), and the amplitude of the stroke of which is regulated by an exhaust system formed in particular by a bar (17), articulated at one of the ends (16) of one (2) of the links (2) , 3) and cooperating at the level of the other link (3), each of the free ends of the links (2, 3) being respectively connected to the winding axis (6) of the apron and to the first blade (5) apron.

Description

i The present invention relates to an automatic locking device

for roller shutter apron of which

  the winding axis is not stopped in rotation.

  It is more specifically aimed at an automatic lock which ensures both the blocking of the apron when it is in the low position - blades fitted into each other - and the impossibility of raising it by any external action (attempted break-in) , when the deck rotation is not carried out by the

maneuver.

  In the case of the strap operation, the shaft remains free to rotate, in particular in the direction of raising the deck, because the strap wound on the pulley stops the winding axis of the deck only in the direction of the

  lowering the apron, using the brake system.

  In the case of the winch maneuver having a declutching system at the end of the lower stroke, the winding axis of the apron remains still free to rotate in the direction of raising the apron, the declutching mechanism system simply avoiding the winding at

the back of the apron.

  In the case of winch maneuvering systems driven by an electric motor possibly equipped with a freewheel mechanism which avoids not developing any force in the direction of the descent of the deck for obvious safety reasons, this mechanism leaving free in rotation the winding axis in the direction of

raising the deck.

  Known devices such as in particular that referred to in French Patent No. 2,720,100, automatically locks the deck behind the scenes, but these systems all operate with winding shafts locked in rotation by the operation, when the deck blades are in position

low.

  The present invention therefore aims to overcome these drawbacks by proposing a device which offers a rotation blocking of the winding axis when the deck is completely unwound independently of the

  maneuvering system, while guaranteeing self-

  adjustment of the lock according to the chosen dimensions

for roller shutter boxes.

  To this end, the roller shutter lock, equipped with a winding axis of the free-rotating apron according to the invention, is characterized in that it comprises a set of at least two links hinged together by a system slide, and the amplitude of the stroke is regulated by an exhaust system formed in particular by a bar articulated at one end of one of the links and cooperating at the level of the other link, each of the ends free of the links being respectively connected to the winding axis of the deck

and to the first blade of the deck.

  Other features and advantages of this

  invention will emerge from the description given below,

  with reference to the accompanying drawings which illustrate an exemplary embodiment thereof without any limiting character. In the figures: - Figure 1 is a sectional view, in side elevation, illustrating the latch mechanism fully wound on the winding axis of the tube; - Figure 2 is a sectional view, in side elevation, illustrating the kinematics of the latch mechanism during the descent of the deck; - Figure 3 is a sectional view, in side elevation, illustrating the kinematics of the latch mechanism when the deck is in the low position; - Figure 4 is a perspective view of the mechanism

forming lock.

  According to a preferred embodiment, the device forming a lock according to the invention mainly comprises a series of links 1, 2, 3, 4, connecting the axis 6 of rotation of the roller shutter deck to one of the blades 5

forming this apron.

  Thus, a first link 1 is connected to the axis 6 of the deck. This link 1 extends in the form of a plate

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  of curvilinear cross section, preferably made of a plastic or metallic material, in order to adapt as closely as possible to the curvature of

the tubular axis 6.

  According to a second embodiment (not shown in the figures), the first link 1 is replaced by a lug which projects relative to the axis 6 of the deck and which, like the first link 1, connects with a

second link 2.

  The second link 2 which is connected to the other free end 8 of the first link 1 or of the tab, in particular by means of a pin 9 or a rod, is articulated around this axis 9 connecting the two links 1, 2. The angular movement of the second link 2 relative to the first link 1 is limited in amplitude by a stop 10 made at the level of the articulation axis 9

of the two links 1, 2.

  When the second link 2 abuts against the first link 1, it provides a rigid connection capable of

transmit a torque or a force.

  According to an advantageous characteristic, the second link 2, made of plastic or metallic material, is in the form of a substantially curvilinear profile element and comprises, on the one hand a central recess 11 and on the other hand, on its walls lateral 12, 13, an oblong orifice 14. The lights 14 thus produced and the central recess 11 allow the articulation and the guiding in translation of a third link 3. The latter 3 cooperates with the previous 2 by means of a pin 15 projecting and which travels at through

lights 14.

  According to another advantageous characteristic of the invention, the second link 2 has at its other free end 16 (that which is not linked to the first link), a bar 17 articulated around an axis 18 secured to the end of the second link 2. This bar 17 in its oscillating movement, provides an escape mechanism with respect to inclined walls

  19 formed on one of the faces 20 of the third link 3.

  The angular movement of movement of the bar 17 relative to its articulation axis 18, is limited by a stop system practiced at the end of the second

link 2.

  According to another advantageous characteristic of the invention, the third link 3, made of plastic or metallic material, is also in the form of a curvilinear profile element; it has on its external face 20 a plurality of raised zones

  forming notches 19 in the manner of a ratchet wheel.

  The notches 19 thus formed trap the bar 17

  and offer depending on the angular deflection thereof

  ci and the position of the third link 3 relative to the second link 2, a plurality of adjustment positions

and blocking.

  The third link 3 is made integral by means notably of a pin 21 to a fourth link 4 connected in turn to the first blade 5 of the deck which travels through the tulip 22 secured

  of the sliding shutter frame slide.

  Depending on the dimensions of the box to receive the roller shutter curtain, the lock device according to the invention will be modified, by removing the fourth link 4 or by adding a second link 4, in order to

to lengthen the system.

  According to another advantageous characteristic of the invention, the bar 17 rotates about its articulation axis 18 on the second link 2 so as to be able to fall back on the third link 3, during the winding of the deck. To this end, it has at one of its ends a tab 23 which allows

  retract the bar 17 during winding.

  According to yet another advantageous characteristic of the invention, there is at the articulation 9 connecting the first link 1 and the second link 2 an elastic member 24 of the spring type, so as to pivot the second link 2 against this first link 1 and thus allow the sliding of the third link 3 within the oblong slides 14 made in the second link, this movement being perpetuated until the bar 17 comes into contact with a notch 19 practiced in

surface of the third link 3.

  The operating mode of the device that is the subject of the invention, forming a lock between the roller shutter deck and the axis of rotation of the deck is as follows: A rigid connection is made between the tube and the first strip of the deck thanks to the set of links 1, 2, 3, 4, which come into positive abutment against each other, in order to form a rigid assembly in position

unwound from the tube.

  The movement of all the links is broken down as follows: the first link 1 remains integral with the winding tube, the second link is articulated around its axis 9 until it comes

  in abutment against the first link 1.

  The fourth link 4, which can optionally be removed depending on the configuration chosen, is coupled to the first blade 5 of the deck. This fourth link 4 revolves around an axis 21 until it comes

  in abutment against the third link 3.

  The second link 2 has on each side an oblong slot 14, in order to allow the movement of the hinge pin 15 of the third link 3 relative to the second link 2. This movement takes place when the deck is completely lowered behind the scenes and until the tube has finished its rotation, when it

final locking position.

  It is during this period that the

  length adjustment of the lock mechanism. The articulated bar 17 engages in one of the notches 19 provided on the surface 20 of the third link 3, in order to immobilize the latter 3 relative to the second link 2 and produce the desired rigid connection between the winding tube

  of the apron and the first blade of the apron.

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  According to another advantageous characteristic of the invention, provision is made to have at the end of the axis supporting the winding tube of the deck 6, an elastic member in particular of the flat helical spring type, in order to create a slight torque which is necessary for the rotation of the tube in the direction of descent; this assembly is particularly used in the case of a strap operation. This elastic member guarantees that the bar 17 is engaged on one of the notches 19 made on the face 20

of the third link 3.

  The invention as described above offers multiple advantages: it reconciles all the parameters of

  operation (the optimal height of the deck, the arch-

  latching), this maneuver being able to be defined in the workshop and refined on site, by adding at one end of the two main links forming a lock, additional links, in order to adapt to the size of the shutter box rolling, whatever the type of operating device and particularly those which allow the deck's winding axis to rotate freely, the final adjustment on site is carried out automatically thanks to the lights made in one of the links of the lock which allows self-adjustment in

length of the mechanism.

  It remains to be understood that the present invention is not limited to the exemplary embodiments described and shown above, but that it encompasses all variants thereof.

Claims (6)

  1 - Lock for rolling shutter, equipped with an axis (6) for winding the apron free to rotate, characterized in that it comprises a set of at least two links (2, 3) hinged together by a system slide (14), and the amplitude of the stroke is regulated by an exhaust system, formed in particular by a bar (17), articulated at one of the ends (16) of one (2) of links (2, 3) and cooperating at the level of the other link (3), each of the free ends of the links (2, 3) being respectively connected to the winding axis (6)   of the deck and to the first blade (5) of the deck.   2 - Lock for rolling shutter according to claim 1, characterized in that the second link (2), made of plastic or metallic material, is in the form of a substantially curvilinear profile element and comprises, on the one hand a central recess (11) and on the other hand, on its side walls (12, 13), lights (14).   3 - Lock for rolling shutter according to one of the   claims 1 or 2, characterized in that the bar   (17) in its oscillating movement, realizes an escape mechanism with respect to inclined walls (19)   formed on one of the faces (20) of the third link (3).   4 - Lock for rolling shutter according to claim 3, characterized in that the notches (19) thus formed trap the bar (17) and offer depending on the angular displacement thereof and the position of the third link (3) by relative to the second link (2),   a plurality of adjustment and locking positions.   - Lock for roller shutter according to any one   of the preceding claims, characterized in that the   bar (17) rotates around a hinge pin (18) on the second link (2), so that it can be folded over the third link (3) when winding the deck.   6 - Lock for rolling shutter according to any one   of the preceding claims, characterized in that the   bar (17) has at one of its ends, a tab (23) which allows it to be retracted during winding. 7 - Roller shutter lock according to any one   of the preceding claims, characterized in that   has, at the articulation (9) connecting the first link (1) and the second link (2), an elastic member (24) of the spring type, so as to pivot   the second link (2) against this first link (1).   8 - Roller shutter lock according to any one   of the preceding claims, characterized in that   provides for having at the end of the axis supporting the winding tube of the deck (6), an elastic member   in particular of the flat helical spring type.