EP2902575A1 - Fitting configuration - Google Patents

Abstract

A fitting arrangement (11) for a window, door or the like with a scissors fitting (13) comprises a scissor arm (15) and a scissor arm (17) pivotally coupled to the scissor arm (15), two parts of the scissors fitting (13) and the scissor bearing (31) comprehensive support structure relative to each other are variably fixed in different positions in order to adjust the effective length of the scissors fitting (13). The two parts are connected to each other via at least one adjustable coupling element (33; 49; 51; 61), which is designed to be adjusted automatically when closing a wing of the window, the door or the like so that a misalignment of the wing by shortening the effective length of the scissors fitting (13) is automatically corrected.

Description

The present invention relates to a fitting arrangement for a window, a door or the like with a scissor fitting comprising a scissor arm and a scissor arm coupled to the scissor arm, wherein the scissors link at a first coupling point with a wing of the window or the door is coupled, and wherein the Scissor arm can be coupled at a second coupling point with a scissor bearing which can be fastened to the window frame or the door, in order to pivotally mount the wing to the window frame.

In such a fitting arrangement, the wing is not simply hinge side about one or more pivot bearings, which are formed approximately in the manner of hinges, pivotally mounted on the frame around the pivot bearing. But it is a scissors fitting provided which couples the wing, in particular at the top, in addition to the frame. Such a scissor arm improves the stability of the mounting of the wing to the frame not only in a pivoting opening of the wing, in particular by supporting the wing against vertically downwardly directed tensile forces acting on the wing due to gravity, but also allows the wing to tilt open , wherein the scissors fitting on the one hand, the extent to which the wing can be tilted limited and on the other hand, the tilted wing on the tilting axis opposite and thus wegkippenden away from the frame side (indirectly) coupled to the frame.

The scissors fitting comprises a scissor arm and a scissors link, which are hinged together to spread in the manner of a scissor mechanism 'can. The scissor arm is generally elongate and is coupled at said second coupling point via a band angle pivotally connected to a scissors bearing provided on the frame. At the other end, the scissor arm is usually coupled to the wing, however not rigid, but guided in a slot or a groove on the wing between different positions. In contrast, the scissor arm is usually coupled at a fixed spaced from the ends of the articulation point with the scissor link, which in turn is coupled at said (fixed) first coupling point with the wing. In this way, the wing side, on which the scissors fitting is arranged, can be tilted away from the frame, since the scissor arm and the scissor arms, which are aligned parallel to each other with the wing closed, can break open during tilting of the wing in this way.

When mounting the sash to the frame, it is important that the effective length of the scissors fitting, i. the distance between the first coupling point at which the scissor arm is coupled to the wing and at which thus the wing is held by the scissors fitting, and that point on the frame on which the scissor arm is coupled via the bank angle with the scissors bearing is adjusted correctly , Because the effective length of the scissor fitting has an influence on the correct orientation of the wing to the frame, in particular to the height of the distant side of the blade with rotatably opened wing.

For example, shortening the effective length of the scissors fitting causes the wing to be raised relative to the frame, while the wing decreases in lengthening the effective length of the bracket relative to the frame. Here, raising and lowering of the wing is to be understood in each case so that the band-distant side of the wing offset when lifting the wing with respect to the band-side side up and is offset when lowering the wing opposite the band-side side down.

If the effective length of a scissors fitting coupling a wing to a frame is set incorrectly, the wing may face the frame be raised or lowered so that at a closing of the open wing, ie when pivoting the wing to the frame out, the wing is not accurately fitted in the frame, but before reaching the closed position with its top or bottom on the appropriate page of the window frame can accumulate and is swung along this grinding in the frame.

But even if the effective length of the scissors fitting is adjusted correctly during assembly of the wing, over time, in particular due to the inherent weight of the wing, parts of the wing may warp or deform parts of the fitting assembly to some extent and / or stretch, so that the Wing in particular drops. Such a sunken wing runs when closing on the frame, rather than swivel smoothly into the frame. This not only leads to abrasion between the sash and the frame, but also to an increased mechanical load on the fitting arrangement. Because experienced during the scissors fitting and especially the associated scissors bearing with correctly set effective length of the scissors fitting always in the same direction aligned forces (essentially exclusively tensile forces), forces are applied in the opposite direction to the fitting arrangement when a sunken wing on the frame. In particular, the resulting alternation between tensile and compressive forces causes high mechanical stress on the fitting assembly and leads to increased wear.

To adjust the effective length of the scissors fitting, two parts of the scissors fitting and the scissor bearing comprehensive support structure relative to each other can be variably fixed in different positions. In this way it may be possible to adjust the effective length of the scissors fitting, such as by shifting, and then fix it by suitable means. For example, a screw and a nut (or other mating thread) be provided by which the two parts are coupled together. In this case, tightening or loosening the screw relative to the nut can cause the parts to move relative to one another. But the screw and the nut can also serve only to set a set by manually moving the parts effective length of the scissors fitting.

Adjusting the effective length of the scissors fitting during assembly or as part of a, for example due to a deformation of the wing required, readjustment is carried out by means of tools, such as a screwdriver or a special tool. In addition, due to the often limited accessibility of the scissors arm and the scissor bearing, the adjustment of the effective length of the scissors fitting must usually be made by a person skilled in the art. In many cases, the readjustment of a lowered grand piano therefore also remains completely out if, for example, laypersons do not realize that a readjustment is required or the costs for the professional implementation are shy. This poses a safety risk, since an incorrectly set effective length of the scissors fitting due to the increased wear can lead to damage to the wing bearing.

It is therefore an object of the invention to provide a fitting arrangement of the type mentioned with reduced wear and improved safety, which allows a simple, in particular automatic, readjustment of the effective length of the scissors fitting.

The object is achieved by a fitting arrangement with the features of claim 1 and in particular by the fact that the two parts are connected to each other via at least one adjustable coupling element, which is designed to be automatically adjusted when closing the wing so that a malposition of the wing is corrected by shortening or lengthening the effective length of the scissors fitting.

In other words, in the fitting arrangement according to the invention the adjustment of the effective length is not manually required - a manual adjustment does not even have to be possible - but takes place automatically when closing the wing. It can be exploited in particular that when the sash is closed by the frame a correct, i. to the frame tailor-made, alignment is enforced. Even if the wing is misaligned in the open state and therefore runs against the frame when it is closed, closing it through the interaction with the frame results in the wing ultimately being forced into the correct orientation. The said coupling element can be adjusted automatically due to this interaction.

Since the coupling element connects the two variably fixable parts together, the effective length of the scissors fitting can be changed in particular by adjusting the coupling element. Advantageously, the coupling element can use the interactions occurring during closing of the wing to adapt the position of the two parts which can be variably fixed to one another. For example, the coupling of the parts caused by the coupling element can first be released by closing the wing and can be restored at the latest when the fully closed position of the wing is reached. In this way, the parts can advantageously be connected to each other again in the relative position, which is predetermined by the closed wing and therefore corresponds to a correct orientation of the wing.

An embodiment according to the invention also has an advantageous effect on the simplicity of mounting the fitting arrangement. For example, the scissors fitting can initially be set to a maximum or at least particularly long effective length during assembly of the fitting arrangement. Of the Wing then does not necessarily have to be mounted in the exact correct orientation, but in particular initially slightly suspended (ie slightly lowered) can be stored on the frame. When closing for the first time, the sash then pops up on the frame and is pushed upwards by it. This shortens the effective length of the scissors fitting due to the embodiment of the invention straight to the correct size, ie, such that the wing is aligned correctly relative to the frame and thus swung accurately at the next closing of the wing in the frame. If, after some time, the wing, for example, due to the effect of gravity should lower again, this independent adjustment is automatically again. Since the degree of misalignment of the sash occurring during assembly or after installation is generally low, the variability of the two parts of the fitting arrangement which can be variably fixed in different positions need not be particularly extensive and may be limited, for example, to positions which are at most differ by a few centimeters.

According to a development, the two variably fixable parts are displaceable relative to each other and coupled to each other via a one-way coupling forming the coupling element, which allows a sliding movement of the parts in one direction and blocked in the other direction. The various relative positions are thus in this embodiment by moving the said parts relative to each other. However, the two parts are not freely displaceable, since they are coupled to one another via a particularly kind of coupling element, namely a one-way clutch. As a result, the two parts can be displaced relative to one another only in one direction (for example towards each other). In the other direction (example, away from each other), however, they are blocked against shifting.

Consequently, the one-way clutch rigidly couples the two parts together in a direction of displacement, but allows at least one movement of the parts relative to one another in the opposite direction, without the parts necessarily being completely decoupled from each other. Rather, the one-way clutch can couple the two parts permanently, so that the parts are displaceable relative to one another in the said one direction, but are not completely detached from one another. In addition, the displaceability of the parts may be limited relative to each other. For example, the one-way clutch, a displacement of the parts towards each other to basically allow. However, the distance by which the parts may be displaced may be limited by the one-way clutch or otherwise (such as by stops on the parts themselves or other elements of the fitting assembly).

In particular, it is preferred if the one-way clutch is designed to enable a shortening of the effective length of the scissor fitting shortening sliding movement of the parts and to block the effective length of the scissor fitting extending sliding movement of the parts. Thus, such misalignments of the wing can be corrected by the one-way clutch just in which the wing relative to the correct position in which a precise pivoting of the wing is possible in the frame, is lowered, as is often the case in particular due to gravity.

According to one embodiment, the one-way clutch is effective between a scissors-bearing-side end region of the scissor arm and a connecting component provided for fastening the scissor arm to the rotary bearing, in particular a carrying strap or a belt angle. Such a support bracket may be substantially formed as an angle which is pivotally mounted with one leg over a band angle on the scissor bearing, while the other leg is coupled by means of the one-way clutch with the scissor arm. Thus, the support bracket in a simple way the storage of an angled, in particular allow vertical, aligned to a pivot axis of the scissors bearing scissor arm. However, the connection component can also be embodied in other ways, as long as it allows the attachment of the scissor arm to the band angle. In this case, neither the scissor arm nor the connecting component nor the band angle must be made in one piece. In particular, between the scissor arm and the belt angle, in addition to the connecting component, further elements can bring about or support the attachment of the scissor arm to the belt angle and thus the coupling to the scissors bearing.

The change in the effective length of the scissors fitting results in such an embodiment, in particular by the scissor arm and the connecting member are displaced relative to each other, whereby the distance of the first coupling point, at which the scissor arm is coupled to the wing, of the by the band angle or the scissor bearing defined pivot axis changed.

According to an alternative embodiment, the one-way clutch is integrated in the band angle or in the scissor bearing. For example, band angle or scissors bearing may be formed in several parts, wherein at least two of these parts are displaceable relative to each other and wherein between these two parts, the one-way clutch acts in the manner mentioned. The relative displaceability can be present, for example, between a fastening section, by means of which the scissors bearing can be screwed approximately to the window frame, and a bearing section of the scissors bearing, which serves for the pivotable mounting of the scissor arm or of a connecting component coupled thereto.

Furthermore, it is preferred if the one-way clutch has a latching device. A latching device provides a simple mechanism to fulfill the function of the one-way clutch, namely a displacement of two By means of the one-way clutch coupled divider relative to each other in one direction to allow and block in the opposite direction.

It is advantageously achieved by the latching device that must be done for the displacement of the two parts in one direction no manual or caused by a further element loosening and then bringing back the coupling of the two parts, but that the mere displacement of the two parts in the a direction causes the loosening and re-coupling. In this case, the locking effected by the latching means in particular stepped, approximately at regular intervals, carried out, so that in each case a displacement by a certain amount (latching step) a correspondingly shortened or extended effective length of the scissors fitting is set. By such a grading can be determined in how fine levels an adjustment of the effective length of the scissor fitting should be possible.

According to a further development, the latching device comprises a toothing formed on one of the displaceable parts and a counter-toothing cooperating therewith and formed on the other part. Such an embodiment is a structurally particularly simple form of locking device and can be manufactured with great precision. Advantageously, the toothing and the counter-toothing cooperate in this case precisely due to their respective design in such a way that they allow the displaceable parts to slide along one another but block in the other direction.

In this case, the toothing may in particular have an asymmetrical tooth form. For just by an asymmetrical tooth shape can be achieved that the interaction of the teeth and the counter teeth, which may also have a, albeit not necessarily equally, asymmetric tooth shape, in which a displacement allows displacement, but blocks it in the other direction of displacement.

In particular, the tooth flanks of the toothing facing toward one side can run obliquely to a longitudinal axis of the scissor arm and the tooth flanks of the toothing pointing towards the opposite side extend at least substantially at right angles to the longitudinal axis. Here, it is to be understood obliquely that the tooth flanks are aligned neither parallel nor perpendicular to the longitudinal axis, but have an average angle of, for example, between 20 ° and 70 °. The tooth flanks of the counter-toothing can be designed accordingly, but just opposite. If in such an embodiment, the teeth and the counter-teeth mesh, are perpendicular to the longitudinal axis aligned tooth flanks of the teeth on perpendicular to the longitudinal axis aligned tooth flanks of the counter teeth and obliquely to the longitudinal axis aligned tooth flanks of the teeth on obliquely to the longitudinal axis aligned tooth flanks of the counter teeth.

According to an advantageous development, the latching device comprises a pawl, which is movable, in particular pivotable, mounted on one of the displaceable parts and engages in preferably formed by a toothing recesses of the other part. In particular, the said counter-toothing may be formed on the pawl, so that the pawl engages with this counter-toothing in the latching recesses of the respective other part. The mobility of the pawl makes it possible that the engagement of the pawl in the recesses is at least temporarily canceled by the pawl moves out of the engaging position out, in particular pivots is.

It is preferred if the pawl is biased by means of a spring element in any displacement movements of the parts blocking blocking position. In this case, any displacement movements of the parts blocking blocking position to understand that the sliding parts can not be moved relative to each other without having to adjust the pawl from its locked position for this purpose. However, it is not excluded that the displacement of the parts itself causes the pawl is moved out of the locked position. In particular, it is advantageous if the pawl and the recesses are formed such that a force exerted on the displaceable parts displacement force in a direction of displacement leads to a displacement of the pawl out of the blocking position, so that the parts can be moved in this direction, while a Displacement force in the other direction of displacement leads to no displacement of the pawl, so that the parts are blocked against displacement in this other direction.

Such a biased pawl can be used to ensure that the one-way clutch, the sliding parts in the direction to be blocked, i. in particular against due to gravity on the wing and the fitting arrangement acting forces reliably coupled. In this case, the pawl can advantageously also be designed so that it can be manually moved against its bias from the locked position to allow, if necessary exceptionally, a sliding of the sliding parts in the otherwise locked direction.

Furthermore, it is advantageous if the pawl is mounted directly on a shear bearing side end portion of the scissor arm. For example, a coupling of the scissor arm to a connecting component or the band angle can be provided at such an end region, so that the pawl can be effective in the context of this coupling. In addition, the pawl does not extend very far away from the frame in this way, even with torsionally open or tilt-open wing, so that it is not exposed and thus can be avoided that it is accidentally actuated releasing.

According to a further embodiment, the pawl is mounted on an underside of the scissor arm facing the sash of the window or door, a recess of the scissor arm enabling at least partial access to the pawl from the top of the scissor arm. In such an embodiment, the pawl is thus arranged substantially concealed and protected so that unintentional release of the coupling of the two displaceable parts is avoided. At the same time, however, access to the pawl is possible, at least from a certain angle which is untypical with usual operation of the wing (from above). Through this access, the pawl thus, if necessary, manually, about without tools or by means of a pin or screwdriver, be solved. This may be necessary, for example, if overcorrection has occurred and the orientation of the sash has been changed beyond the correct position.

In an alternative embodiment, this is one of the two variably fixable in different positions parts of the scissor arm and the other of the scissor arms, the scissor arm and the scissor arm in the longitudinal direction of the closed scissor fitting variable common articulation point on which they are pivotally coupled together. Unlike conventional scissor fittings so in this embodiment, the scissor arm and the scissor arms are not hinged together at a fixed point, but the point at which the scissor arm and the scissor arms are connected to each other is adjustable. In particular, this articulation point can be adjusted in the longitudinal direction of the scissors fitting, i. parallel to the extension of the scissors fitting, when the scissors fitting is closed and thus the scissor arm and the scissor arm are aligned parallel to each other, which is the case for instance with the door closed or rotationally opened.

In such an embodiment, no further element needs to be provided, which is opposite the scissor arm or the scissor arm or another Part of the scissor fitting is variably fixed in different positions, since the coupling of the scissor arm is variable with the scissor handlebar itself. In this way, the fitting assembly according to this embodiment need not be fundamentally different from conventional fitting arrangements, but only in that the coupling of the scissor arm with the scissor arm has a variable articulation point, through which the effective length of the scissor fitting can be changed in a simple manner. In order to adjust the effective length at a malposition of the wing, then advantageously a mechanism is provided, although allowing an adjustment of the position of said articulation point, in particular when tilting the wing, the point of articulation after reaching the correct position but, in particular during the pivoting opening of the wing, at the wing is usually worn by the scissor fitting, determines and keeps stable.

In a further development, this function is achieved in that the coupling element comprises at least one toothing formed on the scissor arm and at least one counter toothing formed on the scissor arm, wherein the toothing and the counter toothing are adapted to interlock when the scissor arm and the scissor arm are aligned parallel to each other are. In this case, the meshing of the teeth and the counter-toothing advantageously results in the variable common articulation point of the scissor arm and the scissor arm being fixed to a specific position, in particular at the time of meshing. Here, the scissor arm may comprise a clamping part, in which case the clamping part may have a toothing as part of the scissor arm.

The toothing and the counter toothing interlock at least when the scissor arm and the scissor arm are aligned parallel to each other, that is approximately in the closed position of the scissors fitting. It is conceivable that they are also in other positions of the scissors fitting mesh. Basically, it is sufficient if the teeth mesh with closed scissors fitting and thus set the otherwise changeable effective length of the scissor fitting. Because only in rotatable state of the wing of the wing is supported by the scissor fitting and depends on the inclination and thus a possible malalignment of the wing of the effective length of the scissors fitting. In contrast, the wing when tilted, have no malposition, since the wing with the tilting axis facing side (usually bottom, but can also be the top) is supported on the frame and thereby aligned correctly. Therefore, in the tilt-open state of the wing, the effective length of the then sheared shear fitting need not be fixed.

The automatic adjustment of the teeth and counter teeth to each other then takes place when closing the tilt-open wing. By resting the wing on the lower or upper cross member of the frame or a closure member provided there, the wing in the tilt-open state has a correct orientation, the shortened compared to the misalignment (with hanging wing) or extended (with too high raised wing) can be , Since the teeth and the counter teeth do not interlock with the scissors fitting disengaged, the articulation point between the scissor arm and the scissors link is initially freely adjustable within the scope of the possible adjustability and assumes the position corresponding to the current orientation of the wing and thus automatically correct. The effective length of the scissor fitting is set correctly by this, but must still be fixed, ie fixed, so that it is maintained even with a subsequent pivotal opening of the wing. This happens when closing the tilt-open sash. Then namely the scissors fitting closes and interlock the teeth and the counter teeth so that they prevent the position of the articulation point can continue to change. Thus, therefore, the effective length of the scissors fitting is determined and remains as long as the teeth and counter-teeth remain in engagement with each other, ie, as long as the scissor fitting remains closed, in particular so when a rotary opening of the wing.

In contrast to an embodiment in which, as described above, the variability of the relative position of the two variable parts is achieved by moving the parts in conjunction with a latching mechanism, the automatic adaptation of the effective length of the scissors fitting does not take place during closing in the embodiment last described of the revolving wing, but when closing the tilt-open wing.

According to a further development, the toothing is formed on a longitudinal side of the scissor arm facing the wing, and the counter toothing is formed on a longitudinal side of the scissor arm facing the wing. In this case, the one longitudinal side of the scissor arm or of the scissor arm is meant with the longitudinal side facing the wing, which in the tilting direction, ie in the direction of the wing and away from the frame, points at tilt-opened wing. In principle, conversely, the toothing can also be formed on a longitudinal side of the scissor arm facing away from the wing and the counter toothing on a longitudinal side of the scissor arm facing away from the wing. Furthermore, in a further embodiment, two toothings arranged on opposite longitudinal sides of the scissor arm can be formed on the scissor arm and two counter toothings arranged on opposite longitudinal sides of the scissor arm can be formed on the scissor arm. In this case, the teeth and the counter teeth are advantageously each arranged so that they can interlock when closing the scissors fitting, so when pivoting the scissor arm and the scissor arm relative to each other in a mutually parallel alignment. Depending on the position of the articulation point, the toothing and counter toothing, in particular with respect to a longitudinal orientation, are also arranged differently relative to one another, such that the arrangement arranged in such a way results from the intermeshing Gearing and counter-toothing of the articulation point is set in its respective position.

Furthermore, it is advantageous if the toothing is designed to be pivotable on the scissor arm and is spring-biased in the direction of the counter-toothing and / or that the counter-toothing is designed to be pivotable on the scissor arm and spring-biased in the direction of the toothing. The teeth (or counter teeth) can thus be swung out with open scissors fitting due to the bias in the direction of the counter teeth (or teeth). This has the consequence that when closing the scissors fitting, for example, when closing the tilt-open wing, the teeth and the counter teeth already meet before the scissor arm and the scissor arms are completely aligned parallel to each other. As a result, at least one tooth or some teeth of the toothing can already engage in the counter toothing (or vice versa) before the toothing and the counter toothing are aligned in parallel and engage flush with one another. This premature interaction together with the spring preload can advantageously lead to the intermeshing of the toothing and the counter toothing tends to set a slightly shortened (for example, by a tooth pitch of the toothing) compared to the current wing alignment effective length of the scissor fitting in which the wing slightly raised when closing becomes. Due to the slightly shorter effective length, the fitting arrangement can then just be particularly well suited to keep the rotating-open wing against gravity so stable that it does not run when closing on the frame.

In one embodiment, said articulation point is defined by an engaging in a slot of the scissor arm pin of the scissor arm or by engaging in a slot of the scissor arm pin of the scissor arm. To provide a pin on the scissor arm (or scissor arm), the in a hole on the scissor arm (or scissor handlebars) engages, is a structurally particularly simple way, the scissor arm and the scissor link articulated to each other. To make the articulation point of this articulated coupling variable, it is therefore advantageous to form the hole as a slot. A determination of the position of the pin in the slot for fixing the point of articulation does not need to be done by an interaction of the pin with the slot, but can also be done elsewhere, such as by means of said teeth and counter teeth, between the scissor arm and the scissor arm.

However, it is advantageous if the slot has an internal toothing, wherein the pin has a radial extension which is adapted to engage in the internal toothing, when the scissor arm and the scissor arms are aligned parallel to each other. In this case, the extension can point away from the internal toothing when the scissors fitting is released, so that the pin can be arranged substantially freely in the slot. By closing the scissors fitting, whereby the scissor arm and the scissor arms are aligned parallel to each other, then engages the extension in the internal teeth, and thus determines the position of the pin in the slot and consequently also the point of articulation of the scissor arm on the scissor arm. In particular, when the scissor arm is pivoted into the parallel orientation relative to the scissor arm, the extension can already engage the internal teeth if the scissor arm and the scissor arm are not yet aligned completely parallel to one another. Similar to the previously described pivotable and preloaded toothing, this can bring about an advantageous slight shortening of the effective length of the scissors fitting relative to the correct orientation of the blade predetermined by the abutment of the wing on the frame, by slightly lifting the wing.

According to an alternative embodiment, the toothing is formed on a scissor arm facing the top of the scissor arm. For this purpose, a clamping part can be provided which is rotatably coupled to the articulation point and laterally displaceable along the axis of rotation with the scissor arm. The counter-toothing can be provided opposite the toothing on a side facing the scissor arm side of the clamping part.

Such an embodiment has the advantage that no structural adaptation of the scissor arm must be made. Rather, existing systems can only be converted to the new system by replacing the scissor link, and not additionally the scissors arm.

Furthermore, the clamping part on a side facing the scissor arm and / or the scissor arm on a side facing the clamping part have at least one elevation, wherein the elevation is formed to effect a lateral displacement of the clamping part along the axis of rotation during tilting, whereby the toothing of Scissor arm can be brought into engagement with the counter-toothing of the clamping part.

In this way, a reliable engagement between the teeth of the scissor arm and the counter-toothing of the clamping part is achieved during the closing ßens from a tilted position.

Preferably, the clamping part on the side facing the scissor arm have two elevations, which are advantageously arranged on opposite sides of the Anlenkpunkts. In particular, the two protrusions may be arranged in opposite end regions of the scissor arm.

This has the advantage that the clamping part remains aligned during the lateral displacement along the axis of rotation parallel to the scissor arm, whereby tilting of the clamping part is prevented.

It is also conceivable that the scissor arm on the side facing the clamping part has two elevations, which may be arranged on opposite sides of the articulation point.

This would have the advantage that no survey on the clamping part is required more and thus a simpler and more cost-effective production of the clamping part is possible.

The first coupling point can also be designed to be frictional. This has the advantage that when closing the wing from the tilted position a contact pressure between the clamping part and the scissor arm is generated, whereby first engages the longitudinal toothing of the clamping part in the opposite counter-toothing of the scissor arm before the scissor fitting can zuscheren. However, such a frictional first coupling point can also be provided in any other embodiment. Furthermore, any other coupling point can be made frictional.

Fig. 1A bis 1C

zeigen eine erste Ausführungsform einer erfindungsgemäßen Beschlaganordnung in einer perspektiven Ansicht, einer Teilansicht von oben und einer Schnittansicht von der Seite.

Fig. 2A und 2B

zeigen in einer Ausschnittsvergrößerung der Fig. 1C die erste Ausführungsform in zwei verschiedenen Zuständen.

Fig. 3A bis 3C

zeigen eine zweite Ausführungsform einer erfindungsgemäßen Beschlaganordnung in einer Ansicht von der Seite, einer Ansicht von oben und einer Ausschnittsvergrößerung der Ansicht von oben bei geschlossenem Scherenbeschlag.

Fig. 4A und 4B

zeigen die zweite Ausführungsform in einer Ansicht von oben und in einer Ausschnittsvergrößerung der Ansicht von oben bei geöffnetem Scherenbeschlag.

Fig. 5A bis 5C

zeigen eine dritte Ausführungsform einer erfindungsgemäßen Beschlaganordnung in einer Ansicht von der Seite, einer Ansicht von oben und einer Ausschnittsvergrößerung der Ansicht von oben bei geschlossenem Scherenbeschlag.

Fig. 6A bis 6C

zeigen die dritte Ausführungsform in einer Ansicht von oben, einer Ausschnittsvergrößerung der Ansicht von oben und einer weiteren Ausschnittsvergrößerung der Ansicht von oben bei geöffnetem Scherenbeschlag.

Fig. 7

zeigt eine vierte Ausführungsform der erfindungsgemäßen Beschlaganordnung in einer perspektivischen Ansicht bei geöffnetem Scherenbeschlag.

Fig. 8A und 8B

zeigen die vierte Ausführungsform in einer Ansicht von unten und eine Detailansicht B von Fig. 8A.

Fig. 9A und 9B

zeigen die vierte Ausführungsform in einer Ansicht von oben bei geöffnetem und geschlossenem Scherenbeschlag.

Fig. 10A bis 10C

zeigen die vierte Ausführungsform in einer perspektivischen Ansicht, einer Seitenansicht und eine Detailansicht C von Fig. 10B.

The invention will be explained in more detail by way of example only with reference to the figures.

Fig. 1A to 1C

show a first embodiment of a fitting assembly according to the invention in a perspective view, a partial view from above and a sectional view from the side.

FIGS. 2A and 2B

show in a detail enlargement the Fig. 1C the first embodiment in two different states.

Figs. 3A to 3C

show a second embodiment of a fitting arrangement according to the invention in a view from the side, a view from above and an enlarged detail of the view from above with closed scissors fitting.

FIGS. 4A and 4B

show the second embodiment in a view from above and in an enlarged view of the top view with open scissors fitting.

Figs. 5A to 5C

show a third embodiment of a fitting arrangement according to the invention in a view from the side, a view from above and an enlarged detail of the view from above with closed scissors fitting.

FIGS. 6A to 6C

show the third embodiment in a top view, an enlarged view of the top view and a further enlargement of the top view with the scissors fitting open.

Fig. 7

shows a fourth embodiment of the fitting arrangement according to the invention in a perspective view with open scissors fitting.

Figs. 8A and 8B

show the fourth embodiment in a view from below and a detail B of Fig. 8A ,

Figs. 9A and 9B

show the fourth embodiment in a top view with open and closed scissors fitting.

10A to 10C

show the fourth embodiment in a perspective view, a side view and a detailed view C of Fig. 10B ,

In each of the embodiments illustrated in the figures, the respective fitting arrangement 11 comprises a scissor fitting 13, which has a scissor arm 15, a scissor arm 17 and a scissor cuff 19. The scissor arm 15 and the scissors link 17 are elongate and articulated at an articulation point 21 coupled to each other, wherein the articulation point 21 at one end of the scissor arm 17, but spaced from one end of the scissor arm 15 is arranged.

The scissors tuft 19 may be secured to an upper surface of a sash, not shown, of a window, door or the like and serves to connect the scissors fitting 13 to the sash. In this case, the scissors turret 19 has a first coupling point 23, at which the scissors link 17 is pivotally coupled to the Scherenstulp 19 with the opposite end of the articulation point 21 and in this way can be coupled indirectly with a respective wing.

The scissors arm 15 is thus connected on the one hand via the scissors link 17 with the scissor plate 19. On the other hand, however, the scissor arm 15 also engages directly with an end adjacent to the articulation point 21 in a slot 25 of the scissor collar 19, so that the scissor arm 15 is pivotally coupled to the scissor cuff 19, but this coupling has no fixed coupling point, but along the extension of the slot 25 is variable. By this arrangement, the scissors fitting 13 in an example in Fig. 4 and 6 Shake off the position shown. It is limited by the slot 25, how far the scissors fitting 13 can be opened (in Fig. 4 and 6 the maximum position is shown).

With the end of the articulation point 21 more distant end of the scissor arm 15 is coupled via a connecting member 27 at a second coupling point 29 with a band angle 31 (see. FIGS. 3A and 3B and 5A and 5B). About this band angle 31, the scissors fitting 13 can be pivotally mounted on a scissor bearing, not shown, attached to the frame. In this way, the scissors fitting 13 can couple a wing with the frame and stabilize the wing when turning open and tilting the wing relative to the frame. The connecting member 27 is formed as a support bracket in the form of an angle with two legs, which is connected with one leg with the scissor arm 15 and with the other leg with the band angle 31.

In the first embodiment according to Fig. 1 and 2 the scissors arm 15 and the carrying handle 27 are not rigidly coupled to each other, but are slidably coupled relative to one another in the longitudinal direction via a coupling element designed as a one-way clutch 33. Here, the one-way clutch 33 is formed such that the scissor arm 15 can be moved in the direction of the band angle 31 relative to the support bracket 27, but is blocked against displacement in the opposite direction. In this way, the effective length of the scissors fitting 13 can be automatically shortened when the scissor arm 15 is urged in the direction of the band angle 31. An automatic extension is excluded.

In the FIGS. 2A and 2B the one-way clutch 33 is shown enlarged. It can be seen that the one-way clutch 33 has a latching device 35 which comprises a toothing 37 on the carrying handle 27 and a counter-toothing 39 arranged on the scissor arm 15. The counter-toothing 39 is formed on a pivotally mounted on the scissor arm 15 pawl 41. The pawl 41 is between the FIGS. 2A and 2B swiveled positions shown, so that the pawl 41 engage with the counter teeth 39 in the locking recesses formed by the teeth 37 as shown or can be released from these. In this case, the pawl 41 by an unrepresented spring element in the in Fig. 2A biased engaged position shown biased.

The tooth flanks of the toothing 37 facing the band angle 31 are aligned perpendicular to the longitudinal axis L of the scissor arm 15, while the tooth flanks facing away from the band angle 31 are aligned obliquely to the longitudinal axis L. For this purpose, the pointing away from the band angle 31 tooth flanks of the counter teeth 39 are aligned perpendicular to the longitudinal axis L, while the band angle 31 facing tooth flanks are aligned obliquely to the longitudinal axis L. This has the consequence that when exerting a displacement force on the scissor arm 15 in direction away from the band angle 31 (in Fig. 1 and 2 to the left) the abutting vertical tooth flanks of the toothing 37 and the counter toothing 39 block a displacement movement of the scissor arm 15 relative to the carrying handle 27. In contrast, if a displacement force acts in the opposite direction, the obliquely oriented tooth flanks of the toothing 37 and the counter teeth 39 slide along one another, whereby the pawl 41 is raised against the spring bias and enables a displacement movement of the scissor arm 15 relative to the carrying handle 27. As soon as a toothing is overcome by the displacement, however, the pawl 41 pivots back due to the bias and engages with the counter teeth 39 again in the teeth 37, so that the relative orientation of the scissor arm 15 relative to the support bracket 27 is secured again.

In this way, the described first embodiment allows an automatic shortening of the effective length of the scissors fitting 13 when the scissor arm 15 is urged in the direction of the belt angle 27, in particular by running the wing on the frame when closing the rotopen Wing is the case. An extension of the effective length, however, is not automatically possible, but only by manually releasing the pawl 41. The pawl 41 is mounted on the respective wing-facing underside of the scissor arm 15 and protected in this way against unintentional adjustment. In this case, however, a recess in the scissor arm 15 is provided through which access to the pawl 41 from the top of the scissor arm 15 is made possible. Thus, the pawl 41 can be actuated through the recess 43 to fit them into the in Fig. 2B to pivot shown position and to allow a manual extension of the effective length of the scissors fitting 13.

The in the Fig. 3 and 4 or 5 and 6 shown second and third embodiments of a fitting assembly 11 according to the invention differ from the fitting assembly 11 of the first embodiment described above essentially in that the scissor arm 15 is not slidable relative to the support bracket 27, but rigidly connected to the support bracket 27, and that instead of the articulation point 21, on which the scissor arm 15 is pivotally connected to the scissors link 17, not fixed, but is variable. This is achieved in that the scissors link 17 for coupling with the scissor arm 15 has a pin 45 which engages in a slot formed in the scissor arm 15 slot 47. The articulation point 21 is then defined by the position of the pin 45 in the slot 47 and is thus within the predetermined by the extension of the slot 47 frame variable.

At least in the in the Figs. 3A to 3C or 5A to 5C shown closed state of the scissors fitting 13 to determine the articulation point 21 and thus the effective length of the scissors fitting 13, a toothing 49 and the scissor arm 17 to a corresponding counter-toothing 51 are formed on the scissor arm 15. The teeth 49 and the counter teeth 51 are each on the pointing in Kippöffnungsrichtung longitudinal side of the scissor arm 15 and the scissor arm 17 is formed. In the closed state of the scissors fitting 13, so if the scissor arm 15 and the scissors link 17 are aligned parallel to each other, engage the teeth 49 and the counter teeth 51 as shown in each other and thus determine the position of the pin 45 in the slot 47. As long as the scissors fitting 13 remains closed, the effective length of the scissors fitting 13 is thus determined and thus remains in particular during a rotational opening of the wing in the set state.

But when the wing is tilted open, the scissors fitting 13 shears, whereby the teeth 49 and the counter teeth 51 are disengaged, so that the articulation point 21 can change. Since the wing rests in the tilt-open state with its side facing the tilt axis of the window frame, it is correctly aligned, so that the articulation point 21 when closing the wing inevitably occupies the correct position within the slot 47 and then by the renewed meshing of the teeth 49 and the counter-toothing 51 is held in this position. Thus, the effective length of the scissors fitting 13 can automatically adjust to the correct length when closing the tilt-open wing and is maintained when turning open the wing.

As in particular in the FIGS. 4A and 4B can be seen is in the second embodiment ( Fig. 3 and 4 ) unlike the third embodiment ( Fig. 5 and 6 ) the counter-toothing 51 is pivotally formed on the scissor arm 17. The counter-toothing 51 can between the in the Figs. 3A to 3C shown, parallel to the longitudinal extent of the scissor arm 17 and the position in FIGS. 4A and 4B shown pivoted in the direction of the toothing 49 position, in which it is biased by a spring element 53 in the form of a spring tongue, are pivoted. In addition, the toothing 49 facing the end of the otherwise linearly extending counter teeth 51 is rounded. By this course of the counter-toothing 51 and the spring preload engages when closing the scissors fitting 13 of this rounded end first in the teeth 49, which as already described tends a slightly opposite to the predetermined by the contact of the wing on the frame position of the articulation point 21 shortened effective length the scissors fitting 13 is set.

A similar effect will be obtained in the third embodiment according to FIGS Fig. 5 and 6 reached. There, however, the teeth 49 and the counter teeth 51 are not formed pivotable. Instead, however, as in particular in the Figs. 6B and 6C can be seen, the pin 45 has a radial extension 55 and an internal toothing 57 is formed on the slot 47. The radial extension 55 is aligned so that it does not engage in the internal toothing 57 when sheared fitting 13, that is, when about the wing is tilted open. Thus, the pin 45 in the slot 47 occupy different positions. When closing the scissors fitting 13 of the pin 45 assumes the predetermined by the contact of the wing on the frame, a correct effective length of the scissors fitting 13 corresponding position. In addition, while the pin 45 rotates in the slot 47, so that the extension 55 is brought into engagement with the internal toothing 57. Due to the rotation of the pin 45 with the extension 55 of the extension 55 tends to engage in such a manner in the internal teeth 57, that the articulation point 21 is urged into a slightly shorter effective length corresponding position, even before the teeth 49 and the counter teeth 51 mesh and additionally secure the set effective length.

The in the FIGS. 7 . 8th . 9 and 10 illustrated fourth embodiment differs essentially from the second and third embodiments described above in that a counter-toothing 59 is formed on an upper side of the scissor arm 17 facing the scissor arm 15 and a clamping part 61, which is arranged between the scissor arm 15 and the scissors link 17, a toothing 63 which can come into engagement with the counter teeth 59.

The scissors link 17 is pivotally coupled to the scissors arm 15 at the first coupling point 23 with the scissors turret 19 and at the articulation point 21 and transversely to a rotational axis 75 of the articulation point 21. In addition to the counter-toothing 59 on the top of the scissor arm 17, the scissor arm has a lateral counter-toothing 65 (see Fig. 8B ), which is opposite to a lateral toothing 67 of the clamping part.

The clamping member 61 is elongate and largely U-shaped profile. At the top of the scissor arm 17 opposite side of the clamping part 61, the counter teeth 59 is formed. On one of the inner side surfaces of the clamping part 61, namely on the side surface, which transmits a force on the scissor arm 17 when closing the scissors fitting from the tilted position, the lateral toothing 67 is formed. When the counter teeth 59 and 65 are not engaged with the gears 63 and 67, the clamping member 61 and scissor arms 17 can move relative to each other along their longitudinal axes since the pin 45 is slidable in the slot 47 along the longitudinal axes.

At the top of the clamping member 61, two elongated projections 69 (see Fig. 9A and 10C ), which are respectively arranged on opposite sides of the articulation point 21 in opposite end portions of the clamping part 61. The height of these elevations 69 corresponds approximately to the height of the lateral counter-toothing 65.

In the following, it is first illustrated how the teeth 63, 67 of the clamping part 61 with the counter teeth 59, 65 of the scissors arm 17 in Engage and come away again. It will then be explained how the effective length of the scissors fitting 13 can be corrected with the aid of this mechanical construction.

In an open position of the scissors fitting 13 ( Fig. 7 . Fig. 9A ) are the elevations 69 from the scissor arm 15 spaced. Now, if the wing is closed from a tilted position, the scissors fitting begins 13 zuzuscheren. By friction, which is generated at the first coupling point 23 between the scissor link 17 and scissor plate 19, for example by a brake disc 77, the pivotal movement of the scissor arm 17 is inhibited. As a result, when the scissors fitting 13 is released, the scissors link 17 comes into contact with the clamping part 61 on the sides of the counter-toothing 65 and the toothing 67, as a result of which the counter-toothing 65 engages in the toothing 67. At the same time or by further shuffling, the elevations 69 come into contact with the sides of the scissor arm 15 and are chamfered 71 on the sides of the scissor arm 15 and / or frontal bevels 73 on the elevations 69 in the direction of the scissor arm 17, ie Fig. 7 down, pressed. As a result, the clamping part 61 is displaced along the axis of rotation 75 at the articulation point 21, so that the toothing 63 comes into engagement with the counter toothing 59.

If the scissors fitting 13 is opened again by tilting the wing, in an opened state ( Fig. 9A ) the projections 69 are no longer acted upon by the scissor arm 15 with a force in the direction of the scissor arm 17. By a relative movement between scissor link 17 and clamping member 61, the helical teeth of the counter teeth 59 and the teeth 63 can slide on each other. At the same time, toothing 67 and counter toothing 65 decouple, in that the scissor arm is moved in the direction of the side of the clamping part 61 opposite the toothing 67. This results in that the clamping part 61 on the scissors arm 17 along its longitudinal axis on the other hand, it can move away from the scissors link 17 along the axis of rotation 75 again.

In the manner described thus engagement of the teeth 63, 67 can be realized in the counter teeth 59, 65 and canceled again. The following illustrates how the effective length of the scissors fitting 13 can be corrected with the aid of these toothings.

If the effective length of the scissors fitting 13 is too large and thus the wing "hangs", ie the band-distant side of the wing is arranged too low, the wing during rotation closing initially runs on its lower side on the frame and is thereby forcibly lifted and thus corrected in his position. When the door is open and closed ( Fig. 9B . 10A, 10B 10C ) is the teeth 63 with the counter teeth 59 and possibly also the teeth 67 with the counter teeth 65 into engagement, so that at the time of closing from a rotationally open state, no shortening of the effective length of the scissors fitting 13 can take place. The scissors fitting 13 tense up instead.

Now, if the wing tilted open, the position of the wing remains corrected, since the lower side of the wing still rests on the frame. With tilt-open wing ( Fig. 7 . 8A . 8B . 9A As described above, the splines 63, 67 are decoupled from the counter teeth 59, 65. Therefore, the clamping member 61 and scissor arms 17, guided by the pin 45 in the slot 47, can move relative to one another along their longitudinal axes. Due to the relative movement between the clamping part 61 and scissor link 17, the tension of the scissors fitting 13 is reduced. If now the wing (from the tilted position) is closed, first the toothing 67 engages in the counter-toothing 65, as already described, whereby the desired, shortened, effective length of the scissors fitting 13 is determined. When further closing the wing grab also the teeth 63 and the counter teeth 59 into each other, is held by the ultimately achieved with fully closed wing, the effective length achieved. By the invention is thus achieved that the effective length of the scissors fitting 13 is automatically set so that the wing does not run when closing from the rotationally opened state on the frame. A possibly occurring due to wear, unwanted, renewed lowering of the wing is compensated reliably by the invention when tilting automatically by further shortening the effective length of the scissors fitting 13.

All four embodiments have in common that they achieve in a structurally simple manner, an automatic correction of a malposition of the wing relative to the frame by taking advantage of the fact that the wing is urged upon closing by the frame inevitably in a correct position, and by the inventive fitting arrangement 11 it allows that the effective length of the scissors fitting 13 when closing change, in particular can shorten, but then against renewed lengthening, in particular during the rotary opening of the wing, is blocked.

LIST OF REFERENCE NUMBERS

11

fitting assembly

13

scissors fitting

15

Scherenarm

17

arm hinge

19

Stay guide

21

articulation point

23

first coupling point

25

Long hole

27

connecting member

29

second coupling point

31

tape angle

33

way clutch

35

locking device

37

gearing

39

counter teeth

41

pawl

43

recess

45

spigot

47

Long hole

49

gearing

51

counter teeth

53

spring element

55

extension

57

internal gearing

59

counter teeth

61

clamping part

63

gearing

65

lateral counter teeth

67

lateral toothing

69

surveys

71

chamfers

73

bevel

75

axis of rotation

77

brake disc

L

longitudinal axis

Claims (15)

Fitting arrangement (11) for a window, a door or the like with a scissors fitting (13) comprising a scissor arm (15) and a scissor arm (17) pivotally coupled to the scissor arm (15), the scissor arm (17) being connected to a first coupling point (13). 23) can be coupled to a wing of the window or the door, and wherein the scissor arm (15) can be coupled to a scissors bearing which can be fastened to the window frame or door at a second coupling point (29), in order to pivotably mount the wing to the window frame,
wherein two parts of the scissors fitting (13) and the scissor bearing comprehensive support structure relative to each other are variably fixed in different positions in order to adjust the effective length of the scissors fitting (13),
characterized,
that the two parts by at least one adjustable coupling element (33; 61 49;; 51) are connected to each other, which is adapted to be automatically set when the window is closed so that a misalignment of the blade by shortening or lengthening the effective length of Scissors fitting (13) is corrected. Fitting arrangement according to claim 1,
characterized,
that the two variably fixable parts relative to each other displaceable and via a coupling element forming the one-way clutch (33) with each other are coupled, which allows a sliding movement of the parts in one direction and blocked in the other direction,
in which
the one-way clutch (33) is designed, in particular, to permit a sliding movement of the parts that shortens the effective length of the scissors fitting (13) and to block a sliding movement of the parts that extends the effective length of the scissors fitting (13). Fitting arrangement according to claim 2,
characterized,
in that the one-way clutch (33) is effective between a scissor-bearing-side end region of the scissor arm (15) and a connecting component (27) provided for fastening the scissor arm (15) to the scissor bearing, in particular a carrying strap or a belt angle (31), and / or
in that the one-way clutch (33) is integrated in a band angle (31) of the scissors fitting (13) or in the scissor bearing (31). Fitting arrangement according to claim 2 or 3,
characterized,
in that the one-way clutch (33) has a latching device (35), and in particular
in that the latching device (35) comprises a toothing (37) formed on one of the displaceable parts and a mating toothing (39) cooperating therewith and formed on the other part. Fitting arrangement according to claim 4,
characterized,
that the toothing (37) has an asymmetrical tooth shape, and in particular
in that the tooth flanks of the toothing (37) pointing to one side run obliquely to a longitudinal axis (L) of the scissor arm (15) and the tooth flanks of the toothing (37) pointing to the opposite side run at right angles to the longitudinal axis (L). Fitting arrangement according to at least one of claims 4 or 5,
characterized,
in that the latching device (35) comprises a pawl (41) which is movably, in particular pivotably, mounted on one of the displaceable parts and engages in latching recesses of the other part, preferably formed by a toothing (37), and in particular that the pawl ( 41) is biased by a spring element in any displacement movements of the parts blocking blocking position. Fitting arrangement according to claim 6,
characterized,
in that the pawl (41) is mounted directly on a scissor bearing-side end region of the scissor arm (15)
and or
in that the pawl (41) is mounted on an underside of the scissor arm (15) facing the sash of the window or door, a recess (43) of the scissor arm (15) providing at least partial access to the pawl (41) from the top of the scissor arm (15) Scissor Arm (15) made possible. Fitting arrangement according to claim 1,
characterized,
in that said one of said two parts is the scissors arm (15) and the other of said two parts is the scissor arms (17), the scissor arm (15) and the scissor arm (17) being longitudinally of the scissor arm (15) closed scissors fitting (13) variable common articulation point (21) on which they are pivotally coupled together. Fitting arrangement according to claim 8,
characterized,
in that the coupling element comprises at least one toothing (49, 63, 67) formed on the scissor arm (15) and at least one counter-toothing (51, 59, 65) formed on the scissor arm (17), the toothing (49, 63, 67) and the counter teeth (51; 59, 65) are adapted to engage with each other when the scissors arm (15) and the scissors link (17) are aligned parallel to one another. Fitting arrangement according to claim 9,
characterized,
in that the toothing (49, 67) is formed on one, in particular exactly one, longitudinal side of the scissor arm (15) facing the wing, and that the counter toothing (51, 65) is formed on a longitudinal side of the scissor arm (17) facing the wing. Fitting arrangement according to claim 9 or 10,
characterized,
in that two toothings (49, 67) arranged on opposite longitudinal sides of the scissor arm (15) are formed on the scissor arm (15) and that two counter teeth (51, 65) arranged on opposite longitudinal sides of the scissor arm (17) are formed on the scissor arm (17) are. Fitting arrangement according to at least one of claims 9 to 11,
characterized ,
in that the toothing (49; 63) is pivotably formed on the scissor arm (15) and is spring-biased in the direction of the counter-toothing (51; 59) and / or that the counter-toothing (51; 59) is pivotably formed on the scissor-type link (17) and in the direction of the toothing (49; 63) is spring-biased. Fitting arrangement according to at least one of claims 8 to 12,
characterized ,
characterized in that said articulation point (21) by a pin (45) of the scissors arm (17) engaging in a slot (47) of the scissor arm (15) or by a pin (45) of the scissor arm (17) engaging in a slot (47) of the scissor arm (17) Scissor arm (15) is defined. Fitting arrangement according to claim 13,
characterized in that
the slot (47) has an internal toothing (57), the pin (45) having a radial extension (55) adapted to engage the internal toothing (57) when the shearing arm (15) and the scissor arm (17 ) are aligned parallel to each other. Fitting arrangement according to at least one of claims 9 to 13,
characterized,
in that the counter-toothing (59) is formed on an upper side of the scissor arm (17) facing the scissor arm (15),
in that a clamping part (61) is provided which is rotatable at the articulation point (21) and laterally displaceably coupled to the scissor arm (15) along the axis of rotation (75), and that the counter toothing (59) of the toothing (63) opposite, on a scissor arm (17) facing side of the clamping part (61) is provided,
and particularly
that the clamping part (61) on a side facing the scissor arm (15) side and / or the scissor arm (15) on a side facing the clamping part (61) side has at least one elevation (69), said projection (69) is formed at the Tilting causing a lateral displacement of the clamping member along the axis of rotation (75) to engage the counter-toothing (59) of the scissor arm (17) with the toothing (63) of the clamping member (61),
and further particularly
that the clamping part (61) on the stay arm (15) facing side, two projections (69) which are arranged advantageously on opposite sides of the articulation point (21) and in particular in opposite end portions of the clamping part (61),
and further particularly
that the scissor arm (15) on the clamping part (61) facing side has two projections (69) which are arranged advantageously on opposite sides of the articulation point (21),
and further particularly
that the first coupling point (23) is subject to friction.

Images