DE19824344A1 - Additional security for double-lock safes and deposit boxes having keys - Google Patents

Abstract

Doors having two separate keys for security are further protected by closing one keyhole with an electromagnetically, or motor driven (8,9), shutter (7), locked in place by a magnetically (17) operated slide (16) which may be remotely released.

Description

The invention relates to an additional security device with a keyhole lock for doors or Door locks with at least one lock that can be locked with a key, in particular re for a double-locking safe door of a safe deposit box in money institution with a one-hole or two-hole closure.

It is known to lock the doors in addition to a locking jaw with a locking bolt provided so that there is an additional shut-off of the door.

Doors are often secured with two locks placed one above the other chert, so that two locking jaws come into effect independently of each other.

The locking jaws represent one-sided beveled traps, which by slamming the Door open by itself.

It is also known to locks with larger keyholes through insertable security security key in the form of a keyhole lock.

Such additional mechanical fuses are easy to manipulate and not from a distance controllable. Their handling is also cumbersome, with one in a keyhole insertable keyhole lock in the keyhole is fixed and in it brought front key part must be removed and appropriate handling in reverse sense to eliminate this keyhole lock must be done.

In the case of smaller keyholes, such a relatively wide and long key can be used hole closure can not be attached. The cumbersome mechanical handling is included particularly disadvantageous when creating several doors to be secured.

On the other hand, there is a great need for additional security devices, in particular for safe doors Safe deposit systems in financial institutions and the like. According to these the most common Door locks are generally a real mechanical bank lock (double lock) given, an opening of the respective safe door by a customer and a separate ten bank key must be done.  

It is a one-hole or two-hole closure in the form of a bank closure and Given customer lock. So far, it has been necessary for a bank employee to the bank key accompanies the bank customer to the opening of his safe-deposit box while doing so Safe door with the bank key opens before the customer closes his lock himself Customer key can open.

In this respect, additional security of the bank lock is desired, by means of which the escort the bank customer can be omitted by a bank employee and be the bank customer himself Safe compartment immediately with both the bank key to be handed over to him and his Customer key can open, but on the other hand a mani through the additional security pulation of safe doors of the safe deposit system is avoided.

Starting from an additional security with a keyhole lock mentioned above ten type is therefore the object of the invention, an additional security with a key to create a hole lock for doors and door locks of this type, which are easy to assemble and is operable and preferably a remote controllable opening and / or blocking and Control of the opening status of your keyhole lock allowed. Additional fuses for several doors and door locks should therefore preferably be operated centrally and be controllable. The additional security is intended to be retrofitted in each case Allow door locks, the given type of door lock, e.g. B. a mechani bank lock (double lock) is retained.

It should also be able to be formed in a preferred manner in such a way that it itself is on the front side of narrow safe doors with a low door height (5 cm).

To achieve the above-mentioned task, the formation of an additional security with a Keyhole lock of the type mentioned in accordance. characteristic part of the claim ches 1 or claim 2 provided.

According to these claims, the assembly of a flat housing on a door closure or the outside of this receiving door provided, in this Housing an electrically or electromagnetically operated key lock is arranged, wherein a plate-shaped locking element with opening and locking the keyhole of the door lock to be secured in an open and closed state of the key ches is movable.

It is possible to use a PC control centrally for several additional backups Control signals an actuating mechanism consisting of an electromagnet or electric servomotor and a guide for the plate-shaped locking element, such to move it to unlock and lock the keyhole. Then the lock, e.g. B. a Bank lock, opened with the key provided, what with a rental Special system can be done directly by the customer. Will be the key subtracted again, press according to Claim 1 a return spring, the plate-shaped lock element back in the closed position, the electromagnetic or electromotive Actuation of the adjusting mechanism due to the removal of the key interrupting circuit of this drive or one that has already taken place  There is no interruption of the current and thus a reset in the closed NEN state of the keyhole lock can be done.

According to claim 2, there is no automatic reset of the keyhole lock in the closed state provided in the event of a power failure. Rather, the return takes place position for closing the keyhole lock as well as the adjustment for opening the keyhole lock by the provided electromagnetic or elektromoto drive of the actuating mechanism, which controls the movement and guidance of the mechani causes plate-shaped locking element.

The movement positions of the Stellmecha can by additional springs and locks must be determined in which the open and the closed state of the key hole lock results.

The additional lock with keyhole lock is in a flat housing small dimension added, which in this respect on the outside of the lock to be secured or the corresponding door area can be installed. The housing consists of a Ge rear mounting plate and a front housing cover, this Parts are stackable and screwed together. Both the mounting plate as the housing cover also each has a recess, these mutually lie flush one above the other, so that a continuous one on the door lock to be secured Keyhole arrangement according to the existing keyholes after screwing on of the housing is given.

Despite the attachment of the additional fuse housing, the keyholes are closed securing door lock can still be operated.

Remote control of the additional fuse is possible, with control lines to the to lead electromagnetic or electromotive drives or its power supply are. Alternatively, the remote control can be carried out directly in the housing Additional fuse attached receiver and a central con troll and control unit to be used transmitter.

In this respect there is an automatic electrical opening and blocking of the opening state the keyhole lock, which is easy to assemble and operate.

It is always possible to retrofit door locks, the given type of door lock, e.g. B. a mechanical bank lock (Double lock in the manner of a one-hole or two-hole lock with bank key and Customer key) is retained.

It is a compact design of this additional security, especially when used of solenoids and one of these leading U-shaped guide frames, on which in NEN, the plate-shaped locking element is fixed, as claimed in claim 6 is.  

According to claim 3 to claim 5, the use of an electromagnetically actuated Ren security latch additionally provided, which the before opening the bank lock Setting mechanism or guide frame of the plate-shaped locking element releases by the electromagnet in which this safety bolt is guided as an anchor is activated and then the electromagnetic or electromotive actuation of the actuating mechanism nismusses and adjustment of the locking element takes place. After that, the secured can Lock can be opened with the key provided, so with a locker system both the customer lock and the bank lock directly by the bank customer can be opened by yourself. If the key is removed again, the plate-like shape is obtained Locking element of the keyhole lock in the closed state and the return spring of the safety catch pushes it back again due to the electromagnet being switched off (Pull magnet) in the closed position opposite the adjusting mechanism or the guide of the plate-shaped locking element.

Especially for arrangement on narrow safe doors of a safe deposit box system with a small one Door height (5 cm) is the formation of the additional security according to Claim 6 provided the longitudinally displaceable locking element being formed from a rectangular steel plate, whose dimensions are larger than those on the mounting plate and the housing cover Recesses of the housing receiving the additional fuse is and at least one Has length or width of the area of the keyhole cross section.

To move the U-shaped guide frame of the locking element is not an upper provided by this solenoid, but laterally on the right and left a solenoid in which the right and left of the plate-shaped locking element tes guided guide and bearing arms of the guide frame by activation and deactivation tion or switching of these solenoids are longitudinally displaceable. The leadership and la In this respect, arm arms form anchors on which the magnetic field of the lifting magnets that forms works. Due to the lateral arrangement of the lifting magnets to the U-shaped guide frame and the arrangement of the plate-shaped locking element within this guide frame thereby a compact arrangement of this drive and adjusting mechanism of the additional security tion, which can be formed with a low overall height of 2-3 cm and insofar can be accommodated in a housing which has an overall height which is less than 5 cm and in this respect even on the front of narrow safe doors with a low door height of is less than 5 cm mountable.

It is possible in this compact design additionally gem. Claim 7 and 8 one Electromagnetically actuated safety latch below the U-shaped one to be used Apply guide frame, the pull magnet acti by switching on the current fourth and the locking bolt thus against the force of its return spring from its ge compared to the guide and bearing arms of the guide frame to be lifted locking position is pushed into the open position of this lock. Acc. To saying 11 and 12, the use of up micro or magnetic switch Build detectors, which detect whether the keyhole lock is open or closed (door open or door closed) or whether the housing cover of the housing of the additional fuse is opened or is closed or the plate-shaped locking element is forced out of its closed State and the lock bolt is moved from its locked state.  

It is therefore particularly given with safe doors for safe deposit systems in financial institutions real, mechanical bank lock (double lock) possible, this despite the system inventive, electrically or electromagnetically remote-controlled additional fuse to he hold and therefore the dangers of duplicating the freely accessible bank key (Locking the bank lock with a duplicated bank key) or by manipulation accessible signaling contacts of the safe system, transponders (acceptance of the transponder from the key) and key switches (insert a duplicate bank key in the Key panel) etc. to be omitted.

It is therefore an easy to install and operate control and remote control of the additional security tion in the form of an electrically or electromagnetically operated keyhole lock ben, with a central actuation of the additional security of several door locks by one Control panel is possible controlled. It is just a flat case, which the Keyhole lock takes on the safe door, with behind the opened Neten or locked keyhole of the housing in the two-hole lock the so-called Bank lock and the one-hole lock behind the left keyhole both the Bank lock as well as the customer lock conceals. In both cases there is a remote control erable opening and / or blocking of the bank lock possible. The sense of blocking the Bank lock consists of the subsequent installation of a financial institution enable remote-controlled bank lock, the real mechanical bank ver can be maintained and the continued use of the bank key sels to open the safe door can be done directly by the customer if he at the same time tig opens its customer lock. This is the otherwise necessary accompaniment by one Bank employees with bank keys are no longer necessary. Rather, there is a controlled one Self-service in the safe deposit systems by the bank customers themselves.

In such a safe deposit box system, the modulation takes place via a PC control or activation of the electromagnet or stepper motor of the plate-shaped locking element and an activation of the electromagnet of the locking bolt, whereby the locking belt gel releases the plate-shaped locking element and then the keyhole the bank lock. At the same time, the detector installed under the blocking element gives an Si signal that reports to the PC control that the keyhole lock is open (door on).

Then the lock of the bank lock can be opened with the key. Will the If the key is removed again, a return spring or the stroke amount to be used presses gnet or electric stepper motor the plate-shaped locking element back in the closure position, the return spring on the safety catch this back in its locking position lung pushes. At the same time, the detector gives the key in the lower or upper position Hole lock a signal that the lock is closed or open (door closed).

Should be attempted to illegally overcome the keyhole lock or even the The keyhole lock detector and the detector give the housing cover off of the housing cover alarm.  

Alternatively, the signals to the keyhole lock and the feedback to the PC control also transmitted wirelessly by installing a small transmitter / receiver will. Alternatively, the keyhole lock and the locking bolt can also be used instead of Ma gnete operated by electric motors. The plate-shaped locking element can slidably or rotatably.  

The invention is described below with reference to a preferred embodiment explained in more detail on its drawings.

The drawings show:

Fig. 1 is a plan view of a safe door with a double lock of a rental locker system for financial institutions and with an external mechanical additional security in the form of a keyhole lock of the left bank lock placed over the two lock openings;

Fig. 2 is a safe door with mechanical additional security according to. Fig. 1, in which the open in Figure 1 keyhole of the bank lock is closed by an adjustable in an externally mounted housing locking element ver;

A schematic representation of the construction of which is arranged in the housing aufmontierten adjustable mechanical additional security, the housing open to the outside and the key hole is opened Fig. 3;

Fig. 4 shows the schematic representation of the structure of the mechanical additional fuse according. Fig. 3, wherein the locking element now covers the opening of the keyhole and is additionally fixed in this locked state by a double-sided engagement of the locking bolt with respect to the safe door.

In Fig. 1 you can see a safe door 2 , on which a se in a flat housin 6 , as an integrated keyhole lock of a bank lock 3 serving electromechanical additional security 1 is screwed.

The housing 6 screwed onto the safe door 2 has a quite corner-shaped recess both over the keyhole 5 of the bank lock 3 and over the keyhole of the customer lock 4 , a continuous keyhole arrangement being formed and the keyholes of both the bank and the Customer lock in the state shown as the respective outer recess open, so are not locked by the keyhole lock.

The housing 6 of the additional fuse 1 has, apart from the two slightly larger than the keyhole openings of the bank and customer lock recesses, a closed mounting plate and an outer otherwise closed housing cover 21 placed thereon, these housing parts being mounted such that two curse each Rectangular recesses over the two key holes of the bank and customer lock come to rest.

In the present case, a safe door with a two-hole lock is shown, that is, one separate customer and bank lock. If the safe door is only a single-hole lock has a correspondingly smaller size, only recesses above the Use the keyhole of the combined customer and bank lock housing be det.

Fig. 2 again shows the arranged on a safe door with a two-hole lock on the outside via the keyholes of the bank and customer lock, in which a rectangular flat shape housing 6 applied additional security 1 , but now the left keyhole 5 of the bank lock 3 is locked by a black, plat ten-shaped locking element 7 from the outside.

The bank lock 3 and the customer lock 4 are arranged laterally at a distance from one another, wherein no keyhole lock is provided for the customer lock 4 .

In the case of a one-hole lock, the safe door is in contrast to the present version Example provided only a single keyhole, this for the bank lock and is also used for customer closure at the same time.

Both the one-hole closure and the two-hole closure each have a remote-controllable opening of the bank closure, with the bank closure being closed by the plate-shaped locking element 7 in the absence of a control signal.

The purpose of locking the bank lock 3 until the time when the safe deposit box is finally to be opened with the keyhole lock removed is to open the door locks to the customer, in particular even without the assistance of a bank employee, both with the bank key and with possible customer key.

In this respect, there is a controlled self-service of the bank customer of a safe deposit system using both the bank key and the customer key.

The structure of the mechanical auxiliary fuse 1 , which is created in the housing 6 , is shown in FIGS. 3 and 4, where the parts of the electro-mechanical auxiliary fuse 1 mounted on the safe door 2 are omitted, with the housing cover 21 omitted the open state of the keyhole lock as well as in the closed state are shown.

In Fig. 3, the keyhole 5 of the bank lock 3 is in the open state, i.e. in a state in which the plate-shaped locking element 7 of the additional electro-mechanical fuse 1 does not block this keyhole, but in the area of the housing 6 above the keyhole 5 or is located in the mounting plate of the housing 6 and in its cover 21 rectangular recesses.

In this open state, the plate-shaped locking element 7 is held by two actuated solenoids 8 , 9 , in which two acting as an arm displaceably gela bearing and guide arms 13 , 14 are pushed ver by actuating these solenoids up. The bearing and guide arms 13 , 14 are guided laterally to the right and left of the plate-shaped locking element 7 and are connected to it in such a way that it moves upwards with them at the same time, so that the keyhole 5 of the bank lock 3 when the solenoids 8 are actuated, 9 becomes free.

This takes place against the force of a return spring 15 , which acts from above against a Füh tion of the plate-shaped locking element 7 . The locking element 7 is placed centrally on the underside of a U-shaped guide frame 12 , the legs of which are each formed by the two parallel bearing and guide arms 13 , 14 .

These can be displaced in a lateral parallel guide 11 vertically to the side of the keyhole 5 of the bank lock, so that the plate-shaped locking element 7 arranged in the middle thereof can be moved from the outside via the keyhole 5 of the bank lock.

Before the solenoids 8 , 9 are activated, there is an unlocking of a locking of the bearing and guide arms 13 , 14 given by a lower electromagnetically operable securing bolt 16 , said arm being laterally vertically movable against it on both sides. In the locked position, this is with its front tip and its bent end in a locking position against both the left and right bearing and guide arm, which locking position is set by the pressure of a return spring 18 with no current-carrying pull and lifting magnets.

A shift of the electromagnetic locking bolt 16 takes place via a pull magnet 17 in which the locking bolt is guided in a longitudinally displaceable manner. This adjustment takes place before activation of the solenoids 8 , 9 . This takes place against the force of the return spring 18 by which the safety catch 16 is fixed again when the pull magnet 17 is not activated in its locking and engagement position against the two ends of the bearing and guide arms 13 , 14 which have been moved down after the activation of the lifting magnets.

Furthermore, FIG. 3 shows the detector 19 constructed from a microswitch or magnetic switch with which a status message can be sent to the control unit of the safe system, that is to say the message as to whether the keyhole lock is open or closed.

To the right of the safety catch 16 , a further detector 20 can be seen , with which a message is given that the housing cover 21 of the housing 6 is open or closed (alarm message).

The housing 6 extends from the bank lock 3 further to the customer's closure 4 to the right and there additionally has a free space for receiving a receiver in the housing 6 , so that the actuation of the actuating mechanism 10 for the solenoids 8 , 9 and the pull magnet 17th and so that the adjustment of the plate-shaped locking element 7 can take place directly by means of transmitter and receiver by radio instead of via control lines and cabling.

In Fig. 4, the open housing 6 as shown in Fig. 3 with a simple representation of its Mon day plate, on which the parts of the auxiliary fuse 1 are mounted. The electromagnetically actuated plate-shaped locking element 7 is in a keyhole 4 of the bank lock 3 locking state. This is in this case solenoid coils on its side bearing and guide arms 13, 14 in this closed state, in which the Hubma 8, 9 are disabled, held by the securing catches sixteenth This locks the U-shaped guide frame 12 and thus the locking element 7 , in which the tip and the end thereof lock against the two outer ends of the parallel bearing and guide arms 13 , 14 .

In order to enable a message to the control unit of the safe deposit box system, according to which the keyhole lock is open or closed, there is a contact detector in the area in which the securing bolt 16 comes into effect against the bearing and guide arm 13 arranged in the left lifting magnet 8 19 arranged and is in the locking position of the locking bolt 16 from the status message "keyhole closed".

This type of retrofitting of existing safe deposit systems has to everyone previously known solutions have the advantage that a real, mechanical bank lock (Double lock) remains and therefore the dangers of duplicating the freely accessible bank key (closing the bank lock with a duplicated bank key) or through manipulation of accessible signaling contacts or other trans ponder (removal of the transponder from the key) and key switches (insert one duplicated bank key in a key board) etc. are omitted.

The keyhole 5 of the bank lock 3 is opened and closed as follows via a PC control from the control unit of the safe deposit system:
The lifting magnets (electromagnets 8 , 9 ) of the plate-shaped locking element 7 and previously the pull magnet 17 of the securing bolt 16 are activated via the PC control, a current flowing in these magnets, so that the two bearing and guide arms 13 guided in the form of anchors in these magnets , 14 or the locking bar 16 due to the induced Ma gnetfeldes and the U-shaped guide frame 12 with the two bearing and guide arms 13 , 14 and the plate-shaped locking element 7 up to the upper edge of the housing 6 against the return spring attached there 15 move.

Previously, the safety catch 16 releases the U-shaped guide frame 12 and the plate-shaped locking element 7 arranged centrally below it, and now due to the lifting magnets 8 , 9 to be activated, the U-shaped guide frame 12 can be raised with the locking element 7 located beneath it and thus now even now releases the keyhole.

At the same time, the detector 19 installed under the plate-shaped locking element 7 emits a signal which reports to the PC control that the keyhole lock is open (possibility of opening the customer lock and bank lock, door open).

The bank lock can then be opened with the bank key. If the key is removed again, the return spring 15 presses the plate-shaped locking element when the current of the solenoids 8 , 9 is switched off again into the closed position. After switching off the pull magnet 17 , the return spring 18 can then move the locking bar 16 also back to the closed position to the left against the ends of the down-shifted bearing and guide arms 13 , 14 .

When the locking bolt 16 and the ends of the bearing and guide arms 13 , 14 engage, a signal is then issued by the detector 19 that the keyhole 5 has been blocked again by the plate-shaped element 7 and the safe door 2 is closed.

If an attempt is made to overcome the keyhole lock without authorization, for example to lift the plate-shaped locking element 7 from the outside or even to remove the outer cover of the housing 6 , the detectors 19 , 20 give an alarm.

As an alternative to using control lines, the signals from the detectors 19 , 20 and the feedback to the PC control can also be transmitted wirelessly by installing a small transmitter / receiver.

Furthermore, alternatively, the plate-shaped locking element 7 and the locking bar 16 can be driven by electric motors instead of magnets.

The locking element 7 and the locking bolt 16 can also be rotatably supported instead of longitudinally displaceable.

Reference list

1

Additional security

2nd

Safe doors

3rd

Bank lock

4th

Customer lock

5

Keyhole of the bank lock

6

flat housing

7

plate-shaped locking element

8th

,

9

electromagnetic drive (solenoids)

10th

Adjusting mechanism

11

Parallel guidance

12th

U-shaped guide frame

13

,

14

parallel bearing and guide arms of the guide frame (

12th

)

15

Return spring

16

Safety latch

17th

Pull magnet

18th

Return spring

19th

Alarm switch (open or closed keyhole)

20th

Signaling switch (housing cover alarm)

21

Housing cover

Claims (15)

1. Additional security ( 1 ) with a keyhole lock for doors or door locks with at least one lock that can be locked with a key, in particular for a double-locking safe door of a safe deposit box system in financial institutions with a one-hole or two-hole lock, characterized in that the additional security ( 1 ) has an electromagnetically switchable control signal ( 10 ) and a mechanical plate-shaped locking element ( 7 ) which can be actuated via control signals electromagnetically or via an electric servomotor for a keyhole lock, the electromagnetic or electromotive actuation of the actuating mechanism ( 10 ) and Adjustment of the locking element ( 7 ) this from a keyhole ( 5 ) locking state is brought into a releasing state and that when switching off the electromagnetic or electromotive drive ( 8 , 9 ) the locking element ( 7 ) d urch by a return spring ( 15 ) in the keyhole ( 5 ) blocking state, and that the arrangement of these parts of the keyhole lock in a flat from the outside to the lock to be secured or the corresponding door area mountable housing ( 6 ), which with a continuous keyhole arrangement according to the Anord voltage of the additional keyhole to be secured or the keyholes of the bank and customer locks is provided. 2. Additional security ( 1 ) with a keyhole lock for doors or door locks with at least one lock that can be locked with a key, in particular for a double-locking safe door of a safe deposit box system in financial institutions with a one-hole or two-hole lock, characterized in that the additional security ( 1 ) has an electromagnetically switchable control signal ( 10 ) and a mechanical plate-shaped locking element ( 7 ) which can be actuated via control signals electromagnetically or via an electric servomotor for a keyhole lock, the electromagnetic or electromotive actuation of the actuating mechanism ( 10 ) and Adjustment of the locking element ( 7 ) this from a keyhole ( 5 ) blocking state is brought into a releasing state and that by switching the direction of force or the magnetic field of the electromagnetic or electromotive A ntriebs ( 8 , 9 ) the locking element ( 7 ) in the keyhole ( 5 ) locking state returns, and that the arrangement of these parts of the keyhole lock takes place in a flat from the outside to the lock to be secured or the corresponding door area mountable housing ( 6 ) , which is provided with a continuous keyhole arrangement corresponding to the arrangement of the additional keyhole to be secured or the keyholes of the bank and customer locks. 3. Additional security according to claim 1 or 2, characterized in that the locking element ( 7 ) of the keyhole lock in the keyhole locking state by a releasable locking bolt ( 16 ) is additionally locked in this orientation against displacement. 4. Additional fuse according to claim 3, characterized in that the safety bolt (16) is electromagnetically actuated by a pull magnet (17) against a restoring spring (18), without activating the pull magnet (17) Ver displacement of the securing bolt (16) through the Return spring ( 18 ) against an extension ( 12 ) of the plate-shaped locking element ( 7 ), which is in the locked position without activation or when switching its drive in the keyhole. 5. Additional security according to one of claims 1-4, characterized in that the locking element ( 7 ) is attached below a lug-shaped, U-shaped guide frame ( 12 ) guided in a parallel guide and from above, below or laterally via the keyhole ( 5 ) is longitudinally displaceable in the locking state in the manner of a gate valve or can be pivoted into the locking state via a rotary guide. 6. Additional security according to claim 5, characterized in that the longitudinally displaceable locking element ( 7 ) consists of a steel plate at least in a length and width of the area of the keyhole cross section, the steel plate below the U-shaped guide frame ( 12 ) being fastened to a central projection and the guide frame ( 12 ) laterally to the right and to the left of the steel plate or the plate-shaped locking element ( 7 ) at a distance from it downwardly extending and connected with this in connection guide / bearing arms ( 13 , 14 ), each as Anchors in egg nem laterally right and laterally left of the steel plate ( 7 ) arranged solenoids ( 8 , 9 ) are mounted for longitudinal displacement. 7. Additional fuse according to one of claims 4-6, characterized in that the electromagnetically actuated locking bolt before electrical activation and acti vation of the two lifting magnets ( 8 , 9 ), which the plate-shaped locking element from the keyhole ( 5 ) closing position in the open Raise position, even with a circuit of the current of its pull magnet ( 17 ) activated and against the spring force of its return spring ( 18 ) from its relative to the guide and bearing arms ( 13 , 14 ) given locking position is shifted. 8. Additional fuse according to claim 7, characterized in that the electromagnetically actuated locking bar ( 16 ) after switching off the Zugma gneten ( 17 ) and closure of the keyhole ( 5 ) by the deactivation of the stroke magent ( 8 , 9 ) under its return spring ( 15th ) or by switching the solenoids ( 8 , 9 ) moving locking element ( 7 ) also under the mere effect of its return spring ( 18 ) in the locking position against the ends of the bearing and guide arms ( 13 , 14 ) of the U-shaped guide frame ( 12 ) of the locking element ( 7 ). 9. Additional fuse according to one of claims 1-8, characterized in that the control signals for switching the actuating mechanism ( 10 ) via an electrical control line for switching the current of the electromagnetic or motor drives ( 8 , 9 ; 17 ) or wirelessly can be transmitted via a remote control with transmitter and receiver. 10. Additional fuse according to one of claims 1-9, characterized in that the locking element ( 7 ) and the actuating mechanism ( 10 ) and its return spring ( 15 ) and / or drive ( 8 , 9 ) and the locking bolt ( 16 ) and its drive ( 17 ) with return adjusting spring ( 18 ) on the inside of the mounting plate of a flat housing ( 6 ) which can be mounted on the door lock or the door leaf, which can be closed with a screw-on cover ( 21 ). 11. Additional fuse according to one of claims 1-10, characterized in that via a microswitch or magnetic switch ( 19 ) at the end of the displacement path of the plat-shaped locking element ( 7 ) or its outgoing from the guide frame ( 12 ) bearing and guide arms ( 13 , 14 ) is arranged, a message is sent to a control unit, after which the keyhole lock is open or closed and is functional. 12. Additional fuse according to one of claims 1-11, characterized in that a micro or magnetic switch ( 20 ) is further arranged in the flat housing ( 6 ) on its mounting plate, which detects whether the housing to be secured is open or closed ( Alarm message). 13. Additional security device according to one of claims 1-12, characterized in that the flat housing ( 6 ) which can be mounted on the door plate additionally has a receiving area for mounting a receiver which serves for remote control of the door lock release. 14. Additional security according to one of claims 1-13, characterized in that the flat housing ( 6 ) has a rectangular dimension in a size smaller than that of the door of the safe-deposit box to be protected and can be screwed onto the outside thereof, and with the formation of its continuous keyhole arrangement both in its housing cover ( 21 ) and in its lower mounting plate rectangular, the outside or the keyholes to be secured has surrounding recesses. 15. Additional fuse according to one of claims 4-14, characterized in that the control lines to the electromagnetic or electromotive drives or their power supply ( 8 , 9 ; 17 ) via the safe doors of a safe deposit system from safe door to safe door Cable loops are continued.