EP0315766B1 - Device for locking entrance doors by activating a burglar alarm installation - Google Patents

Description

The invention relates to a device for locking entrance doors when arming an intruder alarm system, wherein a door must be locked for arming the intruder alarm system, and the state of the other doors is monitored electrically, and a block magnet is provided for additional electrical locking.

From DE-OS 35 03 933 a lock and block lock with an integrated code lock is known. This locking and block lock contains a block magnet that prevents mechanical unlocking when the alarm system is activated. The block magnet can only be actuated if a secret code combination is entered correctly, so that mechanical unlocking is made possible. The alarm system is activated or deactivated at the same time. This lock and block lock with integrated code lock is built into the door, the cylinder lock being designed in a special way, so that an additional turning range is available, which enables the entry of code numbers. It is not described in this laid-open document in which way additional doors can be additionally secured automatically.

An electric lock security is known from DE-PS 433 321 according to the preambles of claims 1 and 2. This is intended to secure the lock of a hotel room door when the hotel guest is absent. An electromagnet is switched on when the hotel guest surrenders his key. For this purpose, the room key is hung on a hook, which actuates a contact to close the circuit for the electromagnet. The electromagnet is then continuously flowed through by the current and attracts an anchor, its extension engages in a notch of the lock bolt. This arrangement is in each case an individual security device for doors, light signals indicating that the electric lock security device has been actuated. These light signals must therefore be available for each individual door. This means a lot of work, and with a large number of rooms, a large area is required for the display and for the key hooks. In order to recognize that a door is forcibly opened when the lock lock is switched on, the lamp signals would have to be continuously monitored because an alarm system is not provided.

An object of the invention is to provide a device for locking entrance doors when arming an intrusion detection system, which makes it possible to automatically lock additional doors when the intrusion detection system is armed.

Another object of the invention is that it should not be necessary to additionally lock a closed door, in which only the lock latch is engaged, when an intrusion detection system is armed.

To solve these problems, features are provided as specified in claims 1 or 2.

It is thus advantageously achieved that the door locks can be kept unchanged, as they are offered commercially. The entire arrangement is located in the door frame, so that no significant changes need to be made to the door itself. In the embodiment according to claim 2, it is sufficient to make a notch in the lock latch. When the alarm system is armed, all other doors, the frames of which are equipped with the device, are additionally locked by an electromagnetically operated slide.

• Figur 1 eine Schnittzeichnung der in eine Türzarge eingebauten Vorrichtung und den dazugehörigen Teil einer Tür mit Stahlbolzensicherung
• Figur 2 eine Schnittzeichnung der in eine Türzarge eingebauten Vorrichtung und den dazugehörigen Teil einer Tür mit Schloßfallensicherung
• Figur 3 eine Schaltungsanordnung zur Steuerung der Einbruchmeldeanlage und der Elektromagnete

An embodiment of the invention is explained below with reference to drawings.
It shows:

• Figure 1 is a sectional drawing of the device installed in a door frame and the associated part of a door with steel bolt lock
• Figure 2 is a sectional drawing of the device installed in a door frame and the associated part of a door with lock latch
• Figure 3 shows a circuit arrangement for controlling the intrusion detection system and the electromagnets

FIG. 1 shows the outlines of a door lock which, in a known manner, has an insert for a door handle and an insert for locking cylinders, as is shown in somewhat more detail in FIG. In the striking plate of the door frame Z, the lock latch F and the bolt R also protrude in a known manner. The latch R has two closed positions and a rest position, which is assumed when the door is unlocked. If the bolt is inserted into the frame by turning the key once or twice, as shown in the drawing, a bolt contact RK is actuated. The burglar alarm system EMA can recognize which doors T are locked by the switch position of the bolt contact RK. To actuate the bolt contact, a contact piece KS is provided which, via a lever H, causes this contact to switch only when the door T is closed. The contact piece KS is guided by guide bolts FB, so that a straight-line movement is guaranteed when the door is properly closed or unlocked.

In addition to the mechanism described so far, a slide S is provided in the upper region of the lock, which can be actuated electromagnetically. The slide S is moved downward by a current pulse on the locking electromagnet VE, so that a steel bolt STB is pressed into the door T via a lever arm HA. The release of the door T is effected electromagnetically in that a current pulse is applied to the unlocking electromagnet EM, as a result of which the slide S is moved upward and pulls the steel bolt STB out of the door T. This happens automatically when the arming of the burglar alarm system EMA is canceled. When the door is subsequently unlocked, i.e. when the bolt R is pushed all the way back, the bolt contact opens, which disarms the intrusion detection system. As a result, a current pulse is then applied to the unlocking electromagnet EM in this and in all other doors, so that the locking by the steel bolt STB is released by the upward movement of the slide S.

The embodiment of the device shown in FIG. 2 also contains a locking electromagnet VM and an unlocking electromagnet EM, with which a slide S can be moved. Attached to this slide S is a nose N which engages directly in the lock latch F when the door T is electromagnetically locked, and holds it in the locked state. In this state, the lock latch F can no longer be moved, and the door can no longer be opened with it. The release of the lock latch is effected electromagnetically in that a current pulse is applied to the unlocking electromagnet EM, as a result of which the slide is moved upwards and releases the lock latch F. This happens automatically when the arming of the burglar alarm system EMA is canceled. However, the slider S can also be pressed mechanically by the contact piece KS when the door lock is closed twice. The lock latch F is released. When the door is subsequently unlocked, i.e. when the bolt R is pushed back completely, the bolt contact opens, which deactivates the arming of the burglar alarm system EMA. As a result, a current pulse is applied to the unlocking electromagnet EM in all other doors, so that the lock latch F is released by the upward movement of the slide S.

If an unauthorized opening of the door T is attempted through manipulation or the use of force, the guide bolts FB of the contact piece KS deform in such a way that the bolt contact RK remains closed in any case. This maintains the arming of the intrusion alarm system so that an alarm can be given.

The circuit arrangement shown in FIG. 3 serves to ensure the electrical interaction of the burglar alarm system EMA and the device installed in the door frame Z. First, it describes what procedures are required to arm the intrusion alarm system EMA. Arming can only be carried out if all latch contacts FK (see FIGS. 1 and 2) actuated by the latch latch are closed. If arming is desired, a button TA is pressed, which places a potential on a line AQ leading to the burglar alarm system EMA. After releasing the TA button, the burglar alarm system EMA checks whether all latch contacts FK are closed. This is done by querying the monitoring line ÜW assigned to each door frame Z. However, these lines can also be combined to form a line, with the intrusion alarm system EMA having to determine whether a predetermined current or voltage value is present, by which it can be recognized whether all latch contacts FK are closed. If this test leads to a positive result, an acknowledgment signal in the form of a pulse is given to an electroacoustic transducer W, the sound of which signals the readiness for arming of the burglar alarm system EMA. Now one of the door locks can be closed. The control panel is armed via the bolt contact RK. By the arming is acknowledged with an acknowledgment pulse, this acknowledgment pulse likewise being made audible by the electroacoustic transducer W. At the same time, this acknowledgment pulse arrives at an open AND gate G2, which actuates all locking electromagnets VM. As a result, as described above, all other doors are automatically locked.

If the arming of the burglar alarm system EMA is to be canceled again, the door lock must be unlocked properly on a door T equipped with the device according to the invention. The RK bolt contact opens and the burglar alarm system EMA detects this when the surveillance line ÜW is polled. An acknowledgment pulse is then emitted, which, however, first reaches a bistable flip-flop FF and tilts it into the working position. As a result, the previously opened AND gate G2 is closed and a further AND gate G1 is opened, so that this acknowledgment pulse can reach the unlocking electromagnets EM of all doors T which are connected in parallel. Thus, as previously described, all other doors T are released.

Disarming the burglar alarm system EMA does not necessarily have to take place from the same door T from which the arming was initiated. If such a door was not previously locked by the bolt R, it must first be achieved by closing the lock that the bolt contact RK is actuated. If this contact RK is then opened again when the door is unlocked, the burglar alarm system EMA switches off. The locks on all other doors are released.

If a malfunction or a power failure occurs in the circuits leading to the electromagnets, it is also possible in the embodiment according to FIG. 2 to push the slide S upwards by closing it twice. After subsequent unlocking, the door T can then be opened.

Claims (10)

1. Device for the locking of entrance doors on the activation of a burglar alarm installation, wherein for the activation of the burglar alarm installation one door must be locked and the state of all doors is electrically monitored, and wherein there is provided a block magnet, which is incorporated in the door frame, for additional electrical locking, characterised thereby that the block magnet consists of a locking electromagnet (VM) and an unlocking electromagnet (EM) and is incorporated in the door frame (Z), wherein the locking electromagnetic (VM) receives a signal on the activation of the burglar alarm installation (EMA) and in that case actuates a slide (S) which slides a steel bolt (STB) into a bore in the door (T) by way of a lever arm (HA) and prevents the opening of even an unlocked door (T) until, on the deactivation of the burglar alarm installation (EMA), an unlocking electromagnet (EM) receives a signal, whereby the steel bolt (STB) is again withdrawn by the slide (S) and the lever arm (HA).
2. Device for the locking of entrance doors on the activation of a burglar alarm installation, wherein for the activation of the burglar alarm installation one door must be locked and the state of all doors is electrically monitored, and wherein there is provided a block magnet, which is incorporated in the door frame, for additional electrical locking, characterised thereby that provided on a slide (S) actuable by electromagnets (VM, EM) is a nose (N) which engages in a notch of the lock catch (F) and prevents the opening of even an unlocked door (T) until, on deactivation of the burglar alarm installation (EMA), an unlocking electromagnet (EM) receives a signal, whereby the slide (S) again releases the lock catch (F).
3. Device according to claim 1, characterised thereby that an additional locking of the door (T) by way of the steel bolt (STB) takes place even then when the door is already locked.
4. Device according to claim 2, characterised thereby, that the lock catch (F) is even then additionally fixed when the door (T) is simply closed.
5. Device according to the claims 1 and 2, characterised thereby that provided in the door frame (2) are contacts (FK, MK, RK) for the monitoring of the closed state of the door (T), whereby the setting of the lock catch (F), of the electromagnets (EM, VM) and of the latch (R) can be recognised and that these criteria are interrogated by the burglar alarm installation (EMA).
6. Device according to the claims 1 and 2, characterised thereby, that provided in the door frame (Z) is a contact member (KS) which is guided by guide pins (FB) and pushed by the latch (R), whereby the latch contact (RK) is actuated.
7. Device according to claim 6, characterised thereby that the displaceable contact member (KS) so moves the slide (S) on repeated locking of the door (T) that the lock catch (F) is released.
8. Device according to claim 7, characterised thereby that the guide pins (FB) for the contact member (KS) have deformation zones (VB) which, when a forcible attempt at opening the door (T) occurs, effect a wedging of the contact member (KS), whereby the latch contact (RK) remains actuated.
9. Device according to the claims 1 and 2, characterised thereby that a circuit arrangement is provided, which conducts an acknowledgement signal, issued by the burglar alarm installation (EMA) when activation occurs, each time to the locking electromagnets (VM) of all door frames (Z), and that the acknowledgement signal is delivered to the unlocking electromagnets (EM) when deactivation occurs.
10. Device according to claim 9, characterised thereby that provided in the circuit arrangement is an electroacoustic transducer (W) whereby the acknowledgement signals issued by the burglar alarm installation (EMA) when activation occurs are made audible to the user.

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