EP2960418B1 - Device for preventing the leaves of a double-leafed swing door from getting stuck against each other - Google Patents

Description

The invention relates to a device for avoiding jamming of the door leaves of a double-leaf swing door to each other with simultaneous opening movement of the door leaves, one door leaf being a so-called passive leaf and the second door leaf being an overlaying so-called active leaf.

The known underlying functional principle, for which an improved solution is proposed by the invention, is that by releasing a drive bolt arranged on the passive leaf from the locked position, a lever mounted pivotably on the passive leaf is pivoted and the active leaf is thereby slightly opened Pivot position is moved.

The invention is particularly advantageous when door leaves are used with a relatively large thickness, in which, in the closed state, the facing end faces are in close contact with one another; this is typically the case with fire doors. When the door leaves are closed, at least partial areas of said end faces are located on that side of the plane defined by the pivot axes of both door leaves, which is at the rear during the opening movement of the door leaves. These areas of the end faces of the door leaves move towards the other door leaves at the beginning of the opening movement of the door leaves. If the gap between the front surfaces of the door leaves is so narrow that the door leaves can just be opened or closed individually, the door leaves can jam and thus block the opening movement if an attempt is made to both door leaves at the same time to open. The problem is most pronounced when the hinge axes lie clearly in front of areas of the door leaf in the opening direction and when door leaves with a small width and a large thickness are used.

For the purposes of this description, the term "drive bolt" of a door leaf is understood to mean a longitudinally displaceable pin, which is vertically aligned and vertically displaceable close to the edge of the door leaf facing away from the pivot axis on the door leaf, and when the door leaf is closed with an end region over the upper or the lower edge of the door leaf can be pushed out and with this end region protrudes into a recess on the door frame, so that the door leaf is blocked against pivoting movement relative to the door frame.

the DE 198 55 402 c1 shows a double-leaf swing door which has an active leaf and an inactive leaf, the inactive leaf can be fixed in the closed state with a vertically displaceable drive bolt and a so-called driver flap is pivotably attached to the inactive leaf. The driving flap has the effect that if the passive leaf is opened when the leaves are closed, the active leaf is also forced to open because the driving flap protrudes against a surface of the active leaf that is at the rear during its opening movement and therefore pushes the active leaf into the opening movement. The driver flap can be pivoted relative to the passive leaf around a vertical axis in the direction of rotation of the opening movement of the passive leaf out of parallelism to the plane of the passive leaf so that when the passive leaf is closed while the active leaf is still open, it can slide on it and does not block the closing movement of the passive leaf. When the passive leaf is closed and locked, the drive bolt penetrates a lever arm of the driver flap. Unlocking the drive bolt removes a blockage of the pivoting flap relative to the inactive leaf, but does not drive pivoting.

the DE 77 31 657 U1 shows an example of a double-leaf fire protection door in which the passive leaf is equipped with a drive bolt. The espagnolette is pushed into the extended position by a spring. In the one for opening the passive leaf and the retracted position required for pivoting the passive leaf into the closed position, the drive bolt is held when the passive leaf is open by a mechanism furthermore referred to as a "switch lock". The key switch unlocks automatically as soon as a protruding part hits the upper frame when the inactive leaf closes. When the switch lock is unlocked, the shoot bolt is released so that it can slide into the extended position. In addition to the DE 77 31 657 U1 shown embodiment for a switch lock, many other embodiments are available on the market. In particular, embodiments have prevailed in which the said protruding part is arranged coaxially with the drive bolt.

To open a pivotable door leaf, the drive bolt is usually moved into the retracted position by a handle on the door leaf. In the most common case, the drive bolt is connected to the handle - or to a part moved by the handle - via a rod. the EP 288 454 B1 and the DE 44 05 625 C2 show pivoting door leaves with drive bolts, with a rope being used as a connection between the drive bolt and the handle instead of said rod.

the EP 2 402 537 A2 shows a double-leaf swing door consisting of an inactive leaf and an active leaf, in which the inactive leaf has a drive bolt. The door is equipped both with a device for preventing the door leaves from jamming when the door leaves are opened at the same time, as well as with a device for regulating the opening sequence. The device for avoiding jamming has two pivotably mounted levers which are arranged on the upper face of the inactive leaf and pivoted as a result of the fact that during the first part of the opening movement of the inactive leaf one of the two levers hits a part that is fixedly anchored to the frame whereby that of the two levers that protrudes into the area of the active leaf, pushes the active leaf into a very rapid opening movement. The device for regulating the opening sequence has a hook which is held on the upper side of the active leaf so as to be linearly displaceable and which engages with a lever on the inactive leaf. When the passive leaf is opened, the hook moves the active leaf in an opening movement, the movable hook being pulled out over the end face of the active leaf facing away from the axis of rotation until the hooking with the lever on the inactive leaf disengages. The active leaf is then opened so wide that it can be held in such a wide open position by a closing sequence control that the passive leaf can be closed without colliding with the active leaf - before the active leaf can also be closed. Neither of the two devices described interacts with the espagnolette.

the AT 510 598 B1 shows a device for avoiding jamming of the door leaves of a double-leaf swing door to one another with a simultaneous opening movement of the door leaves. The passive leaf is equipped with a drive bolt. A lever is held on the drive bolt so as to be pivotable about the axis of the drive bolt. The lever protrudes up to the active leaf on a surface that is at the rear when the active leaf is opened. Pivoting movement of the lever in the direction of rotation of the opening movement of the inactive leaf is driven by vertical displacement of the drive bolt, as is mandatory for unlocking the inactive leaf with respect to the door frame. For example, this drive takes place in that the driving bolt and lever in the form of a screw thread-nut thread engagement with a very large thread pitch abut one another. Due to the linear movement of the drive bolt when unlocking the passive leaf, the lever is pivoted in such a way that it already pushes the active leaf into an opening movement while the passive leaf is only unlocked. In an advantageous version, the pivotable lever is sufficiently long designed to move the active leaf when opening the passive leaf up to the opening angle required for the closing sequence control. In order to enable the lever to slide on the active leaf that is kept open when the passive leaf is closed, the lever can be pivoted in the direction of rotation of the opening movement - under tension of an elastic spring - of the inactive leaf relative to the inactive leaf than is forced by the position of the drive bolt.

Despite the innovative approach, the construction method has not caught on. A significant difficulty is that the position of the drive bolt - which is specified by standardization - is unfavorable on the passive leaf. In conjunction with a rebate on the inactive leaf, the pivoting angle of the lever is too limited for good functionality; this is particularly true for the function of the opening sequence control.

The object on which the invention is based is to provide the passive leaf of a double-leaf swing door with a device by means of which the active leaf is swiveled into a slightly open position just by unlocking the passive leaf, so that the inactive leaf and active leaf cannot jam during the opening movement. Compared to the AT 510 598 B1 known device, the new device should be better to the effect that it works better and in particular can also be used without problems for regulating the opening sequence.

For solving the task is of a construction according to AT 510 598 B1 assumed, according to which a pivotable lever on the passive leaf about a vertical axis is used, which protrudes on the active leaf on a surface lying at the rear during the opening movement of the active leaf, and which relative to the inactive leaf by the displacement movement taking place to unlock the inactive leaf a drive bolt can be driven to pivot movement in the direction of rotation of the opening movement of the inactive leaf.

As an improvement according to the invention, it is proposed that the pivot axis of the lever not coincide with the axis of the drive bolt, but to arrange the pivot axis of the lever offset relative to the drive bolt and that is offset towards the end face of the passive leaf on the active leaf side.

As a result of this measure, those space problems which impaired the pivotability of the lever in the previously known construction can be easily avoided. In addition, there are also additional advantages - which are explained in more detail below.

Fig. 1:

zeigt eine erfindungsgemäß ausgestattete zweiflügelige Schwenktür in geschlossenem Zustand von oben. Durch gekrümmte Pfeile ist angedeutet in welche Schwenkrichtung die Türflügel zu öffnen sind.

Fig. 2:

zeigt den Berührungsbereich der beiden Türflügel der Tür von Fig. 1 in geschlossenem Zustand in Ansicht von oben in gegenüber Fig. 1 vergrößertem Maßstab.

Fig. 3:

zeigt den Bereich von Fig. 2 in Ansicht von oben, wobei der Standflügel noch geschlossen ist, aber die Handhabe des Standflügels gedrückt ist.

Fig. 4:

zeigt den Bereich von Fig. 2 und Fig. 3 in Ansicht von oben, während der Standflügel in Öffnungsrichtung geschwenkt wird.

Fig. 5:

bzeigt den Bereich von Fig. 2 bis Fig. 4 in Ansicht von oben, während der Standflügel etwas weiter als in Fig. 4 in Öffnungsrichtung geschwenkt wird.

Fig. 6:

zeigt die Schwenktür von Fig. 1 bis Fig. 5 in gleicher Ansicht wie in Fig. 1 in dem Zustand, bei dem beide Türflügel vollständig geöffnet sind. In punktierten Linien ist die Lage der oberen Zarge angedeutet.

Fig. 7:

zeigt mit Blickrichtung in Öffnungsrichtung des Standflügels einzelne Details der schon in der Ausführung von Fig. 1 bis 6 verwendeten beispielhaften erfindungsgemäßen Vorrichtung. Der Standflügel selbst ist dabei aus Gründen der Anschaulichkeit nicht dargestellt.

Fig. 8:

zeigt bei gleicher Blickrichtung wie Fig. 7 einen Teilbereich der Vorrichtung von Fig. 7 in Teilschnittansicht.

Fig. 9:

zeigt in seitlicher Teilschnittansicht stark stilisiert jene Teile eines speziellen Treibriegelschlosses, welche Verständnis einer speziellen Ausführungsvariante der Erfindung wesentlich sind. Die Blickrichtung ist dabei normal zur Ebene des Standflügels an welchem das Treibriegelschloss angeordnet ist.

The invention is explained using somewhat stylized drawings. The drawings show an exemplary embodiment of a device according to the invention on a double-leaf swing door equipped therewith.

Fig. 1:

shows a double-leaf swing door equipped according to the invention in the closed state from above. Curved arrows indicate in which pivoting direction the door leaves are to be opened.

Fig. 2:

shows the contact area between the two door leaves of the door Fig. 1 in the closed state in view from above in opposite Fig. 1 enlarged scale.

Fig. 3:

shows the range from Fig. 2 in view from above, with the passive leaf still closed, but the handle of the passive leaf is pressed.

Fig. 4:

shows the range from Fig. 2 and Fig. 3 in view from above, while the passive leaf is swiveled in the opening direction.

Fig. 5:

b shows the range of FIGS. 2 to 4 in top view, while the passive leaf is a little further than in Fig. 4 is pivoted in the opening direction.

Fig. 6:

shows the swing door of FIGS. 1 to 5 in the same view as in Fig. 1 in the state in which both door leaves are fully open. The position of the upper frame is indicated in dotted lines.

Fig. 7:

shows, looking in the direction of opening of the passive leaf, individual details of the already implemented in Figures 1 to 6 used exemplary device according to the invention. The inactive leaf itself is not shown for reasons of clarity.

Fig. 8:

shows when looking in the same direction as Fig. 7 a portion of the device of Fig. 7 in partial sectional view.

Fig. 9:

shows in a side partial sectional view, strongly stylized, those parts of a special shoot bolt lock which are essential to an understanding of a special embodiment variant of the invention. The viewing direction is normal to the plane of the inactive leaf on which the espagnolette lock is arranged.

As in Fig. 1 As can be seen, the pivoting door equipped by way of example according to the invention has an inactive leaf 1 which can be pivoted about a vertical pivot axis 2, as well as an active leaf 3 which is pivotable about a vertical pivot axis 4.

Essential processes that take place when the door is opened by the drive of the passive leaf 1 are illustrated with the aid of the drawings FIGS. 2 to 5 understandable.

In the corner area of the upper face of the passive leaf 1 with the face of the passive leaf 1 facing the active leaf 3, a housing 5 is used, which is the essential parts of the device according to the invention carries. The parts and their functions are presented using the procedure described below.

Fig. 2 shows the relevant part of the door leaves when they are in the closed, locked state. The drive bolt 6 of the inactive leaf 1 is extended and therefore protrudes with its upper end into a hole in the upper door frame, so that the inactive leaf 1 is thus held against pivoting. Via a (usual) mechanism in the lock case of the passive leaf 1, the handle 7 of the passive leaf 1 interacts with the drive bolt 6 in such a way that when the handle 7 is pressed down, the drive bolt 6 is moved downwards in its guide on the inactive leaf 1 will.

A lever 8 is rigidly connected to a vertically aligned shaft 9 which is held pivotably on the housing 5. The shaft 9 is closer to the end face of the passive leaf 1 facing the active leaf 3 than the drive bolt 6. The lever 8 is aligned horizontally and approximately parallel to the plane of the two door leaves 1, 3. With its free end region, it protrudes from the driver hook 10 held on the active leaf 3 and rests against it on such a surface which, when the active leaf 3 is opened, represents a surface located at the rear. A transmission mechanism acts between the drive bolt 6 and the shaft 9 that when the drive bolt is moved downward from its extended position, i.e. retracted, the shaft 9 and with it the lever 8 is forcibly pivoted in the direction of rotation in which the inactive leaf 1 can be swiveled to open. A possible embodiment of this translation mechanism is shown below with reference to Fig. 7 described.

Fig. 3 shows the state when the handle 7 of the inactive leaf 1 is pressed downwards, that is to say something for the purpose of opening the inactive leaf 1 is pivoted from its rest position, but the inactive leaf 1 itself has not yet been pivoted into an opening movement. By pressing the handle 7, the drive bolt 6 was retracted, that is, moved downwards. By moving the drive bolt 6 downward, the shaft 9 and with it the lever 8 was pivoted in the direction of rotation in which the inactive leaf 1 can also be opened due to said transmission mechanism. Since the free end of the lever 8 rests against a surface of the active leaf 3 that is at the rear during its opening movement - to be more precise, on the driver hook 10 held on the active leaf 3 - pivoting the lever 8 pushes the active leaf 3 into a small opening movement before the inactive leaf 1 was swiveled into an opening movement at all. This opening of the active leaf 3 ahead of the passive leaf 1 reliably prevents the inactive leaf 1 and active leaf 3 from colliding with one another and jamming.

In Fig. 4 the passive leaf 1 is also already pivoted into an opening movement. The lever 8 still rests on the driver hook 10, which is held on the active leaf 3 such that it can be displaced radially to its pivot axis. By the adjacent lever 8, the driver hook 10 has been moved radially outward from its rest position from the axis of the active leaf 3, whereby a return spring that "seeks" to move the driver hook 10 towards the axis of the active leaf 3 is tensioned. As the lever 8 rests against the driver hook 10, which is radially displaceable on the active leaf, the active leaf 3 is swiveled with the opening movement of the passive leaf 1 much further in its own opening movement than if the lever 8 were simply in contact with a rebate of the active leaf 3. As intended, the active leaf 3 is opened so far that it reaches at least the minimum opening angle at which it is stopped during the closing movement by a closing sequence control until the inactive leaf 1 is so far ahead in its closing movement, that the correct closing sequence of the two door leaves is guaranteed. (In order for the double-leaf door to close properly, the passive leaf 1 must be closed before the active leaf 3.)

Fig. 5 shows the state when the inactive leaf 1 has been opened so far that the lever 8 and the driver hook 10 have slipped from one another. The driving hook 10 has been pulled back into its end position on the active leaf 3 by a return spring and no longer protrudes beyond the end face of the active leaf 3 facing away from the pivot axis of the active leaf.

In the advantageous embodiment shown here, after being released from the driver hook 10, the lever 8 is rotated further in the direction of rotation of the opening movement of the inactive leaf 1 by the action of an elastic spring until it is at least approximately normal to the plane of the inactive leaf 1 and no longer (or hardly any more ) protrudes beyond the vertical end face of the inactive leaf 1 facing away from the pivot axis of the passive leaf 1. With a longitudinal area spaced apart from its pivot axis, the lever 8 can bear against the vertical end face of the fold 11, which protrudes upwards from the upper end face of the inactive leaf 1. By the axis 9, which is the pivot axis of the lever 8 is, does not coincide with the axis of the drive bolt 6 (as in the construction according to the AT 510 598 B1 represented prior art), but is shifted towards the vertical end face of the stationary leaf 1 facing away from the pivot axis of the stationary leaf 1, this wide pivoting of the lever 8 is possible without a premature collision with the rebate 11 .

• Bei der Schließbewegung des Standflügels 1 wird der Gangflügel 3 durch die Schließfolgeregelung automatisch in einer geöffneten Wartestellung gehalten bis der Standflügel 1 ganz oder fast ganz geschlossen ist. Während der Gangflügel 3 in der Wartestellung ruht, bewegt sich durch die Schließbewegung des Standflügels 1 die Stirnseite des Standflügels 1 nahe an der Stirnseite des Gangflügels 3 vorbei. Da der Hebel 8 nicht zum Gangflügel 3 hin vorsteht, kann er dabei nicht mit dem Gangflügel 3 kollidieren. Die Wartestellung des Gangflügels 3 kann somit bei einem relativ kleinen Öffnungswinkel eingestellt sein und am Gangflügel 3 braucht dennoch kein Berührungsbereich vorgesehen sein, an welchen der Hebel 8 anschlagen und abgleiten kann.
• Wenn der Standflügel 1 beim Öffnen in eine Mauernische einschwenken soll - wie in Fig. 6 skizziert - so kann diese Mauernische von der Schwenkachse des Standflügels 1 weg deutlich kürzer ausgebildet sein, als sie es sein müsste, wenn der Hebel 8 über die von der Schwenkachse des Standflügels 1 .abgewandt liegende Stirnfläche des Standflügels 1 vorstehen würde.

That the lever 8 opposite the passive leaf 1 in the in Fig. 5 position shown can be pivoted, in which it is no longer facing away from the pivot axis of the inactive leaf 1 The horizontal end face of the passive leaf 1 has two main advantages:

• During the closing movement of the passive leaf 1, the active leaf 3 is automatically held in an open waiting position by the closing sequence control until the passive leaf 1 is completely or almost completely closed. While the active leaf 3 is resting in the waiting position, the closing movement of the passive leaf 1 causes the end face of the passive leaf 1 to pass close to the end face of the active leaf 3. Since the lever 8 does not protrude towards the active leaf 3, it cannot collide with the active leaf 3 in the process. The waiting position of the active leaf 3 can thus be set at a relatively small opening angle and, nevertheless, no contact area needs to be provided on the active leaf 3, against which the lever 8 can strike and slide.
• If the passive leaf 1 is to swivel into a wall niche when it is opened - as in Fig. 6 Sketched - this wall niche can be made significantly shorter away from the pivot axis of the inactive leaf 1 than it would have to be if the lever 8 would protrude beyond the end face of the inactive leaf 1 facing away from the pivot axis of the inactive leaf 1.

Fig. 7 shows exemplary details of the device according to the invention discussed so far with reference to the drawings. The contour of the upper end face of the inactive leaf and the vertical end face of the inactive leaf facing away from the pivot axis of the inactive leaf are indicated by dotted lines.

The housing 5 is arranged in the corner area of said end faces of the passive leaf 1. It is penetrated by a threaded rod 12 in the vertical direction. The drive bolt 6 is screwed onto the upper end of the threaded rod 12 and is designed as a cylindrical, downwardly open sleeve with a nut thread. For reasons of assembly, the drive bolt 6 should have an opening 13 ( Fig. 8 ) for the engagement of a screwdriver, for example with a recess Hexagonal cross-sectional shape have. The lower end of the threaded rod 12 is connected to the mechanism of the handle 7 of the inactive leaf 1. When the handle 7 is pressed, the threaded rod 12 and with it the drive bar 6 is pulled down a little.

The drive bolt 6 is surrounded by a switch lock 14, of which in Fig. 7 only the housing 16 and the trap 17 are visible. The housing 16 of the switch lock 14 is itself enclosed by the housing 5.

The function of the switch lock 14, of which the latch 17 is a part, is the following, which is known per se from the prior art:
When the inactive leaf is closed and locked, the spring 15 acting as a compression spring presses the housing 16 of the switch lock 14 from the inside against the uppermost surface of the outer housing 5 thus also pressed into an upper end position by the spring 15. The drive bolt 6 protrudes into a recess on the upper frame of the door.

By actuating the handle 7 of the inactive leaf 1, the threaded rod 12 is pulled somewhat downwards relative to the inactive leaf 1 and thus also relative to the housing 5 rigidly attached to the inactive leaf. This also pulls the drive bolt 6 and the housing 16 down a little. The upper end of the drive bolt 6 slides out of the recess on the upper frame of the door and the inactive leaf 1 can be pivoted in the opening direction.

The latch 17 protrudes upward from the housing 16 of the switch lock 14. It is vertically displaceable with respect to the housing 16 and, in the absence of other forces, is pressed into an upper end position by a spring arranged in the housing 16. When the passive leaf 1 is closed, the latch 17 of the switch lock is located 14 with its uppermost surface on the upper door frame from below. When the inactive leaf 1 is opened, the latch 17 slides out from under the frame and, as soon as it is no longer in contact with the frame, is shifted to its upper end position by said spring. As a result of this upward displacement, a clamping mechanism between a support part, which rests on the upper surface of the housing 5 from below, and the drive bolt 6 becomes effective in the switch lock 14. The clamping mechanism has the effect that the drive bolt 6 can no longer be moved upwards relative to the support part as long as the latch 17 is in the upwardly extended position. Since the driving bolt is in the lowered position with respect to the locked position when the clamping mechanism is active, the threaded rod 12 and the housing 16 are also in the lowered position.

The top surface of the trap 17 is an inclined plane. When the passive leaf 1 is closed, this inclined plane reaches the upper frame part of the door frame. When the inactive leaf 1 is closed, the inclined plane slides on the upper frame and the latch 17 is pressed down into the housing 16 of the switching mechanism 14. As a result, the aforementioned clamping mechanism is released and the housing 16 and with it the drive bolt 6 and the threaded rod 12 are raised by the action of the spring 15, so that the upper end of the drive bolt 6 can slide back into the recess on the upper frame part and thus the inactive leaf 1 locked again in the closed position.

It is essential according to the invention that the shaft 9 to which the lever 8 is attached does not run coaxially with the drive bolt 6, but at a distance from it. For this purpose, the shaft 9 is rotatably supported on the housing 5 at a distance from the driving bolt 6. However, it is encompassed by arms 18, 19 projecting away from the housing 16 - which are rigidly connected to the rest of the housing 16. As already mentioned above, the offset arrangement with respect to the espagnolette the pivot axis of the lever 8 has the advantage that the lever 8 can perform a larger pivoting movement without space problems.

In the advantageous embodiment shown, the pivoting movement of the shaft 9 and thus of the lever 8 is brought about in sections by one of the three following drive mechanisms.

Drive mechanism a:

From the closed position of passive leaf 1 and active leaf 3 and from the locked position of drive bolt 6 ( Fig. 2 ) are moved by means of the handle 7 of the inactive leaf 1, the threaded rod 12 and through this the drive bolt 6 and the housing 16 relative to the housing 5 downwards.

The upper arm 18 of the housing comprises a sleeve 20, which in turn comprises the shaft 9 without clamping the shaft 9. The sleeve 20 has a projection on its outer circumferential surface which has the shape of a very steep screw thread 21. At its opening encompassing the sleeve 20, the arm 18 has a complementary nut thread 22 corresponding to the screw thread 21. The sleeve 20 is fixed on the shaft 9 against axial displacement. Due to the threaded connection between arm 18 and sleeve 20, the sleeve 20 is rotated somewhat when the housing 16 is lowered. Via a stop surface acting in the circumferential direction of the shaft 9, this rotary movement is transmitted from the sleeve 20 to a further sleeve 23, which is rigidly connected to the shaft 9, so that the shaft 9 is also rotated. This rotation of the shaft 9 takes place in the same direction of rotation that the passive leaf 1 has when it is in the opening movement; it causes that pivoting movement of the lever 8 rigidly connected to the shaft 9, through which the active leaf 3 is already forced into an opening movement when the handle of the passive leaf 1 is operated ( Fig. 3 ).

Drive mechanism b:

A torsion spring 24 is clamped between the sleeves 20 and 23. It is elastically preloaded in such a way that, in the absence of other forces, it moves the sleeve 23, which is rigidly connected to the shaft 9, relative to the sleeve 20, the position of which is dependent on the position of the housing 16 via the described threaded connection with the arm 18 that direction of rotation rotates in which the passive leaf 1 is rotated when it is in the opening movement. The drive mechanism is effective when the lever 8 and the driver hook 10 have separated from each other when the passive leaf 1 and the active leaf 3 are opened ( Fig. 5 ). By the drive mechanism, the lever 8 is pivoted into that end position in which it is aligned approximately normal to the plane of the inactive leaf. ( Fig. 5 , Fig. 6 ).

Drive mechanism c:

On the lower arm 19 of the housing 16 there is a third sleeve 25 which is rigidly connected to the lower arm 19 and encompasses the shaft 9 without clamping it. The upper end face of the sleeve 25 is designed as a link guide surface 26, that is to say as a surface which continuously changes its height along the circumference of the sleeve 25, at least in some areas. For example, the link guide surface 26 can be a screw thread surface which has the same thread direction as the thread on the arm 18 but with a lower thread pitch. The sleeve 23, which is located above the sleeve 25 rigidly connected to the arm 19 and is rigidly connected to the shaft 9, has a matching height profile on its lower end face.

When the drive bolt 6 is in the lower position, the housing 16 is also in the lower position and the link guide surface 26 is not in contact with the sleeve 23, so that it is ineffective. If, however, after the closing pivoting movement of the inactive leaf 1 by the switch lock 14, upward movement of the housing 16 is released and the housing 16 slides upward, the link guide surface 26 comes into contact with the lower end face of the sleeve 23. The two surfaces slide off one another. In accordance with the principle of diverting bodies on an inclined plane, the sleeve 23 is thus rotated in the direction of rotation that the inactive leaf 1 has when it is closed. With the sleeve 23, the shaft 9 rigidly connected to it, and with it the lever 8 rigidly connected to it, is rotated. The lever 8 thus returns to the starting position relative to the passive leaf 1 when the door leaves 1, 3 are closed.

Fig. 8 goes into more detail on the structure of the drive bolt 6 and its interaction with the housing 16 of the switch lock 14.

The driving bolt 6 shown has essentially the shape of a circular cylinder jacket-shaped sleeve which has a nut thread on its inner jacket surface side. The threaded rod 12 is screwed so far into this nut thread from below that it is at the appropriate height. By varying the screw-in depth of the threaded rod 12 in the drive bolt 6, there is thus an adjustment option. On the upper end face, the driving bolt 6 has an opening 13 which is wider than the diameter of the internal thread and is designed, for example, as a hexagon socket opening in order to enable the engagement of a hexagon screwdriver. From the opening 13, a threaded pin 27, which can also have a hexagon socket opening on its upper side, is screwed into the nut thread of the driving bolt 6 up to the upper end face of the threaded rod 12. By tightening the threaded pin 27 so that if it presses firmly against the face of the threaded rod 12, it represents a safeguard against loosening of the screw connection between the threaded rod 12 and the driving bolt 6, based on the principle of a lock nut.

The lower end face of the drive bolt 6 rests against a so-called freewheel disk 28, which is displaceable in the circular cylindrical interior of the housing 16 between two axially spaced apart locking rings 29, 30 anchored on the housing 16. The spring 15 presses against the underside of the freewheel disk 28.

If the drive bolt 6 is lowered by operating the handle 7 of the inactive leaf 1, only the free-wheeling disk is moved downwards during the first part of the movement of the drive bolt 6 and the housing 16 still remains stationary. Only after the freewheel disk 28 has come to rest on the lower locking ring 30 in the further course of the movement of the drive bolt 6, the housing 16 is also moved downwards with the downward movement of the drive bolt 6 and the lever 8 is inevitably pivoted as described above.

The translation of the unlocking movement of the drive bolt 6, that is, the movement of the drive bolt 6 away from the frame into a pivoting movement of the lever 8, thus has a freewheel at the beginning of the movement of the drive bolt 6. This makes it easy to achieve that when the handle 7 is actuated, the direct locking of the active leaf 3 to the inactive leaf 1 is only released before the lever 8, by which the active leaf 3 is driven for the pivoting movement to be opened, is set in motion. Instead of providing the said freewheel between the drive bolt and the housing 16, it can also be provided, for example, directly between the arm 18 (which is rigidly connected to the housing 16 part) and the lever 8, in that the screw thread 21 has a variable pitch, namely in the uppermost part infinite slope.

to Fig. 9 :
As mentioned in the penultimate paragraph, when the handle 7 is operated to open the passive leaf 1, the locking of the active leaf 3 must first be released so that the pivoting movement to be opened is free before the lever 8 ( Fig. 3 , Fig. 7 ) is set in rotation with respect to the passive leaf 1, since the lever 8 drives the opening pivoting movement of the active leaf 3. According to the construction of Fig. 7 and Fig. 8 For this purpose, a freewheel in the translation of the downward movement of the drive bolt 6 to the pivoting movement of the lever 8 is realized by the mode of operation of the switch lock 14.

As with Fig. 9 Illustrated as an example and in a highly stylized way, the same goal can also be achieved by a free-wheeling in the translation already in the shoot bolt lock - that is, that fitting assembly that translates the movement of a handle into the vertical movement of that of the threaded rod 12 that pulls in the shoot bolt 6 the movement of the handle in the movement of the threaded rod 12 is provided.

The espagnolette lock 31 is inserted into the inactive leaf 1 on the end face of the inactive leaf 1 facing the active leaf. It has a locking plate 32 which is arranged flush with the end face facing the active leaf. The strike plate 32 has two openings 33 through which a latch or a bolt protrude from the active leaf when the door leaves are closed and locked, so that the active leaf is fixed against pivoting movement about its pivot axis.

The espagnolette lock 31 also has a shaft 34 which is connected to the handle 7 (e.g. Fig. 2 ) is connected in such a way that the shaft 34 is also pivoted by the pivoting movement of the handle 7. Using the example according to Fig. 9 causes actuation of the handle 7 for the purpose of opening the passive leaf 1 rotation of the shaft 34 clockwise. This rotary movement of the shaft 34 is translated on the one hand into a pivoting movement of two levers 35, which thereby from the from Inside the housing of the espagnolette lock are moved towards the openings 33 in the strike plate 32 and push the latch and bolt of the active leaf out of these openings 33, so that the active leaf is thus unlocked.

On the other hand, the rotary movement of the shaft 34 is translated into a vertically downward movement of a slide 36. During this movement, the slide takes the lower end part 37 of the threaded rod 12 down with it, which subsequently pivots the lever 8 - which urges the active leaf into an opening movement - and ultimately also releases the locking of the passive leaf 1 on the frame.

Said freewheeling is achieved in that the slide 36 does not immediately drive the lower end part 37 into a downward movement when the shaft 34 is rotated, but only after it has come to rest against a stop surface of the end part 37. When the handle of the inactive leaf is not actuated, the slide 36 does not lie against said stop surface, but is located above it by a distance 38, on the extent of which the size of said freewheel depends.

In a particularly preferred embodiment, the insertion depth of the drive bolt 6 ( Fig. 7 , Fig. 8 ) with the passive leaf 1 closed in a hole in the door frame so that the drive bolt 6 has only fully slid out of this hole when not only the latch and bolt of the active leaf are pushed out of the openings 33, but also when the lever 8 has already been pushed is pivoted a little so that he has already pivoted the active leaf 3 into an opening movement that hurries ahead of the inactive leaf 1.

1. 1. Der Gangflügel 2 wird entriegelt, indem aus dem Treibriegelschloss 31 die eingreifenden Teile -Falle und Riegel- hinausgeschoben werden. Zugleich wird eventuell auch schon die Treibriegelstangen etwas eingezogen aber aus der Zarge oben noch nicht ganz entriegelt.
2. 2. Der Gangflügel 2 wird nach vor geschwenkt, indem der Hebel 8 am Schaltschloss 14 gedreht wird.
3. 3. Der Standflügel wird aus der Zarge ganz entriegelt.

The ideal sequence when opening both door leaves as a result of opening inactive leaf 1 is:

1. 1. The active leaf 2 is unlocked by the engaging parts - latch and bolt - being pushed out of the espagnolette lock 31. At the same time, the espagnolette rods may also be used slightly drawn in but not yet fully unlocked from the top frame.
2. 2. The active leaf 2 is pivoted forwards by turning the lever 8 on the switch lock 14.
3. 3. The passive leaf is completely unlocked from the frame.

Possible generalizations to the embodiments discussed should also be mentioned:
The threads 21 and 22 described for the above drive mechanism a are to be seen as a special case of a more general transmission mechanism or drive mechanism in which one part slides on an inclined plane which forms the surface of another part. The same applies to the above transmission or drive mechanism c.

The mechanical translation between the downward or upward movement of the drive bolt 6 and the pivoting of the lever 8 does not necessarily have to take place in that one part slides on an inclined plane which is the surface of another part. As part of the professional work, the mechanical translation can be implemented so easily by a variety of other measures that it does not need to be discussed in more detail here. Merely as examples and suggestions are mentioned: gear transmission, rack-and-pinion transmission, belt or chain transmission, transmission through linkage.

Instead of the threaded rod 12, a rope can also be used as a tension member for the required connection between the drive bolt 6 and the handle 7 of the inactive leaf 1. This can be advantageous in the case of maintenance, because in order to replace the tension member in the case of door leaves that are high relative to the height of the room, the inactive leaf does not have to be folded down separately.

For the function of the opening sequence control - which is a prerequisite for the closing sequence of the two door leaves to be able to function - the outlined construction with a displaceable driver hook 10 on the active leaf 3 is advantageous. In principle, the function can also be fulfilled if the lever 8 rests on the rebate of the active leaf above the face of the active leaf or rests on another part of the active leaf and slides off during the opening movement of both door leaves.

In the previous description, for reasons of clarity, it was assumed that the drive bolt 6 interacts with the upper frame part of the door frame and can therefore be unlocked by a downward movement and locked by an upward movement. Within the concept of the invention, however, it is just as possible to have the drive bolt interact with the lower frame part (ie the bottom part of the frame) and to make it unlockable by an upward movement and lockable by a downward movement. In order to take this generalization into account, instead of the terms "upward or downward movement of the drive bolt", the equivalent terms "locking or unlocking movement of the drive bolt" or "movement of the drive bolt towards the frame towards or away from the frame" are used in the following patent claims.

Claims (14)

1. Device for preventing jamming of the inactive leaf (1) and active leaf (3) of a double-leaf swing door when they are opened simultaneously together, in that the active leaf (3) is pivoted into a slightly open position by unlocking the inactive leaf (1), whereby the inactive leaf (1) is equipped with a drive bolt (6) that can be moved vertically beyond the inactive leaf, with the aid of which the inactive leaf (1) can be anchored to the door frame in the closed position, the inactive leaf (1) having a transmission mechanism which transmits vertical movement of the drive bolt (6) away from the door frame into a pivoting movement of a lever (8) rotatably mounted on the inactive leaf (1) in the direction of rotation of the opening movement of the inactive leaf (1), the lever (8) on the active leaf (3) protruding on a surface at the rear of its opening movement
   characterised in that
   the pivot axis of the lever (8) is offset from the drive bolt (6) to the vertical end face of the inactive leaf (1) on the active leaf side.
2. A device according to claim 1; characterised in that the pivoting movement of the lever (8) can be driven by a movement of a handle (7) attached to the inactive leaf (1), by means of which the active leaf (3) can also be unlocked, and that the mechanical transmission of the movement of the handle (7) into a pivoting movement of the lever (8) at the beginning of the movement of the handle (7), has an area to move freely.
3. Device according to claim 1 or 2, characterised in that part of the mechanical transmission is the housing (16) of a switching lock (14) which serves to hold the drive bolt (6) in the retracted position from the frame when the inactive leaf (1) is open and after closing the inactive leaf (1) to release the movement of the drive bolt (6) towards the frame.
4. Device according to one of claims 1 to 3, characterised in that a part which moves with the movement of the drive bolt (6) when the inactive leaf (1) is unlocked has an inclined plane on which, during this movement, a surface of the lever (8) or a surface of a part in mechanical connection with the lever (8) bears and slides.
5. Device according to claim 4, characterised in that the inclined plane is a portion of a nut thread (22) which engages with a complementary screw thread (21) the thread axis of which coincides with the pivot axis of the lever (8).
6. Device according to one of claims 1 to 5, characterised in that a spring (24) is connected at one end to a part (23) pivoted with the lever (8), whereby the spring (24) is elastically prestressed and the prestressing force exerts a torque on the lever (8), which is aligned in the same direction of rotation as the opening pivoting movement of the inactive leaf (1).
7. Device according to one of claims 1 to 6, characterised in that it has a mechanical transmission that transmits the locking movement of the drive bolt (6) into a pivoting movement of the lever (8) which is oriented in the same direction of rotation as the closing pivoting movement of the inactive leaf (1).
8. Device according to claim 7, characterised in that a part which moves with the locking movement of the drive bolt (6) when the inactive leaf (1) is locked has a slotted guide surface (26) on which a surface of the lever (8) or a part which is mechanically connected to the lever (8) bears and slides during this movement.
9. Device according to claim 7 or 8, characterised in that the mechanical transmission is dimensioned in such a way that it transmits only the last part of the locking movement of the drive bolt (6) into a pivoting movement of the lever (8).
10. Device according to one of claims 1 to 9, characterised in that a spring (15) is prestressed between the inactive leaf (1) and the drive bolt (6) which, in the absence of other forces, displaces the drive bolt (6) relative to the inactive leaf (1) towards the frame, i.e. into a locking movement, and that the drive bolt (6) is connected via a tension member to a handle (7), by actuation of which the drive bolt (6) can be pulled into an unlocking movement.
11. Device according to claim 10, characterised in that the drive bolt (6) is designed as a sleeve with a nut thread and that the tension member is a threaded rod (12) which is screwed into the sleeve.
12. A device according to claim 10, characterised in that the tension member is a rope.
13. Device according to one of claims 1 to 12, characterised in that it is also used to force the active leaf (3) to open when the inactive leaf (1) is opened, to such an extent that the active leaf (3) can reach an open standby position required for the automatic control of the closing sequence of the two door leaves, from which standby position it can only be closed when the inactive leaf (1) is completely or almost completely closed.
14. Device according to claim 13, characterised in that the lever (8) on the active leaf (3) protrudes onto a transport hook (10) which can be displaced on the active leaf (3) radially to its pivot axis, whereby a spring clamped between the active leaf (3) and the transport hook (10) is elastically prestressed in such a way that it produces a force on the transport hook (10) which is directed towards the pivot axis of the active leaf (3).

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