GB2565620A

GB2565620A - Fixing device

Info

Publication number: GB2565620A
Application number: GB1807353.6A
Authority: GB
Inventors: Wörner Benjamin
Original assignee: Geze GmbH
Current assignee: Geze GmbH
Priority date: 2017-06-21
Filing date: 2018-05-04
Publication date: 2019-02-20
Anticipated expiration: 2038-05-04
Also published as: FR3068062B1; DE102017210363B4; GB2565620B; DE102017210363A1; FR3068062A1; GB201807353D0

Abstract

The invention relates to a fixing device 10 for the leaf of a door or of a window, in particular of a revolving door or of a sliding door. The device comprises a guide rail 12, a sliding element 14, which is displaceable in the guide rail, and a fixing element 16, which is arranged non-displaceably in the guide rail. The fixing element interacts by means of a coupling element with the sliding element in order to fix the leaf in a predefined open position. The coupling element 18 is connected to the sliding element in a tension- and compression-resistant manner, and a guide element 24, in particular a slotted guide, is provided on the fixing element, or vice versa. The guide element delimits a guide path (26 figure 2a) by which the coupling element is moved via a coupling portion as the leaf is opened, firstly beyond the fixed position and, with subsequent movement of the leaf in the closing direction, into a latching position corresponding to the predefined open position, and, as the leaf is moved again in the opening direction, into a release position.

Description

Fixing device

The present invention relates to a fixing device for the leaf of a door or of a window, in particular of a revolving door or of a sliding door, comprising a guide rail, a sliding element which is displaceable or minimally displaceable in the guide rail, yet is shock-absorbing, and comprising a fixing element, which is arranged nondisplaceably in the guide rail and which interacts with the sliding element by means of a coupling element in order to fix the leaf in a predefined open position.

In order to fix in position a door equipped with a door closer with guide rail, what is known as a sliding block is often held in place and is displaced in the guide rail as the door is opened and closed. This is usually achieved by means of a springprestressed latching means, which acts laterally on the sliding block and which latches in a recess on the sliding block at a specific door angle. If the door is sought to be closed, a user must pull on the door handle or the door leaf using significant force so that the spring-prestressed latching means can be released again from its latching position and the latching means thus releases the door leaf.

These fixing devices have the disadvantage that a loud bothersome noise is created as the door leaf is released. Wear and damage on the sliding block and on the latching means can also arise as a result of the constant latching and unlatching of the latching means. In addition, the known fixing assemblies have the disadvantage that they have to be adapted to the closing force of the door closer. This is because if the holding force transferred from the latching means to the sliding block is too weak, the door leaf will not be reliably held in place. On the other hand, an excessive holding force leads to an increased noise nuisance and an increased force required to close the door.

The object of the invention is to create a fixing device for the leaf of a door or of a window which can be released quietly and with little wear.

The object is achieved by a fixing device having 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 fixing element, or vice versa, wherein the guide element delimits a guide path by which the coupling element is moved via a coupling portion as the leaf is opened, firstly beyond the fixed position and, with subsequent movement of the leaf in the closing direction, into a latching position corresponding to the predefined open position, and, as the leaf is moved again in the opening direction, into a release position.

The door leaf is released in a largely noiseless manner by the fixing according to the invention as a result of a relatively light short push in the opening direction. There is no adjustment of a holding force, as is necessary in the case of the above-described fixing devices having latching means.

Advantageous embodiments can be inferred from the dependent claims, the description, and the drawings.

According to an advantageous embodiment, the guide element has an end-face inlet opening. The inlet opening is arranged on the side of the guide element from which the coupling element approaches the guide element as the leaf is opened. The side is dependent on whether the coupling element is connected to the sliding element or the fixing element.

The guide element, according to one embodiment, is also closed on the side opposite the inlet so that the coupling element can be moved via the coupling portion only a short distance beyond the predefined open position. For example, a short distance can mean a distance between 1 cm and 5 cm. An embodiment of this kind is advantageous if the door leaf is to be fixable in precisely one fixed position.

Alternatively, the guide element can have an outlet opening. The outlet opening is arranged on the side in the direction of which the coupling element moves as the leaf is opened. The outlet opening ensures that an opening movement of the leaf is not delimited by the guide element. This embodiment is expedient, for example, if the door leaf is to be fixable in a plurality of fixed positions. To this end, a plurality of fixing elements is preferably arranged in succession along a guide rail, each of which define a fixed position.

According to one embodiment, the outlet opening is arranged in the guide element before the latching position in the course of the guide path.

Alternatively or additionally, the outlet opening can be arranged in the guide element after the latching position in the course of the guide path. The outlet opening can thus be arranged exclusively after the latching position in the course of the guide path. However, it is also possible that an outlet opening in each case is arranged before and after the latching position in the course of the guide path.

So that the coupling portion can move as freely as possible along the guide path of the guide element, the coupling element preferably comprises a pivot arm that is equipped with the coupling portion and that is pivotable about a pivot axis extending perpendicular to the plane of the guide rail. Guide rails are generally channel-shaped, i.e. they have two substantially vertical guide surfaces and one horizontal base surface connecting the guide surfaces. In this case, the base surface defines the plane of the guide rail.

Alternatively to the last-described embodiment having the pivot arm, the coupling element can have a rotatable disc provided with the coupling portion, wherein the disc is rotatable about a rotation axis extending perpendicular to the plane of the guide rail. This embodiment is expedient in particular if the structurally required distance between the coupling portion and the rotation axis is short.

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

In order to easily fasten a closer lever of a door closer to the sliding element, the sliding element can comprise a bolt oriented perpendicularly to the plane of the guide rail, which bolt can be connected to the closer 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 mounted rotatably in the sliding element and the coupling element can be connected to the bolt non-rotatably. Alternatively, the bolt can be connected to the sliding element non-rotatably and the coupling element can be rotatably connected to the bolt. As a third alternative, it is conceivable to connect both the sliding element and the coupling element rotatably to the bolt.

So as not to damage the fixing device in the event of an overload, for example due to improper pulling on the leaf in the direction of the closing direction of the leaf, an overload protection means can be provided on the fixing device, which overload protection means is designed to cancel a form fit between the coupling portion and the guide element in the latching position if an overload is acting along the direction of extension of the guide rail between the coupling portion and the guide element.

The overload protection means can be provided in a simple manner in that the coupling portion and/or a portion of the guide element forming the latching position have/has an inclined surface which, in the latching position, bears against the portion of the guide element or the coupling portion, and in that the coupling element and/or the portion of the guide element are/is designed to perform an evasive movement perpendicular to the plane of the guide rail and against a restoring force, in particular a spring, when an overload acts between the coupling portion and the guide element.

In order to be able to perform a movement perpendicular to the plane of the guide rail in the event of an overload, the coupling portion can be pivotable perpendicularly to the plane of the guide rail. For example, the coupling portion is connected to the sliding element or the fixing element by means of a coupling element formed as an arm, which can be pivoted or deformed such that the coupling portion can release from the guide element, in particular from the slotted guide. In order to reliably ensure that the coupling portion and guide element slide over one another, said inclined surface is provided on the coupling portion and/or the guide element.

So that the fixing device can be used again immediately once the overload protection means have been triggered, i.e. without having to manually reset the overload protection means, a spring can be provided and arranged such that the coupling element and/or the guide element are/is moved against a spring force of the spring as the overload protection means is triggered.

According to one embodiment, the guide element has the following elements: a first deflection surface, which deflects the coupling element, as the sliding element moves in the opening direction, in a direction transverse to the direction of displacement of the sliding element, a second, successive deflection surface, which, as the sliding element is moved further in the opening direction, directs the coupling element back again in the opposite direction transverse to the direction of displacement of the sliding element as far as a first predefined point, a concave contact surface pointing in the opening direction of the sliding element, in the middle region of which the latching position is defined and which reaches on the one hand up until opposite the first predefined point and on the other hand up until opposite a third deflection surface, which, as 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 second predefined point, which is to the side of the concave contact surface in the transverse direction, and a fourth deflection surface, which, as the sliding element moves in the closing direction, deflects the coupling element back again in the first deflection direction up to a starting position as viewed in the transverse direction.

A guide element of this kind having deflection surfaces has the advantage that the coupling element and the coupling portion are reliably guided. Generally, however, other types of guide are also possible, for example by means of a plurality of magnets.

With a guide element having an outlet opening before and after the latching position, the guide element can have a fifth deflection surface, which is provided in the region ofthe outlet opening provided before the latching position and which deflects the coupling element further in the same direction, as the second deflection surface as the sliding element moves in the opening direction, up to a third predefined point, which has the same position in the transverse direction as the second predefined point. A plurality of guide elements of this kind can be arranged along the guide rail in order to be able to fix the door leaf in various latching positions and make the opening of the door leaf beyond a latching position as smooth as possible.

The invention will be described hereinafter on the basis of purely exemplary embodiments with reference to the accompanying drawings. In the drawings:

Fig. 1A	shows the basic structure of a fixing device according to the invention in a plan view;
Fig. 1B	shows the basic structure of the fixing device from figure 1A in side view, wherein, however, the guide rail has not been shown for reasons of improved clarity;
Fig. 2A to 2F	show the procedure of fixing and releasing the fixing device from figure 1A;
Fig. 3A	shows a sliding element with a coupling element according to a first embodiment;
Fig. 3B	shows the sliding element according to figure 3A in sectional view;
Fig. 3C	shows a sliding element with a coupling element according to a second embodiment;
Fig. 3D	shows a sliding element with a coupling element according to a third embodiment;
Fig. 4A	shows a guide element according to a first embodiment;
Fig. 4B	shows a guide element according to a second embodiment;
Fig. 4C	shows a guide element according to a third embodiment;
Fig. 4D	shows a guide element according to a fourth embodiment;

Fig. 5A

Fig. 5B

Fig. 5C

Fig. 5D shows a fixing device with an overload protection means according to a first embodiment, wherein the overload protection means has not yet been triggered;

shows a fixing device with an overload protection means according to the first embodiment, in which the overload protection means has been triggered;

shows a fixing device with an overload protection means according to a second embodiment, wherein the overload protection means has not yet been triggered; and shows a fixing device with an overload protection means according to the second embodiment, in which the overload protection means has been triggered.

The structure of a fixing device 10 according to the invention is shown in figures 1A and 1B. The fixing device 10 is suitable for holding the leaf of a door associated with the fixing device 10, in particular of a revolving door or of a sliding door, or of a window associated with the fixing device 10 in a predefined open position. To this end, a guide rail 12 is mounted for example on the door frame or window frame. A sliding element 14 is mounted in said guide rail 12 so as to be displaceable along the guide rail 12. A fixing element 16 having a guide element formed as a slotted guide 24 is also arranged in the guide rail 12 and is accommodated in the guide rail 12 in a non-displaceable and stationary manner. A coupling element 18 is mounted on the sliding element 14, which in the present exemplary embodiment can also be referred to as a sliding block. The coupling element 18 is formed as a pivot arm and is pivotable 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 portion 22 is mounted or formed, which can engage in the slotted guide of the fixing element 16. In other words, the coupling portion 22 is arranged at a height matching the height of the slotted guide of the fixing element 16 at least in part (figure 1B). By contrast, the sliding element 14 is arranged at a height not matching the height of the fixing element 16, so the sliding element 14 can overrun the fixing element 16.

Different variants of the sliding element 14 will be described in greater detail with reference to figures 3A to 3D and different variants of the slotted guide will be described in greater detail with reference to figures 4A to 4D.

Figures 2A to 2F describe the operating principle of the fixing device 10 described with reference to figures 1A and 1B. In a starting position (figure 2A), which, for example, is present when the door leaf is closed, the sliding element 14 is arranged in a region in the guide rail 12 distant from the fixing element 16 (said region not shown in figures 2A to 2F). The coupling portion 22 of the coupling element 18 is not yet arranged on a guide path 26 formed by the slotted guide 24 of the fixing element 16. If, by an opening of a door, i.e. by a revolving opening of a revolving leaf or a sliding of a sliding leaf, the sliding element 14 is moved in the direction of the fixing element 16 formed as a slotted guide 24, the coupling portion 22 of the coupling element 18 enters the guide path 26 delimited by the slotted guide 24 through an inlet opening 28 and is directed along the guide path 26 by the slotted guide 24. In figure 2B the coupling portion 22 contacts a first deflection surface 30, which, as the door is opened, presses the coupling portion 22 to the left (upwards in the drawings) relative to the direction of displacement of the sliding element 14. The guide path 26 describes a right curve after the left curve, such that the coupling portion 22 is pressed to the right again (downwards in the drawings) by means of a second deflection surface 32 until the coupling portion 22 has reached a first predefined point 33.

The state in which the coupling portion 22 has reached the first predefined point 33 is shown in figure 2C. The door is now opened to such an extent that it can be brought into a latching position 34. By releasing the door leaf when the coupling portion 22 is at the first predefined point 33, a door closer can retract the sliding element 14 in the closing direction, i.e. in the direction in which the sliding element 14 moves as the door leaf closes (to the left in the drawings). As can be seen in figure 2D, the coupling portion 22 is hereby moved against a concave contact surface 35, in the middle region of which the latching position 34 is defined and which on the one hand reaches up until opposite the first predefined point 33 and on the other hand reaches up until opposite a third deflection surface 36. In figure 2D the sliding element 14 is held by means of the coupling element 18 on the fixing element 16 in the latching position 34, which can also be referred to as the fixed position, in which the coupling portion 22 bears in a form-fitting manner against the concave contact surface 35 and is held thereby. The coupling element 18 and the concave contact surface 35 form a metastable system so to speak, which can be cancelled by pushing against the door leaf in an opening direction of the leaf. This is shown in figure 2E. By pushing against the door leaf in the opening direction of the leaf, the sliding element 14 is displaced in the opening direction along the guide rail (to the right in the drawings) so that the coupling portion 22 comes into contact with the third deflection surface 36 and is pushed outwards to the right by said deflection surface (downwards in the drawings). At the end of the third deflection surface 36, a second predefined point 40 is defined by the guide element 24. If the coupling portion 22 is arranged at this second predefined point 40, the fixing device 10 is decoupled again. The fixing device 10 thus decouples automatically as soon as the door leaf is moved a certain distance in the opening direction of the leaf from the latching position 34. If the door leaf is now released, the door closer pulls the sliding element 14 along the guide path 26, past the concave contact surface 35 defining the latching position 34. In the closing direction of movement of the coupling portion 22, a fourth deflection surface 42 (figure 2F) is provided on the slotted guide 24 before the inlet opening 28 and directs the coupling element 22 back in the closing direction of movement of the coupling portion 22 to the right (upwards in the drawings) as far as the inlet opening 28, which is arranged centrally in the transverse direction.

Generally, the guide path 26 thus describes a closed path which can be travelled exclusively in one direction. Here, a portion 44 of the guide element 16 defining the latching position 34 is arranged in the middle of the guide path 26.

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

A sliding element 14a formed as a sliding block is shown in figure 3A, having the axis A of a bolt 20a extending at the geometrical centre point. The coupling element 18 is formed as a pivot arm 18a, which is mounted on the bolt 20a so as to be pivotable about the axis A of the bolt 20a. A coupling portion 22 in the form of a conical pin 22a is mounted on the pivot arm 18a in an end portion distant from the sliding element 14a. The pivot arm 18a has a slight S-shaped curvature, which can be best seen in figure 1B. The end of the pivot arm 18a distant from the coupling portion 22 bears against an underside 46a of the sliding element 14a. The coupling portion 22a protrudes from a corresponding underside 50a of the pivot arm 18a, so the height region in which the coupling portion 22a lies does not have any overlap with the height region in which the sliding element 14a lies.

As can be seen in figure 3B, the bolt 20a protrudes from the side of the sliding element 14 facing away from the coupling element 18a. A protruding portion 54a thus formed can be connected to a closer lever (not shown) of a door closer, in particular non-rotatably.

An alternative embodiment of a sliding element 14 is shown in figure 3C. Instead of the pivot arm, a disc 18b is provided according to this embodiment as a coupling element and is connected to a sliding element 14b in a manner rotatable about the axis A of a bolt 20b. On the side 50b of the rotatable disc 18b facing away from the sliding element 14b, a conical coupling portion 22b protruding perpendicularly to the plane of the guide rail 12 is formed.

A further alternative embodiment for designing a sliding element 14c is shown in figure 3D. In this embodiment, the coupling element is formed by a carriage 18c, which is movable perpendicularly 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 portion 22c, which moves with the carriage 18c. So that the carriage 18c is movable perpendicularly 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 before a bolt 20c.

Figures 4A to 4D also show different guide elements 24a to 24d formed as a slotted guide.

A guide element 24a according to a first embodiment is shown in figure 4A. The guide element 24a forms a slotted guide that cannot be overrun. The slotted guide describes a guide path 26a, the start 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. End stops 58a, 60a are provided at the first predefined point 33a and at the second predefined point 40a respectively and prevent the coupling portion 22 from moving further in the opening direction (to the right in the drawings). The coupling portion 22 can hereby travel only a short distance 62a beyond the predefined open position and thus the latching position 34a.

In figure 4B, which shows a guide element 24b according to a second embodiment, the guide path 26b is open at the first predefined point 33b, so a movement of the coupling portion 22 in the opening direction is not delimited by the guide element 24b. There is an outlet opening 64b, which is arranged before the latching position 34b in the course of the guide path 26b. In other words, the coupling portion 22, in the course of the guide path 26b, can follow an alternative guide path 67b at the first predefined point 33b, which alternative guide path does not lead to the latching position 34b, but instead to the outlet opening 64b. By contrast, at the second predefined point 40b, a stop 60b is provided so that the coupling portion 22 is prevented at this point 40b from moving in the opening direction (to the right in the drawings).

In the exemplary embodiment shown in figure 4C, the guide path 26c is open at the second predefined point 40c so that a movement of the coupling portion 22 at the second predefined point 40c in the opening direction is not delimited by the guide element 24c. The guide element 24c defines an outlet opening 64c, which is arranged after the latching position 34c in the course of the guide path 26c. The coupling portion 22 must thus have been in the latching position 34c in the course of the guide path 26c before it can be guided through the outlet opening 64c.

In figure 4D a guide element 24d can be seen, the guide path 26d of which is open at the first predefined point 33d and at the second predefined point 40d. A movement of the coupling portion 22 in the opening direction is hereby not delimited by the guide element 24d, either at the first predefined point 33d or at the second predefined point 40d. Two different alternative guide paths 67d, 68d lead to the outlet opening 64d, wherein the first alternative guide path 67d starts at the first predefined point 33d and the second alternative guide path 68d starts at the second predefined point 40d, and the two alternative guide paths merge at a third predefined point 70d. To this end, a fifth deflection surface 72d is provided, which deflects a coupling portion 22, moving along the first alternative guide path 67d, in the transverse direction, i.e. transversely to the opening direction, until the coupling portion 22 is arranged at the third predefined point 70d in the second alternative guide path 68d. The second predefined point 40d and the third predefined point 70d have the same position in the transverse direction, i.e. their distance to the central axis of the guide element 24d extending in the direction of displacement is identical.

A plurality of the open guide elements 24b, 24c or 24d can be arranged along a guide rail 12 so that the door leaf can be fixed in a plurality of latching positions 34b, 34c, 34d. For simple accommodation of the coupling portion 22, the inlet opening 28 and the outlet opening 64 are formed in the shown embodiments such that they each taper in the direction of the centre of the guide element 24.

So that, in the event of an overload 74 on the fixing device 10, said fixing device is not damaged, an overload protection means 76 can be provided on the fixing device 10, as shown in particular in figures 5A to 5D. This overload protection means is designed to cancel a form fit between the coupling portion 22 and the guide element 24 in the latching position 34 if the force acting between the coupling portion 22 and the guide element 24 exceeds a threshold value. Figures 5A and 5B show a first alternative of how an overload protection means 76a of this kind can be provided. The coupling portion 22a is conical and thus has an inclined surface 66a. This inclined surface 66a is in contact, in the latching position 34, with an upper edge 78a of the concave contact surface 35a. If an overload 74 acts on the sliding element 14, the conical coupling portion 22a slides out from the guide element 24 along the upper edge 78a (figure 5B). Whilst the conical coupling portion 22a slides out from the guide element 24, the coupling element 18a formed as a pivot arm deforms elastically. The pivot arm 18a thus acts as a spring 80a, which holds the coupling portion 22a in the guide path 26 in the case of regular use and releases it for an evasive movement in the event of an overload 74.

Figures 5C and 5D show a second embodiment of an overload protection means 76b. Here, the portion 44b forming the latching position 34 and the coupling portion 22b each have an inclined surface 82b, 66b. The inclined surfaces 66b, 82b bear flat against one another in the event of regular load, without sliding over one another, when the coupling portion 22b is in the latching position 34. If, however, an overload 74 is acts between the coupling portion 22b and the portion 44b forming the latching position 34, the portion 44b forming the latching position 34 moves out of the way perpendicularly to the plane of the guide rail 12 against a spring force of a spring 80b. To this end, the portion 44b forming the latching position 34 is mounted in the rest of the 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 portion 22b slides here along the inclined surface 82b until the portion 44b forming the latching position 34 has entered the rest of the guide element 24b to such an extent that the portion 44b forming the latching position 34 releases the coupling portion 22b. As a result of the restoring force of the spring 80b, the portion 44b forming the latching position 34 is pushed back again into the starting position as soon as the coupling portion 22b has passed the portion 44b.

Both embodiments of the overload protection means 76a, 76b have the advantage that the evasive movement is automatically reversed again by the restoring force of the spring 80a, 80b, so there is no need for any repairs or servicing after the overload protection means has been triggered.

List of reference symbols

10	Fixing device
12	Guide rail
14	Sliding element
16	Fixing element
18	Coupling element
20	Bolt
22	Coupling portion
24	Guide element
26	Guide path
28	Inlet opening
30	First deflection surface
32	Second deflection surface
33	First predefined point
34	Latching position
35	Concave contact surface
36	Third deflection surface
40	Second predefined point
42	Fourth deflection surface
44	Portion
46	Underside of the sliding element
48	Upper side of the sliding element
50	Underside of the pivot arm
52	Upper side of the pivot arm
54	Protruding portion
56	Guide groove
58	End stop
60	End stop
62	Short path
64	Outlet opening
66	Inclined surface
67	Alternative guide path
68	Alternative guide path

70	Third predefined point
72	Fifth deflection surface
74	Overload
76	Overload protection means
5 78	Upper edge
80	Spring
82	Inclined surface
A	Axis

Claims

1. A fixing device (10) for the leaf of a door or of a window, in particular of a revolving door or of a sliding door, comprising a guide rail (12), a sliding element (14), which is displaceable in the guide rail (12), and a fixing element (16), which is arranged non-displaceably or minimally displaceably in the guide rail (12), yet is shock-absorbing, and which interacts with the sliding element (14) by means of a coupling element (18) in order to fix the leaf in a predefined open position, characterised 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 fixing element (16), or vice versa, wherein the guide element (24) delimits a guide path (26) by which the coupling element (18) is moved via a coupling portion (22) as the leaf is opened, firstly beyond the fixed position and, with subsequent movement of the leaf in the closing direction, into a latching position (34) corresponding to the predefined open position, and, as the leaf is moved again in the opening direction, into a release position (40).

2. The fixing device (10) according to claim 1, characterised in that the guide element (24) has an end-face inlet opening (28), more specifically on the side from which the coupling element (18) approaches as the leaf is opened.

3. The fixing device (10) according to claim 1 or 2, characterised in that the guide element (24a) is closed on the outlet side so that the coupling element (18) can be guided via the coupling portion (22) only over a short distance (62a) beyond the predefined open position.

4. The fixing device (10) according to claim 1 or 2, characterised in that the guide element (24b; 24c; 24d) has an end-face outlet opening (64b; 64c; 64d), more specifically on the side in the direction of which the coupling element (18) moves as the leaf is opened, so that an opening movement of the leaf is not delimited by the guide element (24b; 24c; 24d).

5. The fixing device (10) according to claim 5, characterised in that the outlet opening (64b; 64d) is arranged in the guide element (24b; 24d) before the latching position (34b; 34d) in the course of the guide path (26b; 26d).

6. The fixing device (10) according to claim 4 or 5, characterised in that the outlet opening (64c; 64d) is arranged in the guide element (24c; 24d) after the latching position (34c; 34d) in the course of the guide path (26c; 26d).

7. The fixing device (10) according to at least one of the preceding claims, characterised in that the coupling element (18) comprises a pivot arm (18a), which is provided with the coupling portion (22) and which is pivotable about a pivot axis (A) extending perpendicularly to the plane of the guide rail (12).

8. The fixing device (10) according to at least one of claims 1 to 6, characterised in that the coupling element (18) has a rotatable disc (18b) which is provided with the coupling portion (22) and which is rotatable about a rotation axis (A) extending perpendicularly to the plane of the guide rail (12).

9. The fixing device (10) according to at least one of claims 1 to 5, characterised in that the coupling element (18) has a carriage (18c), which is provided with the coupling portion (22) and which is movable transversely with respect to the direction of displacement of the sliding element (14) and parallel to the plane of the guide rail (12).

10. The fixing device (10) according to at least one of the preceding claims, characterised in that the sliding element (14) comprises a bolt (20), which is oriented perpendicularly to the plane of the guide rail (12) and which can be connected to a closer lever of a door closer.

11. The fixing device (10) according to claim 10, characterised in that the coupling element (18) is connected to the sliding element (14) in a tensionand compression-resistant manner, and the coupling element (18) is rotatable or pivotable about the longitudinal axis of the bolt (20).

12. The fixing device (10) according to at least one of the preceding claims, characterised in that an overload protection means (76) is provided, which is designed to cancel a form fit between the coupling portion (22) and the guide element (24) in the latching position (34) if an overload (74) acts between the coupling portion (22) and the guide element (24).

13. The fixing device (10) according to claim 12, characterised in that the coupling portion (22) and/or a portion (44) of the guide element (24) forming the latching position (34) have/has an inclined surface (66, 82), which in the latching position (34) bears against the portion (44) of the guide element (24) or the coupling portion (22), and in that the coupling element (18) and/or the portion (44) of the guide element (24) are/is designed to perform an evasive movement perpendicularly to the plane of the guide rail (12), against a restoring force, in particular of a spring (80), in the event of an overload (74) acting between the coupling portion (22) and the guide element (24).

14. The fixing device (10) according to at least one of the preceding claims, characterised in that the guide element (24) has:

a first deflection surface (30), which deflects the coupling element (18), as 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 successive deflection surface (32), which, as the sliding element (14) is moved further in the opening direction, directs the coupling element (18) back again in the opposite direction transverse to the direction of displacement of the sliding element (14) as far as a first predefined point (33), a concave contact surface (35) pointing in the opening direction of the sliding element (14), in the middle region of which the latching position (34) is defined and which reaches on the one hand up until opposite the first predefined point (33) and on the other hand up until opposite a third deflection surface (36), which, as the sliding element (14) moves in the opening direction, deflects the coupling element (18) further in the same direction as the second deflection surface (32) up to a second predefined point (40), which lies to the side of the concave contact surface (35) in the transverse direction, and a fourth deflection surface (42), which directs the coupling element (18) back again in the first deflection direction up to a starting position as viewed in the transverse direction when the sliding element (14) moves in the closing direction.

15. The fixing device (10) according to claim 14, characterised in that with a guide element (24d) having an outlet opening (64d) before and after the latching position (34d), the guide element has a fifth deflection surface (72d), which is provided in the region of the outlet opening (64d) provided before the latching position (34d) and which deflects the coupling element (18) further in the same direction as the second deflection surface when the sliding element (14) moves in the opening direction, up to a third predefined point (70d), which has the same position in the transverse direction as the second predefined point (40d).