EP0779404A2 - Security lock - Google Patents

Abstract

The security lock has an electro-mechanical bolt (2), which can be operated by an electromagnet or an electric motor, and which can also be operated mechanically by a key and tumbler mechanism, especially in the event of a power failure. The electro-mechanical operation of the bolt can also be released by a switch (17), which can be operated by a component of the tumbler mechanism which can only be moved by a key (S2) with a matching shape. The mechanism may have lock tumblers (6) which are operated directly by the key, and may have barrier tumblers (7) which are arranged on a shaft (8). The latter tumblers can be connected to the lock tumblers by couplings (6b,7a), and can move with the shaft relative to them, in order to operate the switch.

Description

The invention relates to a security lock with an electromechanical lock that can be actuated, for example, by an electromagnet or electric motor, which can also be actuated mechanically by a key in the event of malfunctions, in particular a power failure, via a tumbler.

Security locks of the type described above are known in particular for prisons. They are operated electromechanically by an operator in a control center. The operation on site can only be carried out mechanically with the help of a suitable key.

If the known security locks are used in passage doors, which are passed relatively frequently by authorized persons, there is either a heavy load on the head office or an awkward key operation in individual cases.

The invention is therefore based on the object of developing the known security lock in such a way that it can be actuated electro-mechanically while maintaining the necessary security on site, ie independently of the control center.

The solution to this problem by the invention is characterized in that the electromechanical actuation of the bolt can additionally be triggered by a switch which can be actuated by a part of the tumbler mechanism that can only be moved by a key with a suitable lock.

As a result of the further development of the security lock according to the invention, it can thus be actuated electro-mechanically by an authorized person directly at the door, independently of the control center, without the need for a full mechanical opening of the lock, although the authorized person does not have the option of to carry out such a change in the case of a security lock with switchable tumblers. By switching off the current, if necessary, it can be ensured that an electro-mechanical actuation on site is not required.

According to a further feature of the invention, the tumbler comprises locking tumblers operated directly by the key and locking tumblers arranged on a tumbler shaft, which can be coupled to the tumbler shaft when the locking tumblers are properly arranged and can be coupled relative to the tumbler shaft with the tumbler shaft, which in turn actuates the switch. In this case, the closure of the tumbler mechanism can preferably be changed in a manner known per se by differently setting each locking tumbler on a retaining pin.

According to a further feature of the invention, the angle of rotation of the key which triggers the electro-mechanical actuation of the bolt is limited. In a preferred embodiment of the invention this is achieved in that in the lock housing, i.e. a stop protruding into the range of movement of the key is arranged on the lock plate or on the lock cover.

In order to enable a purely mechanical lock actuation in spite of such a limitation of the angle of rotation of the key which triggers the electro-mechanical actuation of the bolt, the invention finally proposes to provide a key provided for the mechanical actuation of the lock with a recess corresponding to the stop .

Fig. 1

eine Ansicht des in der Schließstellung befindlichen Schlosses mit ausgeschlossenem und gesperrten Riegel bei geschlossener Tür,

Fig. 2

eine der Fig. 1 entsprechende Sicht des in der Öffnungsstellung befindlichen Schlosses mit elektro-mechanisch zurückgezogenem Riegel bei noch in der Schließstellung befindlicher Tür,

Fig. 3

eine der Fig. 2 entsprechende Darstellung bei geöffneter Tür, jedoch elektro-mechanisch zurückgezogenem Riegel,

Fig. 4

eine weitere Ansicht des Schlosses bei geöffneter Tür gemäß Fig. 3, jedoch ausgeschobenem Riegel,

Fig. 5

eine der Fig. 2 entsprechende Ansicht des Schlosses, dessen Riegel elektro-mechanisch aufgrund einer Schlüsselbetätigung zurückgezogen worden ist, bei noch verschlossener Tür,

Fig. 6

eine weitere Darstellung des Schlosses nach Zurückziehen des Riegels mit Hilfe des mechanischen Schließwerkes, wiederum bei noch verschlossener Tür,

Fig. 7

eine Draufsicht auf das mit zwei mechanischen Schließwerken versehene Schloß,

Fig. 8

einen Längsschnitt durch das Schloß gemäß der Schnittlinie VIII - VIII in Fig. 1,

Fig. 9

eine der Fig. 7 entsprechende Draufsicht auf das in eine Tür eingebaute Schloß beim Schließen der Tür, und zwar beim Auftreffen auf ein am Türrahmen angeordnetes Schließblech,

Fig. 10

eine der Fig. 9 entsprechende Darstellung bei fortschreitender Schließbewegung der Tür,

Fig. 11

ein Ausführungsbeispiel eines Schlüssels zur elektro-mechanischen Betätigung des Schlosses und

Fig. 12

ein Ausführungsbeispiel eines Schlüssels für die mechanische Betätigung des Schlosses.

An exemplary embodiment of the security lock according to the invention is shown in the drawing, namely:

Fig. 1

a view of the lock in the closed position with the bolt locked and locked when the door is closed,

Fig. 2

1 corresponding view of the lock in the open position with electro-mechanically retracted bolt with the door still in the closed position,

Fig. 3

2 shows a representation corresponding to FIG. 2 when the door is open, but the electromechanically retracted bolt,

Fig. 4

3 shows another view of the lock with the door open according to FIG. 3, but with the bolt pushed out,

Fig. 5

2 corresponding view of the lock, the bolt of which has been withdrawn electromechanically due to a key actuation, with the door still locked,

Fig. 6

another representation of the lock after pulling back the bolt with the help of the mechanical locking mechanism, again with the door still closed,

Fig. 7

a plan view of the lock provided with two mechanical locking mechanisms,

Fig. 8

2 shows a longitudinal section through the lock according to section line VIII - VIII in FIG. 1,

Fig. 9

7 shows a plan view corresponding to FIG. 7 of the lock installed in a door when the door closes, namely when it strikes a striking plate arranged on the door frame,

Fig. 10

9 shows a representation corresponding to FIG. 9 as the door continues to move,

Fig. 11

an embodiment of a key for electro-mechanical actuation of the lock and

Fig. 12

an embodiment of a key for the mechanical actuation of the lock.

The lock shown in the view without a lock cover comprises a lock plate 1, which is provided with a faceplate 1a and with a total of four threaded bushings 1b for fastening the lock cover, not shown. On the lock plate 1 a bolt 2 is slidably mounted, which is guided with its bolt head 2a in a recess in the face plate 1a and by means of an elongated hole on a bearing pin 1c, which is arranged on the lock plate 1. Due to a ramp 2b on the bolt head 2a, the bolt 2 is designed as a latch bolt. In the closed position, the bolt head 2a of the bolt 2 engages in a recess in a strike plate 3, which is attached to a door frame 4 according to FIGS. 9 and 10.

The latch 2 can be actuated either electro-mechanically or by a key-operated mechanical locking mechanism. In the embodiment shown in the drawings, a solenoid 5 is provided for electro-mechanical actuation. The mechanical locking mechanism comprises a set of height-adjustable locking tumblers 6 arranged on the lock plate 1 and an associated set of convertible locking tumblers 7, which are also height-adjustable on a tumbler shaft 8 and interact with a retaining pin 1d arranged on the lock plate 1.

For the electro-mechanical actuation of the bolt 2, which is loaded in the direction of its extended locking position by a locking spring 9, the armature 5a of the lifting magnet 5 interacts with a retraction lever 10, which is pivotably mounted as a two-armed lever on a bearing pin 1e of the lock plate 1. During a pivoting movement of the retraction lever 10 in the clockwise direction by energizing the solenoid 5, the upper part of the retraction lever 10 comes into contact with a driving mandrel 2c of the bolt 2, so that it can be moved from its extended locking position into a release position with the aid of the solenoid, as it is for example, is shown in FIGS. 2 and 3.

In order to prevent unauthorized pushing back of the bolt 2 into this release position, a locking slide 11 is provided, which is displaceably mounted transversely to the direction of movement of the bolt 2 by means of elongated holes on bearing pins 1f of the lock plate 1. This locking slide 11 carries on its underside a locking pin 11a, which cooperates with a projection 2d of the bolt 2.

To actuate the locking slide 11, a trigger element 12 is provided, which in turn is slidably mounted on the catch pin 2c on the one hand via elongated holes and on the other hand on a bearing pin 2e of the bolt 2 in the longitudinal direction thereof. The trigger element 12 is provided with a control surface 12a for a driving pin 11b arranged on the locking slide 11, so that a movement of the locking slide 11, which moves the locking pin 11a out of the range of motion of the projection 2d, takes place by a relative movement of the trigger element 12 to the bolt 2 that the bolt 2 can be moved between its end positions.

To actuate the locking slide 11, which is loaded by a spring 11c in the direction of its locking position, with the aid of the control surface 12a formed on the trigger element 12, a stop mandrel 12b is arranged on the trigger element 12, which, when the retraction lever 10 is pivoted clockwise, in front of the driving mandrel 2c of the bolt 2 is gripped by the retraction lever 10, so that during an electro-mechanical retraction movement of the bolt 2, the locking slide 11 is first raised and thus the locking between the locking mandrel 11a and the projection 2d is released before a retraction force is exerted on the bolt 2 via the driving mandrel 2c. In order to monitor the respective position of the bolt 2, a limit switch 13 is provided in the exemplary embodiment. The respective position of the locking slide 11 is also monitored by a further limit switch 14.

In order to withdraw the bolt 2 with the aid of the lifting magnet 5 in an electromechanical manner with the door closed from the locked position shown in FIG. 1 into its release position according to FIG. 2, the lifting magnet 5 is energized. As a result, its armature 5a is pulled back into the housing, as a result of which the pull-back lever 10 is pivoted clockwise. Here, the trigger element 12 is first relative to the bolt via the stop pin 12b 2 moved so that the control surface 12a lifts the locking slide 11, whereby its locking pin 11a releases the projection 2d of the bolt 2. Due to the further pivoting movement of the retraction lever 10, the latch 2 can thus be retracted into its release position according to FIG. 2 via the driving mandrel 2c. Due to the force of the spring 11c, the locking slide 11 returns to its locking position, as shown in FIG. 2.

If the door provided with the lock is now opened, a control wedge 15 comes into operation, which is arranged parallel to the bolt 2 and, like this, with its head 15a in a recess in the face plate 1a and by means of an elongated hole on a bearing pin 1g of the lock plate 1 is stored. The control wedge 15 is also formed with a run-up slope 15b and is loaded in the extension direction by a compression spring 16.

While the control wedge 15 rests with its end face on the striking plate 3 of the door frame when the door is closed according to FIG. 2, it is moved forward when the door is opened due to the compression spring 16, as shown in the illustration in FIG. 3. Here, the control wedge 15 lifts the locking slide 11 against the force of the spring 11c by means of an elevation 15d formed between two recesses 15c, as shown in FIG. 3. In this raised position of the locking slide 11, its locking pin 11a releases the projection 2d of the bolt 2, so that it arrives due to the locking spring 9 loading it from the position shown in FIG. 3 to the position shown in FIG. 4, in which the locking head 2a of the latch 2 is in the extended position. Since the solenoid 5 is no longer energized, the retraction lever 10 also returns to its starting position according to FIG. 1 by a pivoting movement directed counterclockwise, as is also shown in FIG. 4.

When closing the door with the extended position of bolt 2 and control wedge 5 shown in FIG. 4, the run-up slope 15b of the control wedge 15 according to FIG. 9 first hits the stepped striking plate 3. As a result, the nose 11d of the locking slide 11 lying in the rear recess 15c of the control wedge 15 is raised until it rests on the elevation 15d of the control wedge 15 according to FIG. 3. In this raised position, the locking pin 11a of the locking slide 11, the projection 2d of the rain 2 free, so that when the run-on slope 2b of the bolt 2 subsequently hits the striking plate 3 according to FIG. 10, the bolt 2 is pushed back against the force of the locking spring 9 from the position according to FIG. 4 into the lock becomes. The door can be closed in a simple manner without actively operating the latch 2. As soon as the door assumes its closed position relative to the door frame 4, the bolt 2 arrives in the recess in the striking plate 3 provided for the bolt head 2a due to the force of the locking spring 9 loading it, so that the bolt 2 again assumes the locking position shown in FIG. 1. The control wedge 15 rests with its end face according to FIG. 1 on the striking plate 3. Since the nose 11d of the locking slide 11 lies in the front recess 15c of the control wedge 15, the locking pin 11a prevents the bolt 2 from being pressed back unauthorizedly with the aid of the projection 2d. The lock is again in the locking position shown in FIG. 1, from which it can be transferred to the release position either by an electro-mechanical actuation using the lifting magnet 5 or by means of a purely mechanical actuation using a key.

Such a purely mechanical actuation of the lock will be explained below with reference to FIG. 6. This illustration shows a key S1 inserted into a key guide hole 1h in the lock plate 1 (see FIG. 1), which - with correct locking, ie design of the key bit - via the tumbler channels 6a, the locking tumblers 6 during a rotation of the kind shown in FIG. 1 Starting position has raised that their coupling projections 6b were exactly in front of the coupling recesses 7a of the locking tumblers 7 fixed on the bearing pin 1g. Due to this correspondence between the coupling projections 6b of the locking tumblers 6 and the coupling recesses 7a of the locking tumblers 7, by further turning the key S1 via the tumbler lock 8a of the tumbler shaft 8 with the locking tumblers 7 arranged on it from the one shown in FIG 6 drawn position can be withdrawn. In this case, the tumbler shaft 8 took the retraction lever 10 with it, which carried out a limited pivoting movement in a clockwise direction. This pivoting movement led via the stop mandrel 12b to a withdrawal movement of the trigger element 12, which in turn raised the locking slide 11 and thus the Release latch 2 for a retraction movement. If, with a further retraction movement of the tumbler shaft 8, the latter came into contact with the lower part of its rear edge against a stop 2f of the bolt 2, the retraction movement of the tumbler shaft 8 generated by further turning of the key S1 simultaneously caused the bolt 2 to be withdrawn from the in Fig. 1 shown in the release position of FIG. 6. The door can now be opened.

Even when opening the door, i.e. when the control wedge 15 is released, the tumbler remains in the position shown in FIG. 6, because the tumbler shaft 8 of the lowered tumbler 6 according to a locking pin 8c arranged thereon, which engages in an H-shaped recess 6c in the tumbler 6 Fig. 6 is held.

To push out the bolt 2, it is necessary to turn the key S1 shown in FIG. 6 counterclockwise, so that the locking tumblers 6 and with them the locking tumblers 7 are raised and the tumbler shaft 8 via its tumbler lock 8a into the position according to FIG. 1 is returned, in which a separation between locking and closing tumblers 7 and 6 has taken place. The latch 2 is carried along by the force of the latch spring 9.

Since in the illustrated embodiment the lock is equipped with an adjustable tumbler, the key S1 in the position shown in FIG. 6 can be removed and replaced by another key, so that when the lock is locked, the locking tumblers 7 with a new lock on the retaining pin 1d be filed. The lock can then only be opened with a key that has the new lock.

After a purely mechanical opening of the lock with the aid of a key S1, it is therefore necessary to move the lock into its locked position after the door has been properly closed with the aid of the key.

To make this more cumbersome closing of the door with a key-operated transfer of the lock to its locked position by an electro-mechanical actuation of the lock on site, i.e. to be able to replace independently of a control center, a switch 17 is provided in the lock, which can be actuated by a part of the tumbler that can only be moved by a key S2 with a suitable lock.

In the exemplary embodiment, this switch 17 is actuated according to FIG. 5 when the tumbler shaft 8 is withdrawn. While the circuit of the switch 17 is open in the locked position of the lock according to FIG. 1, even a slight retraction of the tumbler shaft 8 according to FIG. 5 causes the circuit to be closed, so that the solenoid 5 can be energized via the switch 17 to the to achieve the above-described electro-magnetic transfer of the lock from its locked position to the release position.

In order to effect this slight retraction of the tumbler shaft 8 from the initial position according to FIG. 1 into the position according to FIG. 5, a key S2 according to FIG. 11 is used. This key S2 has the same lock, ie the same double-sided key bit as the key S1 according to FIG. 12, which was used in the purely mechanical actuation of the lock explained above. With the key S2 there is a proper lifting of the locking tumblers 6, so that when the key S2 is turned further, the locking tumblers 6 interact with the locking tumblers 7 and the tumbler shaft 8 is shown in FIG. 5 via its tumbler lock 8a with the aid of the key S2 Position can be withdrawn, in which the switch 17 triggers an energization of the solenoid 5. A further retraction of the tumbler shaft 8 by the key S2 is prevented by the fact that a pin-shaped stopper 1i is provided on the lock plate 1 in the region of the tumbler channels 6a, which prevents further turning of the key S2. The key S2 can thus only be used for an electro-mechanical actuation of the lock; A purely mechanical retraction of the latch 2 is not possible using the key S2.

In order to enable a complete turning of the key S1 for a purely mechanical actuation of the lock despite the presence of the pin-shaped stop 1i in the tumbler channels 6a, this key S1 is provided with a recess a corresponding to the stop 1i according to FIG.

The switch 17 actuated with the aid of the key S2 by the tumbler shaft 8 thus enables an electro-mechanical actuation of the lock via the solenoid 5 without the opening by a remote control center or by a full mechanical actuation of the tumbler mechanism. The above-described design of the bolt 2 as a latch bolt with a ramp 2b enables the door to be closed by simply pressing it shut. Since the electromechanical actuation of the lock with the aid of the key S2 presupposes that this key S2 has the correct locking, the electromechanical actuation of the lock takes place on site while maintaining the same security as the purely mechanical actuation with the aid of the key S1.

The driving mandrel 8b arranged on the tumbler shaft 8, which interacts with the side of the return lever 10 opposite the actuating surface for the stop mandrel 12b and the mandrel 2c, results in a very simple coupling between the mechanical, key-operated tumbler mechanism of the lock and the one belonging to the electromechanical actuation Retraction lever 10 or the bolt 2. The construction described allows a separation between the drive mandrel 8b belonging to the mechanical tumbler and the retraction lever 10 when electromechanically actuated and on the other hand creates an indirect connection via the retraction lever 10 between the mechanical tumbler and the bolt 2 with purely mechanical actuation of the lock using the key S1.

Because of this coupling, as in the exemplary embodiment, it is possible to arrange a second locking mechanism which can be operated from the other door side, as shown in FIGS. 8 to 10, on the opposite side of the door. The exemplary embodiment is a further lock corresponding to the lock described above, the tumbler shaft 8 'according to Fig. 8 is provided via an angle piece 18 with a driving mandrel 18a, which protrudes through a recess 1k in the lock plate 1 and, like the driving mandrel 8b, cooperates with the retraction lever 10. The door can thus be opened either electro-mechanically or purely mechanically by one of the two locks, the two locks being able to have the same or a different lock; in both cases the keys S1 and S2 can be designed with asymmetrical key bits.

Reference symbol list:

1

Lock plate

1a

Forend

1b

Threaded bush

1c

Bearing pin

1d

Retaining pin

1e

Bearing mandrel

1f

Bearing pin

1g

Bearing pin

1h

Key guide hole

1i

attack

1k

Recess

2nd

bars

2a

Bolt head

2 B

Ramp

2c

Driving mandrel

2d

head Start

2e

Bearing pin

2f

attack

3rd

Striking plate

4th

Door frame

5

Solenoid

5a

anchor

6

Locking tumbler

6a

Tumbler channel

6b

Coupling projection

6c

Recess

7

Locking device

7a

Coupling recess

8th

Tumbler shaft

8th'

Tumbler shaft

8a

Deadlock

8b

Driving mandrel

8c

Locking pin

9

Deadbolt

10th

Retraction lever

11

Gate valve

11a

Locking pin

11b

Driving pin

11c

feather

11d

nose

12th

Release element

12a

Control surface

12b

Stop mandrel

13

Limit switch

14

Limit switch

15

Control wedge

15a

head

15b

Ramp

15c

deepening

15d

Survey

16

Compression spring

17th

counter

18th

Elbow

18a

Driving mandrel

S1

key

S2

key

a

Recess

Claims (6)

Security lock with an electromechanical bolt which can be actuated, for example by an electromagnet or electric motor, which can also be actuated mechanically by a key in the event of malfunctions, in particular a power failure, via a tumbler.
characterized,
that the electro-mechanical actuation of the regulator (2) can additionally be triggered by a switch (17) which can be actuated by a part of the tumbler that can only be moved by a key (S2) with a suitable lock. Security lock according to Claim 1, characterized in that the tumbler mechanism includes locking tumblers (6) actuated directly by the key (S2) and locking tumblers (7) arranged on a tumbler shaft (8) which, when the locking tumblers (6) are properly arranged, are arranged via couplings (6b, 7a) can be coupled with the locking tumblers (7) and can be displaced relative to the locking tumblers (6) with the tumbler shaft (8), which in turn actuates the switch (17). Security lock according to Claims 1 and 2, characterized in that the locking of the tumbler mechanism can be changed in a manner known per se by differently setting each locking tumbler 7 on a retaining pin (1d). Security lock according to one of Claims 1 to 3, characterized in that the angle of rotation of the key (S2) which triggers the electro-mechanical actuation of the bolt (2) is limited. Security lock according to Claim 4, characterized in that a stop (1i) projecting into the range of movement of the key (S2) is arranged in the lock housing. Security lock according to claim 5, characterized in that a key (S1) provided for the mechanical actuation of the lock is provided with a recess (a) corresponding to the stop (1i).

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