EP0768445A1 - Rolling closure device with fixed shaft and counterbalance spring - Google Patents

Rolling closure device with fixed shaft and counterbalance spring Download PDF

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Publication number
EP0768445A1
EP0768445A1 EP96440081A EP96440081A EP0768445A1 EP 0768445 A1 EP0768445 A1 EP 0768445A1 EP 96440081 A EP96440081 A EP 96440081A EP 96440081 A EP96440081 A EP 96440081A EP 0768445 A1 EP0768445 A1 EP 0768445A1
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EP
European Patent Office
Prior art keywords
coil
hub
spring
fixed
pawl
Prior art date
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Granted
Application number
EP96440081A
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German (de)
French (fr)
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EP0768445B1 (en
Inventor
Gérard Tournier
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TOURNIER, GERARD
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B9/174—Bearings specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/60—Spring drums operated only by closure members
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping

Definitions

  • the present invention relates to a winding closure device comprising a curtain composed of juxtaposed blades, a fixed axis whose ends are mounted in a fixed frame, at least one coil provided with at least one spiral balancing spring, the outer end is integrally coupled to said coil, this coil being mounted on the fixed axis and being integral with at least one upper blade of said curtain around which it is wound, this closing device comprising a mechanical locking device arranged for stop the curtain falling in the event of a break in the balancing spring or in the fixing of this spring.
  • the invention relates more particularly to the rolling metal curtains of garages, storefronts, industrial or other buildings, the rolling grilles of shop windows or other premises, the blinds, the flexible doors and all other similar closures with rolling up above a bay.
  • curtains, blinds, grilles or other rolling closure devices are traditionally balanced by one or more coil springs of the barrel spring type.
  • These springs consist of a metal blade of rectangular section wound flat in a spiral. After being wrapped around an axis, this blade is placed in a metal box called coil, drum, barrel, pie chart or spring box.
  • spiral springs have the function of restoring the energy stored in the form of a couple thanks to an angular deformation of several turns. The energy thus stored during the descent of the closing curtain is returned when it is opened.
  • Centrifugal type fall arrest systems which are capable of detecting an overspeed of the curtain, but incapable of detecting the rupture of a single spring. These devices are used on generally motorized closings with rotating central axes.
  • Belgian patent BE-A-388 602 describes another safety device intended for a roller shutter and consisting of a ratchet brake arranged to slow down the descent of the shutter and prevent it from falling in the event of a break in the shutter control. This device is subjected to friction when the shutter is lowered and can only be used for low loads.
  • the invention relates to a closing device provided with a safety device, called a mechanical locking device, which is designed, in the event of rupture or anomaly of at least one balancing spring of the curtain of the closing, to ensure the almost immediate stop of the curtain falling movement.
  • a safety device called a mechanical locking device
  • This locking device object of the invention, is intended to equip the various closings mentioned in the preamble, at the time of their manufacture, as well as to equip existing closings in situ, as part of the upgrades required by orders and decrees cited above.
  • a closing device as defined in the preamble and characterized in that the locking device is placed between the fixed axis and the balancing spring, the inner end of the spring being integral with this locking device. , which is arranged to positively couple the coil to the fixed axis, in the event of breakage of the balancing spring, after an angular displacement ⁇ defined between the locking device and the fixed axis, this displacement being controlled by an element of reminder mounted between said locking device and said fixed axis.
  • the basic principle of the invention therefore consists in creating a backlash or offset in rotation by an angle ⁇ , so as to allow the displacement of the locking device relative to the fixed axis during the tensioning of the spring d 'balancing.
  • This rotational movement is used in the event of a break or a failure in the balancing, for example in the event of said spring breaking.
  • This movement obtained thanks to a return element, makes it possible to actuate the locking device in order to block in rotation of the curtain drive coil with respect to the fixed central axis so as to immobilize the assembly.
  • This movement can also be used to trigger an electrical contact in order to stop a possible motorization.
  • the locking device is provided outside the coil and comprises a cylindrical sheath coaxial with the fixed axis and arranged to be able to move relative to said axis over a defined angular sector and substantially equal to the angle ⁇ , this sheath being arranged to carry the coil, the inner end of the spiral spring being integral with the sheath, said sheath carrying a movable blocking element arranged to cooperate with a stop device integral with said coil.
  • the locking device comprises a drive element for said blocking element, this drive element being fixed to a connecting piece integral with said fixed axis, said connecting piece being coupled to the sheath by said element reminder.
  • the movable blocking element is carried by a disc integral with said sleeve, the blocking element and the disc overlapping at least partially and communicating with said drive element through openings respectively formed in the locking element and the disc.
  • the opening provided in the disc has the shape of an arc of a circle centered on the fixed axis and extends over an angular sector substantially equal to said angle ⁇ in which said drive element moves, driving with it the blocking element between two stable angular positions, a passive position in which the blocking element is not engaged with the stop device and authorizes the rotation of the coil and the driving of the curtain of the closure, and an active position in which the locking element is engaged with the stop device and immobilizes the coil and said curtain.
  • the blocking element advantageously comprises a pawl, but may comprise any other suitable part and the stop device comprises a ratchet wheel, but may also comprise any other suitable part.
  • the return element comprises a spring eccentric with respect to said drive finger and the ends of which are connected to the disc and to the connecting piece, this spring being arranged to balance said passive position in normal operation and to activate said active position in the event of an anomaly.
  • the locking device is provided inside the coil and comprises a central hub partially surrounding the fixed axis, this hub consisting of two parts, a first fixed part called the fixed hub secured to the fixed axis and a second movable part called a movable hub secured to the inner end of the balancing spring, the movable hub being arranged so as to be able to move relative to the fixed hub by an angular sector substantially equal to the angle ⁇ , one of the hubs carrying a movable blocking element arranged to cooperate with a stop device secured to the coil.
  • the movable blocking element consists of a pawl mounted pivoting about an axis A on a side of the fixed hub, the axis A being parallel to the fixed axis, this pawl being arranged to extend beyond the fixed hub, the front of the pawl being intended to cooperate with the reel stop device and the rear of the pawl being coupled to the return element.
  • the locking device comprises a pawl retaining finger, this retaining finger being provided on the movable hub and arranged to engage in a corresponding housing provided in the front part of the pawl, the rear part of the pawl being coupled to the movable hub by said return element.
  • the movable hub is advantageously separated from the fixed hub by an angular play substantially equal to the angle ⁇ defining two stable positions of the movable hub, a passive position in which the pawl is held by the retaining finger, allowing the coil to rotate and the movement of the curtain, and an active position in which the pawl is released from the retaining finger, is pivoted by the return element and engages in the reel stop device, immobilizing the reel and the curtain.
  • the fixed and mobile hubs have on their opposite faces complementary shapes arranged to guide the movable hub in rotation relative to the fixed hub.
  • the reel stop device is advantageously constituted by the casing of this reel, which comprises two parallel side walls assembled by transverse bars distributed at the periphery of the reel and arranged to serve as a stop for stop for the ratchet.
  • the return element may comprise a spring eccentric with respect to the retaining finger and the ends of which are connected to the movable hub and to the rear part of the pawl, this spring being arranged to equihibit said passive position in normal operation and to activate said position active in the event of an anomaly.
  • the roll-up closure device may include an unlocking device provided on at least one of the ends of the fixed axis and arranged to allow the manual rolling of the curtain after actuation of the locking device.
  • the unlocking device comprises at least one sleeve of non-circular section, mounted at the end of the fixed axis and at least one support mounted in the standing frame, this support comprising two housings placed side by side, open upwards and communicating with each other, a first housing of section complementary to that of the sleeve corresponding to the normal position of the fixed axis in operation, and a second housing of circular section corresponding to the unlocked position of the fixed axis.
  • This unlocking device can be completed by a member for closing said housings, this member being removable and arranged to allow complete release of the fixed axis.
  • the winding closure device 10 has a fixed central axis 1 on which are mounted at least two coils 2, only one of which is shown.
  • Each coil 2 is provided with a spiral balancing spring.
  • the closing device 10 comprises a curtain 4 composed of blades 5 juxtaposed and winding around the coils 2.
  • the curtain 4 is coupled integrally to the coils 2 by at least its upper blade using bolts, welding or any other appropriate means.
  • the fixed axis 1 is mounted at its two ends 1 ′ in a dormant frame 6 so as to be locked in rotation.
  • the number of coils 2 distributed on the fixed axis 1 is a function of the weight and dimensions of the curtain 4 of the closure.
  • Each coil 2 is equipped with a locking device 50. For reasons of clarity, the figures and the corresponding description take account of only a single coil and a single locking device.
  • FIGS 2 to 5 illustrate a first embodiment of the locking device 20 of the invention, provided outside the coil 2. It comprises a sheath 21 coaxial with the fixed axis 1 on which is mounted the coil 2 This sheath 21 is in the form of a tubular part made in one or two parts to facilitate assembly. It is equipped with a star 22 to fix the inner end of the balancing spring 3, the outer end of the spring 3 being fixed on the inner face of the coil 2 by a screw or a star 23.
  • a set of through holes 24 is provided on the coil 2, the fixed axis 1 and the sleeve 21 so as to overlap. This set of holes makes it possible to immobilize the three elements in rotation using a movable pin not shown in order to allow the pretensioning of the spring 3 in the factory.
  • the coil 2 can be equipped with ball or needle bearings (not shown) on the two bearings in rotation on the sleeve 21, this in order to avoid premature wear of the bearings and to facilitate the opening and closing operations of said curtain 4.
  • the sleeve 21 is provided at one end with a slot 25 which extends over an angle ⁇ and receives a pin or a bolt 26, said pin being integral with the fixed axis 1.
  • the diameter of the slot 25 is slightly greater to the diameter of the pin 26 so as to allow easy rotation of the sleeve 21 on the fixed axis 1.
  • the other end of the sheath 21 is equipped with a disc 27 made integral with the sheath by welds or by any other suitable fixing means.
  • the disc 27 is provided with at least one hole 28 for fixing at least one pawl 30 by a screw 29 and has on its periphery two stops 31 intended to serve as a stop for the pawl 30 in the active position (FIG. 5) .
  • a window 32 in the form of a circular arc centered on the fixed axis 1, is provided in the disc 27 in order to allow the passage of a drive finger 33 which serves to actuate the pawl 30 through a window 30 'depending on the state of the balancing spring 3.
  • One or more fixing points 34 of a return spring 35 can also be arranged on said disc 27 in the form of an axis, a screw or any other suitable means.
  • a sleeve 36 is made integral with the fixed axis 1 by means of a pin 37, a bolt or any other suitable fixing means.
  • This sleeve 36 is integral with a connecting piece 38 fixed by welding or by another similar means.
  • the connecting piece 38 is equipped with the drive finger 33 intended to actuate the pawl 30.
  • Two holes 39 are provided in the connecting piece 38 to allow the fixing of the return spring 35 according to the left or right arrangement.
  • One or more return springs 35 are in permanent tension between the connecting piece 38 secured to the fixed axis 1 and the disc 27 secured to the inner end of the balancing spring 3 and supporting the pawl 30.
  • a ratchet wheel 40 is made integral with the reel 2 using bolts 41, rivets, welds or any other suitable means. It is preferably designed in two identical half-pieces so that it can be mounted on the coil 2 without dismantling the fixed axle 1.
  • This ratchet wheel 40 is provided with notches 42, teeth, notches, holes or other roughness around its periphery so as to present stops when the pawl 30 is actively positioned, in order to allow rapid and effective immobilization of the coil 2.
  • a microswitch or limit switch 42 can be provided on the disc 27.
  • the microswitch can be actuated by the pawl 30 or by any other moving part. It is used to provide electrical information intended for a possible motorization of the closure in order to stop any movement in the event of failure of the balancing system or of an accidental actuation of the locking device.
  • the pawl 30 may have different shapes depending on the types of spring 35, drive finger 33, ratchet wheel 40 or according to the desired operation.
  • the triggering of this pawl 30 can also be caused by different systems under the action of the displacement of the sheath 21 relative to the fixed axis 1.
  • the conventional balancing system of the winding closure devices is modified by the fact that the coil 2 containing the spiral balancing spring 3 is not mounted directly on the fixed axis 1 but on a workpiece intermediate here called sheath 21.
  • the clamp 22 normally attached to the fixed axis 1 is here secured to the sheath 21 so as to allow the free rotation of the sheath 21 on the fixed axis 1.
  • the balancing spring 3 is therefore in tension relative to the sleeve 21 and no longer relative to the fixed axis 1 as on the closing devices not equipped with a locking device.
  • the blades 5 of the curtain 4 are fixed to the coils 2 in a traditional way.
  • the spiral balancing spring 3 stores energy symbolized by the force R which is then restored during the raising of the curtain 4.
  • the tensioning of the spiral spring 3 also has the effect of causing the rotation of the sleeve 21 relative to the fixed axis 1. This rotation extends over the angle ⁇ controlled by the travel of the pin 26 in the slot 25 provided in the sleeve 21.
  • the rotation of said sheath 21 causes the rotation of the disc 27 and the tensioning of the return spring 35.
  • the rotation of the disc 27 generates, by means of the fixed drive finger 33, the release of the pawl 30 from the notches 42 of the ratchet wheel 40, thus allowing the free rotation of the reel 2 relative to the fixed axis 1 and thereby authorizing the use of the closing device 10.
  • the movement of the pawl 30 also re-establishes the electrical contact of the microswitch 42 and thus allows the use of the possible motorization of the closure which controls the rotation of the coils 2.
  • the drive finger 33 provided on the part 38 integral with the fixed axis 1 changes position in the opening 32 provided for this purpose.
  • This movement causes the pawl 30 which is housed in one of the notches 42 of the ratchet wheel 40 thus causing the almost immediate stop of the coil 2 and the fall of the curtain 4 of the closure.
  • the active position of the pawl 30 is shown in dotted lines in FIG. 5.
  • the stroke of the pawl 30 is controlled by the stop 31.
  • the movement of the pawl 30 also causes the motorization to stop immediately via the electric microswitch 42.
  • FIGS 6 to 9 illustrate a second embodiment of the locking device 50 of the invention, provided inside the coil 2. It has a central hub 51 coaxial with the fixed axis 1 and partially surrounding it.
  • This hub 51 consists of two parts, a first fixed 52 called a fixed hub and a second mobile 53 called a mobile hub.
  • the fixed hub 52 is integrally coupled to the fixed axis 1 by at least one screw 54 or by any other suitable means. It is formed by a cylindrical sector extending over an angle less than 90 °.
  • the movable hub 53 is free to rotate on the fixed axis 1 and is formed of a cylindrical sector extending over an angle greater than 180 ° so as to be held around said axis 1.
  • the two hubs 52, 53 are separated an angular clearance equal to an angle ⁇ defined by the angular sector which remains free over 360 °.
  • the hubs 52, 53 have on their opposite faces complementary shapes arranged to guide the movable hub 53 relative to the fixed hub 52.
  • the complementary shapes illustrated in FIG. 9 include a groove 52 'on the fixed hub 52 and a rail 53 'on the movable hub 53, but are not limiting.
  • the coil 2 can be fitted with ball or needle bearings (not shown) on the two bearings in rotation on the fixed axis 1, this in order to avoid premature wear of the bearings and to facilitate the opening and closing operations. closing the curtain 4.
  • This coil 2 is formed of a housing made up of two parallel lateral walls 7 connected by bars 8 distributed on the external perimeter of this coil.
  • the inner end of the balancing spring 3 is fixed to the movable hub 53 by at least one star 55 or by any other suitable means, the outer end of the spring 3 being fixed on one of the bars 8 to the hub of a star 9 , a screw or any other means of attachment.
  • the fixed hub 52 carries on one of its flanks a pawl 60 pivoting about an axis A defined by a fixing screw 61 parallel to the fixed axis 1.
  • This pawl 60 consists of a sheet in the shape of a crescent moon extending beyond the fixed hub 52, by a front part intended to cooperate with the reel stop device 2 and by a rear part coupled to a return spring 65.
  • the movable hub 53 carries on one of its flanks a retaining finger 63 in the form of a wedge and arranged to engage in a corresponding housing 64 provided in the front part of the pawl 60. This retaining finger 63 maintains the pawl 60 in position passive.
  • the movable hub 53 is coupled to one end of the return spring 65 in a fixing hole 66, the other end being fixed in a corresponding hole 67 provided in the rear part of the pawl 60.
  • the movable hub 53 carries two ears 68 parallel in extension of its sides and arranged to guide the balancing spring 3, in particular in the event of rupture to isolate it from the locking device 50.
  • the fixing hole 66 is provided in the corresponding ear 68.
  • the reel 2 stop device is constituted by the casing of this reel 2 and in particular by the transverse bars 8, which makes it possible to considerably simplify the whole of the locking device, thereby reducing costs.
  • the conventional balancing system of the winding closure devices is modified by the fact that the coil 2 containing the spring balancing spiral 3 is equipped with the locking device 50.
  • the clamp 55 normally secured to the fixed axis 1 is here secured to the movable hub 53 so as to allow the free rotation of this hub on the fixed axis 1.
  • the balancing spring 3 is therefore under tension with respect to the movable hub 53 and no longer with respect to the fixed axis 1 as before.
  • the blades 5 of the curtain 4 are as in the previous case fixed on the coils 2 in a traditional manner.
  • the spiral balancing spring 3 stores energy symbolized by the force R which is then restored during the raising of the curtain 4.
  • the tensioning of the spiral spring 3 also has the effect of causing the rotation of the movable hub 53 relative to the fixed axis 1. This rotation extends over the angle ⁇ controlled by the angular clearance existing between the movable hub 53 and the fixed hub 52.
  • the rotation of the movable hub 53 causes the return spring 65 to be tensioned and generates, by the introduction of the retaining finger 63 in the housing 64, the release of the pawl 60 from the bar 8, thus allowing the free rotation of the coil 2 relative to the fixed axis 1 and thereby authorizing the use of the closing device 10.
  • the retaining finger 63 secured to the movable hub 53 emerges from the housing 64 releasing the pawl 60 which, under the effect of the return spring 65, pivots and is housed between two bars 8 of the coil 2, thus causing the stop almost immediate reel 2 and the fall of the curtain 4 of the closure.
  • the stroke of the pawl 60 is controlled by its rear part which abuts against the fixed axis 1.
  • Figures 10 and 11 illustrate an unlocking device 70 provided at at least one end of the fixed axis 1 and arranged to allow intervention on the closure device 10 after incident. Indeed, after actuation of the locking device 20 or 50, it is impossible to unwind the curtain 4 since the coils 3 are locked in rotation. This unlocking device 70 makes it possible to authorize the unwinding of the curtain 4 despite this blocking.
  • This support 72 comprises two housings 73, 74 placed side by side, open upwards and communicating with each other.
  • the first housing 73 has a non-circular section complementary to that of the sleeve 71 and corresponds to the normal operating position of the fixed axis 1. Because the sections are not circular, this axis 1 is blocked in rotation.
  • the second housing 74 preferably located in front of the first, has a circular section and corresponds to the unlocked position of the fixed axis 1. If the fixed axis 1 is placed in this second housing 74, the sleeve 71 can rotate and it it is then possible to unroll the curtain 4 by rotating the axis 1.
  • This unlocking device 70 also comprises a member 75 for closing the housings 73, 74, located above them and removable in order to be able to completely remove the fixed axis 1 from the support 72.
  • the locking device can be adapted to any type of roll-up closure, such as, for example, roller shutters.
  • the spiral balancing spring is replaced by a torsion spring arranged between the fixed axis and the shutter winding tube.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Vending Machines For Individual Products (AREA)
  • Lock And Its Accessories (AREA)
  • Support Devices For Sliding Doors (AREA)

Abstract

The roller door or grille is designed to roll up round a shaft (1) set horizontally above the doorway when raised. It is equipped with a balancing spring to take the weight of the door/grille. A safety mechanism prevents it from falling in the event of the balancing spring breaking. The safety mechanism is positioned between the shaft and the balancing spring. A spring-loaded catch (60) flies outwards if the balancing spring breaks, engaging with a horizontal member of the door/grille and preventing it from dropping suddenly. The catch is held in its passive position by a retaining peg (63) on a moving hub (53). It is also connected to the hub by a spring (65). In the event of the balancing spring breaking the hub, it is moved by the spring (65), releasing the catch so that it instantly stops the door/grille.

Description

La présente invention concerne un dispositif de fermeture à enroulement comportant un rideau composé de lames juxtaposées, un axe fixe dont les extrémités sont montées dans un bâti dormant, au moins une bobine pourvue d'au moins un ressort d'équilibrage à spirale dont l'extrémité extérieure est couplée solidairement à ladite bobine, cette bobine étant montée sur l'axe fixe et étant solidaire d'au moins une lame supérieure dudit rideau autour de laquelle il s'enroule, ce dispositif de fermeture comportant un dispositif de verrouillage mécanique agencé pour arrêter la chute du rideau en cas de rupture du ressort d'équilibrage ou de la fixation de ce ressort.The present invention relates to a winding closure device comprising a curtain composed of juxtaposed blades, a fixed axis whose ends are mounted in a fixed frame, at least one coil provided with at least one spiral balancing spring, the outer end is integrally coupled to said coil, this coil being mounted on the fixed axis and being integral with at least one upper blade of said curtain around which it is wound, this closing device comprising a mechanical locking device arranged for stop the curtain falling in the event of a break in the balancing spring or in the fixing of this spring.

L'invention concerne plus particulièrement les rideaux métalliques à enroulement de garages, devantures de magasins, bâtiments industriels ou autres, les grilles à enroulement de vitrines de magasin ou autres locaux, les stores, les portes souples et toutes autres fermetures similaires à enroulement au-dessus d'une baie.The invention relates more particularly to the rolling metal curtains of garages, storefronts, industrial or other buildings, the rolling grilles of shop windows or other premises, the blinds, the flexible doors and all other similar closures with rolling up above a bay.

Les rideaux, stores, grilles ou autres dispositifs de fermeture à enroulement sont traditionnellement équilibrés par un ou plusieurs ressorts à spirale du type ressort à barillet. Ces ressorts sont constitués d'une lame de métal de section rectangulaire enroulée à plat en spirale. Après avoir été enroulée autour d'un axe, cette lame est placée dans une boîte métallique appelée bobine, tambour, barillet, camembert ou boîte à ressort.Curtains, blinds, grilles or other rolling closure devices are traditionally balanced by one or more coil springs of the barrel spring type. These springs consist of a metal blade of rectangular section wound flat in a spiral. After being wrapped around an axis, this blade is placed in a metal box called coil, drum, barrel, pie chart or spring box.

Ces ressorts à spirale ont pour fonction de restituer l'énergie emmagasinée sous la forme d'un couple grâce à une déformation angulaire de plusieurs tours. L'énergie ainsi emmagasinée pendant la descente du rideau de la fermeture est restituée lors de son ouverture.These spiral springs have the function of restoring the energy stored in the form of a couple thanks to an angular deformation of several turns. The energy thus stored during the descent of the closing curtain is returned when it is opened.

Ces fermetures ne sont généralement pas protégées en cas de défaut, de choc ou d'usure du système d'équilibrage, par exemple en cas de rupture du ressort à spirale, ce qui les rend de ce fait dangereuses pour l'utilisateur. La rupture du ressort à spirale peut provoquer la chute rapide du rideau représentant une masse pouvant atteindre plusieurs dizaines et même plusieurs centaines de kilogrammes, cette masse étant située au-dessus de l'utilisateur ou du public dans le cas d'une grille de devanture d'un magasin par exemple.These closings are generally not protected in the event of a fault, impact or wear of the balancing system, for example in the event of a rupture of the spiral spring, which therefore makes them dangerous for the user. The rupture of the spiral spring can cause the curtain to drop rapidly, representing a mass of up to several tens and even several hundred kilograms, this mass being located above the user or the public in the case of a storefront grille for example.

On connaît des systèmes "antichute" de type centrifuge capables de détecter une survitesse du rideau, mais incapables de détecter la rupture d'un seul ressort. Ces dispositifs sont utilisés sur des fermetures généralement motorisées à axes centraux tournants.Centrifugal type fall arrest systems are known which are capable of detecting an overspeed of the curtain, but incapable of detecting the rupture of a single spring. These devices are used on generally motorized closings with rotating central axes.

On connaît également un dispositif de sécurité décrit dans le brevet américain US-A-2 878 865 appliqué au dispositif d'entraînement motorisé de l'axe tournant d'une fermeture à enroulement. Ce dispositif de sécurité utilise le principe du décalage angulaire entre deux pièces pour provoquer l'arrêt de l'axe tournant en cas de rupture de la chaîne de transmission. Il n'a aucun effet en cas de rupture d'un ressort d'équilibrage du rideau.There is also known a safety device described in American patent US-A-2 878 865 applied to the motorized drive device of the rotary axis of a winding closure. This safety device uses the principle of angular offset between two parts to cause the rotating axis to stop in the event of a break in the transmission chain. It has no effect in the event of a curtain balancing spring breaking.

Le brevet belge BE-A-388 602 décrit un autre dispositif de sécurité destiné à un volet roulant et constitué d'un frein à cliquet agencé pour freiner la descente du volet et empêcher sa chute en cas de rupture de la commande du volet. Ce dispositif est sollicité en friction à chaque descente du volet et ne peut être utilisé que pour des faibles charges.Belgian patent BE-A-388 602 describes another safety device intended for a roller shutter and consisting of a ratchet brake arranged to slow down the descent of the shutter and prevent it from falling in the event of a break in the shutter control. This device is subjected to friction when the shutter is lowered and can only be used for low loads.

Par conséquent, il n'existe actuellement aucun dispositif connu capable de détecter la rupture d'au moins un des ressorts d'équilibrage dans les fermetures à axes centraux fixes, c'est-à-dire dans lesquelles la bobine qui supporte le rideau et renferme le ressort d'équilibrage est en rotation autour d'un axe fixe.Consequently, there is currently no known device capable of detecting the rupture of at least one of the balancing springs in closures with fixed central axes, that is to say in which the coil which supports the curtain and contains the balancing spring is rotating about a fixed axis.

La présente invention a pour objet principal d'améliorer la sécurité des fermetures à enroulement en vue de répondre aux exigences des normes et décrets en vigueur concernant les fermetures pour baies libres tant en France qu'à l'étranger et notamment pour ce qui concerne la France :

  • 1) La norme NF P 25362 du mois d'octobre 1992 : spécifications techniques et règles de sécurité s'appliquant aux fermetures pour baies libres et portails. Cette norme exige au paragraphe 10.1 que : "Les fermetures à effacement vertical doivent comporter un dispositif de retenue, non sollicité en fonctionnement normal, empêchant la chute du rideau dans le cas de rupture d'un ressort de compensation".
  • 2) Le décret n° 92-333 du 31 mars 1992 (J.O. du 01.04.1992) précise également à l'article R 232-1-2 que : "Les portes et portails s'ouvrant vers le haut doivent être munis d'un système de sécurité les empêchant de retomber".
  • 3) L'arrêté du Ministère du Travail du 21 décembre 1993 (J.O. du 13.01.1994) exige pour les portes et portails des installations existantes ou nouvelles aux articles 2 et 5 que : "La porte ou le portail doit rester solidaire de son support".
The main object of the present invention is to improve the security of roll-up closures in order to meet the requirements of the standards and decrees in force concerning closures for free bays both in France and abroad and in particular as regards the France :
  • 1) Standard NF P 25362 of October 1992: technical specifications and safety rules applying to closings for free bays and gates. This standard requires in paragraph 10.1 that: "Vertical blanking closures shall have a retainer, not stressed in normal operation, preventing the curtain from falling in the event of a compensating spring breaking ".
  • 2) Decree No. 92-333 of March 31, 1992 (OJ of April 1, 1992) also specifies in article R 232-1-2 that: "Doors and gates opening upwards must be fitted with a safety system preventing them from falling back. "
  • 3) The decree of the Ministry of Labor of December 21, 1993 (OJ of January 13, 1994) requires for doors and gates of existing or new installations in articles 2 and 5 that: "The door or the gate must remain integral with its support ".

Plus particulièrement, l'invention concerne un dispositif de fermeture pourvu d'un dispositif de sécurité, appelé dispositif de verrouillage mécanique, qui est conçu, en cas de rupture ou d'anomalie d'au moins un ressort d'équilibrage du rideau de la fermeture, pour assurer l'arrêt quasi immédiat du mouvement de chute du rideau.More particularly, the invention relates to a closing device provided with a safety device, called a mechanical locking device, which is designed, in the event of rupture or anomaly of at least one balancing spring of the curtain of the closing, to ensure the almost immediate stop of the curtain falling movement.

Ce dispositif de verrouillage, objet de l'invention, est destiné à équiper les différentes fermetures mentionnées en préambule, au moment de leur fabrication, de même qu'à équiper les fermetures existantes in situ, dans le cadre des remises en conformité exigées par les arrêtés et décrets cités ci-dessus.This locking device, object of the invention, is intended to equip the various closings mentioned in the preamble, at the time of their manufacture, as well as to equip existing closings in situ, as part of the upgrades required by orders and decrees cited above.

Ces buts sont atteints par un dispositif de fermeture tel que défini en préambule et caractérisé en ce que le dispositif de verrouillage est placé entre l'axe fixe et le ressort d'équilibrage, l'extrémité intérieure du ressort étant solidaire de ce dispositif de verrouillage, lequel est agencé pour coupler positivement la bobine à l'axe fixe, en cas de rupture du ressort d'équilibrage, après un déplacement angulaire α défini entre le dispositif de verrouillage et l'axe fixe, ce déplacement étant contrôlé par un élément de rappel monté entre ledit dispositif de verrouillage et ledit axe fixe.These aims are achieved by a closing device as defined in the preamble and characterized in that the locking device is placed between the fixed axis and the balancing spring, the inner end of the spring being integral with this locking device. , which is arranged to positively couple the coil to the fixed axis, in the event of breakage of the balancing spring, after an angular displacement α defined between the locking device and the fixed axis, this displacement being controlled by an element of reminder mounted between said locking device and said fixed axis.

Le principe de base de l'invention consiste donc à créer un jeu ou décalage en rotation d'un angle α, de façon à permettre le déplacement du dispositif de verrouillage par rapport à l'axe fixe lors de la mise en tension du ressort d'équilibrage. Ce déplacement en rotation est utilisé dans le cas d'une rupture ou d'une défaillance de l'équilibrage par exemple en cas de rupture dudit ressort. Ce déplacement, obtenu grâce à un élément de rappel, permet d'actionner le dispositif de verrouillage en vue de bloquer en rotation la bobine d'entraînement du rideau par rapport à l'axe central fixe de façon à immobiliser l'ensemble. Ce déplacement peut également être utilisé pour déclencher un contact électrique dans le but d'arrêter une éventuelle motorisation.The basic principle of the invention therefore consists in creating a backlash or offset in rotation by an angle α, so as to allow the displacement of the locking device relative to the fixed axis during the tensioning of the spring d 'balancing. This rotational movement is used in the event of a break or a failure in the balancing, for example in the event of said spring breaking. This movement, obtained thanks to a return element, makes it possible to actuate the locking device in order to block in rotation of the curtain drive coil with respect to the fixed central axis so as to immobilize the assembly. This movement can also be used to trigger an electrical contact in order to stop a possible motorization.

Selon une première forme de réalisation de l'invention, le dispositif de verrouillage est prévu à l'extérieur de la bobine et comporte un fourreau cylindrique coaxial à l'axe fixe et agencé pour pouvoir se déplacer par rapport audit axe sur un secteur angulaire défini et sensliblement égal à l'angle α, ce fourreau étant agencé pour porter la bobine, l'extrémité intérieure du ressort à spirale étant solidaire du fourreau, ledit fourreau portant un élément de blocage mobile agencé pour coopérer avec un dispositif d'arrêt solidaire de ladite bobine.According to a first embodiment of the invention, the locking device is provided outside the coil and comprises a cylindrical sheath coaxial with the fixed axis and arranged to be able to move relative to said axis over a defined angular sector and substantially equal to the angle α, this sheath being arranged to carry the coil, the inner end of the spiral spring being integral with the sheath, said sheath carrying a movable blocking element arranged to cooperate with a stop device integral with said coil.

Dans cette première forme de réalisation, le dispositif de verrouillage comporte un élément d'entraînement dudit élément de blocage, cet élément d'entraînement étant fixé à une pièce de liaison solidaire dudit axe fixe, ladite pièce de liaison étant couplée au fourreau par ledit élément de rappel.In this first embodiment, the locking device comprises a drive element for said blocking element, this drive element being fixed to a connecting piece integral with said fixed axis, said connecting piece being coupled to the sheath by said element reminder.

D'une manière avantageuse, l'élément de blocage mobile est porté par un disque solidaire dudit fourreau, l'élément de blocage et le disque se superposant au moins partiellement et communiquant avec ledit élément d'entraînement au travers d'ouvertures respectivement ménagées dans l'élément de blocage et le disque.Advantageously, the movable blocking element is carried by a disc integral with said sleeve, the blocking element and the disc overlapping at least partially and communicating with said drive element through openings respectively formed in the locking element and the disc.

De préférence, l'ouverture prévue dans le disque présente une forme d'arc de cercle centré sur l'axe fixe et s'étend sur un secteur angulaire sensiblement égal audit angle α dans lequel se déplace ledit élément d'entraînement entraînant avec lui l'élément de blocage entre deux positions angulaires stables, une position passive dans laquelle l'élément de blocage n'est pas en prise avec le dispositif d'arrêt et autorise la rotation de la bobine et l'entraînement du rideau de la fermeture, et une position active dans laquelle l'élément de blocage est en prise avec le dispositif d'arrêt et immobilise la bobine et ledit rideau.Preferably, the opening provided in the disc has the shape of an arc of a circle centered on the fixed axis and extends over an angular sector substantially equal to said angle α in which said drive element moves, driving with it the blocking element between two stable angular positions, a passive position in which the blocking element is not engaged with the stop device and authorizes the rotation of the coil and the driving of the curtain of the closure, and an active position in which the locking element is engaged with the stop device and immobilizes the coil and said curtain.

L'élément de blocage comporte avantageusement un cliquet, mais peut comporter toute autre pièce appropriée et le dispositif d'arrêt comporte un roue à rochet, mais peut également comporter toute autre pièce appropriée.The blocking element advantageously comprises a pawl, but may comprise any other suitable part and the stop device comprises a ratchet wheel, but may also comprise any other suitable part.

Dans cette forme de réalisation de l'invention, l'élément de rappel comporte un ressort excentré par rapport audit doigt d'entraînement et dont les extrémités sont reliées au disque et à la pièce de liaison, ce ressort étant agencé pour équilibrer ladite position passive en fonctionnement normal et pour activer ladite position active en cas d'anomalie.In this embodiment of the invention, the return element comprises a spring eccentric with respect to said drive finger and the ends of which are connected to the disc and to the connecting piece, this spring being arranged to balance said passive position in normal operation and to activate said active position in the event of an anomaly.

Dans une seconde forme de réalisation, le dispositif de verrouillage est prévu à l'intérieur de la bobine et comporte un moyeu central entourant partiellement l'axe fixe, ce moyeu étant constitué de deux parties, une première partie fixe appelée moyeu fixe solidaire de l'axe fixe et une seconde partie mobile appelée moyeu mobile solidaire de l'extrémité intérieure du ressort d'équilibrage, le moyeu mobile étant agencé pour pouvoir se déplacer par rapport au moyeu fixe d'un secteur angulaire sensiblement égal à l'angle α, l'un des moyeu portant un élément de blocage mobile agencé pour coopérer avec un dispositif d'arrêt solidaire de la bobine.In a second embodiment, the locking device is provided inside the coil and comprises a central hub partially surrounding the fixed axis, this hub consisting of two parts, a first fixed part called the fixed hub secured to the fixed axis and a second movable part called a movable hub secured to the inner end of the balancing spring, the movable hub being arranged so as to be able to move relative to the fixed hub by an angular sector substantially equal to the angle α, one of the hubs carrying a movable blocking element arranged to cooperate with a stop device secured to the coil.

De préférence, l'élément de blocage mobile est constitué d'un cliquet monté pivotant autour d'un axe A sur un flanc du moyeu fixe, l'axe A étant parallèle à l'axe fixe, ce cliquet étant agencé pour s'étendre au-delà du moyeu fixe, l'avant du cliquet étant destiné à coopérer avec le dispositif d'arrêt de la bobine et l'arrière du cliquet étant couplé à l'élément de rappel.Preferably, the movable blocking element consists of a pawl mounted pivoting about an axis A on a side of the fixed hub, the axis A being parallel to the fixed axis, this pawl being arranged to extend beyond the fixed hub, the front of the pawl being intended to cooperate with the reel stop device and the rear of the pawl being coupled to the return element.

Dans cette seconde forme de réalisation, le dispositif de verrouillage comporte un doigt de retenue du cliquet, ce doigt de retenue étant prévu sur le moyeu mobile et agencé pour s'engager dans un logement correspondant prévu dans la partie avant du cliquet, la partie arrière du cliquet étant couplée au moyeu mobile par ledit élément de rappel.In this second embodiment, the locking device comprises a pawl retaining finger, this retaining finger being provided on the movable hub and arranged to engage in a corresponding housing provided in the front part of the pawl, the rear part of the pawl being coupled to the movable hub by said return element.

Le moyeu mobile est avantageusement séparé du moyeu fixe d'un jeu angulaire sensiblement égal à l'angle α définissant deux positions stables du moyeu mobile, une position passive dans laquelle le cliquet est maintenu par le doigt de retenu, autorisant la rotation de la bobine et le mouvement du rideau, et une position active dans laquelle le cliquet est libéré du doigt de retenue, est pivoté par l'élément de rappel et s'engage dans le dispositif d'arrêt de la bobine, immobilisant la bobine et le rideau.The movable hub is advantageously separated from the fixed hub by an angular play substantially equal to the angle α defining two stable positions of the movable hub, a passive position in which the pawl is held by the retaining finger, allowing the coil to rotate and the movement of the curtain, and an active position in which the pawl is released from the retaining finger, is pivoted by the return element and engages in the reel stop device, immobilizing the reel and the curtain.

De manière préférentielle, les moyeux fixe et mobile comportent sur leurs faces en regard des formes complémentaires agencées pour guider en rotation le moyeu mobile par rapport au moyeu fixe.Preferably, the fixed and mobile hubs have on their opposite faces complementary shapes arranged to guide the movable hub in rotation relative to the fixed hub.

Dans cette variante de réalisation, le dispositif d'arrêt de la bobine est avantageusement constitué par le boîtier de cette bobine, lequel comporte deux parois latérales parallèles assemblées par des barrettes transversales réparties à la périphérie de la bobine et agencées pour servir de butée d'arrêt pour le cliquet.In this variant embodiment, the reel stop device is advantageously constituted by the casing of this reel, which comprises two parallel side walls assembled by transverse bars distributed at the periphery of the reel and arranged to serve as a stop for stop for the ratchet.

L'élément de rappel peut comporter un ressort excentré par rapport au doigt de retenue et dont les extrémités sont reliées au moyeu mobile et à la partie arrière du cliquet, ce ressort étant agencé pour équihibrer ladite position passive en fonctionnement normal et pour activer ladite position active en cas d'anomalie.The return element may comprise a spring eccentric with respect to the retaining finger and the ends of which are connected to the movable hub and to the rear part of the pawl, this spring being arranged to equihibit said passive position in normal operation and to activate said position active in the event of an anomaly.

Le dispositif de fermeture à enroulement selon l'invention peut comporter un dispositif de déverrouillage prévu sur au moins une des extrémités de l'axe fixe et agencé pour autoriser le déroulement manuel du rideau après l'actionnement du dispositif de verrouillage.The roll-up closure device according to the invention may include an unlocking device provided on at least one of the ends of the fixed axis and arranged to allow the manual rolling of the curtain after actuation of the locking device.

Dans ce cas, le dispositif de déverrouillage comporte au moins un manchon de section non circulaire, monté à l'extrémité de l'axe fixe et au moins un support monté dans le bâti dormant, ce support comportant deux logements placés côte à côte, ouverts vers le haut et communiquant entre eux, un premier logement de section complémentaire à celle du manchon correspondant à la position normale de l'axe fixe en fonctionnement, et un second logement de section circulaire correspondant à la position déverrouillée de l'axe fixe.In this case, the unlocking device comprises at least one sleeve of non-circular section, mounted at the end of the fixed axis and at least one support mounted in the standing frame, this support comprising two housings placed side by side, open upwards and communicating with each other, a first housing of section complementary to that of the sleeve corresponding to the normal position of the fixed axis in operation, and a second housing of circular section corresponding to the unlocked position of the fixed axis.

Ce dispositif de déverrouillage peut être complété par un organe de fermeture desdits logements, cet organe étant démontable et agencé pour permettre le dégagement complet de l'axe fixe.This unlocking device can be completed by a member for closing said housings, this member being removable and arranged to allow complete release of the fixed axis.

La présente invention et ses avantages apparaîtront mieux dans la description suivante de plusieurs exemples de réalisation, non limitatifs, en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue schématique d'un dispositif de fermeture à enroulement selon l'invention,
  • la figure 2 est une vue partielle en perspective d'une première forme de réalisation du dispositif de l'invention, montrant le dispositif de verrouillage en position active,
  • la figure 3 est une vue en coupe axiale du dispositif de la figure 2,
  • la figure 4 est une vue de côté du dispositif de la figure 3 illustrant plus particulièrement la pièce solidaire de l'axe fixe, le disque supportant le cliquet et le ressort de rappel,
  • la figure 5 est une vue de côté du dispositif de la figure 3 détaillant le cliquet, la roue à rochet et le microcontact électrique,
  • la figure 6 est une vue en perspective d'une seconde forme de réalisation du dispositif de l'invention,
  • la figure 7 est une vue de côté du dispositif de la figure 6 en position passive,
  • la figure 8 est une vue de côté du dispositif de la figure 6 en position active,
  • la figure 9 est une vue suivant l'axe longitudinal du dispositif de la figure 6,
  • la figure 10 est une vue en perspective du dispositif de verrouillage en position normale, et
  • la figure 11 est une vue en perspective du dispositif de la figure 10 en position déverrouillée.
The present invention and its advantages will appear better in the following description of several non-limiting exemplary embodiments, with reference to the appended drawings, in which:
  • FIG. 1 is a schematic view of a winding closure device according to the invention,
  • FIG. 2 is a partial perspective view of a first embodiment of the device of the invention, showing the locking device in the active position,
  • FIG. 3 is a view in axial section of the device of FIG. 2,
  • FIG. 4 is a side view of the device of FIG. 3 illustrating more particularly the part secured to the fixed axis, the disc supporting the pawl and the return spring,
  • FIG. 5 is a side view of the device in FIG. 3 detailing the pawl, the ratchet wheel and the electrical microswitch,
  • FIG. 6 is a perspective view of a second embodiment of the device of the invention,
  • FIG. 7 is a side view of the device of FIG. 6 in the passive position,
  • FIG. 8 is a side view of the device of FIG. 6 in the active position,
  • FIG. 9 is a view along the longitudinal axis of the device in FIG. 6,
  • FIG. 10 is a perspective view of the locking device in the normal position, and
  • Figure 11 is a perspective view of the device of Figure 10 in the unlocked position.

En référence à la figure 1, le dispositif de fermeture à enroulement 10 selon l'invention, illustré partiellement, comporte un axe central fixe 1 sur lequel sont montées au moins deux bobines 2, dont une seule est représentée. Chaque bobine 2 est pourvue d'un ressort d'équilibrage à spirale. Le dispositif de fermeture 10 comporte un rideau 4 composé de lames 5 juxtaposées et s'enroulant autour des bobines 2. Le rideau 4 est couplé solidairement aux bobines 2 par au moins sa lame supérieure à l'aide de boulons, de soudure ou de tout autre moyen approprié. L'axe fixe 1 est monté à ses deux extrémités 1' dans un bâti dormant 6 de manière à être bloqué en rotation. Le nombre des bobines 2 réparties sur l'axe fixe 1 est fonction du poids et des dimensions du rideau 4 de la fermeture. Chaque bobine 2 est équipée d'un dispositif de verrouillage 50. Pour des questions de clarté, les figures et la description correspondante ne tiennent compte que d'une seule bobine et d'un seul dispositif de verrouillage.Referring to Figure 1, the winding closure device 10 according to the invention, partially illustrated, has a fixed central axis 1 on which are mounted at least two coils 2, only one of which is shown. Each coil 2 is provided with a spiral balancing spring. The closing device 10 comprises a curtain 4 composed of blades 5 juxtaposed and winding around the coils 2. The curtain 4 is coupled integrally to the coils 2 by at least its upper blade using bolts, welding or any other appropriate means. The fixed axis 1 is mounted at its two ends 1 ′ in a dormant frame 6 so as to be locked in rotation. The number of coils 2 distributed on the fixed axis 1 is a function of the weight and dimensions of the curtain 4 of the closure. Each coil 2 is equipped with a locking device 50. For reasons of clarity, the figures and the corresponding description take account of only a single coil and a single locking device.

Les figures 2 à 5 illustrent une première forme de réalisation du dispositif de verrouillage 20 de l'invention, prévu à l'extérieur de la bobine 2. Il comporte un fourreau 21 coaxial à l'axe fixe 1 sur lequel est montée la bobine 2. Ce fourreau 21 se présente sous la forme d'une pièce tubulaire réalisée en une ou deux parties pour faciliter le montage. Il est équipé d'un étoquiau 22 pour fixer l'extrémité intérieure du ressort d'équilibrage 3, l'extrémité extérieure du ressort 3 étant fixée sur la face intérieure de la bobine 2 par une vis ou un étoquiau 23.Figures 2 to 5 illustrate a first embodiment of the locking device 20 of the invention, provided outside the coil 2. It comprises a sheath 21 coaxial with the fixed axis 1 on which is mounted the coil 2 This sheath 21 is in the form of a tubular part made in one or two parts to facilitate assembly. It is equipped with a star 22 to fix the inner end of the balancing spring 3, the outer end of the spring 3 being fixed on the inner face of the coil 2 by a screw or a star 23.

Un ensemble de trous traversants 24 est prévu sur la bobine 2, l'axe fixe 1 et le fourreau 21 de façon à se superposer. Cet ensemble de trous permet d'immobiliser en rotation les trois éléments à l'aide d'une goupille mobile non représentée afin de permettre la prétension du ressort 3 en usine.A set of through holes 24 is provided on the coil 2, the fixed axis 1 and the sleeve 21 so as to overlap. This set of holes makes it possible to immobilize the three elements in rotation using a movable pin not shown in order to allow the pretensioning of the spring 3 in the factory.

La bobine 2 peut être équipée de roulements à billes ou à aiguilles (non représentés) sur les deux paliers en rotation sur le fourreau 21, ceci afin d'éviter une usure prématurée des paliers et de faciliter les manoeuvres d'ouverture et de fermeture dudit rideau 4.The coil 2 can be equipped with ball or needle bearings (not shown) on the two bearings in rotation on the sleeve 21, this in order to avoid premature wear of the bearings and to facilitate the opening and closing operations of said curtain 4.

Le fourreau 21 est pourvu à une extrémité d'une lumière 25 qui s'étend sur un angle α et reçoit une goupille ou un boulon 26, ladite goupille étant solidaire de l'axe fixe 1. Le diamètre de la lumière 25 est légèrement supérieur au diamètre de la goupille 26 de façon à permettre une rotation aisée du fourreau 21 sur l'axe fixe 1.The sleeve 21 is provided at one end with a slot 25 which extends over an angle α and receives a pin or a bolt 26, said pin being integral with the fixed axis 1. The diameter of the slot 25 is slightly greater to the diameter of the pin 26 so as to allow easy rotation of the sleeve 21 on the fixed axis 1.

L'autre extrémité du fourreau 21 est équipée d'un disque 27 rendu solidaire du fourreau par des soudures ou par tout autre moyen de fixation adapté. Le disque 27 est pourvu d'au moins un trou 28 pour la fixation d'au moins un cliquet 30 par une vis 29 et comporte sur son pourtour deux butées 31 destinées à servir d'arrêt au cliquet 30 en position active (figure 5).The other end of the sheath 21 is equipped with a disc 27 made integral with the sheath by welds or by any other suitable fixing means. The disc 27 is provided with at least one hole 28 for fixing at least one pawl 30 by a screw 29 and has on its periphery two stops 31 intended to serve as a stop for the pawl 30 in the active position (FIG. 5) .

Une fenêtre 32, en forme d'arc de cercle centré sur l'axe fixe 1, est prévue dans le disque 27 afin de permettre le passage d'un doigt d'entraînement 33 qui sert à actionner le cliquet 30 au travers d'une fenêtre 30' suivant l'état du ressort d'équilibrage 3. Un ou plusieurs points de fixation 34 d'un ressort de rappel 35 peuvent également être aménagés sur ledit disque 27 sous la forme d'un axe, d'une vis ou de tout autre moyen adapté.A window 32, in the form of a circular arc centered on the fixed axis 1, is provided in the disc 27 in order to allow the passage of a drive finger 33 which serves to actuate the pawl 30 through a window 30 'depending on the state of the balancing spring 3. One or more fixing points 34 of a return spring 35 can also be arranged on said disc 27 in the form of an axis, a screw or any other suitable means.

Un manchon 36 est rendu solidaire de l'axe fixe 1 par l'intermédiaire d'une goupille 37, d'un boulon ou tout autre moyen de fixation adapté. Ce manchon 36 est solidaire d'une pièce de liaison 38 fixée par soudure ou par un autre moyen similaire. La pièce de liaison 38 est équipée du doigt d'entraînement 33 destiné à actionner le cliquet 30. Deux trous 39 sont prévus dans la pièce de liaison 38 pour permettre la fixation du ressort de rappel 35 suivant la disposition gauche ou droite. Un ou plusieurs ressorts de rappel 35 sont en tension permanente entre la pièce de liaison 38 solidaire de l'axe fixe 1 et le disque 27 solidaire de l'extrémité intérieure du ressort d'équilibrage 3 et supportant le cliquet 30.A sleeve 36 is made integral with the fixed axis 1 by means of a pin 37, a bolt or any other suitable fixing means. This sleeve 36 is integral with a connecting piece 38 fixed by welding or by another similar means. The connecting piece 38 is equipped with the drive finger 33 intended to actuate the pawl 30. Two holes 39 are provided in the connecting piece 38 to allow the fixing of the return spring 35 according to the left or right arrangement. One or more return springs 35 are in permanent tension between the connecting piece 38 secured to the fixed axis 1 and the disc 27 secured to the inner end of the balancing spring 3 and supporting the pawl 30.

Une roue à rochet 40 est rendue solidaire de la bobine 2 à l'aide de boulons 41, rivets, soudures ou tout autre moyen approprié. Elle est de préférence conçue en deux demi-pièces identiques de façon à pouvoir être montée sur la bobine 2 sans démonter l'axe fixe 1. Cette roue à rochet 40 est pourvue d'encoches 42, de dents, d'entailles, de trous ou d'autres aspérités sur son pourtour de façon à présenter des butées d'arrêt lors du positionnement actif du cliquet 30, afin de permettre une immobilisation rapide et efficace de la bobine 2.A ratchet wheel 40 is made integral with the reel 2 using bolts 41, rivets, welds or any other suitable means. It is preferably designed in two identical half-pieces so that it can be mounted on the coil 2 without dismantling the fixed axle 1. This ratchet wheel 40 is provided with notches 42, teeth, notches, holes or other roughness around its periphery so as to present stops when the pawl 30 is actively positioned, in order to allow rapid and effective immobilization of the coil 2.

Un microrupteur ou fin de course 42 peut être prévu sur le disque 27. Le microrupteur peut être actionné par le cliquet 30 ou par toute autre pièce en déplacement. Il est utilisé pour fournir une information électrique destinée à une éventuelle motorisation de la fermeture afin d'arrêter tout mouvement en cas de défaillance du système d'équilibrage ou d'une mise en action accidentelle du dispositif de verrouillage.A microswitch or limit switch 42 can be provided on the disc 27. The microswitch can be actuated by the pawl 30 or by any other moving part. It is used to provide electrical information intended for a possible motorization of the closure in order to stop any movement in the event of failure of the balancing system or of an accidental actuation of the locking device.

Le cliquet 30 peut avoir différentes formes suivant les types de ressort 35, de doigt d'entraînement 33, de roue à rochet 40 ou selon le fonctionnement désiré. Le déclenchement de ce cliquet 30 peut également être provoqué par différents systèmes sous l'action du déplacement du fourreau 21 par rapport à l'axe fixe 1.The pawl 30 may have different shapes depending on the types of spring 35, drive finger 33, ratchet wheel 40 or according to the desired operation. The triggering of this pawl 30 can also be caused by different systems under the action of the displacement of the sheath 21 relative to the fixed axis 1.

Pour une question de facilité de montage, le choix du type de ressort s'est porté sur un ressort de traction, mais ce ressort peut être remplacé par tout autre ressort ou moyen équivalent approprié.For ease of assembly, the choice of the type of spring fell on a tension spring, but this spring can be replaced by any other suitable spring or equivalent means.

Le fonctionnement de cette première forme de réalisation du dispositif selon l'invention est détaillé ci-après.The operation of this first embodiment of the device according to the invention is detailed below.

Dans cette réalisation, le système d'équilibrage classique des dispositifs de fermeture à enroulement est modifié par le fait que la bobine 2 contenant le ressort d'équilibrage à spirale 3 n'est pas montée directement sur l'axe fixe 1 mais sur une pièce intermédiaire appelée ici fourreau 21. L'étoquiau 22 normalement solidaire de l'axe fixe 1 est ici solidaire du fourreau 21 de façon à permettre la libre rotation du fourreau 21 sur l'axe fixe 1. Le ressort d'équilibrage 3 est donc en tension par rapport au fourreau 21 et non plus par rapport à l'axe fixe 1 comme sur les dispositifs de fermeture non équipés d'un dispositif de verrouillage. Les lames 5 du rideau 4 sont fixées sur les bobines 2 d'une manière traditionnelle.In this embodiment, the conventional balancing system of the winding closure devices is modified by the fact that the coil 2 containing the spiral balancing spring 3 is not mounted directly on the fixed axis 1 but on a workpiece intermediate here called sheath 21. The clamp 22 normally attached to the fixed axis 1 is here secured to the sheath 21 so as to allow the free rotation of the sheath 21 on the fixed axis 1. The balancing spring 3 is therefore in tension relative to the sleeve 21 and no longer relative to the fixed axis 1 as on the closing devices not equipped with a locking device. The blades 5 of the curtain 4 are fixed to the coils 2 in a traditional way.

Sous l'effet de la rotation de la bobine 2 dans le sens de la force F, rotation provoquée par la descente du rideau 4, le ressort d'équilibrage à spirale 3 emmagasine de l'énergie symbolisée par la force R qui est ensuite restituée pendant la remontée du rideau 4. La mise en tension du ressort à spirale 3 a également pour effet de provoquer la rotation du fourreau 21 par rapport à l'axe fixe 1. Cette rotation s'étend sur l'angle α contrôlé par le débattement de la goupille 26 dans la lumière 25 prévue dans le fourreau 21.Under the effect of the rotation of the coil 2 in the direction of the force F, rotation caused by the descent of the curtain 4, the spiral balancing spring 3 stores energy symbolized by the force R which is then restored during the raising of the curtain 4. The tensioning of the spiral spring 3 also has the effect of causing the rotation of the sleeve 21 relative to the fixed axis 1. This rotation extends over the angle α controlled by the travel of the pin 26 in the slot 25 provided in the sleeve 21.

La rotation dudit fourreau 21 provoque la rotation du disque 27 et la mise en tension du ressort de rappel 35. La rotation du disque 27 génère, par l'intermédiaire du doigt d'entraînement 33 fixe, le dégagement du cliquet 30 des encoches 42 de la roue à rochet 40, permettant ainsi la libre rotation de la bobine 2 par rapport à l'axe fixe 1 et autorisant de ce fait l'utilisation du dispositif de fermeture 10.The rotation of said sheath 21 causes the rotation of the disc 27 and the tensioning of the return spring 35. The rotation of the disc 27 generates, by means of the fixed drive finger 33, the release of the pawl 30 from the notches 42 of the ratchet wheel 40, thus allowing the free rotation of the reel 2 relative to the fixed axis 1 and thereby authorizing the use of the closing device 10.

Le déplacement du cliquet 30 rétablit également le contact électrique du microrupteur 42 et permet ainsi l'utilisation de l'éventuelle motorisation de la fermeture qui commande la rotation des bobines 2.The movement of the pawl 30 also re-establishes the electrical contact of the microswitch 42 and thus allows the use of the possible motorization of the closure which controls the rotation of the coils 2.

On comprend aisément qu'une rupture du ressort d'équilibrage 3 ou de l'une de ses fixations 22 ou 23 provoque l'annulation de la force R sur la bobine 2 alors que, simultanément, le ressort de rappel 35 se détend et provoque la rotation du fourreau 21 par la rotation du disque 27.It is easily understood that a rupture of the balancing spring 3 or of one of its fixings 22 or 23 causes the cancellation of the force R on the coil 2 while, simultaneously, the return spring 35 relaxes and causes the rotation of the sheath 21 by the rotation of the disc 27.

Le doigt d'entraînement 33 prévu sur la pièce 38 solidaire de l'axe fixe 1 change de position dans l'ouverture 32 prévue à cet effet. Ce déplacement entraîne le cliquet 30 qui vient se loger dans une des encoches 42 de la roue à rochet 40 provoquant ainsi l'arrêt quasi immédiat de la bobine 2 et de la chute du rideau 4 de la fermeture. La position active du cliquet 30 est représentée en pointillés sur la figure 5. La course du cliquet 30 est contrôlée par la butée 31. Le déplacement du cliquet 30 provoque également l'arrêt immédiat de la motorisation par l'intermédiaire du microrupteur électrique 42.The drive finger 33 provided on the part 38 integral with the fixed axis 1 changes position in the opening 32 provided for this purpose. This movement causes the pawl 30 which is housed in one of the notches 42 of the ratchet wheel 40 thus causing the almost immediate stop of the coil 2 and the fall of the curtain 4 of the closure. The active position of the pawl 30 is shown in dotted lines in FIG. 5. The stroke of the pawl 30 is controlled by the stop 31. The movement of the pawl 30 also causes the motorization to stop immediately via the electric microswitch 42.

Les figures 6 à 9 illustrent une seconde forme de réalisation du dispositif de verrouillage 50 de l'invention, prévu à l'intérieur de la bobine 2. Il comporte un moyeu central 51 coaxial à l'axe fixe 1 et l'entourant partiellement. Ce moyeu 51 est constitué de deux parties, une première fixe 52 appelée moyeu fixe et une seconde mobile 53 appelée moyeu mobile. Le moyeu fixe 52 est couplé solidairement à l'axe fixe 1 par au moins une vis 54 ou par tout autre moyen approprié. Il est formé d'un secteur cylindrique s'étendant sur un angle inférieur à 90°. Le moyeu mobile 53 est libre en rotation sur l'axe fixe 1 et est formé d'un secteur cylindrique s'étendant sur un angle supérieur à 180° afin d'être maintenu autour dudit axe 1. Les deux moyeux 52, 53 sont séparés d'un jeu angulaire égal à un angle α défini par le secteur angulaire resté libre sur 360°. Les moyeux 52, 53 présentent sur leurs faces en regard des formes complémentaires agencées pour guider le moyeu mobile 53 par rapport au moyeu fixe 52. Les formes complémentaires illustrées dans la figure 9 comportent une rainure 52' sur le moyeu fixe 52 et un rail 53' sur le moyeu mobile 53, mais ne sont pas limitatives.Figures 6 to 9 illustrate a second embodiment of the locking device 50 of the invention, provided inside the coil 2. It has a central hub 51 coaxial with the fixed axis 1 and partially surrounding it. This hub 51 consists of two parts, a first fixed 52 called a fixed hub and a second mobile 53 called a mobile hub. The fixed hub 52 is integrally coupled to the fixed axis 1 by at least one screw 54 or by any other suitable means. It is formed by a cylindrical sector extending over an angle less than 90 °. The movable hub 53 is free to rotate on the fixed axis 1 and is formed of a cylindrical sector extending over an angle greater than 180 ° so as to be held around said axis 1. The two hubs 52, 53 are separated an angular clearance equal to an angle α defined by the angular sector which remains free over 360 °. The hubs 52, 53 have on their opposite faces complementary shapes arranged to guide the movable hub 53 relative to the fixed hub 52. The complementary shapes illustrated in FIG. 9 include a groove 52 'on the fixed hub 52 and a rail 53 'on the movable hub 53, but are not limiting.

La bobine 2 peut être équipée de roulements à billes ou à aiguilles (non représentés) sur les deux paliers en rotation sur l'axe fixe 1, ceci afin d'éviter une usure prématurée des paliers et de faciliter les manoeuvres d'ouverture et de fermeture du rideau 4. Cette bobine 2 est formée d'un boîtier constitué de deux parois latérales parallèles 7 reliées par des barrettes 8 réparties sur le périmètre extérieur de cette bobine.The coil 2 can be fitted with ball or needle bearings (not shown) on the two bearings in rotation on the fixed axis 1, this in order to avoid premature wear of the bearings and to facilitate the opening and closing operations. closing the curtain 4. This coil 2 is formed of a housing made up of two parallel lateral walls 7 connected by bars 8 distributed on the external perimeter of this coil.

L'extrémité intérieure du ressort d'équilibrage 3 est fixée au moyeu mobile 53 par au moins un étoquiau 55 ou par tout autre moyen approprié, l'extremité extérieure du ressort 3 étant fixée sur une des barrettes 8 au moyeu d'un étoquiau 9, d'une vis ou de tout autre moyen de fixation.The inner end of the balancing spring 3 is fixed to the movable hub 53 by at least one star 55 or by any other suitable means, the outer end of the spring 3 being fixed on one of the bars 8 to the hub of a star 9 , a screw or any other means of attachment.

Le moyeu fixe 52 porte sur un de ses flancs un cliquet 60 pivotant autour d'un axe A défini par une vis de fixation 61 parallèle à l'axe fixe 1. Ce cliquet 60 est constitué d'une tôle en forme de croissant de lune s'étendant au-delà du moyeu fixe 52, par une partie avant destinée à coopérer avec le dispositif d'arrêt de la bobine 2 et par une partie arrière couplée à un ressort de rappel 65.The fixed hub 52 carries on one of its flanks a pawl 60 pivoting about an axis A defined by a fixing screw 61 parallel to the fixed axis 1. This pawl 60 consists of a sheet in the shape of a crescent moon extending beyond the fixed hub 52, by a front part intended to cooperate with the reel stop device 2 and by a rear part coupled to a return spring 65.

Le moyeu mobile 53 porte sur un de ses flancs un doigt de retenue 63 en forme de coin et agencé pour s'engager dans un logement 64 correspondant prévu dans la partie avant du cliquet 60. Ce doigt de retenue 63 maintient le cliquet 60 en position passive.The movable hub 53 carries on one of its flanks a retaining finger 63 in the form of a wedge and arranged to engage in a corresponding housing 64 provided in the front part of the pawl 60. This retaining finger 63 maintains the pawl 60 in position passive.

Le moyeu mobile 53 est couplé à l'une des extrémités du ressort de rappel 65 dans un trou de fixation 66, l'autre extrémité étant fixée dans un trou correspondant 67 prévu dans la partie arrière du cliquet 60. Le moyeu mobile 53 porte deux oreilles 68 parallèles en prolongement de ses flancs et agencées pour guider le ressort d'équilibrage 3, notamment en cas de rupture pour l'isoler du dispositif de verrouillage 50. Le trou de fixation 66 est prévu dans l'oreille 68 correspondante.The movable hub 53 is coupled to one end of the return spring 65 in a fixing hole 66, the other end being fixed in a corresponding hole 67 provided in the rear part of the pawl 60. The movable hub 53 carries two ears 68 parallel in extension of its sides and arranged to guide the balancing spring 3, in particular in the event of rupture to isolate it from the locking device 50. The fixing hole 66 is provided in the corresponding ear 68.

Le dispositif d'arrêt de la bobine 2 est constitué par le boîtier de cette bobine 2 et notamment par les barrettes transversales 8, ce qui permet de simplifier considérablement l'ensemble du dispositif de verrouillage, réduisant ainsi les coûts.The reel 2 stop device is constituted by the casing of this reel 2 and in particular by the transverse bars 8, which makes it possible to considerably simplify the whole of the locking device, thereby reducing costs.

Pour une question de facilité de montage, le choix du type de ressort s'est porté sur un ressort de traction, mais ce ressort peut être remplacé par tout autre ressort ou moyen équivalent approprié.For ease of assembly, the choice of the type of spring fell on a tension spring, but this spring can be replaced by any other suitable spring or equivalent means.

Le fonctionnement de cette seconde forme de réalisation du dispositif selon l'invention est détaillé ci-après.The operation of this second embodiment of the device according to the invention is detailed below.

Dans cette seconde réalisation, le système d'équilibrage classique des dispositifs de fermeture à enroulement est modifié par le fait que la bobine 2 contenant le ressort d'équilibrage à spirale 3 est équipée du dispositif de verrouillage 50. L'étoquiau 55 normalement solidaire de l'axe fixe 1 est ici solidaire du moyeu mobile 53 de manière à permettre la libre rotation de ce moyeu sur l'axe fixe 1. Le ressort d'équilibrage 3 est donc en tension par rapport au moyeu mobile 53 et non plus par rapport à l'axe fixe 1 comme précédemment. Les lames 5 du rideau 4 sont comme dans le cas précédent fixées sur les bobines 2 d'une manière traditionnelle.In this second embodiment, the conventional balancing system of the winding closure devices is modified by the fact that the coil 2 containing the spring balancing spiral 3 is equipped with the locking device 50. The clamp 55 normally secured to the fixed axis 1 is here secured to the movable hub 53 so as to allow the free rotation of this hub on the fixed axis 1. The balancing spring 3 is therefore under tension with respect to the movable hub 53 and no longer with respect to the fixed axis 1 as before. The blades 5 of the curtain 4 are as in the previous case fixed on the coils 2 in a traditional manner.

Sous l'effet de la rotation de la bobine 2 dans le sens de la force F, rotation provoquée par la descente du rideau 4, le ressort d'équilibrage à spirale 3 emmagasine de l'énergie symbolisée par la force R qui est ensuite restituée pendant la remontée du rideau 4. La mise en tension du ressort à spirale 3 a également pour effet de provoquer la rotation du moyeu mobile 53 par rapport à l'axe fixe 1. Cette rotation s'étend sur l'angle α contrôlée par le jeu angulaire existant entre le moyeu mobile 53 et le moyeu fixe 52.Under the effect of the rotation of the coil 2 in the direction of the force F, rotation caused by the descent of the curtain 4, the spiral balancing spring 3 stores energy symbolized by the force R which is then restored during the raising of the curtain 4. The tensioning of the spiral spring 3 also has the effect of causing the rotation of the movable hub 53 relative to the fixed axis 1. This rotation extends over the angle α controlled by the angular clearance existing between the movable hub 53 and the fixed hub 52.

La rotation du moyeu mobile 53 provoque la mise en tension du ressort de rappel 65 et génère, par l'introduction du doigt de retenue 63 dans le logement 64, le dégagement du cliquet 60 de la barrette 8, permettant ainsi la libre rotation de la bobine 2 par rapport à l'axe fixe 1 et autorisant de ce fait l'utilisation du dispositif de fermeture 10.The rotation of the movable hub 53 causes the return spring 65 to be tensioned and generates, by the introduction of the retaining finger 63 in the housing 64, the release of the pawl 60 from the bar 8, thus allowing the free rotation of the coil 2 relative to the fixed axis 1 and thereby authorizing the use of the closing device 10.

On comprend aisément qu'une rupture du ressort d'équilibrage 3 ou de l'une de ses fixations 55 ou 9 provoque l'annulation de la force R sur la bobine 2 alors que, simultanément, le ressort de rappel 65 se détend et provoque la rotation du moyeu mobile 53.It is easily understood that a rupture of the balancing spring 3 or of one of its fasteners 55 or 9 causes the cancellation of the force R on the coil 2 while, simultaneously, the return spring 65 relaxes and causes the rotation of the movable hub 53.

Le doigt de retenue 63 solidaire du moyeu mobile 53 se dégage du logement 64 libérant le cliquet 60 qui, sous l'effet du ressort de rappel 65, pivote et vient se loger entre deux barrettes 8 de la bobine 2, provoquant ainsi l'arrêt quasi immédiat de la bobine 2 et de la chute du rideau 4 de la fermeture.The retaining finger 63 secured to the movable hub 53 emerges from the housing 64 releasing the pawl 60 which, under the effect of the return spring 65, pivots and is housed between two bars 8 of the coil 2, thus causing the stop almost immediate reel 2 and the fall of the curtain 4 of the closure.

La course du cliquet 60 est contrôlée par sa partie arrière qui bute contre l'axe fixe 1.The stroke of the pawl 60 is controlled by its rear part which abuts against the fixed axis 1.

Dans cette variante, il peut être prévu d'associer un microrupteur électrique afin de détecter le déclenchement du dispositif de verrouillage.In this variant, it can be provided to associate an electric microswitch in order to detect the triggering of the locking device.

Cette seconde variante de réalisation a été spécialement conçue pour équiper les dispositifs de fermeture à enroulement sortie d'usine. En effet, l'intégration d'un dispositif de verrouillage à l'intérieur des bobines d'équilibrage nécessite l'utilisation de nouvelles bobines par rapport aux bobines traditionnellement utilisées. Ceci implique bien entendu une réduction considérable du prix de revient du dispositif de verrouillage compte tenu de la réduction du nombre de pièces engendrée.This second variant has been specially designed to equip winding closure devices ex works. Indeed, the integration of a locking device inside the balancing coils requires the use of new coils compared to the coils traditionally used. This of course implies a considerable reduction in the cost price of the locking device taking into account the reduction in the number of parts generated.

Les figures 10 et 11 illustrent un dispositif de déverrouillage 70 prévu à au moins une extrémité de l'axe fixe 1 et agencé pour permettre d'intervenir sur le dispositif de fermeture 10 après incident. En effet, après actionnement du dispositif de verrouillage 20 ou 50, il est impossible de dérouler le rideau 4 étant donné que les bobines 3 sont bloquées en rotation. Ce dispositif de déverrouillage 70 permet d'autoriser le déroulement du rideau 4 malgré ce blocage.Figures 10 and 11 illustrate an unlocking device 70 provided at at least one end of the fixed axis 1 and arranged to allow intervention on the closure device 10 after incident. Indeed, after actuation of the locking device 20 or 50, it is impossible to unwind the curtain 4 since the coils 3 are locked in rotation. This unlocking device 70 makes it possible to authorize the unwinding of the curtain 4 despite this blocking.

Il comporte un manchon 71 de section non circulaire prévu à l'extrémité de l'axe fixe 1 et un support 72 en tôle monté dans le bâti dormant. Ce support 72 comporte deux logements 73, 74 placés côte à côte, ouverts vers le haut et communiquant entre eux. Le premier logement 73 présente une section non circulaire complémentaire à celle du manchon 71 et correspond à la position normale de fonctionnement de l'axe fixe 1. Du fait que les sections ne sont pas circulaires, cet axe 1 est bloqué en rotation. Le second logement 74, situé de préférence devant le premier, présente une section circulaire et correspond à la position déverrouillée de l'axe fixe 1. Si l'axe fixe 1 est placé dans ce second logement 74, le manchon 71 peut tourner et il est alors possible de dérouler le rideau 4 en faisant tourner l'axe 1.It comprises a sleeve 71 of non-circular section provided at the end of the fixed axis 1 and a support 72 of sheet metal mounted in the standing frame. This support 72 comprises two housings 73, 74 placed side by side, open upwards and communicating with each other. The first housing 73 has a non-circular section complementary to that of the sleeve 71 and corresponds to the normal operating position of the fixed axis 1. Because the sections are not circular, this axis 1 is blocked in rotation. The second housing 74, preferably located in front of the first, has a circular section and corresponds to the unlocked position of the fixed axis 1. If the fixed axis 1 is placed in this second housing 74, the sleeve 71 can rotate and it it is then possible to unroll the curtain 4 by rotating the axis 1.

Ce dispositif de déverrouillage 70 comporte encore un organe de fermeture 75 des logements 73, 74, situé au-dessus d'eux et démontable pour pouvoir sortir complètement l'axe fixe 1 du support 72.This unlocking device 70 also comprises a member 75 for closing the housings 73, 74, located above them and removable in order to be able to completely remove the fixed axis 1 from the support 72.

La présente invention n'est pas limitée aux exemples de réalisation décrits mais s'étend à toute modification et variante évidente pour un homme du métier. Notamment, le dispositif de verrouillage peut être adapté à tout type de fermeture à enroulement comme, par exemple, des volets roulants. Dans ce cas, le ressort d'équilibrage à spirale est remplacé par un ressort de torsion disposé entre l'axe fixe et le tube d'enroulement du volet.The present invention is not limited to the embodiments described, but extends to any modification and variant obvious to a person skilled in the art. In particular, the locking device can be adapted to any type of roll-up closure, such as, for example, roller shutters. In this case, the spiral balancing spring is replaced by a torsion spring arranged between the fixed axis and the shutter winding tube.

Claims (17)

Dispositif de fermeture à enroulement (10) comportant un rideau (4) composé de lames (5) juxtaposées, un axe fixe (1) dont les extrémités sont montées dans un bâti dormant, au moins une bobine (2) pourvue d'au moins un ressort d'équilibrage (3) à spirale dont l'extrémité extérieure est couplée solidaire à ladite bobine, cette bobine étant montée sur l'axe fixe et étant solidaire d'au moins une lame supérieure (5) dudit rideau (4) autour de laquelle il s'enroule, ce dispositif de fermeture comportant un dispositif de verrouillage mécanique (20, 50) agencé pour arrêter la chute du rideau (4) en cas de rupture du ressort d'équilibrage (3) ou de la fixation de ce ressort, caractérisé en ce que le dispositif de verrouillage (20,50) est placé entre l'arbre fixe (1) et le ressort d'équilibrage (3), l'extrémité intérieure du ressort (3) étant solidaire de ce dispositif de verrouillage (20,50), lequel est agencé pour coupler positivement la bobine (2) à l'axe fixe (1), en cas de rupture du ressort d'équilibrage, après un déplacement angulaire α défini entre le dispositif de verrouillage (20,50) et l'axe fixe (1), ce déplacement étant contrôlé par un élément de rappel (35,65) monté entre ledit dispositif de verrouillage (20,50) et ledit axe fixe (1).Winding closure device (10) comprising a curtain (4) composed of juxtaposed blades (5), a fixed axis (1) the ends of which are mounted in a fixed frame, at least one coil (2) provided with at least a balancing spring (3) with a spiral whose external end is integral with said coil, this coil being mounted on the fixed axis and being integral with at least one upper blade (5) of said curtain (4) around from which it is wound, this closing device comprising a mechanical locking device (20, 50) arranged to stop the fall of the curtain (4) in the event of a break in the balancing spring (3) or of the fixing of this spring, characterized in that the locking device (20.50) is placed between the fixed shaft (1) and the balancing spring (3), the inner end of the spring (3) being integral with this device latch (20.50), which is arranged to positively couple the coil (2) to the fix axis e (1), in the event of a break in the balancing spring, after an angular displacement α defined between the locking device (20.50) and the fixed axis (1), this displacement being controlled by a return element ( 35.65) mounted between said locking device (20.50) and said fixed axis (1). Dispositif selon la revendication 1, caractérisé en ce que le dispositif de verrouillage (20) est prévu à l'extérieur de la bobine (2) et comporte un fourreau cylindrique (21) coaxial à l'axe fixe (1) et agencé pour pouvoir se déplacer par rapport audit axe sur un secteur angulaire défini et sensiblement égal à l'angle α, ce fourreau (21) étant agencé pour porter la bobine (2), l'extrémité intérieure du ressort (3) à spirale étant solidaire du fourreau (21), et en ce que ledit fourreau (21) porte un élément de blocage mobile (30) agencé pour coopérer avec un dispositif d'arrêt (40) solidaire de ladite bobine (2).Device according to claim 1, characterized in that the locking device (20) is provided outside the coil (2) and comprises a cylindrical sheath (21) coaxial with the fixed axis (1) and arranged to be able move relative to said axis over a defined angular sector and substantially equal to the angle α, this sheath (21) being arranged to carry the coil (2), the inner end of the spiral spring (3) being integral with the sheath (21), and in that said sheath (21) carries a movable blocking element (30) arranged to cooperate with a stop device (40) integral with said coil (2). Dispositif selon la revendication 2, caractérisé en ce que le dispositif de verrouillage (20) comporte un élément d'entraînement (33) dudit élément de blocage (30), cet élément d'entraînement étant fixé à une pièce de liaison (38) solidaire dudit axe fixe (1) et en ce que la pièce de liaison (38) est couplée au fourreau (21) par ledit élément de rappel (35).Device according to claim 2, characterized in that the locking device (20) comprises a drive element (33) of said blocking element (30), this drive element being fixed to a connecting piece (38) integral of said fixed axis (1) and in that the connecting piece (38) is coupled to the sleeve (21) by said return element (35). Dispositif selon la revendication 3, caractérisé en ce que l'élément de blocage mobile (30) est porté par un disque (27) solidaire dudit fourreau (21) et en ce que l'élément de blocage (30) et le disque (27) se superposent au moins partiellement et communiquent avec ledit élément d'entraînement (33) au travers d'ouvertures (30',32) respectivement ménagées dans l'élément de blocage (30) et le disque (27).Device according to claim 3, characterized in that the movable blocking element (30) is carried by a disc (27) integral with said sheath (21) and in that the locking element (30) and the disc (27) overlap at least partially and communicate with said driving element (33) through openings (30 ', 32) respectively formed in the locking element ( 30) and the disc (27). Dispositif selon la revendication 4, caractérisé en ce que l'ouverture (32) prévue dans le disque (27) présente une forme d'arc de cercle centré sur l'axe fixe (1) et s'étend sur un secteur angulaire sensiblement égal audit angle α dans lequel se déplace ledit élément d'entraînement (33) entraînant avec lui l'élément de blocage (30) entre deux positions angulaires stables, une position passive dans laquelle l'élément de blocage (30) n'est pas en prise avec le dispositif d'arrêt (40) et autorise la rotation de la bobine et l'entraînement du rideau (4) de la fermeture, et une position active dans laquelle l'élément de blocage (30) est en prise avec le dispositif d'arrêt (40) et immobilise la bobine (2) et ledit rideau (4).Device according to claim 4, characterized in that the opening (32) provided in the disc (27) has the shape of an arc of a circle centered on the fixed axis (1) and extends over a substantially equal angular sector at said angle α in which said drive element (33) moves, driving with it the locking element (30) between two stable angular positions, a passive position in which the locking element (30) is not in engaged with the stop device (40) and authorizes the rotation of the coil and the drive of the curtain (4) of the closure, and an active position in which the locking element (30) is engaged with the device stop (40) and immobilizes the coil (2) and said curtain (4). Dispositif selon la revendication 2, caractérisé en ce que l'élément de blocage comporte un cliquet (30) et le dispositif d'arrêt comporte une roue à rochet (40).Device according to claim 2, characterized in that the locking element comprises a pawl (30) and the stop device comprises a ratchet wheel (40). Dispositif selon la revendication 2, caractérisé en ce que l'élément de rappel comporte un ressort (35) excentré par rapport audit doigt d'entraînement (33) et dont les extrémités sont reliées au disque (27) et à la pièce de liaison (38), ce ressort étant agencé pour équilibrer ladite position passive en fonctionnement normal et pour activer ladite position active en cas d'anomalie.Device according to claim 2, characterized in that the return element comprises a spring (35) eccentric with respect to said drive finger (33) and the ends of which are connected to the disc (27) and to the connecting piece ( 38), this spring being arranged to balance said passive position in normal operation and to activate said active position in the event of an anomaly. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de verrouillage (50) est prévu à l'intérieur de la bobine (2) et comporte un moyeu central (51) entourant partiellement l'axe fixe (1), ce moyeu étant constitué de deux parties, une première partie fixe appelée moyeu fixe (52) solidaire de l'axe fixe (1) et une seconde partie mobile appelée moyeu mobile (53) solidaire de l'extrémité intérieure du ressort d'équilibrage (3), le moyeu mobile (53) étant agencé pour pouvoir se déplacer par rapport au moyeu fixe (52) d'un secteur angulaire sensiblement égal à l'angle α, l'un des moyeux portant un élément de blocage mobile (60) agencé pour coopérer avec un dispositif d'arrêt (8) solidaire de la bobine (2).Device according to claim 1, characterized in that the locking device (50) is provided inside the coil (2) and comprises a central hub (51) partially surrounding the fixed axis (1), this hub being consisting of two parts, a first fixed part called the fixed hub (52) secured to the fixed axis (1) and a second movable part called the movable hub (53) secured to the inner end of the balancing spring (3), the movable hub (53) being arranged to be able to move relative to the fixed hub (52) by an angular sector substantially equal to the angle α, one of the hubs carrying a movable blocking element (60) arranged to cooperate with a stop device (8) integral with the coil (2). Dispositif selon la revendication 8, caractérisé en ce que l'élément de blocage mobile est constitué d'un cliquet (60) monté pivotant autour d'un axe A sur un flanc du moyeu fixe (52), l'axe A étant parallèle à l'axe fixe (1), ce cliquet étant agencé pour s'étendre au-delà du moyeu fixe, l'avant du cliquet étant destiné à coopérer avec le dispositif d'arrêt (8) de la bobine et l'arrière du cliquet étant couplé à l'élément de rappel (65).Device according to claim 8, characterized in that the movable blocking element consists of a pawl (60) pivotally mounted about an axis A on a side of the fixed hub (52), the axis A being parallel to the fixed axis (1), this pawl being arranged to extend beyond the fixed hub, the front of the pawl being intended to cooperate with the device d 'stop (8) of the coil and the rear of the pawl being coupled to the return element (65). Dispositif selon la revendication 9, caractérisé en ce que le dispositif de verrouillage (50) comporte un doigt de retenue (63) du cliquet (60), ce doigt de retenue étant prévu sur le moyeu mobile (53) et agencé pour s'engager dans un logement (64) correspondant prévu dans la partie avant du cliquet (60), la partie arrière du cliquet étant couplée au moyeu mobile (53) par ledit élément de rappel (65).Device according to claim 9, characterized in that the locking device (50) comprises a retaining finger (63) of the pawl (60), this retaining finger being provided on the movable hub (53) and arranged to engage in a corresponding housing (64) provided in the front part of the pawl (60), the rear part of the pawl being coupled to the movable hub (53) by said return element (65). Dispositif selon la revendication 10, caractérisé en ce que le moyeu mobile (53) est séparé du moyeu fixe (52) d'un jeu angulaire sensiblement égal à l'angle α définissant deux positions stables du moyeu mobile, une position passive dans laquelle le cliquet (60) est maintenu par le doigt de retenu (63), autorisant la rotation de la bobine (2) et le mouvement du rideau (4), et une position active dans laquelle le cliquet (60) est libéré du doigt de retenue (63), est pivoté par l'élément de rappel (65) et s'engage dans le dispositif d'arrêt (8) de la bobine, immobilisant la bobine (2) et le rideau (4).Device according to Claim 10, characterized in that the movable hub (53) is separated from the fixed hub (52) by an angular play substantially equal to the angle α defining two stable positions of the movable hub, a passive position in which the pawl (60) is held by the retaining finger (63), allowing the rotation of the spool (2) and the movement of the curtain (4), and an active position in which the pawl (60) is released from the retaining finger (63), is pivoted by the return element (65) and engages in the stop device (8) of the coil, immobilizing the coil (2) and the curtain (4). Dispositif selon la revendication 8, caractérisé en ce que les moyeux fixe (52) et mobile (53) comportent sur leurs faces en regard des formes complémentaires (52',53') agencées pour guider en rotation le moyeu mobile (53) par rapport au moyeu fixe (52).Device according to claim 8, characterized in that the fixed (52) and mobile (53) hubs have on their opposite faces complementary shapes (52 ', 53') arranged to guide the mobile hub (53) in rotation relative to to the fixed hub (52). Dispositif selon la revendication 9, caractérisé en ce que le dispositif d'arrêt de la bobine (2) est constitué par le boîtier de cette bobine, lequel comporte deux parois latérales (7) parallèles assemblées par des barrettes transversales (8) réparties à la périphérie de la bobine (2) et agencées pour servir de butée d'arrêt pour le cliquet (60).Device according to Claim 9, characterized in that the reel stop device (2) is constituted by the casing of this reel, which comprises two parallel side walls (7) assembled by transverse bars (8) distributed at the periphery of the coil (2) and arranged to serve as a stop for the pawl (60). Dispositif selon la revendication 9, caractérisé en ce que l'élément de rappel comporte un ressort (65) excentré par rapport au doigt de retenue (63) et dont les extrémités sont reliées au moyeu mobile (53) et à la partie arrière du cliquet (60), ce ressort étant agencé pour équilibrer ladite position passive en fonctionnement normal et pour activer ladite position active en cas d'anomalie.Device according to claim 9, characterized in that the return element comprises a spring (65) eccentric with respect to the retaining finger (63) and the ends of which are connected to the movable hub (53) and to the rear part of the pawl (60), this spring being arranged to balance said passive position in normal operation and to activate said active position in the event of an anomaly. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte un dispositif de déverrouillage (70) prévu sur au moins une des extrémités de l'axe fixe (1) et agencé pour autoriser le déroulement manuel du rideau (4) après l'actionnement du dispositif de verrouillage (20,50).Device according to claim 1, characterized in that it comprises an unlocking device (70) provided on at least one of the ends of the fixed axis (1) and arranged to authorize the manual unwinding of the curtain (4) after the actuation of the locking device (20.50). Dispositif selon la revendication 15, caractérisé en ce que le dispositif de déverrouillage (70) comporte au moins un manchon (71) de section non circulaire, monté à l'extrémité de l'axe fixe (1) et au moins un support (72) monté dans le bâti dormant portant ledit dispositif de fermeture, ce support comportant deux logements (73,74) placés côte à côte, ouverts vers le haut et communiquant entre eux, un premier logement (73) de section complémentaire à celle du manchon (71) correspondant à la position normale de l'axe fixe (1) en fonctionnement, et un second logement (74) de section circulaire correspondant à la position déverrouillée de l'axe fixe (1).Device according to claim 15, characterized in that the unlocking device (70) comprises at least one sleeve (71) of non-circular section, mounted at the end of the fixed axis (1) and at least one support (72 ) mounted in the standing frame carrying said closure device, this support comprising two housings (73,74) placed side by side, open upwards and communicating with each other, a first housing (73) of cross section complementary to that of the sleeve ( 71) corresponding to the normal position of the fixed axis (1) in operation, and a second housing (74) of circular section corresponding to the unlocked position of the fixed axis (1). Dispositif selon la revendication 16, caractérisé en ce que le dispositif de déverrouillage (70) comporte un organe de fermeture (75) desdits logements (73,74), cet organe étant démontable et agencé pour permettre le dégagement complet de l'axe fixe (1).Device according to claim 16, characterized in that the unlocking device (70) comprises a member (75) for closing said housings (73, 74), this member being removable and arranged to allow complete release of the fixed axis ( 1).
EP96440081A 1995-10-09 1996-10-09 Rolling closure device with fixed shaft, counterbalance spring and latching mechanism Expired - Lifetime EP0768445B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512069 1995-10-09
FR9512069A FR2739656B1 (en) 1995-10-09 1995-10-09 DEVICE FOR OPERATING A WINDING CLOSURE

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EP0768445A1 true EP0768445A1 (en) 1997-04-16
EP0768445B1 EP0768445B1 (en) 2001-01-10

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EP96440081A Expired - Lifetime EP0768445B1 (en) 1995-10-09 1996-10-09 Rolling closure device with fixed shaft, counterbalance spring and latching mechanism

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AT (1) ATE198635T1 (en)
DE (1) DE69611498D1 (en)
FR (1) FR2739656B1 (en)

Cited By (8)

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Publication number Priority date Publication date Assignee Title
FR2756319A1 (en) * 1996-11-28 1998-05-29 Javey Michel FALL PROTECTION DEVICE FOR VERTICALLY CLEARING CLOSURES
FR2772070A1 (en) * 1997-12-09 1999-06-11 Michel Javey RETAINER FOR WINDING CLOSURE
FR2783863A1 (en) 1998-09-25 2000-03-31 Michel Javey FIXING DEVICE FOR FIXED SHAFT CURTAIN WITH ROLL-UP CLOSURE
EP1030028A1 (en) * 1999-02-19 2000-08-23 Profilmar Fall protection device for a vertically movable closure
FR2793837A1 (en) 1999-05-21 2000-11-24 France Fermetures Anti-collapse safety closing mechanism for vertical metallic shutters does not interfere with complete closing of shutter as user can pull shutter so as to overcome friction forces on ring by flanges
FR2875838A1 (en) 2004-09-30 2006-03-31 Profilmar Sa Spring box for vertically displaceable rolling shutter, has snap fastener blocking rotation of outer flange during breaking of spring whose curved end is enclosed by prongs in slits arranged in rims of inner flanges
GB2428758A (en) * 2005-07-26 2007-02-07 Alan Paul Young Roller shutter braking mechanism
EP2017431A2 (en) 2007-07-20 2009-01-21 Profilmar Spring box with anti-fall device for vertical roller shutter fitted with a safety device, and corresponding safety elements

Families Citing this family (2)

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FR2826688B1 (en) 2001-06-28 2004-01-23 Bmj ANTI-FALL DEVICE FOR A WINDING CLOSURE
CN114909075A (en) * 2022-04-06 2022-08-16 揭阳市快意门业有限公司 But automatically controlled shutter door of remote control's garage with self-locking mechanism

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756319A1 (en) * 1996-11-28 1998-05-29 Javey Michel FALL PROTECTION DEVICE FOR VERTICALLY CLEARING CLOSURES
EP0845575A1 (en) * 1996-11-28 1998-06-03 Michel Javey Anti-fall device for vertically retractable closures
FR2772070A1 (en) * 1997-12-09 1999-06-11 Michel Javey RETAINER FOR WINDING CLOSURE
EP0922832A1 (en) * 1997-12-09 1999-06-16 Michel Javey Catching device for rollable closing devices
FR2783863A1 (en) 1998-09-25 2000-03-31 Michel Javey FIXING DEVICE FOR FIXED SHAFT CURTAIN WITH ROLL-UP CLOSURE
EP1030028A1 (en) * 1999-02-19 2000-08-23 Profilmar Fall protection device for a vertically movable closure
FR2790033A1 (en) * 1999-02-19 2000-08-25 Profilmar FALL PROTECTION DEVICE FOR VERTICALLY MOVING CLOSURE
FR2793837A1 (en) 1999-05-21 2000-11-24 France Fermetures Anti-collapse safety closing mechanism for vertical metallic shutters does not interfere with complete closing of shutter as user can pull shutter so as to overcome friction forces on ring by flanges
FR2875838A1 (en) 2004-09-30 2006-03-31 Profilmar Sa Spring box for vertically displaceable rolling shutter, has snap fastener blocking rotation of outer flange during breaking of spring whose curved end is enclosed by prongs in slits arranged in rims of inner flanges
GB2428758A (en) * 2005-07-26 2007-02-07 Alan Paul Young Roller shutter braking mechanism
EP1748146A3 (en) * 2005-07-26 2007-11-28 Alan Paul Young Roller shutter braking mechanism
GB2428758B (en) * 2005-07-26 2008-01-16 Alan Paul Young Roller shutter braking mechanism
EP2017431A2 (en) 2007-07-20 2009-01-21 Profilmar Spring box with anti-fall device for vertical roller shutter fitted with a safety device, and corresponding safety elements

Also Published As

Publication number Publication date
EP0768445B1 (en) 2001-01-10
ATE198635T1 (en) 2001-01-15
FR2739656A1 (en) 1997-04-11
DE69611498D1 (en) 2001-02-15
FR2739656B1 (en) 1997-11-21

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