FR2652375A1 - Safety lock - Google Patents

Abstract

Safety lock, comprising a keeper casing (2) and a bolt casing (1), comprising a first transverse locking bolt (5) capable of closing and blocking the door during closure of the premises to the public, this bolt being slidingly mounted and actuated by the plunger of a first electromagnet (16) mounted in this casing and remotely controlled. According to the invention, this lock is characterised in that it includes a second bolt (6), of dog shape, carried by a transverse tilting spindle (12) journalled in the casing such that, in the closed position of the door, the bolt (6) with tilting spindle bears on a removable shear pin (9) carried by the keeper casing, a locking lever (18) for immobilising the bolt, in its position of bearing on the pin, this lever being articulated on a pivoting spindle (19) parallel to the spindle of the bolt and actuated against a return spring (25) by the plunger (22) of a second electromagnet (17), and means (10-51) for retracting and immobilising the bolt (6) during opening of the door, consecutively to withdrawal of the locking lever towards the inside of the bolt casing, as long as the door has not been reclosed.

Description

 The present invention relates to a security lock, intended in particular for the electromagnetic locking of doors or other emergency exits for buildings, shops, meeting rooms or similar premises, intended to receive the public and for which the operation of the lock must in particular to meet usage requirements defined by various regulations, compliance with which is strictly required.

 The invention relates in particular to a security lock which must make it possible, on the one hand, to effectively close the premises when the latter is prohibited to the public, for example during night hours, cleaning or maintenance schedules. , the weekly or annual closing periods etc ..., in order to avoid any unauthorized intrusion inside this room, which can only occur following an offense which must then be immediately detected, and on the other hand to ensure that the door is kept in the closed position in front of the emergency exits when the public is inside the room, but this time under conditions which allow it to be opened quickly and safely, following a strong push on the door, to allow emergency evacuation of people in the event of an incident, the lock also being provided with means allowing direct and immediate detection of such an opening, in particular by warning a station guard or surveillance of the entire premises.

 The invention therefore relates to a security lock which meets the requirements thus formulated, while also being easy to maintain, having excellent reliability and great robustness, requiring only minimal maintenance and having a reasonable cost price.

 To this end, the lock considered, comprising a strike box fixed for the door frame and a bolt box, fixed on the leaf, comprising a first transverse locking bolt, capable of closing and blocking the door during closing of the premises to the public, this bolt being slidably mounted in a guide passage provided in the bolt box and actuated by the pusher of a first electromagnet mounted in this box and controlled remotely, in order to be able to engage in a housing arranged opposite in the strike box to immobilize the door, is characterized in that it comprises, also mounted in the bolt box, a second bolt, in the shape of a dog, carried by a tilting transverse axis, perpendicular to the plane of the bolt and swiveling in the housing so that, in the closed position of the door, the bolt with tilting axis is supported on a removable shear pin carried by the box ier of strikes, a locking lever to immobilize the bolt with tilting axis in its position of support on the pin, this lever also being articulated on a pivot axis parallel to the axis of the bolt and actuated against a return spring by the pusher of a second electromagnet, housed with the first in the bolt box and controlled remotely, and means for erasing and immobilizing the bolt with tilting axis when the door is opened, following the withdrawal of the locking lever towards the inside of the bolt box as long as the door is not closed.

 Thanks to these provisions, the proposed security lock allows, during periods when the room is prohibited to the public, on the one hand to lock the door by the first bolt operating in a conventional manner as in any other electromagnetic control lock where, depending on the case, the displacement of the bolt in the open or closed position, with release or engagement of the latter in its keeper is obtained by means of an electromagnet, possibly controlled and actuated remotely. , when the room receives the public, the first bolt being in the inactive position, that is to say out of its strike, the door is still kept closed but this time using the second bolt, mounted on a tilting axis so as to come into abutment on the safety pin by blocking the door, the pin being able to be sheared by the bolt itself following a sufficient push exerted on the door.

 Thus, in the event of an incident inside the premises, possibly causing a start of panic among the people present in it, the door can be immediately opened by breaking the pin and releasing the bolt, releasing the door. Of course, the tilting bolt can itself be controlled remotely at any time by means of the second electromagnet, so that the door can then be opened on demand, without it being necessary on this occasion to break the pin.

 Advantageously and according to another characteristic of the invention, the locking lever of the bolt with tilting axis has an open L-shaped profile, one first branch of which is articulated around its pivot axis and the other of which cooperates with the end of the pusher of the second electromagnet so that the latter applies the lever against the bolt, blocking the latter in the closed position of the door by pressing on the shear pin.

 Preferably, the first branch of the locking lever has a V-shaped projection, capable of engaging in a notch of the same profile formed hollow in the bolt with tilting axis, in order to perfect the immobilization of the latter in position d 'support on the shear pin.

 According to another characteristic of the invention, the bolt with tilting axis pivots through a recess made in a plate or partition closing the bolt box, provided facing the strike box, this bolt being secured to its pivot axis by means of a transverse connecting key.

Advantageously, the bolt comprises, to limit its movement, a stop pin, carried by the bolt and arranged to come up against the partition closing the housing from the inside thereof.

 According to yet another characteristic of the invention, the means for erasing the bolt in the bolt box consist of an eclipsable finger, slidingly mounted in a socket, secured to the box, this finger being able to cooperate with a flat, provided on the latch pivot axis. Under these conditions, when the finger is pressed into its socket, it releases its flat face from the axis, allowing the latter to rotate in the housing in order to produce the tilting of the bolt, the latter remaining in revenge blocked in rotation and erased inside the housing when the finger protrudes from its socket towards the outside of the housing, in particular in the open position of the door.

 Advantageously, the strike box has, opposite the eclipsable finger, an inclined ramp so that, when the door is closed, this ramp causes the finger to slide progressively in its socket, by allowing the latch to tilt under the effect of a spring bringing the bolt into a position where it receives the locking lever actuated by the pusher of the second electromagnet.

 According to another additional characteristic of the lock considered, the shear pin comprises a cylindrical body, having two localized zones of weakness, spaced from one another and delimiting between them a part of the body disposed transversely in an open housing of the strike box, housing into which the latch bolt penetrates when the door is closed.

 Preferably, the cylindrical body of the pin is mounted in a transverse bore of the strike housing, being stopped at one end by a circlip or the like and projecting from the housing at the other end, the latter being provided with a head forming a support stop for a spring for ejecting the pin, following the breaking of the latter under the effect of the bolt with tilting axis, causing the rapid emergency opening of the door. Usefully, the head of the pin is arranged under a protective cover, carried by the strike box, to avoid sudden projection of the head under the effect of the ejection spring.

 Finally, the lock according to the invention preferably comprises a set of micro-contactors, mounted respectively in the boxes of bolts and strikes, to control the position of the pushers of the electromagnets, the presence or absence of the first bolt in its housing, the support of the bolt with tilting axis on the shear pin or the erasure of this bolt in the housing, and the presence of the pin in its bore. Advantageously, the lock can also be associated with a separate box, in particular of the "glass breakage" type, preferably installed in the immediate vicinity of the door and adapted to directly cut the power supply to the second electromagnet, thereby releasing the lever. locking and allowing the erasure of the bolt with tilting axis and the opening of the door, without requiring the breaking of the pin.

Other characteristics of a security lock established in accordance with the invention will become apparent from the following description of an exemplary embodiment, given by way of non-limiting example, with reference to the appended drawings in which
- Figures 1 and 2 illustrate very schematically the mounting of the lock considered on the opening and the frame of a door or the like, in order to ensure the closure or allow the opening in the special conditions for its use, in particular as a lock for an emergency exit from a door of a room open to the public.

 - Figure 3 is a partial sectional view of the lock, illustrating the relative position of the two bolts thereof.

 - Figures 4 and 5 are also cross-sectional views, showing more specifically the structure of the bolt with tilting axis, its locking lever and the control means thereof.

 - Figure 6 is a sectional view on a larger scale, by a plane perpendicular to that of the views of Figures 4 and 5, illustrating more particularly the detail of the structure of the shear pin associated with the bolt with tilting axis.

 - Figure 7 illustrates, also on a larger scale, the eclipsable finger, blocking or allowing the pivoting of the tilting axis.

 - Figures 8 and 9 are more schematic views to better understand the operation of the eclipsable finger.

 - Figure 10 is a sectional view through a plane perpendicular to that of Figures 4 and 6 respectively, illustrating more particularly the detail of the mounting of the tilting axis.

 As shown schematically in Figures 1 and 2, the lock considered mainly consists of a bolt box 1 and a strike box 2, these boxes in themselves usual being respectively mounted on the leaf 3 and the frame 4 of a door and in particular of an emergency exit door for a building or a room intended to receive the public. The door is normally closed, either during the closing periods of this room, where the public is not admitted into it, its opening can only be achieved by command, possibly remotely, of a mechanism releasing one or several locking bolts, in particular during periods when people are inside the room, the door must then be able to be opened in the event of an incident as a result of sufficient push on it, in order to allow the rapid evacuation of the public.

 To this end, the lock considered comprises two bolts, respectively 5 and 6, mounted in the housing 1, the first 5 being provided to cooperate with a keeper 7 of the housing 2 in order to ensure the ordinary closing of the door, while the second 6, is arranged to be able to penetrate into a housing 8 of the housing 2, coming to block the door in the closed position, by resting on a shear pin 9, capable of breaking by releasing the bolt and allowing the movement of the door, in particular when the latter must be ordered for a rapid emergency opening. In the vicinity of the bolt 6, the housing 1 also includes an eclipsable finger 10, adapted to cooperate with a ramp 11 provided on the strike housing 2, during movements of the door, when opening or closing, the mounting of this finger as will be explained in more detail later, being provided so that it keeps the bolt 6 erased insideof the housing 1 when the finger protrudes outside this housing (Figure 1) on the occasion of the controlled opening of the door and that, on the contrary, it authorizes the pivoting of the bolt 6 in the housing 8 to come to the contact of the pin 9 when the door is closed, when it is itself retracted in the housing 1 under the effect of the ramp 11. In FIG. 2, the bolt 6 has been shown in the projecting position that it occupies when, following a sudden push on the door, the latter is opened, following the breaking of the pin 9.

Figure 3 shows the relative position of the bolts 5 and 6 of the housing 1 and their respective profiles. The bolt 5 is preferably in the form of a simple bolt, here cylindrical, but which could be parallelepipedal or other, like the conventional bolt bolts. The second bolt 6, on the other hand, has a hook or dog shape in cross section, the curvature of which is adapted in order to ensure proper support on the shear pin 9 when this bolt 6 ensures the closing of the door, in particular when the room closed by it, contains the public. The bolt 6 is carried by a tilting pin 12, the details of which appear more clearly in FIG. 10, this pin being mounted in a swivel arrangement in an appropriate bore of a closing plate or partition 13 of the bolt box 1, provided on this Ci opposite the strike box 2.The bolt 6, in the position shown on the
Figure 3 where it projects outward to engage in the housing 8 of the housing 2, is brought into abutment against the plate 13 and the pin 9 by means of a pin 14, integral with the bolt. Finally in the plate 13 is provided a guide passage 15 for the first bolt 5, the control thereof inside the housing i to allow> through the passage 15, its engagement or withdrawal vis-à-vis the keeper 7 of the housing 2, being provided by means of a first electromagnet 16 also very schematically shown in the Figure. The connection between this and the bolt 5 can be achieved by any suitable conventional transmission means (not shown here so as not to overload the drawing).

 Similarly, the bolt 6 with its tilting axis 12 is controlled by a second electromagnet 17, housed like the electromagnet 16, in the housing 1 but acting on the bolt by means of a lever locking device 18, L-shaped, wide open and articulated around a transverse axis 19 on the plate 13.

 Figures 4 and 5 make it possible to explain more fully the manner in which the control of the tilting of the axis 12 is effected by the locking lever 18. The latter comprises a first branch 20, of shorter length, articulated at one end on the axis 19 and a second branch 21, intended to cooperate with a pusher 22, actuated by the electromagnet 17. On the opposite side the pusher 22 comprises a stubborn 23+ acting on the arm of a microswitch 24 so as to detect, depending on whether it is open or closed, the position of the pusher. In Figure 4, this pusher 22 is shown projecting to the left of the drawing and maintains in the raised position the branch 21 of the lever 18, by compressing a return spring 25, mounted in a blind hole 26 provided in the face opposite the plate 13. In this position, the bolt 6, fixed on the tilting axis 12 by means of a through key 27, projects beyond the housing 1 and is applied to the pin 9 in the housing 8 of the housing 2. Contacts of proximity 28 and 29, provided opposite on the two boxes 1 and 2, make it possible to verify that the door is then properly closed, the bolt 6 preventing it from being opened uncontrolled. In this position, the bolt is advantageously kept locked on the pin 9 thanks to the engagement in a V-shaped notch, provided in its external surface, of a projection of the same profile 31, formed in the branch 20 of the lever.

 Under these conditions, it is understood that, when the pusher 22 has pushed the lever 18, following the energization of the electromagnet, it has caused the engagement of the projection 31 in the notch 30, up to 'so that the pin 14 comes up against the rear face of the partition 13. The lever 18 keeps the assembly locked in this position as long as the door remains closed, the bolt 6 being applied to the pin 9 (Figure 4) by closing the door. On the other hand, during the retraction of the pusher 22, the electromagnet 17 being put out of tension, the spring 25 while relaxing, drives back the lever 18, releasing at the same time as the bolt 6, by escaping from the projection 31 with respect to the notch 30 (Figure 5) under the effect of a complementary return spring 60 (Figure 10>, returns to the erased position in the housing 1, the microphone -contactor 24 for instantly detecting the release of the resulting door.

 Figure ff illustrates on a larger scale the detail of the embodiment of the shear pin 9, mounted in the strike box 2 to cooperate, in the closed position of the door, with the bolt 6 with tilting axis.

 As can be seen in this Figure, the pin 9, of generally cylindrical shape, has three successive parts, respectively 32, 33 and 34, the central part 32 being disposed in the housing 2 in line with the housing 8, facing the bolt 6 This part 32 is separated from the adjacent parts 33 and 34 by weakening zones, respectively 35 and 36, the resistance of which is chosen by construction of the pin so that the breaking of the latter under the effect of the bolt , occurs following a sufficient pushing force exerted on the door, in particular when it is necessary to maneuver the latter, in emergency opening. The pin 9 thus formed is mounted in a transverse bore 37 of the housing 2 and is stopped at one end by a circlip 38. It comprises at the opposite end, outside the housing, a head 39 with a return spring 40, mounted between this head 39 and the housing, to allow, in case of e rupture of the pin, to eject outward the end of the part 33, in order to signal in an immediately visible manner, that the pin 9 was broken during a previous operation and to make it necessary to replace it with a new pin, to reset the device. A protective cover 41 is advantageously disposed on the housing 2 in the vicinity of the head 39, this cover comprising a fixing tab 42 allowing it to be immobilized on the housing by means of a screw 43. Finally, microswitches 44 and 45 are also shown in the drawing, these micro-switches respectively having the role of detecting the presence of the pin 9 in its bore 37 for one, the penetration of the bolt 5 in the keeper 7 for the other.

 Figure 7 illustrates the detail of the retractable finger 10, mounted in the strike housing in the vicinity of the bolt 6 with tilting axis, this finger being designed to not allow the pivoting of the bolt and consequently the protrusion of this in its housing 8 against the shear pin 9, only if the door is previously brought into the closed position, with the two housings 1 and 2 facing each other.

The finger 10 for this purpose comprises a contact rod 46, extended by a body 47 of generally cylindrical shape, slidably mounted in a housing 48 delimited by a socket 49 disposed against the plate 13 for closing the housing 1. A spring 50 is provided between the body 47 and the bottom of the socket in order to permanently exert on finger 10 a force tending to push it out of the housing, against the ramp 11 of the strike housing 2. The
Figures 8 and 9 also show that the tilting axis of the bolt 6 is suitably machined to present a flat 51, the role of which, when applied to the external surface of the body 47, is to block the axis 12 and thus immobilizing the bolt 6 in the position shown schematically in Figure 8. The bolt 6 remains in it as long as the door is open and the ramp it has not pushed the finger against the spring 50 , as shown in Figure 9; on the other hand, when the finger 10 is eclipsed in the housing 1 inside the socket 49, the body 47 escapes from the flat surface 51, by releasing the rocking axis 12 which can therefore rotate in the housing by driving the bolt 6 of the way already specified.

 FIG. 10 finally shows, in cross-sectional view, the manner in which the tilting axis 12 is mounted to pivot in the closure plate 13 of the housing 1. In this figure, it can be seen that the axis 12 advantageously has a stepped profile , where the central part, carrying the flat 51 cooperating with the retractable finger 10, is extended on each side by pins, respectively 52 and 53, mounted for rotation in bearings 54 and 55. These are arranged in a bore 56 , provided transversely in the plate 13, and are stopped in the appropriate position by means of locking screws, respectively 57 and 58.The bolt 6 immobilized on the axis 12 by means of its key 27, struggles in an open housing 59 of the plate 13, being subjected therein to the action of a small pin spring 60 surrounding the axis, this spring making it possible to exert on the bolt a slight return torque to facilitate its erasure towards the inside of housing i, when the locking lever 18 is itself pivoted backwards.

 The operation of the security lock thus produced is easily deduced from the explanations already given with regard to the various elements involved in its production.

 When the room on the door of which the lock is mounted must be closed, in particular outside public access periods, the bolt 5 is brought into its keeper 7 under the effect of the first electromagnet 16. The door is then conventionally locked, the microswitch 45, by detecting the position of the bolt 5, making it possible to transmit the corresponding information to an appropriate control or monitoring station, which may in particular be located at a distance from the door. Another micro-switch (not shown in the drawings) can also detect the reverse position of clearing the bolt when the door is opened. In all cases, the second electromagnet 17 is de-energized, so that, the locking lever 18 being tilted backwards, its projection 31 has escaped the notch 30 of the bolt 6, which is itself even erased towards the inside of the housing 1 thanks to the spring 60, the bolt thus being in the inactive position.

 On the other hand, when the room is occupied by people, for example if it is a store, by buyers circulating between the shelves of this one, or even if it is a representation room, by spectators seated in adjacent rows, the door fitted with the lock should still be closed when it constitutes an emergency exit but can be immediately opened, either at any time at the request of the local surveillance personnel, or in the event of an incident, by the public itself, who must urgently use the emergency exit thus cleared.

 In this situation, the bolt 5 is permanently retracted, the door being normally closed only by the bolt 6 with tilting axis blocked by its lever 18 pushed back by the pusher 22. For a controlled opening, it suffices to provoke from the station for controlling or monitoring the pusher of the electromagnet 17 by de-energizing the latter, so that this pusher 22 is moved by retracting in the housing and allowing the rearward movement of the lever locking 18, then also pivoting towards the inside of the bolt 6, in the manner already indicated. The door can then be freely opened, the bolt 6 completely escaping the shear pin 9. Note that as soon as the door is opened, the retractable finger 10 is made to project outwards, the body 47 of this finger coming to cooperate with the flat part 51, which immobilizes the bolt in its thus retracted position. When the door is closed, the finger 10 is brought back and disappears again in the socket 49, being pushed back by the ramp 11, the flat part 51 then releasing the axis 12 which can again pivot while making possible the tilting of the bolt 6 hitherto prevented by the support of the flat on the body 47.

 At this instant, the electromagnet 17 can be re-energized to move the lever 18 forwards, in turn driving the bolt 6 against the spring 60 until the pin 14 stops, the parts returning to the closed position of the door as illustrated in Figure 4.

 If, in the previous situation, an incident occurs inside the room, for example not immediately detected at the monitoring station or for which the latter does not react accordingly, the door can nevertheless be immediately unlocked, following an abrupt pushing force exerted on it, this causing the breakage of the pin 9 by the bolt 6 which can therefore escape from its housing 8, allowing the opening.

The information corresponding to the rupture of the pin, immediately perceived by the closure of the micro-contact 44, is then transmitted to the monitoring station, so as to allow, after the incident has ceased, the parts to be replaced in their initial state, in particular after replacing the fragments of the broken pin with a new pin, before closing the door again with resetting the bolt 6 under the effect of one electromagnet 17.

 A security lock of very simple design is thus produced, which has the advantage of excellent reliability, in particular by permitting permanent control of the position of its bolts and consequently of the state of the lock, by responding in particular to requirements of the regulations in force and this in all operating circumstances.

 Of course, it goes without saying that the invention is not limited to the embodiment thus described and shown; on the contrary, it embraces all its variants. In particular, one could provide, instead of a remote transmission of position information and control of the electromagnets, to provide, near the lock, a separate box, of the kind with glass breakage, suitable for cutting directly supplying the second electromagnet releasing the locking lever, with subsequent authorization to clear the bolt with tilting axis to allow the door to open, without breaking the shear pin.

Claims (13)

 1 - Security lock for locking doors or other emergency exits from buildings, shops, meeting rooms or other premises open to the public, comprising a strike box (2) fixed to the frame (4) of the door and a bolt box (1), fixed to the opening (3), comprising a first transverse bolt (5) for locking, capable of closing and blocking the door when the premises are closed to the public, this bolt being slidably mounted in a guide passage (15) provided in the bolt box and actuated by the pusher of a first electromagnet (16) mounted in this box and controlled remotely, so as to be able to engage in a housing (7) arranged in look in the strike box to immobilize the door, characterized in that it comprises, also mounted in the bolt case (1), a second bolt (6), in the shape of a dog, carried by a tilting transverse axis (12 ), perpendicular to the bolt plane and swiveling in s the housing so that, in the closed position of the door, the bolt (6) with tilting axis is supported on a removable shear pin (9), carried by the strike housing, a locking lever (18 ) to immobilize the bolt with tilting axis in its support position on the pin, this lever also being articulated on a pivot axis (19) parallel to the axis of the bolt and actuated against a return spring (25) by the pusher (22) of a second electromagnet (17), housed with the first in the bolt box and controlled remotely, and means (10-51) for erasing and immobilizing the pin bolt tilting when the door is opened, following the withdrawal of the locking lever towards the inside of the bolt box, as long as the door is not closed.  2 - Security lock according to claim 1, characterized in that the lever (18) for locking the bolt (6) with tilting axis (12) has an open L-profile, of which a first branch (20) is articulated around its pivot axis (19) and the other (21) of which cooperates with the end of the pusher (22) of the second magnet (17) so that the latter applies the lever against the bolt, blocking it in door closed position by pressing on the shear pin (9).  3 - Security lock according to claim 2, characterized in that the first branch (20) of the locking lever (18) has a V-shaped projection (31), capable of engaging in a notch (30) of the same profile formed hollow in the bolt (6) with tilting axis (12), in order to perfect the immobilization of the latter in the support position on the shear pin (9).  4 - Security lock according to any one of claims 1 to 3, characterized in that the bolt (6) with tilting axis (12) pivots through a recess formed in a plate or partition (13) closing the housing bolts (1) provided opposite the strike box (2), this bolt being secured to its pivot axis by means of a transverse connection key (27).  5 - Security lock according to claim 4, characterized in that the bolt (6) comprises, to limit its movement, a stop pin (14), carried by the bolt and arranged to abut on the shutter partition (13) of the housing (1) from the inside thereof.  6 - Security lock according to any one of claims 1 to 5, characterized in that the means for clearing the bolt (6) in the bolt housing tl) consist of an eclipsable finger (10), mounted sliding in a sleeve (49), secured to the housing, this finger being able to cooperate with a flat (51), provided on the pin (12) for tilting the bolt (6).  7 - Security lock according to claim 6, characterized in that the strike box (2) has, opposite the eclipsable finger (10), an inclined ramp (11) so that, when the door is closed , this ramp causes the progressive sliding of the finger in its socket (49), by authorizing the tilting of the bolt (6) under the effect of a spring (60) bringing the bolt into a position where it receives the lever (18) locking actuated by the pusher (22) of the second electromagnet (17).  8 - Security lock according to any one of claims 1 to 7, characterized in that the shear pin (9) comprises a cylindrical body, having two localized weakening zones (35,36), spaced one of the other and delimiting between them a part (32) of the body disposed transversely in an open housing (8) of the strike box (2), housing in which penetrates the bolt (6) with tilting axis (12) during closing Door.  9 - Security lock according to claim 8, characterized in that the cylindrical body of the pin (9) is mounted in a transverse bore (37) of the strike box (2), being stopped at one end by a circlip or similar (38) and projecting from the housing at the other end, the latter being provided with a head (39) forming a support stop for a spring for ejecting (40) the pin following the breaking of that under the effect of the bolt (6) with tilting axis (12) causing the rapid emergency opening of the door.  10 - Security lock according to claim 9, characterized in that the head (39) of the pin (9) is arranged under a protective cover (41), carried by the strike box (2), to avoid brutal projection of the head under the force of the ejection spring.  11 - Security lock according to any one of claims 1 to 10, characterized in that it comprises a set of micro-contactors (24,44,45), mounted respectively in the bolt boxes (1) and strikes (2) to control the position of the solenoid pushers (16,17), the presence or absence of the first bolt (5) in its housing (7), the support of the bolt (6) with tilting axis ( 12) on the shear pin (9) or the erasure of this bolt in the housing, and the presence of the pin (9) in its bore 37.  12 - Security lock according to any one of claims 1 to 11, characterized in that it is associated with a separate cabinet, in particular of the kind with "broken glass", installed in the immediate vicinity of the door and suitable for cutting directly supplying the second electromagnet (17), thereby releasing the locking lever (18) and permitting the erasure of the bolt (6) with tilting axis (12) and the opening of the door, without requiring breaking of the pin (9).  13 - Security lock according to any one of claims 1 to 12, characterized in that it comprises proximity contacts (28,29), mounted respectively in the bolt box (1) and the strike box (2 ) to control the closing or opening of the door.