DE102017210363B4 - Locking device - Google Patents

Abstract

Locking device (10) for the leaf of a door or window, in particular a revolving door or a sliding door, with a guide rail (12), a sliding element (14) that can be moved in the guide rail (12) and a locking element (16) that is arranged in the guide rail (12) so as to be immovable or minimally displaceable but which absorbs shocks and which cooperates with the sliding element (14) via a coupling element (18) to lock the leaf in a predetermined opening position, characterized in that the coupling element (18) is operatively connected to the sliding element (14) and a guide element (24), in particular a slotted guide, is provided on the locking element (16) or vice versa, the guide element (24) delimiting a guide track (26) through which the coupling element (18) with a coupling section (22) when the leaf is opened initially beyond the locking position and when the leaf is subsequently moved in the closing direction into one of the predetermined opening position corresponding to the locking position (34) and when the sash is moved again in the opening direction into a release position (40).

Description

The present invention relates to a locking device for the leaf of a door or window, in particular a revolving door or a sliding door, with a guide rail, a sliding element that can be moved in the guide rail and a locking element that is arranged in the guide rail so that it cannot be moved or is minimally moved but absorbs shocks, which cooperates with the sliding element via a coupling element to lock the leaf in a predetermined opening position.

To secure a door equipped with a door closer with a guide rail, a so-called sliding block is often used, which is moved in the guide rail when the door is opened and closed. This is usually done using a spring-loaded locking device that engages the side of the sliding block and locks into a recess in the sliding block when the door is at a certain angle. If you want to close the door, the user has to pull on the door handle or the door leaf with considerable force so that the spring-loaded locking device can be released from its locking position and the locking device releases the door leaf.

These locking devices have the disadvantage that a loud, annoying noise is usually produced when they are released. Furthermore, the constant engagement and disengagement of the locking device can cause wear and damage to the sliding block and the locking device. In addition, the known locking devices have the disadvantage that they have to be adapted to the closing force of the door closer. If the holding force transferred from the locking device to the sliding block is too weak, the door leaf will not be held reliably. On the other hand, too strong a holding force leads to increased noise pollution and more force is required to close the door.

document GB 2 143 579 A describes a releasable hold-open device for a spring-operated regulated door closer having a door movement follower adapted to be releasably held in a door opening position. Two locking levers are provided to retain the follower by the arrangement of a permanent magnet acting on a center piece to retain a wedge mounted on the end of the center piece which acts on the locking levers.

The invention is based on the object of creating a locking device for the sash of a door or window, which can be released quietly and with little wear.

The object is achieved by a locking device with the features of claim 1 and in particular in that the coupling element is operatively connected to the sliding element and a guide element, in particular a slotted guide, is provided on the locking element or vice versa, wherein the guide element delimits a guide track through which the coupling element with a coupling section is initially moved beyond the locking position when the sash is opened and, when the sash is subsequently moved in the closing direction, into a locking position corresponding to the predetermined opening position and, when the sash is moved again in the opening direction, into a release position.

The door leaf is released largely silently by the locking mechanism according to the invention with a relatively light, short press in the opening direction.

There is no need to adjust the holding force, as is necessary with the locking devices with locking means described above.

Advantageous embodiments can be taken from the subclaims, the description and the drawings.

According to an advantageous embodiment, the guide element has an entrance opening on the front side. The entrance opening is arranged on the side of the guide element from which the coupling element approaches the guide element when the wing is opened. The side depends on whether the coupling element is connected to the sliding element or the locking element.

Furthermore, according to one embodiment, the guide element is closed on the side opposite the entrance, so that the coupling element with the coupling section can only be moved a short distance beyond the predetermined opening position. A short distance can be defined as a distance between 1 cm and 5 cm, for example. Such an embodiment is advantageous if the door leaf is to be able to be locked in exactly one locking position.

Alternatively, the guide element can have an exit opening. The exit opening is arranged on the side in the direction in which the coupling element moves when the leaf is opened. The exit opening ensures that the opening movement of the leaf is not limited by the guide element. This embodiment is useful, for example, if the door leaf is to be lockable in several locking positions. For this purpose, preferably several Several locking elements are arranged one behind the other along a guide rail, each of which can define a locking position.

According to one embodiment, the exit opening in the guide element is arranged in the course of the guide track in front of the locking position.

Alternatively or additionally, the exit opening in the guide element can be arranged in the course of the guide track after the locking position. The exit opening can thus be arranged in the course of the guide track exclusively after the locking position. However, it is also possible for an exit opening to be arranged in the course of the guide track before and after the locking position.

So that the coupling section can move as freely as possible along the guide path of the guide element, the coupling element preferably comprises a swivel arm equipped with the coupling section, which can be swiveled about a swivel axis that runs perpendicular to the plane of the guide rail. Guide rails are usually channel-shaped, i.e. they have two essentially vertical guide surfaces and a horizontal base surface connecting the guide surfaces. In this case, the base surface defines the plane of the guide rail.

As an alternative to the last-mentioned embodiment with the swivel arm, the coupling element can have a rotatable disk equipped with the coupling section, wherein the disk can be rotated about an axis of rotation that runs perpendicular to the plane of the guide rail. This embodiment is particularly useful when the structurally required distance between the coupling section and the axis of rotation is small.

As a third alternative, the coupling element can have a carriage equipped with the coupling section, which can be moved transversely to the displacement direction of the sliding element and parallel to the plane of the guide rail.

For easy attachment of a closing lever of a door closer to the sliding element, the sliding element can comprise a bolt aligned perpendicular to the plane of the guide rail, which can be connected to the closing lever of the door closer.

According to an embodiment in which the coupling element is connected to the sliding element, the coupling element is rotatable or pivotable about the longitudinal axis of the bolt. For example, the bolt can be rotatably mounted in the sliding element and the coupling element can be connected to the bolt in a rotationally fixed manner. Alternatively, the bolt can be connected to the sliding element in a rotationally fixed manner and the coupling element can be rotatably connected to the bolt. As a third alternative, it would be conceivable to connect the sliding element and the coupling element each in a rotationally fixed manner to the bolt.

In order to avoid damaging the locking device in the event of an overload, for example due to improper pulling on the wing in the direction of the closing direction of the wing, an overload protection device can be provided on the locking device, which is designed to release a positive connection between the coupling section and the guide element in the locking position if an overload acts along the direction of extension of the guide rail between the coupling section and the guide element.

The overload protection can be achieved in a simple manner in that the coupling section and/or a section of the guide element forming the locking position have an inclined surface which rests against the section of the guide element or the coupling section in the locking position, and in that the coupling element and/or the section of the guide element are designed to carry out an evasive movement perpendicular to the plane of the guide rail in the event of an overload acting between the coupling section and the guide element against a restoring force, in particular a spring.

In order to be able to carry out a movement perpendicular to the plane of the guide rail in the event of an overload, the coupling section can be pivoted perpendicular to the plane of the guide rail. For example, the coupling section is connected to the sliding element or the locking element via a coupling element designed as an arm, which can be pivoted or deformed in such a way that the coupling section can be released from the guide element, in particular from the guide slot. In order to reliably ensure that the coupling section and the guide element slide against one another, the said inclined surface is provided on the coupling section and/or the guide element.

In order to enable the locking device to be used again immediately after the overload protection device has been triggered, i.e. without having to reset the overload protection device manually, a spring can be provided and arranged in such a way that the movement of the coupling element and/or the guide element when the overload is triggered securing against a spring force of the spring.

• - eine erste Ablenkfläche, die das Kopplungselement bei Bewegung des Schiebeelements in Öffnungsrichtung in einer Richtung quer zur Verschieberichtung des Schiebeelements ablenkt,
• - eine zweite darauffolgende Ablenkfläche, die das Kopplungselement bei Weiterbewegung des Schiebeelements in Öffnungsrichtung in entgegengesetzter Richtung quer zur Verschieberichtung des Schiebeelements bis zu einem ersten vorgegebenen Punkt wieder zurücklenkt,
• - eine in Öffnungsrichtung des Schiebeelements weisende konkave Anlagefläche, in deren Mittelbereich die Rastposition definiert ist und die einerseits bis gegenüber dem ersten vorgegebenen Punkt und andererseits bis gegenüber einer dritten Ablenkfläche reicht, die das Kopplungselement bei Bewegung des Schiebeelements in Öffnungsrichtung weiter in derselben Richtung ablenkt wie die zweite Ablenkfläche bis zu einem zweiten vorgegebenen Punkt, der in Querrichtung seitlich der konkaven Anlagefläche liegt, sowie
• - eine vierte Ablenkfläche, die das Kopplungselement bei einer Bewegung des Schiebeelements in Schließrichtung wieder in der ersten Ablenkrichtung bis zu einer Ausgangsposition in Querrichtung betrachtet zurück ablenkt.

According to one embodiment, the guide element comprises the following elements:

• - a first deflection surface which deflects the coupling element in a direction transverse to the direction of displacement of the sliding element when the sliding element moves in the opening direction,
• - a second subsequent deflection surface which deflects the coupling element back again in the opposite direction transverse to the direction of displacement of the sliding element up to a first predetermined point when the sliding element continues to move in the opening direction,
• - a concave contact surface pointing in the opening direction of the sliding element, in the central region of which the locking position is defined and which extends on the one hand to the first predetermined point and on the other hand to a third deflection surface which, when the sliding element moves in the opening direction, further deflects the coupling element in the same direction as the second deflection surface up to a second predetermined point which lies transversely to the side of the concave contact surface, and
• - a fourth deflection surface which deflects the coupling element back in the first deflection direction to an initial position viewed in the transverse direction when the sliding element moves in the closing direction.

Such a guide element with deflection surfaces has the advantage that the coupling element and the coupling section are guided reliably. In general, however, other types of guidance are also possible, for example using several magnets.

In the case of a guide element with an exit opening before and after the locking position, the guide element can have a fifth deflection surface which is provided in the area of the exit opening present before the locking position and which, when the sliding element moves in the opening direction, deflects the coupling element further in the same direction as the second deflection surface up to a third predetermined point which has the same position in the transverse direction as the second predetermined point. Several such guide elements can be arranged along the guide rail in order to be able to fix the door leaf in different locking positions and to make opening the door leaf beyond a locking position as smooth as possible.

• 1A den Grundaufbau einer erfindungsgemäßen Feststellvorrichtung in einer Draufsicht;
• 1B den Grundaufbau der Feststellvorrichtung aus 1A in einer Seitenansicht, wobei jedoch die Führungsschiene zwecks einer besseren Erkennbarkeit nicht gezeigt ist;
• 2A bis 2F den Ablauf eines Feststellens und eines Lösens der Feststellvorrichtung aus 1A;
• 3A ein Schiebeelement mit einem Kopplungselement gemäß einer ersten Ausführungsform;
• 3B das Schiebeelement gemäß 3A in einer Schnittansicht;
• 3C ein Schiebeelement mit einem Kopplungselement gemäß einer zweiten Ausführungsform;
• 3D ein Schiebeelement mit einem Kopplungselement gemäß einer dritten Ausführungsform;
• 4A ein Führungselement gemäß einer ersten Ausführungsform;
• 4B ein Führungselement gemäß einer zweiten Ausführungsform;
• 4C ein Führungselement gemäß einer dritten Ausführungsform;
• 4D ein Führungselement gemäß einer vierten Ausführungsform;
• 5A eine Feststellvorrichtung mit einer Überlastsicherung gemäß einer ersten Ausführungsform, wobei die Überlastsicherung noch nicht ausgelöst hat;
• 5B eine Feststellvorrichtung mit einer Überlastsicherung gemäß der ersten Ausführungsform, bei der die Überlastsicherung ausgelöst ist;
• 5C eine Feststellvorrichtung mit einer Überlastsicherung gemäß einer zweiten Ausführungsform, wobei die Überlastsicherung noch nicht ausgelöst hat; und
• 5D eine Feststellvorrichtung mit einer Überlastsicherung gemäß der zweiten Ausführungsform, bei der die Überlastsicherung ausgelöst ist.

The invention is described below using purely exemplary embodiments with reference to the accompanying drawings. They show:

• 1A the basic structure of a locking device according to the invention in a plan view;
• 1B the basic structure of the locking device 1A in a side view, although the guide rail is not shown for better visibility;
• 2A to 2F the process of locking and releasing the locking device 1A ;
• 3A a sliding element with a coupling element according to a first embodiment;
• 3B the sliding element according to 3A in a sectional view;
• 3C a sliding element with a coupling element according to a second embodiment;
• 3D a sliding element with a coupling element according to a third embodiment;
• 4A a guide element according to a first embodiment;
• 4B a guide element according to a second embodiment;
• 4C a guide element according to a third embodiment;
• 4D a guide element according to a fourth embodiment;
• 5A a locking device with an overload protection device according to a first embodiment, wherein the overload protection device has not yet been triggered;
• 5B a locking device with an overload protection device according to the first embodiment, in which the overload protection device is triggered;
• 5C a locking device with an overload protection device according to a second embodiment, wherein the overload protection device has not yet been triggered; and
• 5D a locking device with an overload protection device according to the second embodiment, in which the overload protection device is triggered.

In the 1A and 1B the structure of a locking device 10 according to the invention is shown. The locking device 10 is suitable for To hold the leaf of a door assigned to the locking device 10, in particular a revolving door or a sliding door, or of a window assigned to the locking device 10 in a predetermined open position. For this purpose, a guide rail 12 is attached to the door frame or window frame, for example. In this guide rail 12, a sliding element 14 is mounted so as to be displaceable along the guide rail 12. Also arranged in the guide rail 12 is a locking element 16 which has a guide element designed as a slotted guide 24 and is received in the guide rail 12 so as to be immovable and fixed. A coupling element 18 is attached to the sliding element 14, which in the present exemplary embodiment can also be referred to as a sliding block. The coupling element 18 is designed in the form of a pivot arm and can pivot about an axis A of a bolt 20 parallel to the plane of the guide rail 12. At the end of the coupling element 18 remote from the sliding element 14, a coupling section 22 is attached or formed, which can engage in the guide of the locking element 16. In other words, the coupling section 22 is at a height which corresponds at least in some areas to the height of the guide of the locking element 16 ( 1B) . In contrast, the sliding element 14 is at a height which does not correspond to the height of the locking element 16, so that the sliding element 14 can move over the locking element 16.

Different variants of the sliding element 14 are described in relation to the 3A to 3D and different variants of the guide rails in relation to the 4A to 4D described in more detail.

The 2A to 2F describe the functioning of the 1A and 1B described locking device 10. In a starting position ( 2A) , which occurs, for example, when the door leaf is closed, the sliding element 14 is located in an area remote from the locking element 16 in the 2A to 2F not shown guide rail 12. The coupling section 22 of the coupling element 18 is not yet located on a guide track 26 formed by the slotted guide 24 of the locking element 16. If the sliding element 14 is moved by opening a door, ie by rotating a hinged wing or moving a sliding wing, in the direction of the locking element 16 designed as a slotted guide 24, the coupling section 22 of the coupling element 18 penetrates through an entry opening 28 into the guide track 26 delimited by the slotted guide 24 and is guided by the slotted guide 24 along the guide track 26. In 2 B the coupling section 22 abuts a first deflection surface 30, which pushes the coupling section 22 to the left (upwards in the figures) relative to the direction of movement of the sliding element 14 when the door is opened. The guide track 26 describes a right turn after the left turn, so that the coupling section 22 is pushed back to the right (downwards in the figures) by means of a second deflection surface 32 until the coupling section 22 has reached a first predetermined point 33.

In 2C the state is shown in which the coupling section 22 has reached the first predetermined point 33. The door is now opened so far that it can be brought into a locking position 34. By releasing the door leaf when the coupling section 22 is at the first predetermined point 33, a door closer can retract the sliding element 14 in the closing direction, ie in the direction in which the sliding element 14 moves when closing the door leaf (to the left in the figures). As in 2D As can be seen, the coupling section 22 is thereby moved against a concave contact surface 35, in the middle area of which the locking position 34 is defined and which extends on the one hand to the first predetermined point 33 and on the other hand to a third deflection surface 36. In 2D the sliding element 14 is held in the locking position 34, which can also be referred to as the locking position, via the coupling element 18 on the locking element 16, in that the coupling section 22 rests positively on the concave contact surface 35 and is held by it. The coupling element 18 and the concave contact surface 35 form a metastable system, so to speak, which can be disturbed by pressing against the door leaf in an opening direction of the leaf. This is in 2E shown. By pressing against the door leaf in the opening direction of the leaf, the sliding element 14 is moved in the opening direction along the guide rail (to the right in the figures) so that the coupling section 22 comes into contact with the third deflection surface 36 and is pressed by it to the right and outwards (downwards in the figures). At the end of the third deflection surface 36, a second predetermined point, a release position 40, is defined by the guide element 24. If the coupling section 22 is at this second predetermined point, i.e. the release position 40, the locking device 10 is decoupled again. The locking device 10 is therefore automatically decoupled as soon as the door leaf is moved from the locking position 34 a certain distance in the opening direction of the leaf. If the door leaf is now released, the door closer pulls the sliding element 14 along the guide track 26 past the concave contact surface 35 defining the locking position 34. In the closing direction tion of the coupling section 22 in front of the inlet opening 28 is a fourth deflection surface 42 ( 2F) on the link guide 24, which guides the coupling element 22 in the closing movement direction of the coupling section 22 to the right (upwards in the figures) up to the input opening 28 located centrally in the transverse direction.

In general, the guide track 26 thus describes a closed track that can only be traveled in one direction. A section 44 of the guide element 16 defining the locking position 34 is arranged in the middle of the guide track 26.

In the 3A to 3D various exemplary embodiments of a sliding element 14 with different coupling elements 18 are shown. Corresponding components are provided with corresponding reference numerals. It is understood, however, that the various coupling elements 18 do not necessarily have to be arranged on the sliding element 14, but can instead also be arranged on the locking element 16. In this case, the guide element 24 would then be arranged on the sliding element 14.

In 3A a sliding element 14a designed as a sliding block is shown, in whose geometric center the axis A of a bolt 20a runs. The coupling element 18 is designed in the form of a pivot arm 18a, which is pivotably mounted on the bolt 20a about the axis A of the bolt 20a. A coupling section 22 in the form of a conical pin 22a is attached to the pivot arm 18a in an end section remote from the sliding element 14a. The pivot arm 18a has a slight S-shaped curvature, which is best seen in 1B can be seen. The end of the pivot arm 18a remote from the coupling section 22 rests against an underside 46a of the sliding element 14a. The coupling section 22a protrudes from a corresponding underside 50a of the pivot arm 18a, so that the height range in which the coupling section 22a lies does not overlap with the height range in which the sliding element 14a lies.

As in 3B As can be seen, the bolt 20a protrudes from the side of the sliding element 14 facing away from the coupling element 18a. A protruding section 54a formed thereby can be connected to a closing lever (not shown) of a door closer, in particular in a rotationally fixed manner.

In 3C an alternative embodiment of a sliding element 14 is shown. Instead of the swivel arm, according to this embodiment, a disk 18b is provided as a coupling element, which is connected to a sliding element 14b so as to be rotatable about the axis A of a bolt 20b. On the side 50b of the rotatable disk 18b facing away from the sliding element 14b, a conical coupling section 22b protruding perpendicular to the plane of the guide rail 12 is formed.

In 3D a further alternative for the design of a sliding element 14c is shown. In this embodiment, the coupling element is formed by a carriage 18c, which can be moved perpendicular to the direction of displacement of the sliding element 14c and parallel to the plane of the guide rail 12. The carriage 18c has a coupling section 22c, which moves with the carriage 18c. In order for the carriage 18c to be movable perpendicular to the direction of displacement of the sliding element 14c and parallel to the plane of the guide rail 12 in the sliding element 14c, a guide groove 56c extending transversely to the direction of displacement of the sliding element 14c is formed in the sliding element 14c. The guide groove 56c is arranged along the direction of displacement of the sliding element 14c in the opening direction in front of a bolt 20c.

Furthermore, the 4A to 4D various guide elements 24a to 24d designed as sliding guides.

In 4A a guide element 24a according to a first embodiment is shown. The guide element 24a forms a non-traversable slotted guide. The slotted guide describes a guide track 26a, the beginning and end of which are defined at the inlet opening 28a. In this embodiment, the slotted guide 24a is closed on the side opposite the inlet opening 28a. An end stop 58a, 60a is provided at the first predetermined point 33a and the second predetermined point 40a, which stops the coupling section 22 from making any further movement in the opening direction (to the right in the figures). As a result, the coupling section 22 can only move a short distance 62a beyond the predetermined opening position and thus the locking position 34a.

In 4B , which shows a guide element 24b according to a second embodiment, the guide track 26b is designed to be open at the first predetermined point 33b, so that a movement of the coupling section 22 in the opening direction is not limited by the guide element 24b. There is an exit opening 64b, which is arranged in the course of the guide track 26b in front of the locking position 34b. In other words, the coupling section 22 can be in the course of the guide track 26b at the first predetermined point 33b follow an alternative guide path 67b, which does not lead to the locking position 34b, but to the exit opening 64b. At the second predetermined point 40b, however, a stop 60b is provided, so that the coupling section 22 is prevented at this point 40b from making a movement in the opening direction (to the right in the figures).

In the 4C In the embodiment shown, the guide track 26c is designed to be open at the second predetermined point 40c, so that a movement of the coupling section 22 at the second predetermined point 40c is not limited in the opening direction by the guide element 24c. The guide element 24c defines an exit opening 64c, which is arranged in the course of the guide track 26c after the locking position 34c. The coupling section 22 must therefore have been in the locking position 34c in the course of the guide track 26c before it can be guided through the exit opening 64c.

In 4D a guide element 24d can be seen, the guide path 26d of which is open at the first predetermined point 33d and at the second predetermined point 40d. As a result, a movement of the coupling section 22 in the opening direction is not limited by the guide element 24d either at the first predetermined point 33d or at the second predetermined point 40d. Two different alternative guide paths 67d, 68d lead to the exit opening 64d, the first alternative guide path 67d starting at the first predetermined point 33d and the second alternative guide path 68d starting at the second predetermined point 40d, and both merging at a third predetermined point 70d. For this purpose, a fifth deflection surface 72d is provided, which deflects a coupling section 22 moving along the first alternative guide track 67d in the transverse direction, ie transversely to the opening direction, until the coupling section 22 is located at the third predetermined point 70d in the second alternative guide track 68d. The second predetermined point 40d and the third predetermined point 70d have the same position in the transverse direction, ie their distance from the central axis of the guide element 24d running in the direction of displacement is the same.

Several of the open guide elements 24b, 24c or 24d can be arranged along a guide rail 12 so that the door leaf can be secured in several locking positions 34b, 34c, 34d. To easily accommodate the coupling section 22, the inlet opening 28 and the outlet opening 64 in the embodiments shown are designed such that they each taper towards the center of the guide element 24.

In order to prevent damage to the locking device 10 in the event of an overload 74, the locking device 10 can be provided with a locking element, as shown in particular in the 5A to 5D shown, an overload protection device 76 can be provided. This is designed to release a positive connection between the coupling section 22 and the guide element 24 in the locking position 34 when the force acting between the coupling section 22 and the guide element 24 exceeds a threshold value. The 5A and 5B show a first alternative of how such an overload protection device 76a can be implemented. The coupling section 22a is conical and therefore has an inclined surface 66a. This inclined surface 66a is in contact with an upper edge 78a of the concave contact surface 35a in the locking position 34. If an overload 74 acts on the sliding element 14, the conical coupling section 22a slides along the upper edge 78a out of the guide element 24 ( 5B) . While the conical coupling section 22a slides out of the guide element 24, the coupling element 18a designed as a swivel arm deforms elastically. The swivel arm 18a thus acts as a spring 80a, which holds the coupling section 22a in the guide track 26 during regular use and releases it for an evasive movement in the event of an overload 74.

The 5C and 5D illustrate a second embodiment of an overload protection device 76b. Here, the section 44b forming the locking position 34 and the coupling section 22b each have an inclined surface 82b, 66b. The inclined surfaces 66b, 82b lie flat against one another under regular load without sliding off one another when the coupling section 22b is in the locking position 34. However, if an overload 74 acts between the coupling section 22b and the section 44b forming the locking position 34, the section 44b forming the locking position 34 deviates against a spring force of a spring 80b perpendicular to the plane of the guide rail 12. For this purpose, the section 44b forming the locking position 34 is mounted in the remaining guide element 24b so as to be displaceable in the direction perpendicular to the plane of the guide rail 12. The inclined surface 66b of the coupling section 22b slides along the inclined surface 82b until the section 44b forming the locking position 34 has penetrated so far into the remaining guide element 24b that the section 44b forming the locking position 34 releases the coupling section 22b. The restoring force of the spring 80b pushes the section 44b forming the locking position 34 back into the starting position as soon as the coupling section 22b has passed the section 44b.

Both embodiments of the overload protection device 76a, 76b have the advantage that the evasive movement is automatically reversed by the restoring force of the spring 80a, 80b, so that no repair or other service work is required after the overload protection device has been triggered.

List of reference symbols

10

Locking device

12

Guide rail

14

Sliding element

16

Locking element

18

Coupling element

18a

Swivel arm

18b

disc

18c

Sleds

20

bolt

22

Coupling section

24

Guide element

26

Guideway

28

Entrance opening

30

first deflection surface

32

second deflection surface

33

first given point

34

Locking position

35

concave contact surface

36

third deflection surface

40

second specified point or release position

42

fourth deflection surface

44

Section

46

Bottom of the sliding element

48

Top of the sliding element

50

Bottom of the swivel arm

52

Top of the swivel arm

54

protruding section

56

Guide groove

58

End stop

60

End stop

62

short distance

64

Exit opening

66

Inclined surface

67

alternative guideway

68

alternative guideway

70

third given point

72

fifth deflection surface

74

Overload

76

Overload protection

78

upper edge

80

Feather

82

Inclined surface

A

Rotary axis or swivel axis

Claims (15)

Locking device (10) for the leaf of a door or window, in particular a revolving door or a sliding door, with a guide rail (12), a sliding element (14) that can be moved in the guide rail (12) and a locking element (16) that is arranged in the guide rail (12) so as to be immovable or minimally displaceable but which absorbs shocks and that cooperates with the sliding element (14) via a coupling element (18) to lock the leaf in a predetermined opening position, characterized in that the coupling element (18) is operatively connected to the sliding element (14) and a guide element (24), in particular a slotted guide, is provided on the locking element (16) or vice versa, wherein the guide element (24) delimits a guide track (26) through which the coupling element (18) with a coupling section (22) when the leaf is opened initially beyond the locking position and when the leaf is subsequently moved in the closing direction into one of the predetermined opening position corresponding to the locking position (34) and when the sash is moved again in the opening direction into a release position (40). Locking device (10) according to Claim 1 , characterized in that the guide element (24) has an inlet opening (28) on the front side, namely on the side from which the coupling element (18) approaches when the wing is opened. Locking device (10) according to Claim 1 or 2 , characterized in that the guide element (24a) is closed on the output side, so that the coupling element (18) with the coupling section (22) can only be moved a short distance (62a) beyond the predetermined opening position. Locking device (10) according to Claim 1 or 2 , characterized in that the guide element (24b; 24c; 24d) has a front-side exit opening (64b; 64c; 64d), specifically on the side in the direction of which the coupling element (18) moves when the wing is opened, so that an opening movement of the wing is not limited by the guide element (24b; 24c; 24d). Locking device (10) according to Claim 4 , characterized in that the exit opening (64b; 64d) in the guide element (24b; 24d) is arranged in the course of the guide track (26b; 26d) in front of the locking position (34b; 34d). Locking device (10) according to Claim 4 or 5 , characterized in that the exit opening (64c; 64d) in the guide element (24c; 24d) is arranged in the course of the guide track (26c; 26d) after the locking position (34c; 34d). Locking device (10) according to at least one of the preceding claims, characterized in that the coupling element (18) comprises a pivot arm (18a) equipped with the coupling section (22) which can be pivoted about a pivot axis (A) which runs perpendicular to the plane of the guide rail (12). Locking device (10) according to at least one of the Claims 1 until 6 , characterized in that the coupling element (18) has a rotatable disc (18b) equipped with the coupling section (22) which is rotatable about an axis of rotation (A) which runs perpendicular to the plane of the guide rail (12). Locking device (10) according to at least one of the Claims 1 until 5 , characterized in that the coupling element (18) has a carriage (18c) equipped with the coupling section (22), which can be moved transversely to the displacement direction of the sliding element (14) and parallel to the plane of the guide rail (12). Locking device (10) according to at least one of the preceding claims, characterized in that the sliding element (14) comprises a bolt (20) aligned perpendicular to the plane of the guide rail (12) which can be connected to a closing lever of a door closer. Locking device (10) according to Claim 10 , characterized in that the coupling element (18) is connected to the sliding element (14) in a tensile and compressive manner, and the coupling element (18) is rotatable or pivotable about the longitudinal axis of the bolt (20). Locking device (10) according to at least one of the preceding claims, characterized in that an overload protection (76) is provided which is designed to release a positive connection between the coupling section (22) and the guide element (24) in the locking position (34) if an overload (74) acts between the coupling section (22) and the guide element (24). Locking device (10) according to Claim 12 , characterized in that the coupling section (22) and/or a section (44) of the guide element (24) forming the locking position (34) have an inclined surface (66, 82) which rests against the section (44) of the guide element (24) or the coupling section (22) in the locking position (34), and that the coupling element (18) and/or the section (44) of the guide element (24) are designed to carry out an evasive movement perpendicular to the plane of the guide rail (12) against a restoring force, in particular a spring (80), in the event of an overload (74) acting between the coupling section (22) and the guide element (24). Locking device (10) according to at least one of the preceding claims, characterized in that the guide element (24) has: a first deflection surface (30) which deflects the coupling element (18) when the sliding element (14) moves in the opening direction in a direction transverse to the direction of displacement of the sliding element (14), a second deflection surface (32) following thereon which deflects the coupling element (18) back again when the sliding element (14) moves further in the opening direction in the opposite direction transverse to the direction of displacement of the sliding element (14) up to a first predetermined point (33), a concave contact surface (35) pointing in the opening direction of the sliding element (14), in the central region of which the locking position (34) is defined and which extends on the one hand to opposite the first predetermined point (33) and on the other hand to opposite a third deflection surface (36) which guides the coupling element (18) further in the same direction when the sliding element (14) moves in the opening direction. Direction as the second deflection surface (32) up to a second predetermined point (40) which lies transversely to the side of the concave contact surface (35), and a fourth deflection surface (42) which deflects the coupling element (18) back in the first deflection direction up to a starting position viewed in the transverse direction when the sliding element (14) moves in the closing direction. Locking device (10) according to Claim 14 , characterized in that in the case of a guide element (24d) with an exit opening (64d) before and after the locking position (34d), this has a fifth deflection surface (72d) which is provided in the region of the exit opening (64d) present before the locking position (34d) and which, when the sliding element (14) moves in the opening direction, deflects the coupling element (18) further in the same direction as the second deflection surface up to a third predetermined point (70d) which has the same position in the transverse direction as the second predetermined point (40d).

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