EP0386600B1 - Control device for the closure sequence of double-wing doors - Google Patents

Abstract

When two swivel wings closing a wall aperture or the like are equipped with rebates (6, 7), a complete closure of the two wings can be obtained only when a specific closing sequence is adhered to. Where a passage wing (1) and a standing wing (2) are concerned, in principle the standing wing has to be closed before the passage wing can be closed. It is possible, however, to keep the passage wing in a particular opening position until the opened standing wing has been swung past it in the closing direction. This opening position of the passage wing is secured automatically by means of a blocking device (24) when the standing wing (2) is in an opening position, and it is unimportant how far it is opened. A closing-sequence control consists of a catch mechanism assignable to the door closer (10) of the passage wing (1) and of a release mechanism assignable to the door closer (11) of the standing wing (2), these mechanisms being coupled purely mechanically to one another via a tension member (37). <IMAGE>

Description

The invention relates to a device for controlling the closing sequence of two leaves of windows, doors and the like which can be closed by means of a door closer, namely a first opening leaf and a subsequently opening passive leaf, each door closer being equipped with a drive axis and the drive axis of the leaf carries a locking cam which, with a spring-loaded locking lever, forms a locking device for the partially opened active leaf, which enables the correct closing sequence, and which is coupled via a tension member to a trigger lever, which forms a triggering device for the locking lever with a leaf-side trigger, the locking lever approximately in the Closed position of the passive leaf assumes its ineffective position. The two to be equipped with the device and each by means of a door closer closing wings are rotatably articulated on their distant vertical sides. In contrast to swing doors, however, they are only opened in one direction. In the normal case, both wings are provided with rebates, which is why one wing must always be closed in front of the other. Only in this way is it possible for the folds to interlock or for the second door to be closed at all without being impeded by the fold of the first door. For the sake of simplicity, it is assumed below that the wing is a door wing, without this being to be understood as restrictive. For this reason there is also talk of a "door closer".

Often, such double-leaf doors keep one normally closed, which is why it is referred to as the passive leaf, while the other is constantly opened and closed, or is held in an open position for a while. It is therefore referred to as the "active wing". Both doors are equipped with a door closer of a known type, which, if they have not been found, turns them back into the closed position immediately after their release. In the case of a locking device, this must be released manually or automatically before closing so that the door closer can perform its closing function.

If it is smoke and fire protection doors, one can Such locking device in the event of fire can be automatically solved by an appropriate monitoring device. It must then be ensured that the closing sequence of the two doors is strictly observed, otherwise the doors cannot be closed completely. One can close one door, in particular the active leaf, up to a relatively small open position, but it must then remain in this position until the other leaf or the passive leaf has at least largely assumed its closed position. It is assumed below that the passive leaf must always be closed before the active leaf.

Devices for controlling the closing sequence of two doors already exist, each of which can be closed by means of a door closer. Door closers here are understood in the usual way to be a device which basically loads the leaf in the closing direction of rotation and whose force can have an effect if no other forces acting in the opening sense or holding forces act on the opened or partially opened leaf and the leaf also does not has been arrested. Such door closers can be located in a known manner both at the top and at the bottom of the door.

For example, a device for controlling the closing sequence, also known as a wear sequence controller, has become known, in which a hydraulic valve in the overflow line of the door closer is controlled via the passive leaf. Because of the leaks in the hydraulic system that cannot be avoided with absolute safety and the sensitivity of the control elements in the event of a fire, in many cases such devices are not sufficiently reliable.

DE-36 12 917 A1 discloses a device for controlling the closing sequence of two leaves of windows, doors and the like which can be closed by means of a door closer. Upper door closers are used here, which are mounted directly on the upper end of the door and connected to the fixed frame via a locking linkage. A Bowden cable attached to the fixed frame of the inactive leaf requires a contact projection which acts on the actuating lever on the fixed frame side. On the active leaf side, the device is located in the door closer, where it can be protected, while it is completely exposed on the passive leaf side. It is considered disadvantageous that part of the control device must be installed on the passive leaf and that important elements of this device are exposed on the fixed frame.

EP-0 166 859 describes a device for regulating the closing sequence of double-leaf doors, each of which is connected to a floor door closer. In the floor door closer assigned to the passive leaf, an actuation unit is integrated which preferably controls a valve unit in the floor door closer assigned to the active leaf via a Bowden cable. The Bowden cable is laid in the floor so that the door and frame no parts need to be assembled. With this closing sequence control, the closer of the passive leaf acts on the hydraulics of the active leaf.

In connection with overhead door closers, up to now primarily levers have been used for closing sequence control, which are attached in the upper horizontal door area. In addition to the disruptive optics, the risk of damage is criticized, although it is ultimately irrelevant whether this damage was willful or accidental. In any case, when the passive leaf is open, the control arm protrudes towards the interior of the room and, as a result, it is particularly exposed to the risk of damage in this door position.

Furthermore, in conjunction with floor door closers, closing sequence controllers which are already concealed are also known. However, it is a mechanical-hydraulic system, in the hydraulic part of which the so-called "creep" is inevitable. It can thus happen that the doors close slowly for doors that remain open for a longer period of time without the closing sequence control being able to take effect.

Another disadvantage is that you have to know from the outset whether the device should be used in conjunction with a right or left DIN door closer. In addition, the installation box for the floor must be dimensioned larger than with normal door closers. Of course, this also makes a bigger one Cover plate required. This leads to a correspondingly large inventory for the manufacturer and the dealer.

The object of the invention is therefore to develop a closing sequence control of the type described in the opening paragraph in such a way that, with an attractive appearance, the functional reliability is improved and a robust and inexpensive construction which positively influences the storage is created.

To achieve this object, it is proposed according to the invention that the device is designed according to the preamble of claim 1 in accordance with the characterizing part of this claim. This device works on a purely mechanical basis, which is why the difficulties and sources of failure known with mechanical-hydraulic devices are eliminated. In the case of floor door closers, it can be optically advantageously formed by attaching it below the cover plate of the respective door closer and accommodating the part of the tension member located between the door closers in the floor. As a result, this variant also eliminates the risk of damage, which are unavoidable in the prior art due to exposed rods projecting into the room. In addition to the increased functional reliability due to the lack of hydraulic components, this device is characterized by high robustness for the same reason, and it can be manufactured very inexpensively. Furthermore, longer floor boxes and lids can be avoided for floor door closers, which simplifies storage.

If the passive leaf is and remains closed, the active leaf can be opened and closed in a known manner without any influence by this closing sequence control. From this it is also understandable that it does not matter to the special construction of the door closer, rather any known type of door closer can be used, which is equipped with a drive axis for connection to the door leaf. In particular, it is irrelevant whether the door closer is equipped with a locking device and, if so, how it is designed or works. From this it also follows that one is independent of the release of such a locking device, which is why this closing sequence control can also be used in so-called fire doors, in which each opened leaf is closed automatically by means of a smoke or fire detector. Especially in the latter case, it is very important that even when the passive leaf is fully or partially opened, the latter is first brought into the closed position and only then is the active leaf closed. However, the active leaf can be brought into a reasonably closed position, in which it must, however, remain until the fixed leaf is completely closed. This open position of the active leaf depends on the folds, i.e. H. the rebate of the passive leaf must be able to move past that of the active leaf without any hindrance.

When the passive leaf is opened, this triggers the actuation of its release mechanism via the rotary movement of its drive axis in the sense that, via the tension member, the locking lever is transferred by its loading spring or springs into a locking position, which does not allow the active leaf to assume the fully closed position. If, in the closing movement of the passive leaf, the release mechanism and the tension member act on the locking lever in an unlocking sense, this releases the locking cam attached to it, and the force of the active leaf door closer can then have a closing effect.

A preferred embodiment of the invention is characterized in that the tension member is adjustable in length and is formed in the area between the two door closers by a Bowden cable or the like. As is known, a Bowden cable can only transmit tensile forces. If you operate it, you must simultaneously tension one or more springs or tension more. In the present case, it is the load spring or springs of the locking lever. As soon as the force on the Bowden cable is removed, the spring force can have the effect of resetting all parts that move when the Bowden cable is actuated. Due to the length adjustability of the tension member, the Bowden cable can function properly. In addition, Bowden cables can be easily shortened so that the side distance between the two door closers, and thus also the release mechanism from the latching mechanism, can be brought to the necessary level by a corresponding Bowden cable length depending on the respective door widths.

Further advantageous configurations of the device according to the invention and the advantages resulting therefrom result from the following description of an exemplary embodiment.

Fig. 1

schematisch einen Schnitt durch einen mittels zweier Türen verschließbaren Mauerdurchbruch, wobei der Gangflügel nach DIN links und der Standflügel nach DIN rechts angeschlagen ist,

Fig. 2

eine Draufsicht auf die beiden Türschließer mit darüber angeordneter Vorrichtung zur Steuerung der Schließfolge bei abgenommenen Deckeln, wobei einzelne Vorrichtungsteile in horizontaler Richtung geschnitten sind,

Fig. 3

eine Seitenansicht der Fig. 2 bei seitlich aufgebrochenen Einbaukästen,

Fig. 4

in vergrößertem Maßstab einen Ausschnitt aus dem rechten Bildende der Fig. 2.

The drawing shows such an embodiment of the invention. Here represent:

Fig. 1

schematically a section through a wall opening which can be closed by means of two doors, the active leaf according to DIN left and the passive leaf according to DIN right being attached,

Fig. 2

2 shows a top view of the two door closers with a device arranged above for controlling the closing sequence with the covers removed, individual device parts being cut in the horizontal direction,

Fig. 3

3 shows a side view of FIG. 2 with the installation boxes broken open to the side,

Fig. 4

on an enlarged scale, a section of the right end of the figure in FIG. 2.

The two door closers are so-called floor door closers in the embodiment. H. they are recessed in the floor and are consequently located directly or laterally under the door to be closed. 1 in FIG. 1 denotes the so-called active leaf and 2 the so-called passive leaf of a two-leaf door, which together close a wall opening 3. The active leaf 1 is opened in the direction of arrow 4 and the passive leaf 2 in the direction of arrow 5 and closed in the opposite direction. As shown in FIG. 1 of the drawing, they are so-called rebated doors. Here, as can be seen in FIG. 1, the passive leaf 2 can only be closed when the active leaf 1 is at least in a sufficiently wide open position, because otherwise the fold 6 of the passive leaf 2 will not move past the fold 7 of the active leaf 1 can be. The doors are also rebated in the area of their axes of rotation and their fixed frames are profiled accordingly. Because of this design, the axes of rotation in the exemplary embodiment are not located below the door leaf level, but offset laterally to this. The geometric axis of rotation of the active leaf is designated 8 and that of the passive leaf is designated 9.

The active leaf 1 is automatically closed with the help of a door closer 10, designed as a floor door closer, as soon as the manual force on the leaf is eliminated and no other force, for example the holding force of a locking device, holds it in place. The door closer of the passive leaf 2 is designated 11. Each door closer is designed in a known manner and has a drive axis. The drive axis of the door closer 10 is designated by 12 and that of the door closer 11 by 13. Due to the use of the closing sequence control according to the invention, these drive axes are designed somewhat longer than in a door closer of the same type without the closing sequence control. Because the drive axles in the door closers are usually easy to replace, it is no problem to replace a drive axle with a longer one. In addition, in both door closers a housing or a so-called installation box 14 or 15 of conventional cross-sectional dimension, but somewhat larger in height, is used, so that the respectively assigned device part can also be accommodated therein. The cover of the relevant installation box 14 or 15 removed in the drawing is located above the latter. It does not differ from that of a door closer without a closing sequence control.

A locking ring 16 is placed on the drive axle 12 of the door closer or the active leaf 1, which preferably has fine teeth on the inside, with counter teeth on the drive axle 12. The locking ring can be connected to the drive axis 12 in any 360 ° position within the grid specified by the fine toothing. The necessary adjustability of the locking ring 16 is thus ensured.

Analogously, a trigger ring 17 is attached to the drive axis 13 of the door closer 11 or the leaf 2, the connection also advantageously being made there via fine toothing, which ensures the necessary adjustability, seen in the direction of rotation. Both rings are slotted and they can be clamped on their drive shaft 12 or 13 by means of a screw 18 or 19.

The locking ring 16 carries a radially projecting locking cam 20 which, in the position of the active leaf 1 shown in dash-dotted lines, engages in a notch-like recess of a locking lever 23 which can be pivoted about an axis 22 and forms a locking stop 21. The locking cam and the detent stop form a locking device 24.

On the opposite side of the locking lever 23 engages a pressure piece 25 which is spring-loaded by two parallel springs 26 and 27. For the safe introduction of force, the pressure piece 25 is provided with a tip or cutting edge which engages in a correspondingly shaped receptacle of the locking lever 23.

While the spring ends on the left in FIG. 2 rest on the pressure piece 25, the right ends are supported on a pressure member 28 which is connected via a shaft 29 to the one lever arm of a double-armed lever 30. At the other, in Fig. 2 lower lever arm of the double-armed lever 30 is the free end of one Adjusting screw 31. It can be screwed into a bearing block 32 fixed to the housing. It is easy to see that you can change the spring tension by screwing the adjusting screw 31 in or out via the double-armed lever 30. The bearing axis of the double-armed lever 30 is designated 33.

The device part (release mechanism) assigned to the leaf-side door closer 11 is equipped with a release lever 35 which can be pivoted about an axis 34 and which in the exemplary embodiment carries a roller 36, a pin or the like at its free end. This is a double-armed lever, the roller 36 or the like being located on the right lever arm in FIG. 2, while the left lever arm is articulated to a tension member 37, generally designated 37, consisting of a large number of individual elements . The axis of rotation there bears the reference number 38. An essential, or at least the longest element of the tension member 37 is formed by a Bowden cable 39. It is located between the two door closer installation boxes 14 and 15. The latter are equipped with a connecting piece 40 and 41, which allow a protective tube 90 receiving the Bowden cable 39 to be quickly fitted. Screw connections 42 and 43 are used for this.

The wire of the Bowden cable or a corresponding wire rope is designated 44. Its left end 45 in FIG. 2 is held on a sliding member 47 by means of a clamping element 46. Another clamping element 48 holds the right end of the wire rope 44 or. Like. Fixed to a second sliding member 49. Both sliding members are mounted in the sense of the double arrow 50 on an associated device housing 51 or 52 or the like. Each of these two device housings consists of an upper plate 53 and an advantageously identical lower plate 54 as well as interconnecting and spacing elements. Because not only the plates 53 and 54 are identical, in particular consist of the same stamped parts, but also the two device housings 51 and 52, an identical stamped part or the like can be used for all four plates. Of course, this helps to simplify and reduce the cost of the construction and ensures universal installation.

Between the plates 53 and 54 there are bolts 55 and 56 which are fixed to the housing and which penetrate a longitudinal slot 57 of the first sliding member 47. Their side distance is chosen so that the sliding member is longitudinally displaceable to a limited extent. At its left end in FIG. 2, the first sliding member 47 carries a hook 58 which is in particular molded on. It engages around a common knee joint axis 59, whereby it can act on it in both directions of displacement.

As can be seen in FIG. 2, part of the tension member 37 is formed by a toggle lever arrangement. A first toggle lever 60 consists of a first lever 61 and a second lever 62. Their common knee joint axis is designated 63. A second toggle 64 consists of the first lever 65 and the second Lever 66. They are articulated via the common knee joint axis 59 already mentioned. In addition, the first lever 65 of the second toggle lever 64 is articulated on the common knee joint axis 63 of the first toggle lever 60. A housing-fixed axis of rotation of the lever 62 is designated 67, while the outer end of the lever 66 is articulated on another housing-fixed axis 68. These axles fixed to the housing are also located between the housing plates 53 and 54 of the housing 51.

2 that the levers 61 and 62 of the first toggle lever 60 extend approximately in the direction of displacement 50 of the sliding member 47, the toggle lever corner pointing towards the hook 58. For this purpose, the levers 65 and 66 of the second toggle lever 64 run approximately vertically, the toggle lever corner pointing to the right, ie away from the double-armed lever 23. The free end of the lever 61 is connected to a bolt 69, on which the right end of a rod 70 is held, the left end of which is articulated to the free end of the locking lever 23 via a further bolt 71. The bolt 69 is guided in the housing plates 53, 54 so that it can be displaced transversely, the displacement movement running parallel to that of the sliding member 47.

A length adjustment device 73 is connected between the second sliding member 49 of the right-hand device part and a slide 72 which is displaceably guided in the same direction. The longitudinal guidance of the slider 72 is ensured by a bolt 74 connected between the plates 53 and 54 of the device housing 52 and an elongated hole 75 of the slider 72 extending in the direction of displacement.

The length adjustment device 73 consists essentially of a clamping sleeve 76 with right and left-hand threads, a bolt-shaped threaded shoulder 77 or 78 of the associated part 49 or 72 being screwed more or less deeply into each thread. On the outside, the clamping sleeve 76 can be equipped, for example, with a polygonal profile. A housing slot 79 in the plates 53 and 54 ensures the insertion of a corresponding key, with the help of which the twisting and thus the length adjustment can be effected.

One end of an intermediate link 81, the other end of which is linked to the axis of rotation 38 of the release lever 35, is articulated on a bolt 80 of the slide 72. It connects the latter to the slider 72. The tab, the slider and the left end of the release lever 35 together mark a Z-shape. It can also be seen from FIG. 2 that the left lever arm of the release lever 35 is angled, while the right, much shorter one carries the roller 36 already mentioned, which cooperates with a release cam 82 on the release ring 17. Both together form a triggering device 83, the function of which will be explained in more detail below (FIG. 4). The bearing pin 80 is also a guide pin, which engages with its two ends in guide slots 84 of the plates 53 and 54.

It remains to be added that the rod 70 of the locking mechanism encloses an approximately right angle with the longitudinal axis of the locking lever 23, while it engages with the first lever 61 of the first toggle lever 60, at least in the locked position of the active leaf, forms an angle of almost 180 ° with the tip pointing away from the spring 26.

The locking ring 16 and the release ring 17 are, as I said, perpendicular to the image plane (Fig. 2) on their drive axis 12 and 13 respectively. You can pull it off and slide it back on in a position turned by 180 °. As a result, the device for controlling the closing sequence can be used both for a door closer DIN right or DIN left. At the same time, the housing 51 or 52 is also mounted in a position turned by 180 ° on the door closer to go from DIN right to DIN left or vice versa.

The mode of operation of this control device for the closing sequence of two leaves 1, 2, in particular door leaves, which can be closed by means of a door closer 10 or 11 is as follows: when the passive leaf 2 is closed, which, as stated, corresponds to its normal position, the roller 36 lies Release lever 35 in contrast to FIG. 2 on the release cam 82. Compared to the representation in FIG. 2, the right lever arm of the release lever 35 is pivoted counterclockwise upwards and its left lever arm downwards. This results in a displacement of the tension member 37 from left to right via the intermediate link 81. As a result, the locking lever 23 is also in its right pivoting position, in which interaction with the locking cam 20 of the drive axle 12 of the active leaf 1 is not possible. Consequently the active leaf 1 can be opened and closed without any hindrance or interference from the closing sequence control.

Because of the folds 6 and 7, the passive leaf 2 can only be opened if the active leaf 1 has previously been rotated into an open position. After a brief rotary opening movement of the passive leaf 2 in the direction of the arrow 5, the release cam 82 is released from the roller 36, and this then leads to a pivoting of the release lever 35 in the direction of the arrow 86 (FIG. 2). This results in a displacement movement of the tension member 37 from right to left, which results in a pivoting movement of the locking lever 23 in the counterclockwise direction. If the active leaf 1 now performs a rotary closing movement in the direction of arrow 87, its locking cam 20 runs against the detent stop 21 of the locking lever 23, as a result of which the closing movement in the position of the active leaf shown in dash-dotted lines in FIG. 2 is initially ended. Only when the passive leaf 2 is closed again or at least approximately closed is the locking device 24 released via the tension member 37, and then the active leaf 1 can also be fully closed.

Since this device in no way interferes with the action of the door closer, it is not only to be used in connection with the most varied of door closers, but rather the door closer can be used in connection with any of them as before Auxiliary device, such as fire or smoke detectors, can be used. Because of its purely mechanical action and mode of operation, no intervention in the hydraulic system of the door closer is required. In addition, known door closers can be easily retrofitted with this device, a higher, but not a larger installation box — in the case of a floor door closer — and an extended drive axle 12, 13 being required. The door closer can be equipped with an electro-hydraulic or purely mechanical locking device. Versions with electro-hydraulic freewheel devices can also be used without further ado. As I said, the closing sequence control is suitable for right and left doors, but also for differently wide and thus differently heavy leaf weights for the passive leaf and the active leaf. In addition, there is a favorable appearance, because the device can be accommodated, for example, in floor door closers essentially below the installation box cover. This also leads to a lower inventory, because the cover of the installation box does not have to be modified.

Finally, an overload protection should also be mentioned, which consists in the fact that the door can be rotated in the closing direction 87 by the corresponding force acting on the active leaf 1 even with an effective locking device 24, without any parts being damaged thereby. With such a violent closing, the locking cam 20 is simply pressed so strongly against the detent stop 21 that the locking lever 23 is resilient in the clockwise direction evades. Because the inactive leaf cannot be closed after the active leaf due to the folds 6 and 7, one becomes aware of this violent incorrect operation of the active leaf at the latest when the inactive leaf is or should be closed.

It remains to be mentioned that the locking mechanism and the trigger mechanism can be screwed to their door closers 10 and 11 with the aid of fastening screws 88, of which only one has been provided with a reference number in FIG. 2 for the sake of clarity. The housings 51 and 52 have corresponding through bores. Corresponding threads are attached to the door closer from the outset, so that you can easily retrofit later. A total of three attachment points are sufficient.

For easy fastening of both the locking mechanism and the trigger mechanism, a recess for the drive axles 12 and 13 of the door closers 10 and 11 is made on the plates 53 and 54 of the housings 51 and 52, respectively. This recess engages in a projection 89 (FIG. 2) on the locking ring 16 or release ring 17.

Claims (16)

1. Device for controlling the closing sequence of two leaves (1, 2) of a window, door or the like, that is, a movable leaf (1) which can be opened first and a fixed leaf (2) which can be opened subsequently, each of which can be closed by means of a door closer (10, 11), wherein each door closer has an operating shaft (12, 13) and the operating shaft (12) for the movable leaf (1) carries a stop cam (20) which, with a spring-loaded (26, 27) catch lever (23), forms a device (24) for stopping the partially-open movable leaf (1) enabling the closure sequence to be performed correctly, and which is linked, by means of a traction element (37), to a release lever (35) which, with a release element on the fixed-leaf side, forms a device for releasing the catch lever (23), the catch lever (23) taking up its inoperative position when the fixed leaf (2) is approximately in the closure position, characterised in that the release element is a release cam (82) connected to the operating shaft (13) of the fixed leaf (2) and the catch lever (23) takes up its inoperative position against the resistance of at least one loading spring (26, 27), and in that the operating shaft (12, 13) of each door closer (10, 11) is fixed for pivoting with the associated door.
2. Device according to Claim 1, characterized in that the traction element (37) is adjustable longitudinally and is constituted by a Bowden cable (39) or the like disposed in the region between the two door closers (10, 11).
3. Device according to Claim 2, characterised in that each end of the Bowden cable (39) extends into the respective housing or a respective built-in box of the associated door closer (10, 11) or into an attached housing (51, 52) or the like for the device, and is connected releasably to a respective sliding member (47, 49) movable longitudinally in the housing or the like.
4. Device according to Claim 2 or Claim 3, characterized in that the sliding member (49) on the fixed-leaf side is connected, by means of a longitudinal adjustment device (73), particularly a turnbuckle (76) with a right-hand and a left-hand thread, to a sliding element (72) which is movable longitudinally in the housing (52).
5. Device according to at least one of the preceding claims, characterized in that the catch lever (23) is constituted by a pivotable lever which has a stop notch (21) and is spring-loaded towards the operating shaft (12) on the movable-leaf side, the stop cam (20) abutting this stop notch (21) when the stop device (24) is in the operating position and moving past it when the fixed leaf (2) is closed.
6. Device according to at least one of the preceding claims, characterized in that the stop cam (20) is disposed on a locking ring (16) which is fixed for rotation with the operating shaft (12) on the movable-leaf side and projects, preferably radially, therefrom.
7. Device according to Claim 6, characterised in that the catch lever (23) is constituted by a lever with a single arm and the stop notch (21) is disposed between the pivoting axis (22) of the lever and a point (71) at which the traction element (37) is articulated, in particular, the stop notch (21) and a thrust member (25), which is acted on by the force of the springs, being disposed approximately opposite each other on the catch lever (23).
8. Device according to Claim 7, characterized in that the force of the springs (26, 27) can be altered by means of an adjustment device (30, 31).
9. Device according to at least one of Claims 3 to 8, characterized in that force-transmission elements (70, 60, 64) are inserted between the catch lever (23) and the sliding member (47) on the movable-leaf side and are constituted, in particular, by a rod (70) which is mounted pivotably on the catch lever (23) and is articulated on the first lever arm (61) of a first articulated lever (60), of which the second lever arm (62) is mounted on the housing (51) of the device, and on the common pivoting axis (63) of which the first lever arm (65) of a second articulated lever (64) is articulated, the second lever arm (66) of the second articulated lever (64) also being mounted on the housing (51) of the device, the free end (58) of the first sliding member (47) on the movable-leaf side being coupled to the common pivoting axis (59) of the second articulated lever (64) and, moreover, the lever arms of the first articulated lever (60) extending approximately in the direction of movement of the first sliding member (47) and those of the second articulated lever (64) extending approximately perpendicular thereto.
10. Device according to at least one of the preceding claims, characterised in that the release cam (82) is disposed on a release ring (17) connected for pivoting with the operating shaft (13) on the fixed-leaf side and projects, preferably radially, therefrom.
11. Device according to at least one of Claims 6 to 10, characterized in that the locking ring (16) and the release ring (17) are connected for pivoting with their associated operating shafts (12, and 13) by means of splines.
12. Device according to Claim 11, characterized in that the locking ring (16) and the release ring (17) are split radially and are formed by respective clamping rings with clamping screws (18, 19).
13. Device according to at least one of Claims 4 to 12, characterized in that the release lever (35) is constituted by a two-armed lever of which one lever arm carries the release cam (82) and the other lever arm is articulated (38) on a link (81) which extends transverse the longitudinal axis of the arm and the other end of which is articulated (80) on the sliding element (72).
14. Device according to at least one of the preceding claims, characterised in that all the elements of the locking mechanism on the one hand and of the release mechanism on the other hand are disposed between two plates (53 and 54) of their respective device housings (51 and 52), which can be fixed to the associated door closers (10, 11), the plates (53 and 54) preferably being identical.
15. Device according to Claim 14, characterised in that each device housing (51 or 52) is supported on the associated door closer (10 or 11) by means of a three-point fixing wherein, in particular, in order to form a first fixing point, an open-edged recess in one narrow side of each device housing is engaged and located so that it cannot lift out, in a notch (89) in the associated locking ring (16) or release ring (17), whilst two fixing screws (88) spaced therefrom extend through respective fixing holes in the device housing (51, 52) and are screwed into the door closer (10, 11).
16. Device according to Claim 14 or Claim 15, characterized in that the housing (51, 52) of the locking mechanism on the one hand, and of the release mechanism on the other hand, is disposed in a respective built-in box (14, 15) of the associated door closer (10, 11), between the latter and the cover of the box.

Images