EP2706174B1 - Lock for a door - Google Patents

Description

The present invention relates to a lock for a door with a housing in which a cross latch is movably received in a thrust direction, so that the cross latch can be brought into a closed position in which it protrudes out of the housing and so that the cross latch can be brought into an open position, in which it is retracted into the housing, and wherein a blocking device is provided, with which the cross latch is locked in the closed position.

STATE OF THE ART

FIG. 1 shows a schematic representation of a lock 1 for installation in a door leaf with a housing 10 in which a cross-latch 11 is movably received in a thrust direction 12. Cross-latches 11 are generally used for pressure relief of locking elements by the cross-latch 11 has a width which is greater than the width of the locking element. This ensures that the closing force of the door is received on the cross latch 11 by the strike plate on the cross latch 11 comes into abutment, while the locking element relative to the strike plate is free to move and thus pressure relieved. Thus, the locking element can be retracted force minimal by pressing the lock from the strike plate, and only on a last path section when retracting the locking element in the housing 10 of the lock 1, the cross latch 11 is unlocked, so that they can be automatically pushed back into the housing 10, for example by manually moving the door away from the strike plate.

For blocking the cross latch 11 in the closed position I shown, a clamping element 26 is used, by which the cross latch 11 is held in the closed position I shown. For this purpose, the clamping element 26 has a wedge surface 27, against which a pressure body 20 in the form of a roller 20 comes into abutment, wherein the pressure body 20 is received on the trap neck 17 of the cross latch 11.

The lock 1 further includes a slider member 18 which cooperates with the clamping member 26 to vertically move same as the slider member 18. For this purpose, the slider element 18 has a stop surface 28, and if the slider element 18 is moved upward in the view shown, the stop surface 28 can abut against a stop 29 on the clamping element 26, so that the clamping element 26 is likewise moved upward. As a result of the movement of the clamping element 26 upwards, the pressure body 20 is released at the latch neck 17 of the wedge surface 27 of the clamping element 26, and the cross latch 11 can be inserted into the housing 10 of the lock 1.

The hammer thus formed is thus based on the principle of a clamping wedge, which is formed by the clamping element 26 with the wedge surface 27, wherein disadvantageously the clamping element 26, for example by guide elements 30 consuming in the housing 10 must be performed so that this by only a small release force from the blocking arrangement against the pressure body 20 can be solved. The wedge angle of the wedge surface 27 must be carried out very accurately with further disadvantage, and a dimensional deviation of the wedge surface 27 in the thrust direction 12 already causes a large required change in the position of the clamping element 26 in the vertical direction due to the steep wedge angle.

The farther the clamping element moves downward, the sooner the slider element thus touches the clamping element during the unlocking of the lock, thus it may happen that the cross-vane wings 31 of the cross-latch 11 rotate into one another so far that the locking element is no longer depressurized and against the Striker comes to the plant, since the total width of the crosshatch wings has become smaller than the bar width.

To execute a lock, for example as a panic lock, there are normatively limited forces that must not be exceeded in order to retract the locking element into the lock. If due to the unlocking of the cross latch, the locking element against the strike plate to the plant, so there is the disadvantage that the normatively limited forces due to the resulting friction and a possible clamping can not be met.

The post-published EP 2666 938 A2 discloses a lock with a locking mechanism that may include a toggle.

The DE 297 01 070 U1 discloses a lock with a drive lever and a slider acting on a latch.

DISCLOSURE OF THE INVENTION

It is thus the object of the present invention to provide a lock with a cross latch, which can be held in an improved manner by a blocking device in a closed position, in particular, the task arises to provide an improved blocking device, with the cross latch in a simple manner can be blocked in the closed position.

This object is achieved on the basis of a lock for a door according to the preamble of claim 1 in conjunction with the characterizing features. Advantageous developments of the invention are specified in the dependent claims.

The invention includes the technical teaching that the blocking device is formed by a toggle lever assembly, which comprises a first lifting element and a second lever element, wherein the lever elements are connected to each other via a hinge connection, wherein a slider element is provided and movably received in the housing, wherein the second lever element is rotatable about a housing-fixed axis and is designed for operative connection with the slide element.

By the execution of the blocking device as a toggle lever arrangement, the advantage is achieved that no wedge surface is necessary to interact directly or via a pressure body with the cross latch and to block them. In particular, the toggle lever assembly has no component that must be performed consuming in the housing of the castle, as is necessary for guiding the clamping element with the wedge surface. By the toggle lever arrangement with the first and second lever element, a force transmission is achieved in order to move with a low release force a blocking body in a blocking position, so that the cross latch is held in fully extended position from the housing.

According to the invention, a slide element is provided and movably received in the housing, wherein the second lever element is rotatable about a housing-fixed axis and is designed for operative connection with the slide element. Due to the operative connection, the second lever element can be activated by the slide element in order, for example, to transfer the blocking device from a blocking position into a release position. Through the connection of the lever elements via the articulated connection, upon activation of the second lever element by the slide element, the first lever element can also be moved, which interacts with the cross latch, and forms the blocking body. The toggle lever assembly is designed so that a release force, which is necessary from the slider element to the second lever element, can be significantly lower than a force which is necessary in order to bring the first lever element into operative connection with the cross latch in such a way that it blocks in the closed position. According to an advantageous variant of the toggle lever arrangement, the cross-latch can interact via a latch neck with the first lever element.

In order to move the first lever element between the blocking position and the release position relative to the latch neck of the cross latch, is provided according to a further embodiment, rotatably receive the first lifting element in a guide element and to move over this on or in the housing. The toggle lever arrangement can be substantially stretched in a blocking position, so that the first lever element in the closed position blocks the cross latch in particular via a pressure body received on the latch neck. Thus, the toggle assembly takes in the extended position in which extend both lever elements approximately in a common axis, the blocking position, and the second lever element is activated by the slider element, this rotates about a housing-fixed axis, and the longitudinal axes of the lifting elements close it following an angle to each other, whereby the release position of the blocking device is reproduced. While the lever members are transferred to a position enclosing an angle to each other, the guide member moves relative to the housing, and the lever member can release the cross latch over the latch neck.

With further advantage, the second lever element may have a driving arm, which is designed to interact with the slider element, wherein the toggle lever assembly can be brought out upon interaction of the slider element with the driving arm of the extended and the cross latch blocking arrangement by the second lever member rotates about the housing fixed axis , Will the toggle assembly off brought out of the closed position, and close the lever elements at an angle to each other, so the guide member on which the first lever member is rotatably received, moves in the same direction as the slider element, wherein the movement direction is transverse to the thrust direction of the cross latch. Consequently, the linear movement of the slider element is transferred via the driving arm of the second lever element in a rotational movement of the second lever element, and the rotational movement of the second lever element is converted via the hinge connection in a pivoting stroke movement of the first lever element. Due to the stroke portion of the movement in the first lever element, this is released from the blocking position against the pressure body at the trap neck of the cross latch, so that in the course of the cross latch can be inserted with extremely little force in the housing of the castle, while the angle between the two lever elements continuously further reduced.

To at least slightly bias the toggle lever assembly into its blocking position, a return spring may be provided and cooperate, for example, with the second lever member. The return spring may for example be designed as a leg spring and be supported fixed to the housing with a first leg, so that the second leg preferably presses against the driving arm of the second lever element. If the slide again disengages from the second lever element, and the door is open, that is, the strike plate is disengaged from the cross latch, a cross latch spring returns the cross latch to the closed position, and at the same time the return spring returns the toggle assembly Blocking position back.

Furthermore, it is advantageous to carry out the first lever element with a guide contour with which the cross latch, but in particular the case neck and preferably the pressure body, cooperate. The guide contour may extend partially around the edge of the guide element, since this is enclosed by the first lever element and because the first lever element can rotate about the guide element. The guide contour is used for pressure contact against the pressure hull, which is added to the trap neck of the cross latch. In particular, the pressure body can form a roller which is designed to roll on the guide contour of the first lever element. In particular, when the toggle lever assembly has been activated, and this has left the stretched arrangement of the lever elements, by pressing the cross latch, the roller on the guide contour continue to roll along, whereby the position of the guide element on which the first lever member is rotatably received, automatically continue is changed without the slide must continue to act against the driving arm of the second lever element. This ensures that the slider element only has to reach the trigger arm on the second lever element for triggering the toggle lever arrangement in order to ensure a movement of the cross latch into the open position in the further course, whereby at the same time a further angle of the lever elements to one another is achieved.

For guiding the guide element, at least one elongated hole can be provided, for example, in the housing of the lock, so that forces acting on the first lever element via the cross latch can be diverted into the housing with the guide element. The slot extends approximately perpendicular to the thrust direction of the cross latch, the thrust direction of the spine dimension of the castle corresponds.

PREFERRED EMBODIMENT OF THE INVENTION

Figur 1

einen Ausschnitt eines Schlosses für eine Tür mit einer Blockiereinrichtung gemäß dem Stand der Technik,

Figur 2

ein Schloss für eine Tür mit einer Blockiereinrichtung, die erfindungsgemäß durch eine Kniehebelanordnung gebildet ist und die in einer Blockierstellung gezeigt ist und

Figur 3

das Schloss für eine Tür mit der Kniehebelanordnung, die in einer Freigabestellung gezeigt ist.

The invention improving measures will be described in more detail below together with the description of a preferred embodiment of the invention with reference to FIGS. It shows:

FIG. 1

a detail of a lock for a door with a blocking device according to the prior art,

FIG. 2

a lock for a door with a blocking device, which is formed according to the invention by a toggle lever assembly and which is shown in a blocking position and

FIG. 3

the lock for a door with the toggle lever assembly, which is shown in a release position.

Fig.1 shows a section of a lock for a door according to the prior art and is already described in the introductory part of the present description.

Fig. 2 shows a lock 1 in a partial view with a housing 10 in which a cross-latch 11 is movably received in a thrust direction 12 and the thrust direction 12 corresponds to the X-direction shown, which represents the Dornmaßrichtung of the castle. The cross latch 11 is in a closed position I and protrudes from a forend 32 on the front side out of the housing 10. Furthermore, the lock 1 comprises a locking element 33, which is also shown protruding from the forend 32, in order to lock in a strike plate the door in which the lock 1 can be received. The lock 1 furthermore has a control catch 34, by means of which a self-locking of the locking element 33, for example, then effected in the manner of a closing sequence control can be when the control catch 34 comes into contact with the strike plate in the door frame.

Closes the lock 1, the door in the door frame, so serves to lock the locking element 33 which protrudes in a closed position of the housing 10 of the lock 1 to engage in a face plate 32 opposite strike plate. The cross latch 11 serves for mechanical pressure relief of the locking element 33, since the cross latch 11 has a greater width than the width of the locking element 33. To activate the locking element 33 is a slider element 18 which is movable in the vertical direction, that of the Y-direction shown equivalent. The vertical movement of the slider element 18 can be triggered for example by a door handle, which is received in a follower 36, wherein the follower 36 acts via a lever 37 against a stop 38 on the slider element 18 to move it vertically. The slider element 18 is accommodated in the housing 10 of the lock 1 and cooperates with the locking element 33 via a link arrangement 35. If the slider element 18 moves vertically upward in the positive Y direction, then the locking element 33 can be retracted into the housing 10. The retraction of the locking element 33 can be done with a standard correspondingly low force, since the locking element 33 is not applied against the strike plate and thus forms no friction. Upon further movement of the slider element 18, the blocking device for blocking the cross latch 11 can be released, so that then the cross latch 11 can also move into the housing 10 in order to release the door through the lock 1 from the frame. In the illustration, the cross latch 11 is shown protruding out of the housing 10, and the blocking device blocks the cross latch 11 in the arrangement shown. The mode of action the blocking device according to the invention and its execution as a toggle lever arrangement 13 is described in more detail below.

The blocking device is formed by a knee lever assembly 13, which forms an effective link between the slider element 18 and the cross latch 11. For this purpose, the toggle lever arrangement 13 has a first lever element 14 and a second lever element 15, wherein the lever elements 14 and 15 are connected to one another via an articulated connection 16. The first lever member 14 is rotatably received about a guide member 19 about this, wherein the guide member 19 is displaceable in the Y direction in the housing 10. The second lifting element 15 is rotatably received about a housing-fixed axis 22, wherein the lever elements 14 and 15 for securing the closed position II lie in their longitudinal extent approximately in a common vertically aligned axis.

The first lever element 14 has a guide contour 24 against which a pressure roller 20 designed as a roller 20 abuts. The pressure body 20 is received on a latch neck 17 of the cross latch 11, so that a movement of the cross latch 11 is blocked in the negative X direction. The blocking of the cross latch 11 is due, in particular, to the fact that the receiving point of the first lever element 14, which is formed by the guide element 19, lies approximately behind the pressure element 20 in the X direction. In order to release the cross latch 11, therefore, the first lever member 14 must be moved with the guide member 19 from the position behind the pressure roller 20. Only so that the blocking device is released and the cross latch 11 can be transferred from the closed position I shown in an open position II, as this in the following Fig. 3 is shown.

The support disk 41 is disposed between the trap neck 17 and the pressure body 20 and ensures that the first lever member 14 is not under load from the slot 25 on the crosshatch wings 31 when the door is closed (see FIG. 3 ) pops out.

Fig. 3 shows a lock 1 with a cross latch 11 in an open position II with an activated toggle lever assembly 13, so that a blocking action of the cross latch 11 is released. The operation of the transfer of the closed position I in the open position II of the cross latch 11 is based on Fig. 3 in synopsis with Fig. 2 described below.

In Fig. 3 the toggle lever assembly 13 is shown in a state in which it has been transferred by activation from a blocking position to a release position. To activate the toggle assembly 13, the slider 18 has been displaced vertically upward in the positive Y direction. The displacement of the slider 18 is effected for example by actuation of an unspecified door handle, which is received in a pusher 36. Via a lever 37 which is connected to the follower 36, the slider element 18 can be displaced vertically by the lever 37 abuts against a stop 38 on the slider element 18.

If the slide element 18 displaces vertically upward in the positive Y direction, a stop surface 28 on the slide element 18 comes against a driver arm 21, which is arranged on the second lever element 15. Characterized the second lever member 15 of the toggle lever assembly 13 is rotated about the housing-fixed axis 22, and by the hinge 16, the first lever member 14 rotates in the guide member 19. At the same time, the guide member 19 moves in a slot 25, which is introduced, for example, in the housing plate, vertically upward in the positive Y direction, whereby the first lever element 14 is moved out of the arrangement behind the pressure body.

The effective contact between the abutment surface 28 on the slider element 18 against the driving arm 21 of the second lever element 15 is such that the locking element 33 is securely retracted into the housing 10 of the lock 1, that is, the cross latch 11 is always wider than the locking element 33. In the position shown, the cross latch 11 is already in the open position II by the activation effected and the further insertion of the cross latch 11 is carried out by a force of the striking plate against the Kreuzfallenflügel 31, so that the cross latch 11 with the latch neck 17 in the forend 32 of the Lock 1 is pressed.

The unlocking of the blocking device causes angling of the lever members 14 and 15 to each other, so that these from a mutually extended position ( Fig. 2 ) in an angled position ( Fig. 3 ) are transferred. The rotation of the second lever member 15 about the axis 22 is under tension of a return spring 23, and the door handle is released again and the slider member 18 is moved by a slider spring 39 back in the negative Y direction vertically down, so relaxes the return spring 23 again but only up to a certain position if the door is not closed again.

Furthermore, the lock 1 comprises a latch spring 40, with which the cross latch 11 is biased in the thrust direction 12 in the positive X direction. The latch spring 40 is designed as a comparatively weak spring to make the indentation forces of the cross latch 11 in the housing 10 as low as possible.

The invention is not limited in its execution to the above-mentioned and only preferred embodiment. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use. All of the claims and / or advantages resulting from the claims including constructive details or spatial arrangements may be essential to the invention both for themselves and in the various claimed combinations.

LIST OF REFERENCE NUMBERS

1

lock

10

casing

11

cross case

12

thrust direction

13

Toggle assembly

14

first lever element

15

second lever element

16

articulation

17

case neck

18

slide element

19

guide element

20

Pressure body, roll

21

driver arm

22

axis

23

return spring

24

guide contour

25

Long hole

26

clamping element

27

wedge surface

28

stop surface

29

attack

30

guide element

31

Cross case wings

32

stulp

33

locking element

34

Steuerfalle

35

link arrangement

36

follower

37

lever

38

attack

39

slidespring

40

case spring

41

support disc

X direction

Shear direction, backset direction

Y direction

vertical direction

I

closed position

II

open position

Claims (9)

1. A lock (1) for a door with a housing (10), in which a claw-latch bolt (11) is accommodated to be movable in a direction of thrust (12) such that the claw-latch bolt (11) may be brought into a locking location (I), in which the latter protrudes from the housing (10), and such that the claw-latch bolt (11) may be brought into an opening location (II), in which the latter is retracted into the housing (10), and wherein a blocking device is provided, by means of which the claw-latch bolt (11) is blockable in the locking position (I), wherein the blocking device is formed by a toggle lever arrangement (13), which comprises a first lever element (14) and a second lever element (15), wherein the lever elements (14, 15) are connected to each other via an articulated connection (16), characterized in that a slider element (18) is provided, and is accommodated to be movable in the housing (10), wherein the second lever element (15) is rotatable around a housing-fixed axis (22) and configured for an operative connection with the slider element (18).
2. The lock (1) according to claim 1, characterized in that the claw-latch bolt (11) cooperates with the first lever element (14) via a latch bolt neck (17).
3. The lock (1) according to any of the claims 1 to 2, characterized in that the first lever element (14) is accommodated to be rotatable in a guiding element (19), and is movably guided via the latter at or in the housing (10).
4. The lock (1) according to any of the aforementioned claims, characterized in that the toggle lever arrangement (13) in a blocking location is essentially stretched, such that the first lever element (14) in the locking location (I) blocks the claw-latch bolt (11) in particular via a pressure body (20), which is accommodated at the latch bold neck (17).
5. The lock (1) according to any of the aforementioned claims, characterized in that the second lever element (15) includes a catch arm (21), which is configured for interaction with the slider element (18), wherein the toggle lever arrangement (13) upon interaction of the slider element (18) with the catch arm (21) is guidable out of the stretched arrangement blocking the claw-latch bolt (11), in that the second lever element (15) rotates around the housing-fixed axis (22).
6. The lock (1) according to any of the aforementioned claims, characterized in that a return spring (23) is provided and cooperates with the second lever element (15) in such a manner that the former pretensions the toggle lever arrangement (13) in the blocking location thereof.
7. The lock (1) according to any of the aforementioned claims, characterized in that the first lever element (14) includes a guiding contour (24), with which the claw-latch bolt (11), in particular the latch bolt neck (17) cooperates, preferably via the pressure body (20).
8. The lock (1) according to claim 7, characterized in that the pressure body (20) is configured as a roller (20), which is configured for rolling at the guiding contour (24) of the first lever element (14).
9. The lock (1) according to claim 3 to 8, characterized in that the guiding element (19) is guided in at least one oblong hole (25) in the housing (10) such that via the claw-latch bolt (11) the forces acting on the first lever element (14) may be conducted away with the guiding element (19) into the housing (10).

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