FITTINGS FOR A TILT WINDOW

Abstract

 Fittings provided for a window with a fixed frame and a tiltable leaf (23), whereby the leaf is provided with a fitting groove (22) along its outer contour. The fittings comprise a support part (5) that can be fixedly attached in a fitting groove (22), a glide piece (6) that is slideable relative to the support part, a main arm (3) that at one end is hingedly connected to the fixed frame and at the other end to the glide piece, and a support arm (4) that is hingedly connected at an end to the support part and at the other end to the main arm, whereby the fittings are configured such that, when in use, when moving the leaf from the close position to the open tilt position or vice versa the support part and the glide piece move relative to each other over a predefined stroke of the glide piece

Description

[0001] The present invention relates to fittings for a tilt window.

[0002] More specifically, the invention relates to fittings for a window with a fixed frame and a leaf that is tiltably applied around a horizontal axis of a leaf that is rotatably applied around a vertical axis and is tiltable around a horizontal axis.

[0003] The control of such fittings is typically provided with an operating mechanism for controlling the fittings by rotating an operating crank that is applied on the leaf. Typically, such operating crank can be rotated between a close position in which the window is closed, a tilt position in which the leaf can tilt around a horizontal axis and possibly a turn position in which the leaf can turn around a vertical axis. The rotational movement of the operating crank is converted by the operating mechanism into a translation movement of sliding parts, such as sliding slats and/or latches of the fittings which are slideably applied in a fitting groove, provided to that end in the profile, along the outer contour of the leaf. For converting the sliding movement of a sliding part applied in a horizontal fitting groove of the leaf to a sliding movement of a sliding part applied in a vertical fitting groove of the leaf, corner transmissions can be used that partially extend in the horizontal and in the vertical fitting groove.

[0004] If the control is in the tilt position, the leaf can hinge around the horizontal axis to a certain fixed open tilt position whereby at the upperside of the window a certain opening is created, i.e. the tilt opening. To maintain said tilt opening, the fittings typically provide a scissor mechanism which is attached at the upperside of the window between the leaf and the fixed frame.

[0005] The scissor mechanism comprises a main arm, a support arm, and a support part which is fixedly attached to the leaf, typically in a fitting groove provided to this end. The main arm is hingedly and translatively connected to the leaf at one end and at the other end is hingedly connected to the fixed frame. At one end the support arm is hingedly connected to the main air, at the other end it is connected to the support part.

[0006] The scissor mechanism is such that the main arm and the support arm can hinge relative to each other, whereby in closed condition of the window, the main arm and the support arm are positioned substantially parallel relative to each other. When tilting the window to the open tilt position both arms turn open, whereby simultaneously the hinge at the end of the main arm moves in the longitudinal direction relative to the fitting groove in the leaf up against a restrictor. Thus, the scissors prevent the window from opening when tilting it open, which is important in terms of safety. Usually, the weight of the leaf helps to keep the leaf open.

[0007] However, tilt windows can unintentionally slam shut again from the open tilt position, for example due to a gust of wind. To prevent this or in any case make this more difficult, an anti-slam device is typically provided. This is for example a type of snap-in which is mounted on the end of the main arm that is connected to the support part and which holds the leaf with a certain resistance in the open tilt position. Said resistance needs to be big enough to effectively counter any unwanted slamming of the window, but must not be too big because said resistance needs to be overcome when intentionally closing the leaf and a smooth and comfortable intentional closing without requiring too much force is desirable.

[0008] US 2005/0284025 and DE 2023535 A1 disclose a scissor mechanism whereby the main arm of the scissors is coupled to the leaf by inserting a pin at the end of the main arm, in a groove in the leaf. Said groove serves as a guide element, in which the pin of the main arm can move between two extremes that are reached in the close position and the fixed tilt position of the leaf respectively.

[0009] US 8161683 B2 discloses a scissor mechanism whereby the main arm of the scissors is hingedly attached to a control at one end which can move in a guide attached to the leaf.

[0010] EP 2020476 A2 relates to a locking element for securing a pin provided at an arm of fittings, whereby the pin is rotatably applied in an opening in a slide component of fittings.

[0011] The invention aims to provide an alternative for fittings as described above. An objective of the invention is to provide a solution that can be efficiently and effectively applied for tilt windows in a broad range of dimensions and weights.

[0012] Another objective of the invention is to provide a solution whereby the tilt opening is adjustable.

[0013] Yet a further objective of the invention is to provide a solution whereby the slam resistance of the window is adjustable from the open tilt position.

[0014] To at least partially provide a solution to meet one or several of the aforementioned objectives, the invention provides fittings for a window with a fixed frame and a tiltable leaf around a horizontal axis.

[0015] The fittings comprise a support part which can be fixedly attached in a relevant fitting groove along an outer contour of the leaf and a glide piece that is slideable relative to the support part. Typically, the fitting groove, in which the support part is fixedly applied, is a horizontal fitting groove at the upperside of the leaf.

[0016] The fittings also comprise a main arm that can be hingedly connected at one end to the fixed frame and at the other end can be hingedly connected to the glide piece and a support arm that can be hingedly connected to the support part at one end and at the other end is hingedly connected to the main arm.

[0017] The fittings are configured thus that when in use in the close position of the window, the main arm and the support arm are substantially parallel with the glide piece and the support part, and in open tilt position the main arm and support arm form an angle relative to each other and relative to the support part and the glide piece, and that when moving the leaf from the close position to the open tilt position or vice versa the support part and the glide piece move relative to each other over a stroke of the glide piece. The greater the stroke, the greater the tilt opening is in the open tilt position of the window.

[0018] Optionally, the slideable glide piece can be slideably applied in the fitting groove such that the glide piece can move towards or away from, respectively, the support part in the fitting groove over a stroke of the glide piece, depending on the distance between the glide piece and the support part in the close position or turn position. On reaching the maximum tilt opening, the glide piece hits the support part. The support part thus delimits the stroke of the glide piece. Alternatively, optionally the slideable glide piece can be slideably applied in an oblong-shaped opening in the support part whereby the oblong-shaped opening acts as a guide for the glide piece when sliding the glide piece relative to the support part.

[0019] At one end to be hingedly connected to the glide piece, the main arm of the fittings is provided with a coupling pin and the glide piece is provided at its upperside in the longitudinal direction with several coupling openings, whereby the coupling pin can be removably applied in a selected coupling opening for hingedly connecting the main arm to the glide piece.

[0020] The advantage of the configuration according to the invention whereby in the longitudinal direction of the glide piece several coupling openings are provided, is that the user or the owner of the window, can attach the main arm in a coupling opening of choice using the coupling pin. The length of the stroke of the glide piece and correspondingly, the size of the tilt opening, depends on the coupling opening selected for the connection. This allows the user to choose and set the desired tilt opening in open tilt position and to adjust it again later if desired by removing the coupling pin from the coupling opening in which it is located and subsequently applying it in another desired coupling opening to connect the main arm to the glide piece and thus realise the adjusted desired tilt opening. Furthermore, it is an advantage of this configuration that the user can adjust the tilt opening in a simple but reliable way, without having to adjust or add fittings components.

[0021] Optionally the coupling pin can be provided with a ring-shaped notch at its outer contour and the glide piece can be provided with a locking element with one or more passages. This allows the coupling pin to be applied in the (selected) coupling opening in such a way that the coupling pin protrudes from the passage or one of the passages of the locking element of the glide piece, whereby the ring-shaped notch of the coupling pin snaps into the edge of the locking element delimiting the passage.

[0022] In an embodiment of the invention the locking element comprises a plate-shaped section in which several passages are applied and the glide piece is provided at one side with a groove for fittingly inserting the locking element with its plate-shaped section such that the passages align with the corresponding coupling openings. Optionally, for every passage the plate-shaped section of the locking element can be provided with a lip that protrudes downwardly relative to the plate-shaped section and at least partially overlaps with the relevant passage. This has the advantage that when inserting the coupling pin through a coupling opening in the glide piece and a passage in the locking element, the underside of the coupling pin touches the corresponding lip. When pushing further downward a force is created which forces the locking element to slide up into the position that the ring-shaped notch of the coupling pin snaps into the edge of the locking element delimiting the passage and in other words ensures an automatic coupling of the coupling pin with the glide piece. To improve the stability of said coupling, additionally or alternatively an option would be to provide the plate-shaped section of the locking element with a protrusion complementary to a notch in the groove of the glide piece, configured such that in inserted condition of the locking element with the coupling pin snapped into the locking element, the protrusion engages with the notch to lock the locking element.

[0023] In an embodiment of the invention the fittings comprise a support part that can be fixedly attached in a relevant fitting groove along an outer contour of the leaf, a glide piece that is slideable relative to the support part, a main arm that at one end can be hingedly connected to the fixed frame and at the other end can be hingedly connected to the glide piece, and a support arm that can be hingedly connected at an end to the support part and at the other end is hingedly connected to the main arm, whereby, when in use, when moving the leaf from the close position to the open tilt position or vice versa the support part and the glide piece move relative to each other over a predefined stroke of the glide piece. The fittings are further provided with an anti-slam device comprising an oblong-shaped leaf spring, one end of which is connected to the support part. The connection of the leaf spring to the support part can be done with a snap connection or also for example by providing the support part with a threaded hole and providing the leaf spring with a screw passage through which a screw can be screwed into the threaded hole. The leaf spring extends freely lengthways beyond the support part in the direction of the glide piece such that in open tilt position of the window the other end of the leaf spring snaps into the glide piece to prevent or in any case limit the window from slamming shut. Snapping out the leaf spring again is done by exercising a force on the glide piece (consistent with moving the leaf from the open tilt position to closed condition) by sliding the glide piece away from the support part which is greater than the counteracting spring force generated by the elastic deformation of the leaf spring. The spring force depends on the free length of the leaf spring. The free length of the leaf spring is chosen depending on the desired resistance against the window slamming shut from the open tilt position. Optionally, a leaf spring can be provided which is curved at its free end and in open tilt position snaps into a notch provided at the underside of the glide piece with its curved end. Preferably, the leaf spring is provided with a double bend near its free end.

[0024] Optionally, the free length of the leaf spring of the anti-slam device of the fittings can be provided adjustably. That means that a user or installer can set the slam resistance depending on the local environmental conditions, and/or the size and/or the weight of the window, the profile depth, the glass composition and/or the size of the tilt opening, and can also adjust the set length at a later time, for example in case of a changed tilt opening. Setting the free length can for example be done by providing the support part at the upperside under the freely extending leaf spring with one or several transverse grooves which each extend over at least a substantial part, typically 20% or more, of the width of the support part. This allows an adjustment piece to be fittingly inserted into a transverse groove laterally, whereby in inserted condition the adjustment piece is clamped between the leaf spring and the support part and as such the free length of the leaf spring decreases such that the slam resistance increases. This means that when one single transverse groove is provided, two free spring lengths can be chosen, i.e. corresponding with inserting the adjustment piece into the transverse groove, or not, whereby the slam resistance may or may not increase. If several transverse grooves are provided, the adjustment piece can selectively be fittingly inserted, whereby in inserted condition in the selected transverse groove, the adjustment piece is clamped between the leaf spring and the support part and as such the slam resistance can be set depending on the location of the transverse groove.

[0025] Optionally, the adjustment piece can be provided with a substantially U-shaped groove on the side facing the leaf spring, when in use, configured such that in inserted condition the leaf spring rests on the bottom of the groove and is clamped laterally by the opposite edges of the U-shaped groove.

[0026] With the intention of better showing the characteristics of the invention, a few preferred embodiments of fittings according to the invention for a tilt window are described hereinafter by way of an example, without any limiting nature, with reference to the accompanying drawings, wherein:

figure 1 schematically and partially show an embodiment of the fittings according to the invention for a window with a leaf that can be turned or tilted in a condition whereby the leaf is turned open 90°, whereby fig.1A, fig.1B, fig.1C show the fittings in a top view, in a longitudinal section according to the line C-C indicated in fig. 1A, and in a magnified view the part indicated as D in fig.1B respectively;

figure 2 shows the fittings shown in fig.1 in a condition whereby the leaf is tilted open, whereby fig.2A, fig.2B, fig.2C show the fittings in a top view, in a longitudinal section according to the line A-A indicated in fig. 2A, and in a magnified view the part indicated as B in fig.2B;

figure 3 schematically shows the components in disassembled condition of the fittings shown in fig.1 for hingedly connecting the main arm to the fixed frame;

figure 4 schematically shows an embodiment of the fittings according to the invention for a window with a tiltable leaf in a condition whereby the leaf is tilted open with a big tilt opening, whereby fig.4A, fig.4B, fig.4C partially show the fittings in mounted condition, in unmounted condition, and in a magnified view the part indicated as E in fig.4B respectively;

figure 5 schematically shows the fittings shown in fig.4 in a condition, whereby the leaf is tilted open with a smaller tilt opening, whereby fig.5A, fig.5B, fig.5C show the fittings in mounted condition, in unmounted condition, and in a magnified view the part indicated as F in fig.5B respectively;

figure 6A schematically and partially shows an embodiment of the fittings according to the invention for a window with a tiltable leaf, whereby fig.6B, fig.6C, fig.6D, fig.6E show the longitudinal section in magnified view of the part of the fittings indicated as G in fig.6A, in progressive phases of connection of the main arm to the glide piece of the fittings respectively; and whereby fig.6F shows a component, more specifically the locking element, in different views;

figure 7A schematically shows an embodiment of the fittings according to the invention for a window with a tiltable leaf, whereby fig.7B, fig.7C, fig.7D partially show the longitudinal section in magnified view of the part of the fittings, indicated as H in fig.7A, with different free lengths of the leaf spring of the anti-slam device respectively;

figure 8 shows an adjustment piece for setting the free length of the leaf spring of the anti-slam device in an embodiment of the fittings according to the invention.

[0027] The fittings shown in figures 1 to 3 are fittings for a window with a fixed frame and a leaf which relative to the fixed frame can be turned around a vertical axis and can be tilted around a horizontal axis and a control of the fittings which is movable from a close position in which the window is closed, to a tilt position for opening the window by a tilt movement of the leaf or to a turn position for opening the window by a turning movement of the leaf. Figure 1 shows the fittings with the leaf opened by turning, such that the leaf forms an angle of 90° with the fixed frame. Figure 2 shows the fittings with the leaf opened by tilting the leaf relative to the fixed frame.

[0028] Typically, a leaf is constructed from profiles, for example from aluminium, which on their outside are provided with a fitting groove such that the leaf contains a continuous fitting groove all along its outer contour. Fitting grooves are known and are typically formed by two upright parallel ribs of the profiles which are positioned at a distance from each other and the free edges of which are bent towards each other.

[0029] The fittings shown contain a sliding slat 1 that is slideably applied in the longitudinal direction in the fitting groove in the horizontal profile at the upperside of the leaf. The sliding slat 1 is workably connected, for example via one or several sliding parts 2 applied in the continuous fitting groove along the contour of the leaf, to the operating mechanism of the control device such that movements of the operating crank of the control device are converted into sliding movements of the sliding slat 1 in the horizontal fitting groove of the leaf. Examples of sliding parts include sliding slats and/or latches that are applied in the vertical and horizontal fitting grooves of the leaf and/or corner transmissions partially protruding in a vertical and partially protruding in a horizontal fitting groove in the corners of the leaf for converting the sliding movement of the sliding parts in the vertical fitting groove to the sliding parts in the horizontal fitting groove and/or vice versa.

[0030] To allow the leaf to tilt relative to the fixed frame of the window the fittings contain a scissor mechanism. The scissor mechanism is provided with a main arm 3 and a support arm 4. The support arm 4 is hingedly connected at one end to the main arm 3 and at the other end to a support part 5 that is fixedly mounted in the horizontal fitting groove of the leaf above the sliding slat 1 such that the sliding slat 1 can slide under the support part 5 in the fitting groove. The main arm 3 is provided with a coupling pin 7 at one end for coupling with a glide piece 6 via one of both coupling openings 19 provided to that end in the glide piece. Obviously more than two coupling openings 19 can also be provided on the glide piece. The glide piece 6 is applied in the horizontal fitting groove longitudinally slideable relative to both the fixed support part 5 and the sliding slat 1. This is done such that the sliding slat 1 can slide under the glide piece 6 in the fitting groove and that when opening and closing the window by a tilt movement of the leaf, the glide piece 6 shifts towards or away from, respectively, the fixed support part 5 over a stroke of the glide piece, depending on the distance between the glide piece 6 and the support part 5 when the scissor mechanism is in closed condition. Said distance between the glide piece 6 and the support part 5 depends on the chosen coupling opening 19 in the glide piece 6 in which the coupling pin 7 is applied for coupling the main arm 3 with the glide piece. It is also conceivable that the support part 5 overlaps with the glide piece 6, more specifically in an embodiment whereby the support part 5 has an oblong-shaped opening which serves as guide for the glide piece 6.

[0031] In closed condition of the scissor mechanism, for example in the close position or in turn position of the window, the latter as shown in fig.1, the main arm 3 and the support arm 4 are substantially parallel with the glide piece 6 and the support part 5. In this condition, the glide piece 6, as also shown in fig. 1C, is slid over a certain stroke relative to the support part 5.

[0032] In opened condition of the scissor mechanism, for example in an open tilt position, as shown in fig.2, the main arm 3 and support arm 4 form an angle relative to each other and relative to the support part 5 and glide piece 6. In this condition, the glide piece 6, as also shown in fig. 2C, is slid up to the support part 5. The support part 5 is provided with an anti-slam device 20 which in open tilt position snaps into a relevant notch 21 in the glide piece. The snapped-in anti-slam device 20 ensures a certain resistance against the glide piece 6 and the support part 5 moving apart and as such counteracts the leaf slamming shut from an open tilt position, for example due to a gust of wind. Closing the leaf again from an open tilt position is done by exercising sufficient pushing force on the leaf towards the fixed frame such that the anti-slam device 20 snaps out of the glide piece again and the glide piece 6 can shift away from the support part 5.

[0033] The other end of the main arm 3 is hingedly connected to the fixed frame of the window. An example of such hinged connection is shown in more detail in disassembled form in fig.3. An end of the leaf arm 8 is hingedly connected to the end of the main arm 3 which in mounted condition of the fittings is located near the vertical axis around which the leaf can be turned. Near its other end the leaf arm 8 is hingedly connected to a frame hinge piece 10 which in turn is hingedly connected to a frame corner part 12 of the fittings which is fixedly applied in a frame groove in the horizontal profile of the fixed frame at the upperside of the window. A frame groove is a fitting groove formed on the inside in the profiles of the fixed frame of the window in which frame parts of the fittings can be applied which cooperate with parts of the fittings applied in the fitting grooves of the leaf. The leaf arm 8 is also hingedly connected to the frame arm 9 which in turn is hingedly connected to the frame corner part 12 and via a leaf hinge piece 11 to the main arm. Said hinged connection between main arm 8 and fixed frame supports the tilting and turning of the leaf relative to the fixed frame.

[0034] The main arm 3 has the form of a slat whereby said slat shows a double bend 13. On the level of said double bend 13 a slot 14 is applied in the main arm 3 in the longitudinal direction. Between the double bend 13 and the end of the main arm 3 provided with the coupling pin 7, the main arm is provided with four holes 15 placed symmetrically relative to each other near the double bend. In one pair of the holes in the longitudinal direction of the main arm 3, an extended protrusion 16 is attached on the underside of the main arm, i.e. the side that, when in use, faces the upperside of the sliding slat 1, using a rivet connection protruding in the direction of the sliding slat. Alternatively, at the side facing the main arm the extended protrusion 16 can also of course be provided with screw openings through which removable screws can be screwed through the holes 15 for attachment of the extended protrusion 16 on the main arm 3. In one of the remaining holes 15, i.e. in the example shown the hole located nearest to the double bend 13, separate from the extended protrusion 16, a short protrusion 17 is applied in the transversal direction of the main arm 3, overlapping with the extended protrusion 16 in the longitudinal direction, whereby an opening is formed which is laterally delimited by the short protrusion 17 and the extended protrusion 16 respectively and at the upperside is delimited by the main arm 3. The short protrusion 17 is applied by screwing a removable screw through the relevant hole 15 in a screw opening 19 formed in the short protrusion 17 on the side facing the underside of the main arm 3 when in use. If desired, the short protrusion 17 can be easily moved to another location on the main arm, for example on the level of the hole 15 that is still free by removing the removable screw and attaching the short protrusion 17 on this other location by screwing the removable screw through said free hole in the screw opening 19 of the short protrusion 17.

[0035] A peg 18 is provided on the sliding slat 1 with a substantially cylindrical form which in mounted condition of the fittings and with the window closed, protrudes outwardly towards the main arm 3. As the sliding slat 1 is workably connected to the control device, said peg 18 shifts together with the control device and the peg 18 can act as a selection means for selecting a tilt position, a turn position or a close position according to the position of the operating crank.

[0036] Figures 4 and 5 show fittings for a tilt window in mounted condition (Fig.4A,5A) and in unmounted condition (Fig.4B,5B). The fittings shown contain a sliding slat 1 that is longitudinally slideable in the fitting groove 22 in the horizontal profile at the upperside of the leaf 23. The sliding slat 1 is workably connected via sliding parts 2 to the operating mechanism of the control device. To allow the leaf 23 to tilt relative to the fixed frame 24 of the window, the fittings contain a scissor mechanism provided with a main arm 3 and a support arm 4. The support arm 4 is hingedly connected at one end to the main arm 3 and at the other end to a support part 5 that is fixedly mounted in the horizontal fitting groove of the leaf above the sliding slat 1 such that the sliding slat 1 can slide under the support part 5 in the fitting groove 22.

[0037] The glide piece 6 is applied in the horizontal fitting groove 22, longitudinally slideable relative to both the fixed support part 5 and the sliding slat 1. The glide piece is provided with two coupling openings 19 separated from each other in a longitudinal direction. At one end, the main arm 3 is hingedly connected to the fixed frame 24 and at the other end is provided with a coupling pin 7 for coupling with a glide piece 6 via one of both coupling openings 19 provided to that end in the glide piece. The main arm 3 is hingedly connected to the glide piece 6 with the coupling pin 7, via the coupling opening 19 located nearest the support part 5 in fig. 4, and via the coupling opening 19 located furthest from the support part 5 in fig.5 respectively.

[0038] When opening and closing the window by a tilt movement of the leaf, the glide piece 6 shifts towards or away from, respectively, the fixed support part 5 over a stroke of the glide piece, depending on the chosen coupling opening 19 in the glide piece 6 in which the coupling pin 7 is applied for coupling the main arm 3 with the glide piece. Said stroke and correspondingly the tilt opening, is greater in the example shown in fig.4 than in fig.5.

[0039] Figure 6 shows an example of coupling the main arm 3 of the scissor mechanism of the fittings with the glide piece 6 by applying the coupling pin 7 in a selected coupling opening 19. Fig.6B shows the glide piece 6 and the main arm 3 in uncoupled condition. In this example, the glide piece 6 is provided with two coupling openings 19, whereby the selected coupling opening for coupling the main arm 3 is the coupling opening which, when in use, is located nearest to the support part 5 which is applied in a certain position in the fitting groove 22, such that when tilting the window, the support part does not shift relative to the leaf. Said certain position can be a fixed position but can also be adjustable and for example be set when mounting the fittings or when adjusting the window during installation or at a later time. The coupling pin 7 protrudes from the main arm 3 and near its free end at its outer contour is provided with a ring-shaped notch 25. The fittings comprise a locking element 26, see also fig.6F, with a substantially flat plate-shaped section 27 in which two passages 28 are applied in this example. Near each of the passages 28 the plate-shaped section 27 is provided with a lip 35 that protrudes downwardly relative to the plate-shaped section and at least partially overlaps with the relevant passage 28. The lips 35 protrude obliquely according to a certain profile and form an angle with the plate-shaped section 27.

[0040] On the side opposite the side which, when in use, faces the support part 5, the glide piece 6 is provided with a groove in which, as shown in fig.6C, the plate-shaped section 27 of the locking element 26 is inserted such that the passages 28 align with the coupling openings 19. This allows the coupling pin 7 to be applied in the selected coupling opening 19, whereby the coupling pin protrudes through the corresponding passage 28 of the locking element 26. When inserting the coupling pin 7 through the coupling opening 19 in the glide piece 6 and the corresponding passage 28 in the locking element 26, the underside of the coupling pin touches the sloping plane of the corresponding lip 35. When pushing further downward, as shown in fig. 6D, a force is created which causes the locking element 26 to slide up into the position that the ring-shaped notch 25 of the coupling pin 7 snaps into the edge of the locking element 26 delimiting the passage, as shown in fig. 6E. Simultaneously, a protrusion 29 of the locking element 26 snaps into a complementary notch in the groove of the glide piece 6 and the hinged connection between the main arm 3 and the glide piece is firmly locked. The locking element 26 is further provided with a stop 36 at the inserted end, such that the locking element 26 cannot unintentionally be removed from the glide piece 6.

[0041] Figures 6B to 6E successively show the steps of 'automatically locking' when pushing in. In this way it is ensured that the installer cannot forget to lock the connection. Uncoupling is manual and thus requires a deliberate action.

[0042] Figure 7 shows an example of an anti-slam device 20 of the fittings to prevent closing of the scissor mechanism and the associated unintentional slamming shut of the window from an open tilt position. The figure shows the anti-slam device 20 in a condition, whereby the scissor mechanism is closed and the glide piece 6 and support part 5 are arranged separate and at a distance from each other, in other words, the anti-slam device 20 does not snap into the relevant notch 21 in the glide piece 6.

[0043] The anti-slam device 20 comprises an oblong-shaped leaf spring 30, which at one end is connected to the support part 5 and extends freely lengthways beyond the support part 5 in the direction of the glide piece 6 and protrudes beyond the side of the support part facing the glide piece 6. At its free end, the leaf spring 30 is curved and is provided with a double bend 31 near the free end.

[0044] In open tilt position of the window the free end of the leaf spring 30 snaps into the notch 21 in the glide piece. Snapping out the leaf spring 30 again is done by exercising a force to slide the glide piece 6 away from the support part 5 which is greater than the counteracting spring force generated by the elastic deformation of the leaf spring 30. The spring force depends on the free length of the leaf spring 30. The free length of the leaf spring is chosen depending on the desired resistance against the window slamming shut from the open tilt position and in the example shown is adjustable. To this end, two transverse grooves 32 which extend over the full width of the support part 5 are provided in the support part 5 at the upperside under the freely extending leaf spring 30. This allows an adjustment piece 33, as shown for example in fig.8, to be fittingly inserted into one of the transverse grooves. The adjustment piece 33 is provided on the side facing the leaf spring 30, when in use, with a substantially U-shaped groove 34, whereby the leaf spring 30, when the adjustment piece 33 is inserted into one of the transverse grooves 32, rests on the bottom of the U-shaped groove 34 and is clamped laterally by the opposite edges of the groove 34.

[0045] Fig.7B shows the anti-slam device 20 without inserted adjustment piece 33 in one of the transverse grooves 32. Here the leaf spring has the maximum free length. Fig.7C shows the anti-slam device 20 with the adjustment piece inserted in the transverse groove 32 located nearest to the end of the leaf spring 30 that is connected to the support part 5. In inserted condition, the adjustment piece 33 is clamped between the leaf spring 30 and the support part 5. This means the leaf spring 30 has a smaller free length such that the slam resistance increases. Fig.7D shows the anti-slam device 20 with the adjustment piece 33 inserted in the other transverse groove 32 and the leaf spring has the shortest adjustable free length.

[0046] The present invention is by no means limited to the embodiments described as an example and shown in the drawings, but fittings according to the invention for a window with a fixed frame and a tiltable leaf can be realised in all kinds of forms and dimensions, without departing from the scope of the invention.

Claims

1. Fittings for a window with a fixed frame (24) and a tiltable leaf (23) around a horizontal axis, said fittings comprising

a support part (5) that can be fixedly attached in a relevant fitting groove (22) along an outer contour of the leaf

a glide piece (6) that is slideable relative to the support part,

a main arm (3) that at one end can be hingedly connected to the fixed frame and at the other end can be provided with a coupling pin (7) for a hinged connection to the glide piece (6), and

a support arm (4) that can be hingedly connected to the support part at one end and at the other end is hingedly connected to the main arm, whereby the fittings are configured such that, when in use, in the close position of the window, the main arm and the support arm are substantially parallel with the glide piece and the support part and in the open tilt position, the main arm and support arm form an angle relative to each other and relative to the support part and the glide piece, characterised in that

when in use, when moving the leaf from the close position to the open tilt position or vice versa the support part and the glide piece move relative to each other over a predefined stroke of the glide piece, and

the glide piece in longitudinal direction is provided at its upperside with several coupling openings (19) in which the coupling pin can be selectively applied for hingedly connecting the main arm with the glide piece, whereby the stroke of the glide piece and correspondingly, the tilt opening is determined depending on the coupling opening selected for the connection.

2. The fittings according to claim 1, characterised in that the coupling pin (7) is provided with a ring-shaped notch (25) and can be applied in the selected coupling opening (19), such that the coupling pin protrudes through a passage (28) of a locking element (26) of the glide piece (6), whereby the ring-shaped notch (25) of the coupling pin snaps into the edge of the locking element delimiting the passage (28).

3. The fittings according to claim 2, characterised in that the locking element (26) comprises several passages (28) and a plate-shaped section (27), in which the passages (28) are applied and that the glide piece (6) is provided at one side with a groove for fittingly inserting the plate-shaped section of the locking element such that the passages align with the corresponding coupling openings (19).

4. The fittings according to claim 3, characterised in that the locking element (26), for every passage (28) comprises a lip (35) that protrudes downwardly relative to the plate-shaped section (27) and at least partially overlaps with the passage.

5. The fittings according to claim 4, characterised in that the lip (35) forms an angle with the plate-shaped section (27) .

6. The fittings according to any one of the claims 3 to 5, characterised in that the plate-shaped section (27) of the locking element (26) is provided with a protrusion (29) complementary to a notch in the groove of the glide piece (6), configured such that in inserted condition of the locking element with the coupling pin (7) snapped into the locking element, the protrusion engages with the notch to lock the locking element.

7. The fittings according to claim 1, characterised in that the fittings are provided with an anti-slam device (20) comprising an oblong-shaped leaf spring (30), that at one end is connected to the support part (5) and extends freely lengthways beyond the support part in the direction of the glide piece (6), whereby in open tilt position of the window, the other end of the leaf spring snaps into the glide piece to prevent the window from slamming shut.

8. The fittings according to claim 7, characterised in that the leaf spring (30) is curved at its free end and in open tilt position snaps into a notch (21) provided at the underside of the glide piece (6) with its curved end.

9. The fittings according to claim 7 or 8, characterised in that the leaf spring (30) is provided with a double bend (31) near its free end.

10. The fittings according to any one of the claims 7 to 9, characterised in that the free length of the leaf spring (30) is adjustable.

11. The fittings according to claim 10, characterised in that the support part(5) at the upperside under the freely extending leaf spring (30) is provided with a transverse groove (32) over at least a substantial part of the width of the support part, in which an adjustment piece (33) can be fittingly inserted laterally, whereby the adjustment piece is clamped between the leaf spring and the support part (5) in inserted condition and as such decreases the free length of the leaf spring such that the slam resistance increases.

12. The fittings according to claim 11, characterised in that the support part (5) at the upperside under the freely extending leaf spring (30) is provided with several parallel transverse grooves (32) over at least a substantial part of the width of the support part (5) in which the adjustment piece (33) can selectively be fittingly inserted laterally, whereby in the selected transverse groove the adjustment piece in inserted condition is clamped between the leaf spring and the support part and as such the slam resistance is set.

13. The fittings according to claim 11 or 12, characterised in that the adjustment piece (33) is provided with a substantially U-shaped groove (34) on the side facing the leaf spring, when in use, configured such that in inserted condition the leaf spring rests on the bottom of the groove and is clamped laterally by the opposite edges of the U-shaped groove.

14. The fittings according to any one of the claims 7 to 13, characterised in that the support part (5) is provided with a threaded hole and the leaf spring (30) is provided with a screw passage through which a screw can be screwed in the threaded hole to connect the leaf spring with the support part.

Drawing