DE2918788A1 - Safe lock de-blocking mechanism - has electrical switch activating de-blocking circuit before lock bolt reaches final unlocked position - Google Patents

Abstract

The internal cams (34) and (74) of the tumbler plate (32) and slide (72) are designed in such a way, that following a turn of the customer's key the slide (72) is moved to the right into a deblocking position. At the same time the blocking arm (48) is moved into its release position by the operating arm (78). The turning of the key causes also a swinging motion of the tumbler plate (32) into its release position, while the lock bolt (20) remains in the locked position during the turning of key. During the movement of the slide (72) into the deblocked position, the tumbler plate (32) produces via the operating arm (44) of the tumbler plate (32) a release of the switching arm (68) of the electric switch (72), hereby by moving switching element (64) into the second switching position. When the slide (72) reaches the de-blocked position, the lock bolt (20) may be moved into its open position.

Description

Description

Security lock, in particular safe lock The invention relates to a safety lock, in particular a safe lock, according to the preamble of the patent claim 1.

Security locks of this type are usually secured Lock of bank safes that can be opened with a customer key is used.

They are each equipped with an electrical switch, through which they both before and after closing, i.e. in each of its two switching states, automatically connected to an electrical or electronic alarm device by any manipulation of a safe lock of a safe monitoring center be reported.

Such security locks can only be opened by the bank customer if the safe lock has previously been unlocked by the solenoid-operated locking device what has been done from the monitoring center by switching on the magnet can be done.

The circuit that excites the magnet is controlled by a switch only interrupted when the safe lock is opened. After previously by the bank customer informs the surveillance center of the intention to open a safe lock must be, this means that the magnet of the locking device so long must remain excited until the bank customer from the surveillance center to the bank safe has arrived and has opened its door. This relatively long switch-on time of the magnet-controlled Locking device makes it necessary to power the security locks All bank safes are complex and correspondingly expensive to design, because in extreme cases a simultaneous unlocking of the security locks of all bank safes is guaranteed have to be.

The invention is therefore based on the object of a safety lock to improve according to the preamble of claim 1 so that the components of for the power supply of the security locks serving electrical device can be designed for a much lower maximum power and accordingly the overall electrical device made much simpler and cheaper and can be operated.

According to the invention, this object is achieved by the characterizing features of claim 1 solved.

With such a safety lock is therefore for the lock unlocking only briefly switched on immediately when the locking mechanism is opened of the electric current is required to energize the magnet of the locking device. The monitoring center is therefore in the event of an intended opening of the safe only apply voltage to the switch of the safe lock to be opened, whereby However, the magnet of the locking device only after the customer key has been inserted is activated briefly in the safe lock to unlock it, in which this the switch is transferred to its other switching state.

The duration of the current pulse required for this can be determined by the electrical switch itself or by the electrical or electronic working Control device of the monitoring center are regulated.

The electrical switch can only be used to control the Serve locking device. In this case it is still useful in the housing to provide another electrical switch through which the safety lock automatically returns to alarm monitoring after the bank safe in question is closed is taken over.

However, it is much more advantageous to use the safety lock to equip a switch according to claim 2, which thus fulfill two functions can, namely when opening the safety lock, the circuit to excite the magnet to close briefly as well as the alarm device of the safe monitoring center to signal the opening of the security lock.

As soon as the safety lock is closed again, and here the electrical switch is returned to its first switching state the electrical or electronic alarm device activated again to close of the security lock.

Accordingly, an attempt would be made to use the security lock with the customer's key to open again, triggering an alarm.

Each time the security lock is closed, it is the bank customer, if he wants to open the security lock again, for security reasons forced to announce this to the safe monitoring center beforehand, thus from this from again the electrical switch can be applied to voltage.

But it is also possible to use the electrical or electronic alarm device to be interpreted in such a way that on the part of the bank customer the security lock in a certain Can be opened several times in a row.

Should, due to a power failure, the locking device cannot be started by the electrical switch and the magnet, so can the unlocking device to the mechanical with the help of a bank key Unlocking the locking device can be operated. Is the security lock unlocked, the bank key can be withdrawn and with the help of the customer key the lock bolt can be moved into its open position. In doing so, one becomes expedient Lay out the construction in such a way that, when the mechanical unlocking takes place, the Locking device of the electrical switch transferred to the switching state is through which the security lock is monitored by the alarm device is taken over. This has the advantage that when the safety lock is closed again, however, if the unlocking device is mistakenly left in the unlocking position, an alarm message is issued automatically as soon as the power failure has ended.

Therefore, the safety lock is back in the normal operating condition the unlocking device with the bank key is back in bring the locking device to its original ready position can automatically take their locking position again.

The arrangement and operation of the electrical switch for control the locking device as well as the inclusion of the security lock in the alarm device of the safe monitoring system can be different. Likewise the Training the switch. In order to be able to build as space-saving as possible, it is cheap to to provide a microswitch as an electrical switch.

This switch can be activated by at least one guard locking of the locking mechanism Be actuated, which can then be operated with the unlocking device that can be actuated by a bank key is to be coupled in such a way that when the locking device is manually unlocked the electrical switch from its closed position by means of a bank key of the lock corresponding switching state moved out.

If after closing the security lock the unlocking device mistakenly no longer in their ready position by means of the bank key is reset, the locking mechanism of the locking mechanism remains in its switch in its switching position that causes an alarm message.

As has already been explained above, this is an automatic Alarm message guaranteed as soon as voltage is applied again.

In a preferred embodiment of the invention, the electrical Switch and the magnet of the locking device form an assembly that is advantageous in the housing behind the lock bolt can be arranged.

When the electrical switch is arranged separately from the magnet this can be done in such a way that the switch can be accessed directly by the customer key or is operated at least indirectly by the lock bolt itself.

Possible configurations of the locking mechanism to be used with preference are the subject of claims 7 to 13.

Further features and details of the invention are apparent from the subsequent description of exemplary embodiments shown in the drawing inventive security locks and / or explained in the claims. The drawings show: FIG. 1 a front view of a first exemplary embodiment a security lock from the housing of which the housing cover has been removed, the unlocking device, which can be actuated by a bank key, is in their ready position and the locking device in its locked position is located; FIG. 2 shows a representation similar to FIG. 1, with the unlocking device by a bank key in their unlocked position to unlock the locking device has been brought; Figures 3 representations of the operating states of and 4 security lock according to Figures 1 and 2, but referring to the representation the mechanical unlocking device that can be operated with a bank key is dispensed with has been; FIG. 5 shows a representation similar to FIG. 1 of a second exemplary embodiment a safety lock, in which, however, the unlocking device is not shown, but the lock bolt is locked; 6 shows the safety lock shown in FIG with unlocking device, but the lock bolt is not shown; figure 7 shows a representation similar to FIG. 5, but with the lock bolt unlocked; figure 8 shows a representation according to FIG. 6, but with a control in its unlocked position Unlocking device; FIG. 9 shows a control circuit for a safety lock; Fig. lo a block diagram of the entire control system.

The two exemplary embodiments in FIGS. 1 to 4 and 5 to 8 shown, as a whole with 10 designated security locks are with a, through a customer key operated locking mechanism 12 and with a bank key actuatable unlocking device 14 equipped. Both in one thing Housing 16 arranged components of the security locks is within the housing assigned as a whole with 18 designated locking device.

The closing mechanism is described below with reference to FIGS. 3 and 4 as well as 5 and 7 12 and the locking device 18 of the safety locks described in detail, in which figures, for a better understanding of the design and function of the locking mechanism, the illustration of the unlocking device 14 has been omitted.

In the housing 16 is a formed for example by a circuit board Lock bolt 20 arranged to be longitudinally displaceable, the one with at its front end 22 has designated locking nose, which has a slot-shaped recess in a housing end wall 24 penetrates. Figure 3 or 5 and 7 show the lock bolt in its closed position. The lock bolt is in its closed position by means of a customer key its open position shown only in Figure 4 movable, including the customer key e.g. on a housing-fixed that penetrates a tumbler 26 of the lock bolt 20 Push-on pin 28 is to be attached and rotated.

To operate the lock bolt 20, one or more tumblers 32 are used, the one facing the housing cover Flat side of the lock bolt be mounted on a pivot pin 30 held thereon can. i For the purpose of easier understanding of the construction is in the present Fall on the representation of several such tumblers, as they are usually at such security locks can be provided, has been dispensed with. It is only one tumbler 32 pivotably held on the pivot pin 30 is shown, both to control the locking device 18 and to move it back and forth of the lock bolt 20 is used. But it is also easily possible to lock 32 only to control the locking device 18 and one or more further tumblers exclusively for locking and releasing the lock bolt 20 to be provided.

The tumbler 32 formed by a plate has a tumbler tour 34 for the customer key. It also has in the exemplary embodiment according to FIGS. 1 to 4 on its front edge section facing the locking lug 22 35 has a stop lug 36 to which a stop 38 seated on the lock bolt is assigned is. This is also provided in the construction of FIGS.

40 denotes a slot-like, accessible at the front edge section 35 Recess 40 into which the stop 38 of the lock bolt 20 can move as soon as the tumbler 32 in its release position (FIG. 4) upwards or in accordance with FIG. 7 is pivoted downwards and thereby unlocks the lock bolt 20 and in the direction Open position has been moved (Figure 4).

An energy store, preferably in the form of a leaf spring fixed to the housing 42, is based on the construction according to figures 1 to 4 on the upper and, in the case of the construction according to FIGS. 5 to 8, on the lower edge section 43 of the tumbler 32 and tries to keep the latter constantly in a ready position to hold according to Figures 3 and 5, respectively.

44 denotes an actuator arm extending from the rear edge portion 45 of the tumbler 32 extends in the direction of the locking device 18, which is behind the lock bolt 20 is arranged in a stationary manner in the housing 16.

The locking device has a pivotable about a pivot axis 46, an armature of a magnet 47 forming locking lever 48, for example is stepped cranked at its free end. This locking lever is in the lock bolt 20 assigned a slot-like recess 50, which is from the rear Front edge 52 of the lock bolt is accessible.

The pivot axis 46 of the locking lever 48 sits on one leg 54 of a, for example, U-shaped, housing-fixed carrier 56, between the legs 54 and 58, the electrically excitable magnet 47 is arranged. At 62 there is an electric one Switch referred to as a changeover switch with two switch positions, which is either on the Leg 58 of carrier 56 or held on the coil of magnet 47 in a suitable manner can be.

This switch indicates between the two switch positions and herbeweqbaren switching member 64, which by means of a switch housing at 66 hinged shift lever 68 can be actuated is. This works with the Actuating arm 44 of tumbler 32 together, which will be explained in detail below will. It should only be noted that the shift lever 68 in the construction of Figures 5 to 8, for example, by a stop 69 in FIG one switching direction is pivotable.

An energy store tries constantly to lock lever 48 in his To keep the locking position, what in the present embodiments accomplished with the aid of a tension spring 70 anchored on the leg 54 of the carrier 56 is formed with one end in one arm of the double-armed lever Locking lever 48 is hooked. In the locked position, according to the figures 3 or 5, the free end of the locking lever is above the slot-like Recess 50 at a short distance behind the front edge of the lock bolt 20 and thus forms a stop that allows the lock bolt to be pushed back into its open position prevented.

In the following, with reference to Figures 1 and 2 and 6 and 8, the unlocking device 14 actuatable by a bank key described in detail, with their help in the event of a power failure, the lock bolt 20 instead of electrical Paths can be unlocked mechanically or manually using the magnet47 is.

The unlocking device 14 has, in the view of the security lock according to Figures 1, 2 and 6 and 8 a in front of the lock bolt 20 and to this in the housing 16 slidably arranged slide 72 on, the, analogous to the tumbler located between the lock bolt 20 and slide 72 32, a slide tour 74 for a bank key that can be slipped onto the push-on pin 28 owns. With the aid of the latter, both the slide 72 can be moved into its unlocked position (Figures 2 and 8), and possibly also the tumbler 32 against the effect pivot the leaf spring 42 upwards according to FIG. 2 or downwards according to FIG. 8. For the longitudinal adjustability of the slide 72, it has a longitudinal slot 76, in which the pivot pin 30 of the tumbler 32 engages. At his the locking device 18 facing front end is the slide 72 with one in the direction of the rear Housing end wall extending actuator arm 78 equipped at its one Longitudinal edge has a Auslenknocke 80, which with the cranked end of the Locking lever 48 of the locking device 18 cooperates.

The tours 34 and 74 of tumbler 32 and slide 72 are such designed that once when turning the bank key, the slide 72, according to FIG 1, is controlled to the right in its unlocked position and inevitably the locking lever 48 by the actuating arm 78 according to Figures 2 and 8 in its Release position is pivoted and that on the other hand from the rotation of the bank key additionally a pivoting of the tumbler 32 into a release position according to FIG 2, 4 or 788 takes place, however, the lock bolt 20 when turning the bank key still maintains its closed position. In the course of moving the Slide 72 in the unlocked position required rotation of the bank key due to the pivoting of the guard locking 32, the actuator arm 44 of the tumbler 32 free the switching lever 68 of the electrical switch 62, whereby whose switching element 64 is transferred to the second switching position. After adjustment of the slide 72 in its unlocked position shown in Fig.2,4 and 7,8 then the bank customer with the customer key the lock bolt 20 in its open position move by swiveling beforehand by means of the customer key or possibly the bank key the tumbler 32 whose slot-like recess 40 is in an aligned position to the stop 38 of the lock bolt 20 and the free end piece of the locking lever 48 through the Auslenknocke 80 of the slide 72 in an aligned position to the slot-like Recess 50 of the lock bolt 20 have been brought.

A constructional difference between the two security locks described consists, among other things, in the fact that the installation position of the locking device 18 and the unlocking device 14 in both exemplary embodiments with respect to FIG the longitudinal axis of the housing 16 differs from one another by 1800.

Namely, while the locking device 18 in construction according to Figures 1 to 4 is attached to the lower edge of the housing; and accordingly the locking lever 48 of which is located above the magnet 47 is the locking device 18 held in the construction according to Figures 5 to 8 on the upper edge of the housing. Accordingly, in this type of construction, the locking lever 48 is located below the Magnets 47.

The actuating arm 78 of the slide 72 of the unlocking device is also located 14 in a plane below the locking lever 48 of the locking device 18th

This arrangement results in specific structural and functional aspects Advantages.

Thus, the actuating arm 44 of the tumbler 32 can be connected to one of the locking levers 48 facing stop cam 90, which is located in the lock bolt 20 in its closed position locking starting position of the tumbler 32 in one plane a-a is located, which ensures two things: In the event that once, for example by resinified grease, the locking lever 48 in its release position (Figures 7 and 8) should remain after de-energizing the magnet 47, this is at Closing the safety lock and the associated pivoting of the Guard locking 32 in its locking position (FIGS. 5 and 6) by stop cam 90 Forcibly controlled back into its locking position (Figures 5 and 6). Also in the event that the locking lever 48 is normally in its locking position resetting tension spring 70 should break once and thus become ineffective both by the stop cam 90 and by the heavy weight of the locking lever 48 itself ensures that it automatically moves into its locking position moved back.

Finally, the stop cam 90 allows that for manual Unlocking the lock bolt 20 with the help of the bank key exclusively the Slide 72 is to be controlled in its unlocked position (Figure 8) and thereby through the locking lever 48, the tumbler 32 positively controlled only by one such Is pivoted amount that the switch 62 in its activating the alarm device Switching state transferred, but the tumbler 32 is not fully in its release position (Figure 8) is pivoted.

The lock construction shown in FIGS. 5 to 8, to be used with preference accordingly allows the switch 62 to be switched over with only one tumbler 32 by means of a bank as well as a customer key and the forced return of the locking lever 48 in the event of a break in the tension spring 70 and / or in the event of jamming or sticking the locking lever.

The safety lock can be designed in such a way that the unlocking device by means of a customer key when the security lock is closed again reset in their, the locking of the lock causing the standby position will. In addition, the safety lock can be designed in such a way that its lock bolt, provided that the unlocking device 14 has been brought into its unlocked position is unlocked and locked as often as required, especially within a shorter period of time can be. In this case, the unlocking device must then with the bank key 14 back into its readiness position causing the locking of the safety lock be controlled back.

Details of the electrical control of the security lock according to of the invention are explained in more detail below with reference to FIGS. 9 and 10. in the FIG. 9 shows a schematic block diagram of the control in the the circuit elements that are directly part of the security lock, are surrounded by a dashed line 100. These circuit elements include in detail the excitation winding RL of the electromagnet 60, a resistor Rx and the switching contact a of the electrical switch 62. The elements mentioned are in Connected in series, one connection of the excitation winding RL to a supply voltage of + 24 V is connected, while your other connection on the one hand via the resistor Rx and on the other hand via a parallel piece of conductor L with the two changeover connections of contact a is connected. The fixed connection of contact a is over a diode D connected to the collector of a switching transistor whose emitter is connected via add another resistor Ry. Reference potential (OV). In parallel with the resistance Ry is the switching path of a further transistor T2.

The common circuit point S of the two transistors T1 and T2 and the resistor Ry is also connected to the inverting one via a resistor 1o2 Input (-) of an operational amplifier fed back via a feedback resistor 104 106 connected.

The non-inverting input (+) of operational amplifier 106 is connected to the tap of a voltage part of resistors 108, 110, which between Reference potential (OV) and supply voltage (+24 V) are present. In parallel with the operational amplifier 106 is a second operational amplifier 116 with corresponding associated resistors 112, 114 and 118, 120. The outputs of the operational amplifiers 106 and 116 are with A and B respectively. Furthermore, the base terminal ″ of the second transistor T2 denoted by the reference character C.

The control according to FIG. 9 operates on the assumption that the first transistor T1 is turned on or switched on, which is periodic is the case because the said transistor is part of a multiplex 122, for evaluating the switching position of contact a of electrical switch 62 in principle according to a measuring method in which essentially the voltage drop at which resistance Ry is evaluated. In detail, the amount of voltage on Circuit point S provided that the resistance of the conductor L is negligibly small in the indicated rest position of the changeover contact a determined by the division ratio RL + Rx: Ry and in the working position of the Changeover contact a by the division ratio RL: Ry. On condition that Rx = Ry and RL + Rx results at switching point S for the rest position of the Contact a voltage of about 12 volts while looking for the working position of contact a results in a voltage of almost 24 volts. In the event of a line interruption, as it can occur, for example, through unauthorized manipulation of the control, the voltage at the node S goes to zero volts. These three possible voltage values at the circuit point S can by appropriate dimensioning of the external circuit the operational amplifier 106, 116 can be distinguished in such a way that at the output A signal appears when the voltage is greater than 10 volts and that at the output B a signal appears when the voltage is greater than 20 volts.

Overall, the control according to FIG. 9 enables monitoring the operating states shown in the following table.

a signal idle Working hours A B II H L compartment closed B H H compartment open alarm, if not free-X X L L broken wire H L L solenoid control H 4-24 V L 12 V X 0V If the second transistor T2 is applied by applying a corresponding Signal to its base terminal C is controlled conductive, what to prepare for an opening of the safe lock is carried out by the control center and, if so, then the Contact a is put into its working position - by using the customer key -which bridges the resistor Rx with the conductor L and if finally the first transistor Tl in the multiplexer is turned on, then that of the multiplexer selected circuit low resistance, so that now through the excitation winding RL a current can flow, so that the locking bolt, which is designed as an armature, is in his Release position is moved.

The decision whether there is an open compartment or a line break according to line 2 or 3 of the above table an alarm is triggered or not, takes place taking into account the data stored in the central office, the central office or the central control unit, preferably with a microprocessor and corresponding Storage facilities is equipped.

Without going into more detail here on the structure of the headquarters should, it should be noted that the monitoring is basically after Closed-circuit principle he follows. The signals at outputs A and B are constantly synchronized with the sampling of the individual locks in a multiplex process with the content of a data memory compared. The data stored in the data memory correspond to the target state of the system, while the signals determined with the circuit according to FIG Outputs A and B reflect the actual status of the system. If now the target state differs from the actual state, the comparison of the signals at outputs A. and B with the stored data for an alarm. When opening a locker or when the security lock according to the invention is opened, the triggering an alarm can only be avoided by preparing the relevant Operation corresponding data are entered into the data memory, which is via a Input keyboard takes place, which can only be operated by bank staff. Should for example the triggering of an alarm can be avoided for a specific lock, the Corresponding lock or compartment number on the input keyboard in the data memory entered. This gives the electronic control the instruction to the person concerned Lock assigned signals to be treated separately in such a way that the second Transistor T2 is switched through via its base terminal C when at the two Outputs A and B, the signal level H occurs.

From Figure 1o of the drawing it is finally clear that in the Monitoring a large number of locks 100.1, 100.2 ... loo.n a summary the locks are made into groups of 8, for example, which are multiplexed cyclically applied to the supply voltage +24 V via third transistors T3, during the corresponding locks in the individual groups, for example locks loo.1 and 100.9 each common second Transistor T2 of multiplexer 122 is assigned. The between reference potential (OV) and the circuit point S lying circuit part of Figure 9 is all Locks lot.1 to loo.n together.

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Claims (15)

P a t e n t a n 5 p r ü c h e X Security lock, especially safe lock, with a housing, with one arranged in this and with a customer key actuatable locking mechanism for actuating a lock bolt, with at least one having a magnet and automatically holding in their locking position Locking device for locking the lock bolt in its closed position, which can be controlled by energizing the magnet in its release position and in this is automatically held when the lock bolt is moved into its open position, with at least one arranged in the housing and actuatable when the locking mechanism is opened electrical switch, inE »s3nixe with one that can be operated by a bank key Unlocking device for mechanically unlocking the locking device, d a d u r c h e k e n n n z e i c h n e t that the electrical switch (62) when Opening the locking mechanism (12) at least before transferring the lock bolt (20) into its final open position can be actuated to close a circuit. 2. Safety lock according to claim 1, characterized in that the electrical switch (62) in a known manner from a first switching state can be transferred to a second switching state and its automatic after release assumes the first switching state again. 3. Safety lock according to claim 1 or 2, characterized in that that the electrical switch (62) is a microswitch in a known manner. 4. Safety lock according to one of the preceding claims, characterized characterized in that the electrical switch (62) and the magnet (60) are a structural unit form. 5. Safety lock according to claim 4, characterized in that the unit formed by the electrical switch (62) and magnet (60) in the housing (16) is arranged behind the lock bolt (20). 6. Safety lock according to one of the preceding claims, characterized characterized in that the electrical switch (62) by at least one tumbler (32) of the closing mechanism (12) can be actuated. 7. Safety lock according to one of the preceding claims 4 to 6, characterized in that the tumbler which actuates the electrical switch (62) (32) of the locking mechanism (12) protruding from the rear and with the Has switch (62) cooperating actuating arm (44). 8. Safety lock according to claim 7, characterized in that the actuating arm (44) having tumbler (32) in a known manner by a Pivot axis (30) is pivotable. 9. Safety lock according to claim 8, characterized in that the guard locking (32) when the safety lock is opened its bolt (20) before and when closing this lags 10. Security lock after one of the preceding claims 7 to 9, characterized in that the locking device (18) when closing the security lock by part of the latter zwangsgesteue.rt can be reset from its unlocked position into its locked position. 11. Safety lock according to claim 10, characterized in that the locking device (18) for locking and unlocking the lock bolt (2c) has a pivot lever (48) as a locking member, which is an energy storage device, in particular tension spring (70), tries to keep constantly in its locking position and once, both by the magnet (47) and by the unlocking device (14) can be pivoted into its unlocked position and, on the other hand, through the actuating arm (44) of the tumbler (32) can be driven back into its locking position in a positively controlled manner is. 12. Safety lock according to claim 11, characterized in that for reversing the switch (62) from its one switching state to its other Switching state serving tumbler (32) when moving the locking device (18) into the unlocked position by the unlocking device which can be actuated by means of the bank key (14) or is positively pivotable by the bank key itself. 13. Safety lock according to claim 11 or 12, characterized in that that the pivot lever (48) of the locking device (18) one Forms the armature of the magnet (67) and its installation position in the housing (16) is such that that the pivot lever (48) is below the magnet (47). 14. Safety lock according to one of the preceding claims 1 to 5, characterized in that the electrical switch (62) at least indirectly can be actuated by the lock bolt (20). 15. Safety lock according to one of the preceding claims 1 to 5, characterized in that the electrical switch (62) directly through the Customer key is operable.