EP1031689A1 - Control system for a door with an antipanic push bar of the active locking type - Google Patents

Abstract

The door command comprises an electromagnetic switch (40) and a series of connection levers (45,46,47) that are articulated to one another. Pressure on the push bar mechanism, activates the lever assemblies such that the electromagnetic switch unit is activated. This causes a signal to be sent either to a central monitoring station or to sound an alarm.

Description

The invention relates to a door bar control device push of the type allowing the control of a lock mechanism specific to the control of a door leaf from a room normally open to the public, including an emergency exit.

The invention relates more particularly to a locking system active of such a control device, capable of opposing the movement of the grab bar.

The invention also relates to an active locking module for door, comprising an electromagnet which will be designated hereinafter "suction cup electromagnetic ", capable of fitting a door control device to push bar, including a device not originally fitted.

We know a door control device with push bar anti-panic type, with active condemnation, commonly called "push-bar" which has a support suitable for being applied and fixed against the door leaf equip and a support bar mounted mobile on this support and capable of sinking movement in relation to it, when it is the object of a push request. Pressing the grab bar causes actuation of the lock mechanism and opening of the door. Such device is for example described in patent document No. 87.14 815 belonging to the plaintiff.

It is recalled that a panic closing device, in a way general purpose is to always be able to leave a room in case emergency; it generally equips a door which opens towards outside, in pushing.

It is however desirable that such a device is not unduly can be operated from the inside, either for an uncontrolled exit or for an entry fraudulent favored by a colleague who has already entered the premises concerned.

This is why it has been proposed to equip the control devices with push bar of an active lock controlled by a suction cup suitable for opposing the depression of the support bar. Normally, the active locking is permanently in service by supplying the suction cup and this condemnation disappears only in case of power failure ordered by a duly authorized person.

The invention relates more particularly to the arrangement of the means of blocking of the bar, integrated into the support fixed to the door, these means being optimized to reduce the suction cup power required to maintain locking the door to a predetermined maximum thrust exerted on the grab bar.

More particularly, the invention relates to a device for controlling door with push bar, anti-panic, of the type with active locking, comprising a support suitable for being fixed against a door leaf, a bar bearing mounted mobile on said support and capable of movement sinking relative thereto in response to a push request and means for immobilizing said bar comprising a mechanism for locking, articulated, interposed between said support and said bar, a suction cup electromagnetic and a locking part whose displacement is controlled by a movable element coupled to said suction cup and which is susceptible, in a predetermined position given to it by said suction cup, to maintain said locking mechanism in a position preventing said driving movement of said bar, characterized in that said locking mechanism comprises a chain of three links articulated end-to-end, in that the two ends of said chain are articulated to said support by two journals of fixed axes while the rods are connected to each other by articulations of free axes, one of them carrying a locking stop cooperating with said locking piece and the other carrying a support stop cooperating with said support bar.

The structure of the locking mechanism which has just been defined makes it possible to multiply at will the effort exerted on the support bar brought back to said element mobile forming a polar plate. The geometry of this locking mechanism, in the position it occupies when the bar is not pressed, allows determine the ratio between the force that the suction cup must exert on the stopper locking and pushing which must be exerted on the grab bar to force opening the door when the suction cup is supplied.

According to another remarkable characteristic of the invention, the stroke of the movable element or pole plate, is very weak and relatively straight, this thanks to a guide mechanism defining the path of said element mobile. This results in the possibility of using said suction cup as a operation of the pole plate to move the mechanism to the position of locking then maintain it, without other means, in this position.

The invention also relates to an active locking module for fitting a push bar door control device genre defined above. Such an active condemnation module arranged in a support which can take place in a bar door control device thrust that is not originally equipped with it is characterized in that it includes an articulated locking mechanism, an electromagnetic lock and a locking piece whose movement is controlled by an element mobile coupled to said suction cup and which is capable, in a position given to it by said suction cup, to maintain said locking mechanism in a predetermined position, in that said blocking mechanism comprises a chain of three rods articulated end-to-end, in that the two ends of said chain are articulated to said support by two trunnions of fixed axes while the rods are attached between them by articulations of free axes, one of them carrying a stop of locking device cooperating with said locking piece and the other carrying a support stop.

Depending on the case, the word support above, can designate an element of the door control device or an element of said module itself mounted or called to be mounted on the door control device.

• la figure 1 est une vue générale schématique d'une porte équipée d'un dispositif de commande à barre de poussée, à condamnation active ;
• la figure 2 est une vue schématique en perspective éclatée du dispositif de commande ;
• la figure 3 est une vue de détail à plus grande échelle, en élévation et en coupe d'un module de condamnation active équipant le dispositif de commande de la figure 1 dans la position qu'il occupe lorsque la barre d'appui est au repos et que la condamnation active n'est pas actionnée ;
• la figure 4 est une vue analogue à la figure 3 illustrant la position des éléments lorsque la barre d'appui n'est pas actionnée mais que la condamnation active est engagée ;
• la figure 5 est une vue analogue à la figure 3 illustrant la position des éléments lorsque la barre d'appui est enfoncée ;
• la figure 6 est une vue de dessus de la figure 5 ; et
• la figure 7 est une vue schématique du mécanisme de blocage, illustrant les efforts mis en jeu.

The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a push bar door control device in accordance with its principle, given solely by way of example and made with reference to the accompanying drawings in which:

• Figure 1 is a general schematic view of a door equipped with a push bar control device, active locking;
• Figure 2 is a schematic exploded perspective view of the control device;
• Figure 3 is a detail view on a larger scale, in elevation and in section of an active locking module fitted to the control device of Figure 1 in the position it occupies when the grab bar is at rest and that the active condemnation is not activated;
• Figure 4 is a view similar to Figure 3 illustrating the position of the elements when the grab bar is not actuated but the active locking is engaged;
• Figure 5 is a view similar to Figure 3 illustrating the position of the elements when the support bar is pressed;
• Figure 6 is a top view of Figure 5; and
• Figure 7 is a schematic view of the locking mechanism, illustrating the forces involved.

Referring more particularly to Figures 1 and 2, there is shown a door control device with push bar 10, anti-panic, mounted on the leaf of a door 11. This device controls a lock or other locking mechanism of the door which is here arranged in the shelter of a trunk 12 fixed on the leaf. This mechanism is itself connected by means of transmission rods 13 a , 13 b to top and bottom bolts 14 a , 14 b fixed to the leaf. Alternatively, the mechanism may have only one central bolt. The push bar door control device 10 conventionally extends transversely with respect to the door leaf between the boot 12 and an end cover 15 which is also fixed to said leaf. It comprises a support 18 formed from a metal U-shaped section, intended to be fixed against the door leaf and a support bar 20 mounted movably on the support and capable of a driving movement relative to this in response to a thrust stress exerted at any point of the bar. It is also made up of a metal profile with a U-shaped cross-section, the concavity of which is turned towards that of the support. The spacing of the two parallel lateral wings of the profile constituting the support bar 20 is here less than that of the two parallel wings of the profile constituting the support 18 so that said support bar can, when it is stressed, s' press inside the support.

The support bar 20 and the support 18 are linked to each other by two guide modules 22 installed inside the section support 18 transverse in U. The guide modules 22 define the trajectory of the support bar in relation to the support. Said support bar is articulated to them. Each guide module 22 is itself arranged inside a section of metal profile 23 with generally U-shaped section. It comprises a transverse roller 24 movable in two lights 26 parallel and at about 45 ° of the plane of the door, made in the two parallel lateral flanges of this section of profile. The roller is extended axially, outside said flanges but inside the support by cylindrical pins 28 attached to the grab bar. The roller is biased by a spring 30 towards the outside of the base formed by said section of metal profile.

In the example shown, there are two guide modules 22 located near the ends of the support for the grab bar. It is clear that the rollers 24 thus biased towards the outside of the support 18 are susceptible to move aside the support bar 20 thereof while defining for the latter a predetermined sinking stroke. As the lights 26 enters which move the rollers are at an angle to the direction longitudinal of the support 18, the depression of the support bar results in a longitudinal displacement thereof, suitable for actuating the door lock (or lock).

The door control device is also equipped with means immobilization 34 of said support bar. These immobilization means are installed in an active locking module 35 also fixed to the bottom of the support 18, for example in place of a pre-existing guide module. The active locking module 35 is also arranged on a base 36 comprising a base plate 36a fixed to the support 18 and two flanges parallel side 36b between which are installed, in particular, trunnions forming part of the immobilization means in question. The module active locking also houses a guide module 22 constituted, as the other two, of a transverse roller 24 movable in parallel slots 26 made in the lateral flanges 36b of the base 36. This roller is extended axially outside the flanges by studs attached to the grab bar and the roller is biased towards the outside of said base (and therefore support) by a spring 30.

The immobilization means 34 of the support bar comprise a locking mechanism 38 which will be described later, articulated, interposed between said support (more particularly said base 36 and said support bar 20), a suction cup 40 and a locking piece 42 whose movement is controlled by a movable element 44 of said suction cup. Locking piece 42 is susceptible, in a predetermined position given to it by said suction cup, to hold the locking mechanism 34 in a position preventing the driving movement of the support bar 20.

According to a remarkable characteristic of the invention, the mechanism of blocking 38 comprises a chain of links 45, 46, 47 articulated end-to-end. In the example, the chain has three links. The two ends of said chain are articulated to the support (in fact to the flanges 36b of the base) by two pins 48, 49 with fixed axes, while the connecting rods are attached between them by joints 52, 53 of free axes. A free axis joint 52 carries a locking stop 56 cooperating with said piece of locking and the other articulation 53 carries a support stop 58 in contact with said grab bar. The geometry and kinematics of the locking mechanism are such that in a position of it that corresponds to a position not pressed in of said bar (FIGS. 3 and 4), the force to be exerted on the stop of lock 56 to contain a driving force applied to the stop support 58 is multiplied by a value depending on said geometry of the link mechanism in this position.

As shown in Figures 3 to 6, the links of said chain are arranged approximately in "zig-zag" and, in the standby position of the support bar (that is to say the position not pressed ) the two end links 45, 47 of said chain make a small angle relative to a direction of the driving force indicated by the arrow F ₁ in the drawings.

The support stop and the locking stop are respectively formed by cylindrical rollers. The axis of rotation of the roller constituting the support stop 58 is coincident with that of the free-axis joint which carries it. Similarly, the axis of rotation of the roller constituting the locking stop 56 is confused with that of the articulation of free axis which carries it.

The link 45 is a link with several parallel branches forming a kind of yoke for the roller constituting the locking stop 56. It extends between the pin pin 48 mounted between the parallel flange lights of the base and the free-axis joint 52 which connects it to the central link 46 of the chain. The articulation 52 is materialized by an axis on which the roller is mounted rotating, said axis extending between two branches of the link 45.

The other end link 47 of the chain is a twin link comprising two parallel branches joined by a transverse bridge 47 a . This twin link is articulated to the two flanges 36 b of the base (that is to say to the support itself) by the journal with a fixed axis 49, transverse, located closer to the bottom of the base than the pin 48 which carries the link 45. On the other hand, in the vicinity of the longitudinal opening of the support, the twin link 47 carries a free-axis joint 53 by which it is connected to the central link 46. The roller 58 constituting the stop support is mounted in free rotation on this axis. It is in contact with the inner face of the support bar 20. A pin spring 60 is installed between the bottom of the base and the transverse bridge 47 a connecting the two branches of the twin link 47. It is wound around the journal 49. This spring therefore urges the support stop 58, that is to say the roller, towards the outside of the support, that is to say towards the support bar to maintain contact between the roller and the inner face of said support bar.

Furthermore, the suction cup 40 is mounted on the base 36. It is more particularly fixed on a metal part 65 bent in L, fixed to the base so that the axis of the coil 40 a of the suction cup is arranged in bias, longitudinally relative to the support 18. The coil cooperates with the movable element 44 of the suction cup, comprising a kind of pole plate 44 a made of soft iron. This pole plate defines with the coil a variable gap area 64. This gap therefore defines the stroke of said movable element 44 and this stroke is extremely reduced. Consequently, said coil can exert on the movable element forming the pole plate 44 has a relatively large restoring force, all other things being equal. In addition, the movable element 44 is linked to a guide mechanism 66 imposing on it an approximately rectilinear trajectory. More specifically, the movable element 44 comprises a yoke and a flat link 67 is fixed to the side of this yoke. It has an oblong hole 68 in which engages a fixed rod 70 secured to the support, more precisely mounted between the two lateral flanges 36 b of the base. The guide mechanism is completed by a tension spring 72 mounted between the movable element 44 and a fixed anchoring point of the support, here the rod 70. This guide mechanism therefore limits the pivoting between the surface of the pole plate 44 a and the end face 75, facing the coil 40 a . Said pole plate therefore no longer risks being applied at an angle to the end face of the coil, which would result in poor "sticking" of the pole plate and therefore a defective active locking.

The locking piece 42 mentioned above is installed between the yoke of the movable element 44 of said suction cup and the roller constituting said locking piece 56 of the locking mechanism 38. It is a flat piece pivotally mounted around a fixed axis 74 installed between the two flanges 36b of the base. It has an articulated extension to the yoke of the movable element (axis 76). The suction cup 40 therefore transforms this locking piece into a kind of pivoting lever. Said locking piece 42 includes a hook part 78 cooperating with the locking stop 56, that is to say in contact with the latter, in a position suitable for immobilizing it (FIG. 4), when the bar d 'support is not pressed and when the movable member 44 of the suction cup is applied against the end face 75 of the coil, as illustrated in Figure 4. It is clear that when the system is in the situation illustrated in Figure 4, said locking mechanism 38 is practically blocked by immobilization of the stop 56 and that the support bar can not be pressed into the support.

In addition, the locking piece 42 has a part in an arc 80 extending the hook part. The center of this semicircle is substantially on the axis of the journal of fixed axis 48 on which the rod 45 pivots of the chain carrying the locking stop 56. The latter remains in contact with the part in a semicircle in case of depression of the support bar, as shown in Figure 5.

It is clear from the foregoing description that all the elements of the active locking means are grouped together on the base 36 consisting of the base plate 36 a and the two lateral flanges 36 b . This base is itself fixed to the support 18. This allows the active locking system to be installed in the structure of a push bar door control device not originally equipped with such an active locking system. The base can advantageously take the place of one of the guide modules and be fixed to the support using the same holes provided for mounting the eliminated guide module. It should be noted that the base itself comprises a guide module independent of the active locking means. Conversely, all the elements which have just been described could be arranged directly inside the support 18.

F :

Force de retenue exercée par la pièce de verrouillage 42 sur la butée 56 ;

F₁ :

Force exercée sur la barre d'appui ;

F₂ :

Force de retenue exercée par la ventouse sur la plaque polaire 44a ;

D₁ :

Longueur de la projection de l'axe fixe 49 sur la direction d'enfoncement F₁ passant par la butée 58 en contact avec la barre d'appui ;

D₂ :

Longueur de la projection de l'axe 49 sur la droite joignant les deux articulations d'axes libres 52 et 53 ;

D₃ :

Longueur de la projection de l'autre axe fixe 48 sur la direction de F;

D₄ :

Longueur de la projection de cet autre axe fixe 48 sur la droite joignant les deux articulations d'axes libres 52 et 53 ;

D₅ :

Longueur de la projection de l'axe 74 sur la direction de F;

D₆ :

Longueur de la projection de l'axe 74 sur la direction de F₂ .

On démontre que F 2= F 1 D 1.D 4.D 5 D 2.D 3.D 6 The operation of the active locking control device which has just been described is very simple and follows clearly from the preceding description. To understand the forces involved and the behavior of the linkage mechanism, reference can be made to the diagram in FIG. 7 which represents the rods 45, 46, 47 in the positions which they occupy when the grab bar is not not depressed and that the locking stop is immobilized by the tilting of the hook 78 of the locking piece 42, when the pole piece 44 a is in contact with the end of the coil 40 a . Under these conditions, the following forces and distances are defined:

F:

Retaining force exerted by the locking piece 42 on the stop 56;

F ₁ :

Force exerted on the grab bar;

F ₂ :

Holding force exerted by the suction cup on the pole plate 44 a ;

D ₁ :

Length of the projection of the fixed axis 49 on the driving direction F ₁ passing through the stop 58 in contact with the support bar;

D ₂ :

Length of the projection of the axis 49 on the right joining the two articulations of free axes 52 and 53;

D ₃ :

Length of the projection of the other fixed axis 48 on the direction of F;

D ₄ :

Length of the projection of this other fixed axis 48 on the right joining the two articulations of free axes 52 and 53;

D ₅ :

Length of the projection of axis 74 on the direction of F;

D ₆ :

Length of the projection of axis 74 on the direction of F ₂ .

We show that F 2 = F 1 D 1 . D 4 . D 5 D 2 . D 3 . D 6

It is understood that the force F ₁ necessary to overcome F ₂ depends entirely on the geometry of the locking mechanism 38 in this position and in particular on the products D ₁ .D ₄ .D ₅ and D ₂ .D ₃ .D ₆ . The lengths D ₁ , D ₄ and D ₅ being notably and visibly shorter than the lengths D ₂ , D ₃ and D ₆ , it is understood that the retaining force which the suction cup must develop is relatively moderate, all other things being equal . A ratio of about 1 to 40 is obtained in three stages of reduction with simple parts to be made, of cut metal, because these parts all work in traction. The suction cup can therefore be fitted with a coil consuming relatively little electricity and of small dimensions. The system is also relatively compact. In addition, as mentioned above, the stroke of the pole plate 44 a ensuring the blocking is very small and relatively well controlled. The force that the suction cup must develop is stable and reliable.

Claims (16)

Door control device with push bar, anti-panic, type with active locking, comprising a support (18) suitable for being fixed against a door leaf, a support bar (20) movably mounted on said support and susceptible to a sinking movement relative thereto in response to a thrust request and immobilization means (34) of said bar comprising a locking mechanism (38), articulated, interposed between said support and said bar, an electromagnetic suction cup and a piece of locking whose movement is controlled by a mobile element coupled to said suction cup and which is susceptible, in a predetermined position which is given by said suction cup, to maintain said locking mechanism in a position preventing said driving movement of said bar (20), characterized in that said locking mechanism comprises a chain of rods (45, 46, 47) hinged end-to-end, in that the two ends of said chain are articulated to said support by two journals of fixed axes (48, 49) while the connecting rods are connected together by articulations free axes (52, 53), one of them carrying a locking stop (56) cooperating with said locking part and the other carrying a support stop (58) cooperating with said support bar. Device according to claim 1, characterized in that the geometry and the kinematics of said locking mechanism (38) are such that, in a position of the latter which corresponds to an unpressed position of said bar, the effort to be exerted on said locking stop to contain an effort driving force applied to said abutment stop (58) is multiplied by a value depending on said geometry of the link mechanism, in this position. Device according to claim 2, characterized in that said links of said chain are arranged approximately in "zig zag" and what the two end links of these make an angle with respect to a direction of the digging effort. Device according to one of the preceding claims, characterized in that that said support stop (58) is a roller. Device according to one of the preceding claims, characterized in that that said locking stop (56) is a roller. Device according to claim 4 or 5, characterized in that the axis of rotation of such a roller is confused with that of the free-axis joint which door. Device according to one of the preceding claims, characterized in that that said locking piece (42) has a hook part (78), cooperating with said locking stop. Device according to claim 7, characterized in that said part forming a hook is extended by a semi-circular part (80) whose center is located substantially on the axis of the fixed axis journal on which the said pivot end link carrying said locking stop, the latter remaining in contact with this part in an arc in the event of depression of said bar support. Device according to one of the preceding claims, characterized in that that said locking piece (42) is pivotally mounted on said support by a journal with a fixed axis and in that it includes an extension articulated to said mobile element (44) coupled to said suction cup. Device according to one of the preceding claims, characterized in that the movable element (44) coupled to said suction cup comprises a plate mobile polar defining with a coil a variable airgap zone and in this that it is linked to a guide mechanism (66) imposing on it a trajectory approximately straight. Device according to claim 10, characterized in that said guide mechanism (66) comprises a link (67) fixed to said element mobile, in that this link has an oblong hole (68) in which engages a fixed rod integral with said support and in that said mechanism guide further comprises a spring (72) mounted between said movable member and a fixed anchor point of said support, such as for example said fixed rod. Device according to one of the preceding claims, characterized in that said support being a U-shaped profile, it houses a locking module door active grouping together the aforementioned elements of said means immobilization (34) of the bar. Device according to claim 12, characterized in that said module comprises a base comprising a base plate (36 a ) fixed to said support and two lateral flanges (36 b ) parallel between which trunnions of aforementioned fixed axis are installed. Device according to claim 13, characterized in that said module further comprises a transverse roller (24) movable in lights parallels formed in said lateral flanges, said roller being extended axially outside of said flanges by tenons (28) attached to said grab bar and in that said roller is biased by a spring towards the outside of said base. Device according to claim 14, characterized in that, so known per se, said support bar (20) is a U-shaped profile of opposite concavity to that of the profile constituting said support and in that said support bar is shaped and / or arranged to sink inside the profile constituting said support. Active door locking module to equip a control according to one of the preceding claims, characterized in that it includes, in a support, a locking mechanism, articulated, a suction cup electromagnetic (40) and a locking piece (42) whose displacement is controlled by a movable element coupled to said suction cup and which is susceptible, in a predetermined position given to it by said suction cup, to maintain said locking mechanism in a position predetermined, in that said locking mechanism comprises a chain of rods (45, 46, 47) hinged end-to-end, in that the two ends of said chain are articulated to said support by two journals of fixed axes while that the rods are connected together by articulations of free axes, one of them carrying a locking stop cooperating with said piece of locking and the other carrying a support stop.

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