EP3165696B1 - Lock with couplable lock follower - Google Patents

Description

The invention relates to a lock for a door or a window or the like according to the features of the preamble of claim 1.

In practice, so-called panic locks are often used to secure building access. These are locks that secure access to a building from the outside and at the same time allow you to leave the building from the inside at any time. In the event of an emergency or panic, the building can be left at any time.

A generic lock is from the DE43 19 325 A1 known. There is a panic lock with a two-part lock nut is described. The outer nut can be coupled via a spring-loaded nut lever. The nut lever is mounted on the inner nut and has a nose that engages in a shoulder of the outer nut for coupling. This clutch remains when the nut is actuated.

Another panic lock is out of the DE 10 2012 010 786 A1 known. There is shown a mortise lock with a lock bolt received in a lock housing and a three-part lock nut which interacts with a door handle. To uncouple a lever handle, the lock nut is constructed in three parts, with a center nut being permanently connected to the lock mechanism and via one Coupling device either an outer nut part or an inner nut part can be coupled or uncoupled.

In order to ensure the security of individual rooms in buildings, for example security of classrooms even in the event of an amok alarm, it is necessary to create a lock that enables the room to be locked under all circumstances. In the context of a hazardous situation, it can happen, for example, that endangered persons escape into a room whose access door must be lockable under all circumstances in order to prevent undesired persons from entering.

It is the object of the present invention to provide a lock which, even when the door handle is already actuated, always enables secure locking of a secure space.

This object is achieved by a lock with the features of claim 1. It is provided that a nut driver is designed as a driver lever acting directly between the outer nut and the inner nut, which is either pivotally mounted on one end on the outer nut and is supported on the other side on a support bearing arranged on the inner nut, or is pivotably supported on the inner nut at one end and is mounted on the other is supported on a support bearing arranged on the outer nut, and the driver lever uncouples the outer nut from the inner nut by a spring pivoting the driver lever into a position out of engagement with the support bearing, by the contour of the support bearing and / or the end of the driver lever cooperating with the support bearing has a beveled support surface which urges the driver lever out of engagement when the outside handle is actuated. The driver lever points, so to speak a preferred position in which the outer nut is separated from the inner nut. Even when the outside handle is actuated, that is to say in a situation in which a follower is already operating the door handle in order to open a secured space, the device according to the invention enables the outside handle to be safely uncoupled. As a result, the lock according to the invention enables the space to be secured to be securely closed even in the event of a danger situation caused by a killing spree. The lock mechanism is prevented from jamming by actuating the lock mechanism to uncouple the outer nut. The external handle can be uncoupled, for example, by actuating a locking cylinder accommodated in the lock in the closing direction. The locking cylinder can be operated in the opening direction for coupling. The lock cylinder can interact with a control element or control slide mounted within the lock housing in order to control the uncoupling or the coupling.

In this context, inside refers to the side of a door that lies in a secure room, for example a classroom in a school. In this context, the outside refers to the outside of a secured room, for example a hallway or an outside area of a building.

The lock has a lock faceplate and a lock case connected to it. Arranged in the lock case are a receptacle for a lock cylinder, a detachable lock nut, a latch or a latch bolt, and a control element which can be switched by a lock cylinder between a decoupled position and a coupled position.

The detachable lock nut has an inner nut that can be connected or connected to an inner handle and an outer nut that can be connected to an outer handle. The control element interacts with a coupling element in order to couple and / or uncouple the outer nut. The lock nut is designed as a two-part nut and has an inner nut and an outer nut. A nut middle part is not necessary. The inner nut can be permanently connected to the lock mechanism to enable the lock to be operated at any time by the inside handle. In another embodiment, the inner nut can also be designed as a detachable nut part in order to selectively couple the inner handle, i.e. to connect with the lock mechanism, or to disconnect i.e. separate from the lock mechanism.

In one embodiment, it is preferably provided that the control element is designed as a control element which can be displaced and / or pivoted transversely to the lock faceplate. The control element is bistable, i.e. it can be specifically switched between the uncoupled or the engaged position. This means that the control element has a stable position both in the uncoupled position and also has a stable position in the coupled position. The control element is preferably completely accommodated within the lock housing.

In order to secure the engaged position of the control element, it can be provided that the control element has a recess into which a resilient catch engages in the engaged position in order to fix the engaged position of the control element. As an alternative or in addition, it can also be provided that the control element has a second recess into which one is in the disengaged position spring catch engages to fix the disengaged position of the control.

In one embodiment, it can be provided that the control element is designed as a control slide which is slidably mounted in the lock case via a link guide or via an elongated hole cooperating with a pin. A safe guidance of the control element is made possible via a link guide or an elongated hole with a pin, without the control element being able to jam or get caught in an intermediate position.

The control element actuates a coupling element which interacts with the driving lever for coupling or uncoupling the outer nut. In particular, it can be provided that the coupling element is designed as a coupling slide that can be moved parallel to the faceplate, one end of which cooperates directly with the driving lever and the other end directly with the control lever.

In order to enable safe actuation of the lock from the outside when the position is engaged, it can be provided, for example, that the end of the coupling element interacting with the driving lever has a support surface or drainage surface, the contour of which is adapted to a round contour of the lock nut. The driver lever is supported in the engaged position on the support surface or drainage surface in order to prevent the outer nut from being uncoupled. The driver lever is pushed into the engaged position by the support surface or drain surface.

Since the driver lever of the lock nut has a preferred position, which means uncoupling the outer nut, the coupling element interacts with the driver lever in such a way that it remains securely coupled in the engaged position and thus prevents the outer nut from being uncoupled. In particular, it can be provided that the drainage surface or support surface extends over a circular section which is the same size or larger than the maximum rotation angle of the lock nut, preferably covering a circular section in the range of a rotation angle of 15 ° to 70 °. The coupling element thus has, so to speak, a slide bearing on which the driver lever slides, which ensures uniform support of the driver lever over the entire range of rotation of the lock nut and thereby ensures that the outer nut remains in the engaged position.

In one embodiment, it is preferably provided that the coupling element is connected to a coupling spring mounted in the lock case, which acts on the coupling element in the uncoupled position the movement path of the driver lever is led out. This allows the driver lever to swing freely to decouple the outer nut from the inner nut. I.e. the coupling element is completely led out of the path of movement of the driver lever, so that it can swing freely and thus jamming or getting stuck of the driver lever is not possible.

Advantageously, it can be provided that the coupling element is designed as a coupling slide, which is displaceably mounted parallel to the faceplate is. In the preferred installation position of the lock case, in which the faceplate extends vertically, this means that the coupling slide is not only spring-loaded, but also supported by its weight force in the uncoupled position. This enables a particularly safe disengagement of the lock.

In one embodiment, it can be provided that the control element interacts with the coupling element via a bevelled guide surface in order to displace it against the force of the coupling spring for coupling.

To open the lock from the inside, i.e. To make it possible at any time from the secured space, it can be provided that the inner nut is permanently coupled to the trap or a trap mechanism actuating the trap.

In one embodiment it is provided that the latch is designed as a lockable latch or as a latch bolt. The trap can be designed, for example, as a cross trap or as a tilt trap. The trap can also be designed as a so-called shooting trap that excludes spring-loaded from the lock housing. It is thereby achieved that when the door is closed, the lock automatically keeps the door in the closed position via the latch, and access to the secured space is therefore no longer possible, at least from the outside. To increase security, the latch can be locked, ie it cannot be pushed back into the lock housing even in the event of a mechanical attack on the latch.

In order to enable convenient operation of the lock, it can be provided that the lock case has a change in order to unlock and / or withdraw the latch both via the lock cylinder and via a door handle. With the change it is possible to open the lock from the outside as well as from the inside by means of a locking cylinder. An authorized person can therefore enter the secure room from the outside at any time using a key.

In order to enable actuation of the lock from the secured side at any time, it can be provided that a lock cylinder is accommodated in the lock cylinder receptacle, which can be actuated from the inside via an inside handle, preferably a rotary knob, and from the outside via a key. In particular, the lock cylinder does not actuate a lock bolt. It primarily controls the uncoupling or uncoupling of the outer nut or the outer handle.

In order to allow an authorized person access to the secured space at any time using a key, it can be provided that the locking cylinder has a slip clutch in order to separate the inside handle in the event of a blockage. The slip clutch prevents access to the secured space from being blocked from the inside, for example by blocking the handle of the locking cylinder. The slip clutch enables the lock to be opened from the outside even if the handle is blocked on the inside.

In order to avoid jamming of the lock, one embodiment provides that the lock has no dead bolt. By eliminating the lock bolt, many components of the Lock mechanism, which could otherwise possibly cause the latch mechanism and / or the lock nut to become blocked or jammed. A fixing or blocking of the driver lever by means of a screw, as is customary, for example, in conventional panic locks in order to select a panic side, is not possible in the lock according to the invention, in order to enable the outer nut to be uncoupled at any time.

Fig. 1:

eine schematische Darstellung des erfindungsgemäßen Schlosses eingebaut in einer Tür

Fig. 2:

das Schloss in einer Draufsicht mit eingekuppeltem Außendrücker

Fig. 3:

das Schloss in einer Draufsicht mit abgekuppeltem Außendrücker

Fig. 4:

eine Darstellung der kuppelbaren Schlossnuss

Fig. 5:

eine Explosionsdarstellung der Schlossnuss

Further advantages and refinements of the invention are shown in the figures and described below. Show:

Fig. 1:

is a schematic representation of the lock according to the invention installed in a door

Fig. 2:

the lock in a top view with the outside handle engaged

Fig. 3:

the lock in a top view with the external handle disconnected

Fig. 4:

a representation of the detachable lock nut

Fig. 5:

an exploded view of the lock nut

The Figures 1-5 show a possible embodiment of the lock 1. The same parts of the lock are each provided with the same reference numerals. The Fig. 1 shows a schematic view of the lock 1 according to the invention installed in a wing of a door in a building. The lock 1 is designed as a mortise lock and sits in a tab of the door leaf. The lock is connected to two door handles, on the inside of the secured room with an interior door handle 7i and on the Outside with an outside door handle 7a. A locking cylinder 6 is accommodated in a locking cylinder receptacle of the lock 1 and can be operated from the inside by means of a rotary knob 61.

In a starting position, the lock 1 can be operated and opened from both sides using the lever handle. If required, the outside door handle 7a can be uncoupled from the inside, ie from the secured space. Uncoupling is done by turning the hand knob 61, as in Fig. 1 shown in the direction of the arrow. This makes it possible to lock the lock 1 from the secured room in such a way that the door cannot be opened from the outside. Uncoupling the outside door handle 7a is also possible especially when the outside door handle 7a has already been actuated.

In the Fig. 2 the lock 1 is shown with the lock cover removed. The lock has a lock case 12 and a lock face plate 11. Arranged in the lock case 12 are the elements of the lock mechanism as well as a latch 2 reaching through the face plate and a control latch 16 reaching through the face plate. The lock case 12 has in its lower area a receptacle 18 for a lock cylinder, not shown. A lock nut 4 is arranged above the locking cylinder. The lock nut 4 is designed as a split lock nut and has, as in Fig. 5 shown, an inner nut 4i and an outer nut 4a.

A door handle can be inserted into the lock nut 4 by means of a handle pin. A spiral spring 14 is arranged in the lock case 12 above the lock nut 4 and serves as a return spring for the lever handle. The lock nut 4 has a latch driver 44 which interacts with the latch 2 in order to withdraw them into the lock housing 12 for unlocking. The latch 2 is designed as a shooting latch and is acted upon or pushed out of the lock housing 12 by a latch spring 21. A control latch 16 is arranged above the lock latch 2. The control latch 16 interacts with a latch locking mechanism in order to lock the latch 2 when the door is locked. The latch locking mechanism has a slide plate which can be moved parallel to the faceplate and which is used to lock the latch downwards, ie into the in Fig. 2 position shown is movable. A front edge of the slide plate is on the rear side of the latch body and prevents the latch 2 from being pressed back into the lock housing 12. A secure locking in the closed position of the door to be secured is thereby achieved.

In order to release the lock of the lock 1 and ultimately to open the door, the lock 1 can be unlocked, for example, via a locking cylinder inserted into the locking cylinder receptacle 18. In this case, a change lever 17 is actuated, by means of which the slide plate 22 is moved upward parallel to the face plate and thereby releases the latch 2. At the same time, the change lever 17 pulls the latch 2 back into the lock housing 12 via a pivot lever 17a.

An alternative way of opening the lock 1 is via the inside door handle 7i. The door handle 7i is connected to the inner nut 4i. By operating the door handle 7i, which in the Figures 2 and 3 is not shown, the inner nut 4i is rotated clockwise. The slide plate 22 is lifted by a cam of the inner nut and at the same time the latch 2 is retracted into the lock housing 12 via the latch driver 44.

With the outer nut part 4a engaged, the lock can also be opened from the outside via the door handle 7a connected to the outer nut 4a.

The lock nut 4 is in the Fig. 4 shown as an assembly. The lock nut 4 has a receptacle for a handle pin in the middle. The inside 4i of the lock nut is permanently connected to the lock mechanism in order to actuate the latch 2. The outer nut 4a of the two-part lock nut 4 can optionally be connected or disconnected. A nut driver 41 arranged between the outer nut part 4a and the inner nut part 4i is provided for coupling or uncoupling the outer nut part 4a. The nut driver 41 is pivotally mounted on the outer nut part 4a. As in Fig. 5 for this purpose, the outer nut part 4a has a pin which engages in a bore in the nut driver 41. The pin forms a pivot bearing for the nut driver lever 41. In the area of the pivot bearing, as in Fig. 4 shown, a driver spring 42 is arranged. The driver spring 42 acts on the nut driver 41 to the outside, ie out of the lock nut 4.

In the Fig. 4 the engaged position of the nut driver 41 is shown. In the coupled position, the nut driver 41 is supported on the support bearing 43 on the inner nut 4i. As a result, the outer nut 4a is connected in a rotationally fixed manner to the inner nut 4i via the driving lever 41. The driver lever 41 has a bevelled outer contour in the region of the support bearing, which is designed such that the driver lever 41 is forced out of engagement with the support bearing 43 by the rotation of the outer nut 4a.

In the Fig. 2 the lock is shown with the outer nut engaged. The lock 1 has a cross mounted to the faceplate 11 slidably Control spool 3 on. The control slide 3 is slidably mounted in the lock housing 12 via an elongated hole 32 and a pin 15. The spool 3 points at its in the Fig. 2 right end on a guide surface 33 which is inclined and cooperates with a clutch slide 5. In the in the Fig. 2 shown engaged position, the clutch slide 5 is supported against the force of the clutch spring 52 on the top of the control slide 3. The control slide 3 is fixed in this engaged position by a resilient catch 13. The resilient catch 13 engages in a recess 31 arranged on the control slide 3.

The clutch slide 5 cooperates at its upper end with the nut driver 41. The clutch slide 5 has a drain surface 51 at its upper end. The drain surface 51 is rounded and complementary to the round lock nut 4. The nut driver 41 is supported on the drain surface, which in turn urges the nut driver 41 against the force of the driver spring 42 against the lock nut 4 to engage it. As a result, the driver lever 41 in the Fig. 2 or 4 shown coupled position fixed. The round design of the run-off surface 51 ensures that the engagement of the follower lever 41 with the support bearing 43 is ensured over the entire rotation angle range of the lock nut.

In the Fig. 3 the lock is shown in the uncoupled position of the outer nut 4a. The control slide 3 is shifted to the left, ie towards the face plate 11. The control spool 3 is displaced via a locking cylinder (not shown). The locking cylinder is inserted in the locking cylinder receptacle 18 and engages with its locking lug in a recess in the control slide. When closing, ie when Turning the lock cylinder counterclockwise moves the control spool 3 to the left. When the control slide is moved, the coupling element 5 acted upon by the coupling spring 52 slides along the inclined guide surface 33. The upper end of the coupling element 5 moves away from the lock nut 4. The guide surface 51 releases the driver lever 41. The driver spring 42 pivots the driver lever 41 about its pivot bearing so that it disengages from the support bearing 43. As a result, the rotationally fixed connection between the outer nut part 4a and the inner nut part 4i is canceled, so that the outer nut part 4a can rotate freely. By uncoupling the outer nut 4a, the connection of the outside door handle 7a with the lock mechanism is released, so that the lock 1 can no longer be opened from the outside.

Uncoupling the outer door nut 4a is possible in any position of the lock nut 4 or the inner nut part or the outer nut part. Even if the outside door handle is already actuated, it is ensured that the driving lever 41 is pressed out of engagement via the driving spring 42 and thus the outer nut part 4a is uncoupled. Even if, in an emergency, the inside door handle 7a is held against an opening force applied from the outside, i.e. an increased clamping force occurs, the oblique contour of the driving lever 41 ensures that it is disengaged from the support bearing 43 and the outside nut 4a is securely removed the inner nut 4i uncouples. This means that the door can be locked securely in any situation from within a secured room.

LIST OF REFERENCE NUMBERS

1

lock

11

stulp

12

lock case

13

notch

14

Return spring

15

spigot

16

Steuerfalle

17

change

18

Lock cylinder intake

2

Cases

21

case spring

22

slide plate

3

spool

31

recess

32

Long hole

33

guide surface

4

lock follower

4a

outside nut

4i

internal head

41

Nussmitnehmer

42

driver spring

43

support bearings

44

Fallenmitnehmer

5

coupling member

51

drainage area

52

clutch spring

6

lock cylinder

61

knob

7

door handles

7a

external handle

7i

inside handle

Claims (15)

1. Lock for a door, a window or similar, preferably an amok lock, having a lock plate (11) and a lock case (12) connected to this, in which a receiver (18) for a lock cylinder, a couplable lock follower (4), a latch (2) or a latch bolt, and a control element (3) switchable between an uncoupled position and a coupled position by a lock cylinder are arranged,
   wherein the couplable lock follower (4) has an inner follower (4i) which is able to be or is connected to an inner handle and an outer follower (4a) which is able to be connected to an outer handle, and the control element (3) cooperates with a coupling element (5) in order to couple with and/or uncouple the outer follower (4a),
   wherein a follower tappet (41) is formed as a tappet lever (41) directly engaging between the outer follower (4a) and inner follower (4i), and the tappet lever is either

   - pivotably mounted on the outer follower (4a) at one end and is supported on a support bearing (43) arranged on the inner follower (4i) at the other end, or

   - is pivotably mounted on the inner follower (4i) at one end and is supported on a support bearing (43) arranged on the outer follower (4a) at the other end, and wherein the tappet lever (41) has a tappet spring (42) which pushes the tappet lever (41) into a position disengaged from the support bearing (43),

   characterised in that
   a contour of the support bearing (43) and/or the end of the tappet lever (41) which cooperates with the support bearing is chamfered in order to push the tappet lever (41) out of engagement with the support bearing (43) upon actuation of the outer handle.
2. Lock according to claim 1,
   characterised in that
   the control element (3) is formed as a control element (3) which is movable and/or pivotable transversely to the lock plate (11).
3. Lock according to claim 1 or 2,
   characterised in that
   the control element (3) has a recess (31) in which a resilient catch (13) engages in the coupled position, in order to fix the coupled position of the control element (3).
4. Lock according to one of claims 1 to 3,
   characterised in that
   the control element (3) is formed as a control slide which is moveably mounted in the lock case (12) via a motion link guide or via a slot (32) cooperating with a pin (15).
5. Lock according to one of the preceding claims,
   characterised in that
   the coupling element (5) is formed as a coupling slide movable in parallel to the lock plate (11), one end of which coupling slide directly cooperates with the tappet lever (41) and the other end of which directly cooperates with the control element (3).
6. Lock according to one of the preceding claims,
   characterised in that
   the end of the coupling element (5) cooperating with the tappet lever (41) has a drain surface (51) adapted to a round contour of the lock follower (4), on which drain surface the tappet lever (41) is supported in a coupled position, in order to prevent an uncoupling of the outer socket (4a).
7. Lock according to claim 6,
   characterised in that
   the drain surface (51) extends over a circular segment which is as big as or bigger than the maximum angle of rotation of the lock follower, preferably covers a circular segment in the region of an angle of rotation of at least 15° or preferably up to 70°.
8. Lock according to one of the preceding claims,
   characterised in that
   the coupling element (5) is connected to a coupling spring (52) mounted in the lock case (12), said coupling spring pressurising the coupling element (5) into the uncoupled position.
9. Lock according to one of the preceding claims,
   characterised in that
   the control element (3) directly cooperates with the coupling element (5) via a chamfered guide surface (33), in order to move this coupling element against the force of the coupling spring (52) for the purpose of coupling.
10. Lock according to one of the preceding claims,
    characterised in that
    the inner follower (4i) is permanently coupled with the latch (2) or with a latch mechanism which operates the latch.
11. Lock according to one of the preceding claims,
    characterised in that
    the latch (2) is formed as a blockable latch, in particular a tilt latch or cross latch, or as a latch bolt.
12. Lock according to one of the preceding claims,
    characterised in that
    a lock cylinder (6) is received in the lock cylinder receiver (18), said lock cylinder being able to be operated from the inside by an inner latchkey (61) and from the outside by a key.
13. Lock according to one of the preceding claims,
    characterised in that
    the lock cylinder (6) has a slip coupling, in order to separate the inner latchkey (61) in the case of a blockage.
14. Lock according to one of the preceding claims,
    characterised in that
    the lock case (12) has a changer, in order to unblock and/or retract the latch using the lock cylinder (6) as well as using a door handle.
15. Lock according to one of the preceding claims,
    characterised in that
    the lock (1) has no lock bolt.

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