EP0779402A1 - Safety lock - Google Patents

Abstract

The lock has a bolt (2) which can be actuated selectively e.g. by an electromagnet (5) or motor or by a key-operated mechanism with sets of closing and locking tumblers (6,7) adjustable on a movable shaft (8). It is spring-loaded (9) and released by the upper portion of a retraction lever (10) coming up against a spike (2c) when the electromagnet is energised. To simplify the separation of the electromechanical and purely mechanical drives, a follower spike (8b) on the shaft is arranged to make contact with the side of the lever remote from the surface actuating the locking mechanism.

Description

The invention relates to a security lock with a bolt which can be actuated either electro-mechanically, for example by an electromagnet or an electric motor, or by a key-operated mechanical locking mechanism, the mechanical locking mechanism comprising at least one locking mechanism arranged on a movable locking shaft and the electro-mechanical actuation takes place via a retraction lever, which at the same time actuates a locking mechanism which at least secures the extended position of the bolt.

Security locks of the type described above are known.

Proceeding from this, the object of the invention is to further develop the known construction in such a way that, with a simple construction, despite the action on the same bolt, there is a separation between the electro-mechanical actuation on the one hand and the purely mechanical actuation by a key-operated locking mechanism on the other.

The solution to this problem by the invention is characterized in that a driving mandrel is arranged on the tumbler shaft, which bears on the opposite side of the actuating surface for the locking mechanism of the retraction lever.

By means of this proposal according to the invention, when the bolt is actuated electromechanically, there is a separation between the driving mandrel arranged on the tumbler shaft and the retraction lever, whereas a use of the key-operated locking mechanism is a purely mechanical actuation of the bolt via the return lever. The proposal according to the invention thus represents a particularly simple coupling between the two types of actuation which can be used optionally.

This clutch is a prerequisite for a further development according to the invention, according to which a second, key-operated mechanical locking mechanism, which can be operated from the opposite side of the door, is arranged with at least one tumbler set arranged on a movable tumbler shaft, the tumbler shaft of which is also provided with a driving mandrel, which in turn on the Actuating surface for the barrier opposite side of the return lever is present.

This further development according to the invention has the advantage that the security lock can be provided with two key-operated, mechanical locking mechanisms, which can either have the same or a different lock, without the beard of the associated key necessarily being symmetrical.

If the security lock according to the invention is used in passage doors which are passed relatively frequently by authorized persons, there is either a heavy load on the central unit which triggers the electro-mechanical actuation or an awkward key actuation in individual cases. In order to maintain the necessary safety on site, i.e. to enable an electro-mechanical actuation of the security lock independently of the control center, according to a further feature of the invention the electro-mechanical actuation of the bolt of the mechanical locking mechanism or mechanisms can also be triggered by a switch which is activated by a key with only one key Closure movable part of the tumbler is actuated.

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 of 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 rain 2 engages in a recess in a striking 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 adjustable 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 rain 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 displaced relative to the latch 2 via the stop mandrel 12b, so that the control surface 12a lifts the locking slide 11, whereby its locking mandrel 11a releases the projection 2d of the latch 2. Due to the further pivoting movement of the retraction lever 10, the latch 2 can thus move into its release position according to FIG. 2 via the driving mandrel 2c be withdrawn. 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 due to the loading of the control spring 9 it moves 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 releases the projection 2d of the bolt 2, so that when the ramp 2b of the bolt 2 subsequently hits the striking plate 3 according to FIG. 10, the bolt 2 counteracts the force of the bolt spring 9 from the position 4 is pushed back into the castle. The door can can be easily pressed without active actuation of 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 pin 12b to a retraction movement of the trigger element 12, which in turn raised the locking slide 11 and thus released the latch 2 for a retraction movement. If, during 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 generated by further turning of the key S1 of the tumbler shaft 8 at the same time a retraction of the bolt 2 from the illustration shown in FIG. 1 in the release position according to 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 tumblers 6 according to a locking pin 8c arranged thereon, which engages in an H-shaped recess 6c in the latch tumblers 6 Fig. 6 is held.

To slide out the bolt 2, it is necessary to turn the key 51 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 the lock in the illustrated embodiment 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.

In order to be able to replace this cumbersome closing of the door with a key-operated transfer of the lock into its locked position by an electro-mechanical actuation of the lock on site, ie independently of a control center, a switch 17 is provided in the lock 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, i.e. 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, the locking tumblers 6 are properly raised, so that when the key S2 is turned further, the locking tumblers 6 interact with the locking tumblers 7 and the tumbler shaft 8 via its tumbler lock 8a with the aid of the key S2 into that shown in FIG. 5 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 that can be operated from the other door side, as shown in FIGS. 8 to 10, on the opposite door side. The exemplary embodiment is a further lock corresponding to the lock described above, the tumbler shaft 8 'according to FIG. 8 is provided with a driving mandrel 18a via an angle piece 18, which protrudes through a recess 1k in the lock plate 1 and just 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 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 (3)

Security lock with a bolt which can be actuated either electro-mechanically, for example by an electromagnet or an electric motor, or by a key-operated mechanical locking mechanism, the mechanical locking mechanism comprising at least one tumbler set arranged on a movable tumbler shaft and the electro-mechanical actuation being effected via a retraction lever which at the same time actuates a locking mechanism securing at least the extended position of the bolt,
characterized,
that on the tumbler shaft (8) a driving mandrel (8b) is arranged, which rests on the opposite side of the actuating surface for the locking mechanism of the return lever (10). Security lock according to Claim 1, characterized in that a second, key-operated mechanical locking mechanism, which can be operated from the opposite side of the door, is arranged with at least one tumbler mechanism arranged on a movable tumbler shaft (8 '), the tumbler shaft (8') also with one on the other Actuating surface for the locking mechanism opposite side of the retraction lever (10) adjacent driving mandrel (18a) is provided. Security lock according to Claim 1 or 2, characterized in that the electromechanical actuation of the bolt (2) of the mechanical locking mechanism or mechanisms can be triggered by a switch (17) which is a part of the tumbler mechanism which can be moved only by a key with a suitable lock can be actuated.

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