WO2007097694A1

WO2007097694A1 - Device for hanging windows, doors and the like

Info

Publication number: WO2007097694A1
Application number: PCT/SE2007/000160
Authority: WO
Inventors: Torbjörn STRAND
Original assignee: Assa Ab
Priority date: 2006-02-22
Filing date: 2007-02-22
Publication date: 2007-08-30
Also published as: SE529571C2; SE0600387L

Abstract

The present invention relates to a device for hanging windows, doors and the like which include a frame (100) and a casement sash (200) or the like that can be rotated about a generally vertical rotational axis. The device includes an upper guide (1) and a lower guide (8) which can be fixed respectively to the upper and the lower members of the frame, an upper slide (2) and a lower slide (9) which are guided for displacement along the upper and the lower guide respectively and which can be fixed to the casement sash for rotation about the generally vertical rotational axis, and an upper pivotal arm (5) and a lower pivotal arm (11) which can be ro- tatably fixed to the upper and lower frame members and to the casement sash respectively. The device is characterized by means (9f, 9g), (10d) for causing displacement of the casement sash along the generally vertical rotational axis when the casement sash is rotated about said axis.

Description

A DEVICE FOR HANGING WINDOWS, DOORS AND THE LIKE

Field of the invention

The present invention relates to device for hanging windows, doors and the like that can be rotated about a generally ver^¬ tical axis, as defined in the preamble of the accompanying main claim.

The invention also relates to a window that is provided with such a window hanging device.

Background of the invention

Rotatable or reversible windows are fitted to a large extent in dwellings and public buildings. In addition to enabling such windows to be opened for the purpose of airing a room, it is also possible to rotate the casement sash about a vertical or horizontal axis through an angle in the vicinity of 180°, so that the outer side of the window will face inwards. Among other things, this enables the outside of the window to be easily cleaned by a person positioned inwardly of the window.

A typical type of window is rotatable about a vertical axis. In order to enable such windows to be rotated, the axis about which the window rotates may be displaceable linearly along the upper and lower elements of the frame. The casement sash is herewith fastened to the frame with the aid of special window hanging devices which enable simultaneous rotation and displacement of the casement sash relative to the frame.

With this type of window it is preferred that the casement sash can be latched releasably in an open weathering position at a relatively small opening angle, for instance an opening through which small children are unable to pass. For safety reasons it is desirable that the latch which keeps the case^¬ ment sash in its weathering position will not give way even in response to large forces acting in an upward direction on the casement sash.

When closed, part of the casement sash is accommodated between the upper, lower and side elements of the frame. This results in a gap between this part of the casement sash and the frame, when the window is closed. Parts of the window hanging devices are normally placed in the gap. In order to protect the hanging devices and to counteract penetration of wind, water and foreign particles into the gap, the casement sash is normally provided with a surrounding covering flange which projects out upwardly, downwardly and laterally so as to cover the gap and a part of the frame members surrounding the gap. For reasons of an esthetical nature, among other things, it is desirable that the covering flange projects symmetrically out from the casement sash, i.e. by the same amount in all four directions, upwards, downwards and in both lateral directions.

The casement sash and the frame members may be comprised of e.g. wood or metal, such as aluminium. The frame and the casement sash may also be comprised of different material combinations. For example, the casement sash may comprise a wooden body on which a number of aluminium profiled elements have been fixed so as to form a covering flange around the body of the casement sash. The frame members may also comprise a wooden body on which, e.g., outwardly facing protec- tive aluminium strips are fixed.

It is preferred that the hanging devices can be fitted readily to the frame and to the casement sash. One particularly desirable attribute is that those parts of the hanging de- vices that are fastened to the casement sash and to the frame respectively can be fitted thereto before the casement sash is coupled together with the frame. In the production of win^¬ dows and the like, the frame members are normally produced and stored until the customized frame shall be assembled and delivered. In this regard, it may be desirable to enable the various parts of the hanging device to be fitted to respective frame members prior to the frame members being mutually joined to provide the finished frame.

It is also desirable that the hanging devices can be easily fitted to standard frames and casement sashes without requiring particular modification to the frames and sashes. It is, of course, also very important that the casement sashes and the frames are both durable and reliable. It is particularly important that the gap between the frame and the casement sash can be kept as small as possible, even when parts of the device are accommodated in the gap. For manufacturing/economical reasons with regard to said device and the fitted win- dow it is desirable that one and the same type and size of the device can be used in the fitting of windows of varying size .

SE 7504329-9 describes a reversible window where the casement sash is reversible about a vertical axis relative to the frame. The window includes upper and lower hinges which are located in the proximity of the vertical rebate edge of the casement sash and connected to a slide shoe that can be displaced along guides mounted on the horizontal frame members. Both ends of upper and lower hinge arms are rotatably mounted on the horizontal frame members and the casement sash respectively.

GB 2 182 702 describes a similar arrangement Summary of the invention

One object of the present invention is to provide an improved device for hanging windows, doors and the like, comprising a frame and a casement sash or the like that is reversibly ro- tatable about a generally vertical axis.

Another object of the invention is to provide such a device that can be readily fitted to frame and casement sash.

A further object of the present invention is to provide such a device that will allow the casement sash to be provided with a relatively long symmetrically protruding cover flange and which will ensure full reversibility and reliable func- tioning.

Another object of the present invention is to provide such a device which will allow those parts which are fixed to the frame to be fitted to respective frame members prior to join- ing together said members to form a frame.

These and other objects of the invention are achieved with a device of the kind defined in the preamble of claim 1 and having the special technical features set forth in the char- acterizing clause of the claim.

The inventive device thus includes means for displacement of the casement sash vertically when the sash is rotated about its axis of rotation. The present invention enables the cov- ering flange projecting out from the sash to project symmetrically to a relatively large extent. Because the casement sash and its covering flange are raised or lowered during rotation of the casement sash there is no danger of a lower or an upper part of the flange striking against or being hin- dered by parts that project from the lower frame member or the upper frame member respectively. Those parts of the de^¬ vice that are fixed to the upper frame member or to the lower frame member can, in particular, be given a significant height without hindering movement of the casement sash when rotating the sash to its reversed position. A significant advantage in this regard is that it is not necessary to recess the upper or lower guide of the device in respect to the frame member, even when the casement sash includes a symmet- rical covering flange that extends out through a relatively large distance.

Means for achieving vertical displacement of the casement sash are conveniently adapted to raise the sash as it is ro- tated from a closed to a reversed position. This provides a wide degree of freedom with regard to the design of the lower parts of the device, such as its lower guide. For example, these parts of the device can be given a relatively large height without the danger of hindering movement of the case- ment sash even when the covering flange projects out to a large extent. This is particularly beneficial, since it enables the guide to be given the form of a slide rail that projects up from the lower frame member with the slide arranged displaceable on the rail. This eliminates the danger of dust, dirt and other foreign particles entering and blocking an otherwise necessary outwardly open slide channel sunk in the lower frame member. Moreover, the lower guide can be given relatively robust dimensions, which is beneficial since the guide supports the full weight of the casement sash.

The means for achieving vertical displacement are conveniently formed so that the casement sash will be displaced when it is rotated through an angular range extending from about 60° to about 90° in relation to the closed position of the casement sash. This will ensure that sash displacement will take place before the corner of the covering flange disposed nearest the axis of rotation is moved in towards the guide and therewith risk coming into contact therewith. The risk of this displacement taking place too early is counter^¬ acted at the same time, so as to avoid vertical displacement of the casement sash being hindered by the upper pivot arm in the case of upward displacement of the sash, or by the lower pivot arm in the case of downward displacement of the sash.

The means for vertical displacement of the sash conveniently includes a first contact surface adjacent the lower slide and a second contact surface disposed adjacent the casement sash, wherein at least one of said contact surfaces extends obliquely relative to the vertical axis, and wherein said contact surfaces are adapted to move relative to one another and in mutual abutment when the casement sash is rotated relative to the lower slide. This results in a very simple robust and reliable construction which comprises only a few components.

The first contact surface is conveniently provided on a shoulder which projects upwards from the lower slide. The second contact surface is conveniently formed on a lower mounting part that can be fixed adjacent the sash. This reduces the number of components required in the device and facilitates mounting of the device.

The lower slide will conveniently include a trunnion which defines the generally vertical axis of rotation and which can be received in a cylindrical opening in the mounting part. A device of this design also reduces the number of components required while resulting in a simple and reliable construction. In order to enable the casement sash to be displaced verti^¬ cally in a direction towards the upper frame member, it is preferred that the upper slide is coupled to the casement sash with the aid of a resilient element. This enables the desired vertical displacement of the casement sash to be achieved while ensuring satisfactory guidance of the sash ro^¬ tation axis.

The inventive device will also conveniently include a hook mounted on the lower or the upper pivot arm and an engagement element, wherewith the hook and the engagement element are intended to mutually co-act in releasably holding the casement sash in a partially open weathering position and in a reversed cleaning position. This results in a combined weathering and cleaning latching means integrated with the hanging device, therewith obviating the need for separate parts and separate mounting steps for providing such latching means. The means for latching the casement sash in a weathering po- sition will conveniently include a resilient abutment which counteracts rotation of the casement sash towards a closed position in co-action with the hook. This results in a resilient latch which prevents the casement sash from being closed by the wind unintentionally. The latching means enable the casement sash to be closed intentionally, simply by drawing in the sash with a force that overcomes the spring force of the resilient latch. This embodiment of the invention thus affords latching functions in no less than three positions, namely a weathering position latching function, a cleaning position latching function and a function in which the casement sash is latched against being closed by the wind.

The hanging device will conveniently include an elongate profiled element that forms the lower guide and which includes an axially extending channel section for accommodating other parts of the hanging device. The lower slide may have the form of a slide way which supports against and is guided by the outer side of the axially extending channel section of the profiled element. The lower pivot arm is rotatably fixed to the profiled element and the engagement element and the abutment are received in the channel section. This results in a simple and reliable construction. The design also results in a construction with which only a single integrated mount- ing part need be affixed to the lower frame member. Mounting of the device to the lower frame member can thus be achieved very easily and may also be carried out before the lower frame member is connected to remaining frame members in order to form the frame .

By giving the upper guide the form of a second elongate profiled element to which the upper pivot arm is pivotally affixed there is obtained a single corresponding integrated upper mounting part for fixture to the upper frame member.

The invention also relates to a window that comprises a frame, a casement sash and a window hanging device according to the invention.

Brief description of the drawings

The invention will now be described with reference to exemplifying embodiments of the invention and with reference to the figures of the accompanying drawings, in which:

Figure 1 is a perspective view of a hanging device according to one embodiment of the invention and shows the device in a first mode. Figure 2 is a perspective view corresponding to the view of Figure 1, showing the hanging device in a second position.

Figure 3 is a perspective exploded view of a part of the hanging device shown in Figure 1.

Figure 4 is a partially cut away plan view of the part shown in Figure 3.

Figure 5 is a side view of a member of the part shown in Fig^¬ ure 3.

Figure 6 is a side view of another member shown in Figure 4.

Figures 7a and 7b are exploded views illustrating in perspective two mutually co-acting members included in the hanging device shown in Figure 1, with said members being shown in two different positions of rotation.

Figure 8a is a side view illustrating an upper part of a hanging device mounted to a window, with the casement sash being shown in a closed position.

Figure 8b is a side view of a member in the upper part of the Figure 8a illustration, in a larger scale.

Figure 8c is a side view of an upper part of a hanging device fitted to a window with the casement sash being shown in a partially open position and with the casement sash being shown in perspective.

Figure 9a is a perspective view with certain parts omitted and illustrating a part of the hanging device shown in Figure 1 fitted to a window with the casement sash shown located in a first position.

Figure 9b is a perspective view corresponding to that of Fig- ure 9a, with the casement sash shown in a second position.

Figure 9c is a perspective view taken at another angle with the frame removed and illustrating the position shown in Figure 9a.

Figure 9d is a perspective view taken at another angle and with the frame removed, and illustrating the position shown in Figure 9b.

Detailed description of embodiments at present preferred

Figures 1 and 2 illustrate a window or door hanging device according to the present invention in a first and a second position respectively. The device is fitted to a window that includes a frame 100 and a casement sash 200 (see Figures 8a and 9a) . The frame 100 and the casement sash 200 are comprised of wood and aluminium elements. The casement sash 200 includes a surrounding covering flange 201 which projects out upwardly, downwardly and in both lateral directions. The covering flange 201 projects out symmetrically in all directions over the gap which is formed between the casement sash 200 and the frame 100 when the window is closed. The frame is also provided with a protective strip 101 comprised of extruded aluminium.

The position illustrated in Figure 1 corresponds to a casement sash (not shown) that has been opened to an angle of about 30°. The position shown in Figure 2 corresponds to the casement sash having been opened through an angle of about 140°, so that the outside of the window faces obliquely inwards towards the frame .

The window hanging device shown in the figures includes an upper guide 1 or slide rail that is fixed to an upper hori^¬ zontal frame member not shown in Figures 1 and 2. The upper guide is comprised of an extruded aluminium profiled element which is accommodated in a grove or slot in the upper frame member. The guide includes a downwardly open grove in which an upper slide 2 (see Figure 8b) in the form of a slide shoe is axially displaceable . The slide 2 is pivotally coupled to a first mounting part 4 by means of an angle iron 3, said mounting part 4 being screwed to an upper corner of the casement sash. As will best be seen from Figure 8b, the pivot coupling between the angle iron 3 and the first upper mounting part 4 is in the form of a trunnion which is affixed in the mounting part 4 and extends through a circular through- penetrating hole and the angle iron 3. The upper end of the trunnion 4a is deformed so as to limit axial movement of the angle iron 3 relative to the trunnion 4a. Two arched cup springs 4b that include a central hole are disposed around the trunnion 4a between the angle iron 3 and the mounting part 4. The two cup springs are turned so that their convex surfaces will lie opposite one another.

An upper guide arm 5 has one end which is pivotally fixed to a holding plate 6 which is received in the grove of the upper guide 1 and fixed therein by compression deformation of the side walls of the grove. The other end of the upper guide arm is pivotally fixed to a second upper mounting part 7 which is received in a corresponding opening in the casement sash and fixed thereto by means of screws. The device also includes a lower guide 8 which is affixed to a horizontal lower frame member (not shown in Figures 1 or 2) with the aid of screws. As will best be seen from Figure 5, the lower guide 8 is comprised of an elongate extruded alu- minium profiled element. The profiled element has a step- shaped cross-section comprising a mounting base 8a which includes an upper step portion 8a' and a lower step portion 8a" . A forwardly open channel section 8b extends upwards from the lower step portion 8a" of the mounting base.

A lower slide 9 in the form of a slide shoe is axially dis- placeable on the lower guide 8. As will best be seen from Figure 6, the lower slide 9 includes a part which has the shape of an inverse U, and which partially embraces the chan- nel section 8b for guiding rectilinear movement of the slide 9 along the lower guide 8. The U-shaped part includes a longer downwardly projecting leg 9a which is received in an upwardly open grove formed by the profiled element of the guide 8 between the upwardly projecting channel section 8b and the upper step part 8a' of the mounting base 8a. A support flange 9b which projects inwardly from the U-shaped part (to the right in Figure 6) supports against the upper step part 8a' of the mounting base. The lower slide 9 also includes a trunnion 9c which projects up generally vertically and which defines the pivot axel of the casement sash. The upper free end of the trunnion is provided with a number of resilient or elastic tongues 9d whose free ends are provided with hook elements 9e .

The lower slide 9 further includes an upwardly projecting shoulder 9f that has two opposing inclined first contact surfaces 9g. The two contact surfaces are inclined at an angle of about 45° to the horizontal plane. The shoulder 9f is placed generally immediately above the U-shaped part of the lower slide and is thus located above the channel section 8b of the profiled element 8 when the side 8 is placed on and moves along the guide 8.

The inventive device also includes a first lower mounting part 10 which is received in a corresponding lower opening in the casement sash and screwed firmly thereto. As will best be seen from Figure 7a, the first lower mounting part 10 includes a cylindrical, through-penetrating opening 10a for re- ceiving the trunnion 9c. The cylindrical opening 10a is snapped firmly about the trunnion 9c with the aid of tongues 9e and hook elements 9e . The first lower mounting part 10 includes an upper abutment surface 10b and a lower abutment surface 10c, said abutment surfaces facing downwards. The two downwardly facing abutment surfaces 10b, 10c are joined by an inclined second contact surface 1Od which defines an angle of about 45° to said two abutment surfaces 10b, 10c.

Returning to Figures 1 and 2, the inventive hanging device also includes a lower pivot arm 11 whose one end is pivotally fixed to a lower holding plate 12 which is received in the channel section 8b of the lower guide 8 and fixed therein by compression deformation of the side walls of the channel section. As will best be seen from Figure 3, the holding plate 12 includes screw holes for firm fixation to the lower frame member outside the profiled element of the guide 8. The other end of the lower pivot arm 11 is pivotally fixed to a second lower mounting part 13 which is received in a corresponding opening in the casement sash and fixed therein with the aid of screws. To this end, the pivot arm 11 comprises a trunnion 11a which can be snapped firmly into a corresponding cylindrical, through-penetrating, opening in the second lower mounting part 13. As shown in Figure 3 and 4 the lower pivot arm includes a hook lib which projects out towards the lower guide 8. As will best be seen from Figure 4, the hook lib is adapted for co-action with a first engagement element 21 and a second element 31 which are arranged axially displaceable in the channel section 8b of the lower guide 8.

The first engagement element 21 is coupled to an operating device 25 by means of an operating rod 24 accommodated in the channel section. The operating device 25 is moveable axially in relation to the guide and projects out through a longitudinally extending opening that faces outwards from the channel section 8b. The first engagement element 21 is pressed towards the hook by means of a pressure spring 22 which is supported against a generally U-shaped element 23 which supports against a slot (not shown) in the profiled element of the guide 8 through the medium of an outwardly folded flap. The operating rod 24 extends through a through-passing opening in the U-shaped element 23.

The second engagement element 31 is pressed in a direction towards the hook lib by a pressure spring 33 that is supported against a part of the holding plate 12 received in the channel section 8b. The second engagement element 31 is con- nected with a pull rod 32 which is limited for axial movement relative to the guide 8 by virtue of having a bent end which co-acts with an opening 12a in the part of the holding plate 12 received in the channel section 8b.

As will best be seen from Figure 4, the holding plate 12 with the lower pivot arm 11 and all elements 21 - 25 and 31 - 33 are disposed in and held firmly by the lower guide. These elements or parts thus form a unit which can be readily fitted to the lower frame member, even prior to the lower frame member being joined to other frame members so as to form a frame .

The window hanging device in the example shown in Figures 1 and 2 also includes a so-called back edge safety element.

This element includes an abutment 41 which has an engagement opening and which is affixed to one side member of the frame. An engagement pin 42 which co-acts with the abutment 41 is affixed to the casement sash. When in a closed position, the engagement pin 42 engages the opening in the abutment 41 so as to make forcing of the window difficult to achieve.

As will be evident from the above description, the inventive window hanging device can be readily fitted to the frame and to the window. The upper frame part of the device that includes the upper guide 1 and the upper pivot arm 5 fastened thereto form an integral unit which can readily be screwed securely to the upper frame member. This integral unit can be fitted both prior to and subsequent to assembling the frame. Moreover, the first upper mounting part 4 and the second upper mounting part 7 can be readily fitted to the upper member of the casement sash. If so desired, said mounting parts can be fitted prior to assembling the sash.

The lower frame part of the hanging device which includes the lower guide 8 and the lower pivot arm 11 affixed thereto and the elements accommodated in the channel section 8b also form an integral unit that can be readily mounted on a lower frame member either prior to or subsequent to assembly of the frame. The first lower mounting part 10 and the second lower mounting part 13 are readily mounted by screwing said mounting parts to the lower member of the casement sash, either before or after assembly of the sash. When the hanging device has been fitted to the frame and to the casement sash respectively in the manner described, the casement sash can be easily fitted to the frame by lifting the lower slide 9, which is securely snapped to the first mounting part 10, onto the channel section 8b of the lower guide 8, and then moving the upper slide 2 into the grove in the upper guide 1. This being possible due to the elasticity of the cup springs 4b which allows the angle iron 3 to be inclined. Finally, the second upper mounting part 7 and the second lower mounting part 13 can be brought into engagement with corresponding engagement pins 5a, 11a on the upper pivot arm 5 and the lower pivot arm 11 respectively. This is carried out when the casement sash is in an open position, wherewith the elasticity or resilience of the pivot arms 5, 11 enables the arms to be flexed apart slightly so that the second mounting parts 7, 13 can be brought into engagement with the pins 5a, 11a of the pivot arms.

When the casement sash is fully closed, the weight of the casement sash is transferred from the first lower mounting part 10 to the lower guide 8 and therewith to the lower frame member by virtue of the upper contact surface 10b of the first lower mounting part 10 lying in abutment with the upper side of the outwardly projecting shoulder 9f on the lower slide 9. When the casement sash is rotated from a closed to an open position, the lower corner 21a (see Figure 9d) of the covering flange 201 of the casement sash located in the vicinity of the lower slide 10 is rotated towards and over the lower guide 8 and the lower slide 10. When the angle of rota- tion is in the region of 60°, the inclined contact surface 1Od on the mounting part 10 will come into contact with the corresponding inclined contact surface 9g on the shoulder 9g on the lower slide 9 (Figures 7b, 9a) . During continued rotation of the casement sash, the contact surface 1Od will slide up on the contact surface 9g therewith lifting the mounting part 10 and the entire casement sash through a distance that corresponds to the vertical distance between the upper abutment surface 10b and the lower abutment surface 10c on the mounting part 10 (Figure 9b) . This distance may vary depending on the extent to which the covering flange 201 projects out. In the case of the illustrated embodiment, the distance is about 3 mm, meaning that the casement sash will be lifted through a distance of 3 mm during said rotation. Further ro- tation will cause the abutment surface 10c on the mounting part 10 to be brought into abutment with the upper side of the shoulder 9 (Figures 9c, 9d) , wherewith further rotation takes place in the raised position of the casement sash. This raising of the casement sash is sufficient for the corner 201 of the covering flange to pass free from the lower guide 8 and the lower slide 9.

As illustrated in Figure 4, the hook lib will come into engagement with the spring-loaded first engagement element 21 subsequent to rotation from a closed position through an angle of about 20°. This latches the casement sash in a child- safe weathering position. In this position of the casement sash, the second engagement element 31 is also biased towards the side of the hook that faces away from the first engage- ment element. This spring-loaded abutment prevents the casement sash being closed or rotated towards a closed position, for instance in response to a gust of wind. The second engagement element thus effectively prevents a window that is open in a weathering position being blown shut by the wind. When wishing to close the window from this weathering position, it is sufficient to pull the casement sash closed with a force that overcomes the spring force of the pressure spring 33. The window can thus be closed from said weathering position without needing to release any latching elements or the like.

However, if the window is to be opened further from its weathering position, it is necessary to release the window manually. Movement of the operating device 25 sideways to the right in Figure 4 causes the first engagement element 21 to release its engagement with the hook lib. This allows the open casement sash to be opened outwards still further. The manoeuvring element 25 can be easily reached ergonomically, and is placed in a child-safe position adjacent the lower frame member outside the lower guide 8. When the casement sash is opened still further, beyond a fully opened position at an opening angle of 90°, the outside of the window will be turned to face inwardly. When rotation of the window is continued towards a fully reversed position, the hook 11 will again engage the first engagement element 21 and the second engagement element 31, wherewith the casement sash takes a latched window cleaning position. Latching of the window in this cleaning position is identical with latching of the window in said weathering position. This facilitates cleaning of the outside of the window which now faces inwardly, since the casement sash will not move outwards even when the window is cleaned in a "heavy handed fashion" . Moreover, with the win- dow in this position it cannot be blown shut by the wind, therewith reducing the risk of pinching the hands or fingers during cleaning of the window. Latching of the window in its cleaning position is also released in the same way as that described above with respect to the weathering position, whereafter the casement sash can be rotated back to the weathering position, or its closed position or to any open position whatsoever. The invention has been described above and illustrated with respect to an exemplifying embodiment thereof. It will be understood, however, that the invention is not restricted to the embodiments described above and that alterations and modifications can be made freely within the scope of the accompanying claims.

Claims

1. A device for hanging windows, doors and the like which include a frame (100) and a casement sash (200) or the like that can be reversibly rotated about a generally vertical ro- tational axis, wherein the device includes an upper guide (1) and a lower guide (8) which can be fixed respectively to the upper and lower frame members; an upper slide (2) and a lower slide (9) which are guided for displacement along the upper and the lower guide respectively and which can be fixed to the casement sash for rotation about the generally vertical rotational axis; and an upper pivot arm (5) and a lower pivot arm (11) which can be pivotally fixed to the upper and lower members of the frame and to the casement sash respectively, characterized by means (9f , 9g) , 1Od) for displacement of the casement sash along the generally vertical rotational axis when the casement sash is rotated about said axis.

2. A device according to claim 1, in which the means (9f, 1Og) , 1Od) for achieving vertical displacement of the case- ment sash are adapted to raise the casement sash in relation to the frame during rotation of the casement sash from a closed to a reversed position.

3. A device according to any one of claims 1 or 2 , in which the vertical displacement means (9f , 9g) , 1Od) are adapted to achieve said displacement when the casement sash is rotated through an angular range from about 60° to about 90° in relation to the closed position of the casement sash relative to the frame.

4. A device according to any one of claims 1 - 3, in which the means for vertical displacement of the casement sash comprise a first contact surface (9g) adjacent the lower slide

(9) and a second contact surface (1Od) disposed adjacent the casement sash, wherein at least one of said contact surfaces is inclined relative to the vertical axis and wherein the contact surfaces are adapted to be displaced in mutual abutment relative to one another when the casement sash is ro- tated relative to the lower slide.

5. A device according to claim 4, in which the first contact surface (9g) is provided on a shoulder (9f) which projects up from the lower slide (9) .

6. A device according to any one of claims 4 - 5, comprising a lower mounting part (10) which can be fixed to the casement sash and which includes the second contact surface (19d) .

7. A device according to claim 6, in which the lower slide (9) includes a trunnion (19c) which defines the generally- vertical axis of rotation and which can be received in a cylindrical opening (10a) in the mounting part (10) .

8. A device according to any one of claims 1 - 7, comprising a resilient element (4a) with which the upper slide (2) is coupled to the casement sash in order to allow the casement sash to be displaced vertically in a direction towards the upper frame member.

9. A device according to any one of claims 1 - 8, comprising a hook (lla) mounted on the lower pivot arm or on the upper pivot arm and a first engagement element (21) , wherein the hook and the engagement element are adapted to releasably hold the casement sash in a partially opened weathering position and in a reversed cleaning position in mutual co-action with one another.

10. A device according to claim 9, comprising a second engagement element (31) which is adapted to counteract rotation of the casement sash from said weathering position towards a closed position in co-action with the hook (11) .

11. A device according to any one of claims 1 - 10, comprising an elongate profiled element which forms the lower guide and which can be affixed to the lower member of the frame and which includes an axial channel section (8b) for receiving other device components (12 , 21 - 25, 31 - 33) .

12. A device according to claim 11, in which the lower slide (9) has the form of a slide shoe which is supported against and guided by the outside of the axial channel sec- tion (8b) of the profiled element.

13. A device according to any one of claims 10 - 12, in which the lower pivot arm (11) is pivotally affixed to the profiled element and wherein the first engagement element (21) and the second engagement element (31) are accommodated in the channel section (8b) .

14. A device according to any one of claims 1 - 13, in which the upper guide (1) has the form of a second elongate profiled element in which the upper pivot arm (5) is pivotally mounted.

15. A window comprising a frame (100), a casement sash (200) and a window hanging device according to any one of claims 1 - 14.