EP0315056A1 - Lock with latch, access control and alarm device - Google Patents

Abstract

Arranged in the housing (1) of the lock latch is a circuit (17) of an access monitoring device with two switches (18, 19) connected in series. The first switch (18) is opened in response to the displacement of a slide (11) by means of an electromagnet (15) or by means of a key-actuated cylinder lock (16) during entry from the outside. When the door is opened as a result of key actuation, the access monitoring device does not detect authorised access and triggers the alarm. So that exit from inside takes place without the alarm being triggered, when the lock latch (3) is retracted by means of the pusher located on the inside the second switch (19) is closed, with the result that a signal for authorised exit is transmitted to the access monitoring device. By means of this arrangement, unauthorised access from outside cannot take place unnoticed via the key-actuated cylinder lock (16). <IMAGE>

Description

The invention relates to a latch lock for closing and opening a door, which are assigned to the actuation of a lock latch provided with or without additional bolts on the inside and on the outside, which are coupled with a nut part of a lock nut divided in vertical planes, whereby the nut part on the outside can be coupled to the lock latch from the outside by actuating a cylinder lock with a key or by energizing a magnet of an access control device.

Latch locks are known in many designs. In the simplest embodiment, the lock can be operated on both sides by lever handles and has no additional elements. If higher demands are placed on the strength of a latch lock, one or two additional latches can be provided with the main lock. But even in this case the latch lock can be operated from both sides of the door.

Latch locks with two different functions on the inside and on the outside are used where, for example, there should always be an escape route on the inside, while on the outside as a normal function the handle is idle and can only be used to open the door if the cylinder lock belonging to the latch lock is operated first. As a result, the handle is coupled to the lock latch via a linkage so that the door is opened when the handle is pressed down.

The actuation of the cylinder lock can also be combined with an access control system in which a magnet is arranged on the latch lock, with which the connection between the handle and the latch latch is established. However, the opening of the door using the cylinder lock is not recorded by the access control device.

From DE-PS 30 50 356 a latch bolt lock for a panic door is known, which has a split nut and opens on the inside by actuating a door handle to the outside. The nut part which is in engagement with the inside lever handle has a driver arm which acts on a panic lever which pulls the bolt when the latch is actuated. An electromagnet, the armature of which is designed as a clutch slider under the action of a return spring, pulls the clutch slider, whereby the panic lever is laterally displaced by a spring, so that the driving arm can no longer reach the panic lever and the panic function is interrupted as a result. If the electromagnet is not excited, the panic lever is pushed into the swivel area of the driver arm so that the door is opened by actuating the inside lever handle. From the outside, the door can be opened in an uncontrolled manner using a key-operated cylinder lock.

In another known device (DE-PS 30 32 086) the actuation of the latch is also interrupted by a pusher by energizing a magnet. The pusher has spring-loaded pins in the neck, which protrude into a sleeve designed as an armature of an electromagnet, the one Has a square bore, which, when the magnet is de-energized, lies on the square of a dome protruding into the lock nut and enables the lock to be actuated. When the magnet is excited, the lock actuation is interrupted by the retraction of the sleeve from the square.

The invention also starts from a latch lock which provides different functions for the inside and outside, i.e. has a split lock nut. In addition, an access control device is operatively connected to the latch lock. The object of the invention is to further develop the latch lock described at the outset in such a way that access is also controlled via the key-operated cylinder lock.

According to the invention, this object is achieved in that the opening of the door with the cylinder lock without triggering the access control device triggers an alarm device. Appropriately, in the area of the cylinder lock, a slide which can be actuated by the magnet is provided, which is operatively connected to a first switch arranged in a circuit of the access control device, the first switch opening after the opening of the door with the cylinder lock by the movement of the slide and thus because of this circuit break the alarm device triggers.

• Fig. 1 Einen schematisch dargestellten Vertikalschnitt eines Fallenschlosses und
• Fig. 2 eine schematische Darstellung der Zutrittkontrolleinrichtung

The invention is shown in the drawing in one embodiment and described below. Show it:

• Fig. 1 shows a schematically illustrated vertical section of a latch lock and
• Fig. 2 is a schematic representation of the access control device

The mortise latch lock shown in FIG. 1 has a housing 1 with an end plate 2. A lock latch 3 is mounted in the housing 1, the front end of which protrudes through an opening in the end plate 2. In the housing 1, a lock nut 4 is also rotatably mounted, which is composed of an inside nut part 5 and an outside nut part 6. A door handle (not shown) is coupled to the two nut parts 5, 6. A pressure spring 7 acts on the lock nut 4, by means of which the two nut parts 5, 6 and thus the two handles are pivoted back into the rest position after they have been actuated and held there.

The nut part 5 on the inside has a driver pin 9, to which the actuating linkages are coupled when using latch locks. A driving fork is also pivotally mounted on the driving pin 9. The driving fork 10 forms a connection between the nut part 5 on the inside and a slide 11, the end of the driving fork 10 which is further away from the driving pin 9 being connected to the slide 11 by a slot guide 12.

The slider 11 is fastened to the armature rod 13 of an electromagnet 15 and lies in the region of a key-operated cylinder lock 16. The slider 11 can be displaced in the direction of the magnet 15 either by the cylinder lock 16 or by the magnet 15.

A line 17 of the access control device shown in FIG. 2 is laid in the housing 1. In the line 17, a first switch 18 is connected in series at the slide 12 and in the area of the lock latch 3 a second switch 19 is connected. In the normal position of the slide 11, the first switch 18 is closed, while the second switch 19 is open in the closed position of the lock latch 3.

2 shows the connection of the latch lock shown in FIG. 1 with the access control device. A power supply unit 20 forms the power source, which is connected to the latch lock 24 via two lines 21, 22. A signal generator 23 is arranged in line 21. From the latch lock 24, a line 25 connects the latch lock to an alarm receiver 26.

The latch lock described works as follows:

When the inside door handle is actuated, the lock latch 3 and the driving pin 9 are moved over the inside nut part 5 for actuating any secondary latch locks. After a pusher movement of approximately 10 degrees, the second switch 19 on the latch 3 also closes. Since the first switch 18 is now also closed in this state, the closed circuit sends a message to the access control device that an authorized exit, i.e. a door opening will take place, e.g. when using the exit button.

On the outside of the door, in the normal state, when the outside lever handle is actuated, the outside nut part 7 engages in the void, so that the lock latch 3 or the latch latches remain or remain in the locking position.

The movement of the slide 11 takes place either by excitation of the electromagnet 15 or by the key-operated cylinder lock 16. The movement of the slide 11 causes the driving fork 10 to be pivoted into the actuation position. In this position, when the outside handle is actuated, the rotary movement is transmitted via the outside nut part 6 to an engagement point 27 of the driving fork 10. As a result, the driving fork 10 is moved upward, as a result of which the nut part 5 on the inside also moves is pivoted. The lock latch 3 and any secondary lock latches are drawn in by this pivoting movement, so that the door is thereby opened. The first switch 18 opens due to the movement of the slide 11. As a result, when the outside door handle is actuated, the circuit is not closed and, consequently, there is also no message to the access control device. If the door is released via the access control system, ie by actuating the magnet 15, no notification is required. However, if the door is opened by key actuation of the cylinder lock, a door monitoring switch of the access control device switches on when the door leaf is opened. However, since the access control device has not received a message about an authorized opening, when the door is opened via the door monitoring it triggers an alarm like a violent door break because the user cannot be identified and therefore cannot be logged.

Usually, no control is required to exit the interior. However, if such is desired, the same device can be provided with the slider 11, the magnet 15 and the cylinder lock 16.

Claims (5)

1.Latch lock for closing and opening a door, which are assigned to the actuation of a lock latch (3) provided with or without additional latches on the inside and on the outside door handles, which each have a nut part (5, 6) with one in one vertical plane divided lock nut (4) are coupled, the outside nut part (6) from the outside by coupling a cylinder lock (16) or by energizing a magnet (15) of an access control device can be coupled to the lock latch, characterized in that the opening of the Door with the cylinder lock (16) without using the access control device (20-33) triggers an alarm device (26). 2. Latch lock according to claim 1, characterized in that in the area of the cylinder lock (16) a slide (11) which can be actuated by the magnet (15) is arranged and which is connected to a, in a circuit (17) of the access control device (20-23). arranged first switch (18) is in operative connection, whereby after opening the door with the cylinder lock from the outside by the movement of the slide (11) the first switch (18) opens and thus the alarm device (due to the lack of an access message to the access control device) 26) triggers. 3. Latch lock according to claim 1 or 2, characterized in that a second switch (19) is arranged in the circuit (17) and is connected in series with the first switch (18), which second switch when the lock latch (3) is pulled in by the closes briefly on the inside of the nut part (5), whereby the access control device is notified of an authorized door opening. 4. latch lock according to claim 1 or 2, characterized in that the inside nut part (5) is connected to a driving arm (10) which is connected via a slot guide (18) to the slide (11) and for the outside nut part (6 ) forms a point of attack (27), which is only in the extended slide 911) due to the excitation of the magnet (15) or due to the actuation of the cylinder lock (16) in the area of the nut part (6) on the outside. 5. latch lock according to claim 3, characterized in that the second switch (19) closes only after a handle movement of about 10 degrees.

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