EA037808B1 - Roof window with a primary frame and at least one secondary frame, method for installing such a roof window and method for dismantling a secondary frame of the roof window - Google Patents

Abstract

A roof window has a primary frame (1) and one or more secondary frames (2, 3), such as a sash (2) and an intermediate frame (3). A lifting device (10) includes a lifting arm (14) inserted between the primary frame (1) and the secondary frame (2, 3), the lifting arm (14) having a first end (12) rotatably connected with a sledge system (30) slidably connected with the primary frame (1) in a sledge guidance (16) and a second end (13) rotatably connected with the secondary frame (3).The lifting device (10) furthermore includes a spring assembly (20) configured to be coupled to the sledge system (30) and in turn the first end (12) of the lifting arm (14) by means of a coupling mechanism, such that the spring assembly (20) is able to assume an uncoupled condition and a coupled condition relative to the sledge system (30). The coupling mechanism comprises a first coupling member (21) associated with the spring assembly (20) and adapted to cooperate with a second coupling member (31) associated with the sledge system (30).The first coupling member includes a hook element (21) and the second coupling member includes receiving means (31) formed in the sledge system (30) and configured to cooperate with said hook element (21) in the coupled condition. The hook element (21) is configured to assume at least a non-engagement position and an engagement position, and the coupling mechanism furthermore comprises a coupling plate (25) arranged to assume at least a first position corresponding to the coupled condition and a second position corresponding to the uncoupled condition, the coupling plate (25) allowing the hook element (21) to assume the non-engagement position.

Description

Scope of invention

The present invention relates to a dormer window, in particular for installation on an inclined (sloping) roof surface, comprising a primary frame, at least one secondary frame such as a sash and / or an intermediate frame, and a lifting device comprising a lifting arm inserted between a primary frame and this at least one secondary frame, wherein the first end of the lifting arm is rotatably connected to a sled system slidably connected to the primary frame for guiding it, and the second end is rotatably connected to the at least one secondary frame, the lifting device further comprises a spring assembly configured to be connected to the sled system and to the first end of the lifting arm by means of a connecting mechanism so that the spring assembly can come into an unconnected state and a connected state relative to the sled system; the connecting mechanism includes a first connecting element associated with the spring assembly and configured to cooperate with a second connecting element associated with the sled system; and the first connecting element comprises a hook element, and the second connecting element comprises receiving means formed in the sled system and configured to interact with the hook element in a connected state, or vice versa, the hook element is configured to assume an unlocked position and an engaged position. In addition, the invention relates to a method for installing such a dormer and to a method for removing the secondary frame of such a dormer.

Prior art

Sloped roof windows include pivot-type windows articulated at the center or near the center, top-hung windows, and finally dormer windows, which are top-hung during normal operation, but which can be rotated for cleaning. Examples of top-hung windows that pivot for cleaning are described, for example, in WO-A-8910460, EP 0733146 B1, EP 1873323 B1 and EP 2762655 A2 by the same applicant. In order to be able to rotate the window sash by approximately 180 ° to a position convenient for cleaning, the sash structure is connected to the intermediate frame by frame levers, which in the closed position of the window are located between the upper pairs of the side frame and sash elements, and which, during normal operation of the window as top-hung the windows repeat the side elements of the sash.

In dormer windows, in which work occurs either entirely or partially around the axis of the upper hinge, as is known, at least part of the weight of the movable components is balanced by means of a lifting device inserted between a pair of corresponding side members of the stationary frame and the sash, respectively, where one end the lifting arm is pivotally connected to one of the side elements, and the other end is pivotally connected to a sliding shoe moving along the other side element, while the shoe is pressed by a tension spring in such a direction that an outward force is applied to the flap through the lever. The purpose of this design is to facilitate the opening of the window, and the dimensions can be adjusted so that the spring holds the top-hung window in balance in the desired open position.

The connection and disconnection of a spring assembly in such a window is known, for example, from EP 0081333 B1, where one end of the sash lifting lever has at least two pivot points located at different distances from the pivot point at the other end of the lever, and located so as to sequentially enter in action during the opening of the window and consistently increase the effective length of the lever. Another solution is given in WO 89/010460 A1, which describes a sliding shoe and a pre-stressed spring provided with a connecting means adapted to engage with each other during window installation. This connecting means comprises a tie connected to one end of the spring and to a connecting element at the other end. The connecting element is in engagement with the receiving hole in the sliding shoe by means of a transverse pin. However, such a window requires the installer to lift during installation and remove the entire weight of the sash with one hand, while the other hand is in a potentially dangerous place between the sash and the frame. In addition, window sashes are becoming heavier as modern sashes receive additional elements that expand their functionality, and an increase in insulating properties requires more materials included in the construction of frames, glazing and sashes.

In view of the above, the problem arises of creating a connecting mechanism for the spring assembly and the sled system that would meet the current load requirements, while at the same time providing an intuitive and easy to perform simplified installation and removal of the dormer.

Brief description of the invention

Thus, it is an object of the present invention to provide a dormer in which the secondary frame is easy to install and remove.

This objective is achieved by means of a dormer of the type described in the introduction, which is furthermore characterized in that the connecting mechanism further comprises a connecting plate for occupying at least a first position corresponding to a connected state and a second position, corresponding to the disconnected state, while the connecting

- 1 037808 the plate allows the hook element to take such a disconnected position.

Thus, it is possible to connect and disconnect the spring assembly and the sled system by manually setting the connecting plate to the selected position and opening and closing the flap to either unhook or engage the first connecting element. The connecting plate remains in the selected position until it is reactivated, which allows the sash and / or intermediate frame to be installed or removed in the stationary frame, since the first connecting element is disconnected from the sled system and therefore the force of the spring assembly does not interfere.

It should be noted that although the first connecting member is shown and described as a hook member formed on a first connector associated with the spring assembly, and the second connecting member is described as receiving means formed in a sled system, the hook member may not be formed or in a sled system. and the spring assembly may have a receiving means. In addition, in the context of the present application, the terms hook element and receiving means are to be interpreted as including other suitable types of female gripping type connectors.

In a presently preferred embodiment, the hook element of the first connecting element has at least one hook facing the sled system. This offers advantages, in particular from an installation point of view.

In another presently preferred embodiment, the hook element of the first link is disposed to slide in contact with the sled system in one direction and to engage with the second link in a second direction. In addition to being easy to install and remove, it also ensures logical operation.

According to a second aspect of the invention, a method for installing a dormer is provided.

According to a third aspect of the invention, there is provided a method for removing a secondary dormer frame.

Other preferred embodiments of the invention are defined in the dependent claims.

Brief Description of Drawings

The invention will now be described in more detail with reference to the accompanying drawings, where FIG. 1 is an isometric view of the dormer window in the open position as viewed from the inside;

fig. 2 is an isometric view of parts of a dormer with a lifting device in the first embodiment of the invention and corresponding to the open position of the window of FIG. one;

fig. 3 is an isometric view of details of the dormer of FIG. 2 in the closed position of the window;

fig. 4 is a partially exploded view of the details of FIG. 3;

fig. 5 is an isometric view of the spring assembly shown in FIG. 3;

fig. 6 is an enlarged partial isometric view of the spring assembly of FIG. five;

fig. 7 is a partially exploded isometric view of some of the elements of FIG. 6;

fig. 8a-8e are isometric views of elements of FIG. 7;

fig. 9a is a partial isometric view on an enlarged scale of the details shown in FIG. 3;

fig. 9b is an exploded, partial isometric view of parts of a lifting device according to another embodiment of the invention;

fig. 10 and 11 are partial isometric views of parts of a lifting device for a skylight in a second embodiment of the invention;

fig. 12a-12h are schematic partial side views of an embodiment of a dormer according to the present invention during attachment and detachment of a lifting device;

fig. 13a-13b, 14a-14b and 15a-15b are perspective views of details of a dormer according to a second embodiment of the invention;

fig. 16 is a schematic isometric view of details of a dormer according to another embodiment of the invention;

fig. 17 is a schematic side view of details of a dormer according to another embodiment of the invention;

fig. 18a-18e are views corresponding to those of FIGS. 8a-8e, respectively, details of the dormer window according to the third embodiment;

fig. 19a-19b are views corresponding to those of FIGS. 13a-13b, respectively, details of the dormer window according to the third embodiment;

fig. 20a is a view corresponding to view 14a of details of the dormer window according to the third embodiment;

fig. 20b is a partial isometric view of details of a dormer according to a third embodiment; and FIG. 21-24 are partial or complete, exploded or sectional views of parts of a dormer in one embodiment of the invention.

Description of options

FIG. 1 shows the general configuration of a top-hinged dormer in normal operation and which is rotated for cleaning. Such a window is described and shown in more detail in EP 0733146 B1 by the same applicant, the contents of which are hereby incorporated by reference. FIG. 1, the lifting device is designated 10, which, as shown in FIG. 2-9 is part of a first embodiment of a dormer according to the present invention.

- 2 037808

The dormer contains a primary frame in the form of a stationary frame 1, made with the possibility of installation on an inclined roof. Connected to the stationary frame 1 is at least one secondary frame, in the shown embodiment a first secondary frame in the form of a sash 2 supporting glass 4 and a second secondary frame in the form of an intermediate frame 3. The intermediate frame 3 is attached to the stationary frame by an upper connecting part 5, and the sash 2 is suspended in the upper part of the dormer through an intermediate frame 3 on a stationary frame so that during normal operation the dormer is top-hung. The sash 2 is also pivotally connected to the intermediate frame 3 so that the sash 2 can pivot to access the space behind the glass 4, for example for cleaning. For this, the intermediate frame 3 has a hinge 6 of the hinge joint. Although not shown in detail, it will be understood by those skilled in the art that the flap 2 has a mating hinge hinge.

The lifting device 10 consists of a spring assembly 20 and a sled system 30 which cooperate to open the window, i. E. for translating the intermediate frame or frames into an inclined position relative to the primary frame. Here, from the closed position, the user acts on the handle-shaped window drive 7 on the lower element of the sash 2. The force of the spring assembly 20 of the lifting device 10 acts on the lifting arm 14 inserted between the stationary frame 1 and the intermediate frame 3. In turn, the lifting arm 14 applies a moment to the intermediate frame 3 and therefore to the sash relative to the axis passing through the pivot pin 11. In combination with the force applied by the user to the handle 7, transmitted through the lifting moment, the moment created by the weight of the sash 2 with the glass 4 is overcome. Closing the window from the open position entails opposite movements of the sash 2 and the corresponding parts of the lifting device 10. The same lifting devices can be installed on each side of the dormer. Finally, the dormer has a ventilation device 8 that allows air to pass through in the closed position of the window.

In more detail, the lift arm 14 has a first end 12 rotatably coupled to a carriage system 30, which in turn is slidably coupled to a primary frame 1 in a carriage rail 16, and a second end 13 rotatably coupled at least with one secondary frame 3, the lifting device 10 further comprising a spring assembly 20 adapted to be connected to a sled system 30. Since the sled system 30 is connected to the lift arm 14, the spring assembly 20 is in turn configured to be coupled to the first end 12 of the lift arm 14 by a coupling mechanism, which will be described in more detail below, so that the spring assembly 20 can assume an unconnected state and connected. condition with respect to the system of 30 sleds.

FIG. 5 and 6 show the main components of the spring assembly 20 for the dormer. Other details and advantages of the spring assembly 20 are the subject of a parallel patent application filed concurrently with this application and are shown for information only in FIGS. 21-24. However, the present invention is applicable to any type of spring assembly. Thus, the main components of the spring unit are the buffer spring system 28, which acts as an auxiliary system for the main spring system 29. To adapt the same spring unit to different roof slopes, there is an adjustment means in the form of a movable adjustment plate 26, which is placed in one of the holes 27a in the spring casing 27, in which the buffer spring system 28 is located.

As shown in the drawing, the buffer spring system 28 includes an outer spring 281 and an inner spring 282 having substantially the same predetermined length. This predetermined length of the springs 281, 282 is typically selected in accordance with the dimensions of the other parts of the lifting device. When mounted, the inner spring 282 is positioned within the outer spring 281 so that the axes of the respective springs are substantially aligned.

In the illustrated embodiment, the outer spring 281 and the inner spring 282 of the buffer spring system 28 have different moduli, and the outer spring 281 and the inner spring 282 have opposite coil directions.

The spring assembly 20 further comprises at least one spring plug 283, 284 adapted to contact the corresponding end of the inner spring 282 of the buffer spring system 28 in the assembled state. That is, here the two spring plugs 283, 284 form the respective ends of the buffer spring system 28. At the manufacturing stage, it is useful to provide the spring plugs 283, 284 with means that increase friction on the surface intended to contact the corresponding end of the inner spring 282 of the buffer system 28. Thus, the two springs are held together securely.

In accordance with the present invention and with reference to the schematic views of FIGS. 2a-12e showing the connecting and disconnecting steps, the connecting mechanism comprises a first connecting element 21 associated with a spring assembly 21, as most clearly shown in FIG. 6.

The first connecting element 21 is adapted to cooperate with a second connecting element associated with the sled system 30. In the first, second and third embodiments shown in FIG. 10-11, 13a-15b and 18a-20b, the second connecting element comprises a slide 31, which is part of the slide system 30, and the slide 31 comprises a receiving means adapted to cooperate in a connected state with the first connecting element 21.

In all embodiments shown, the first connecting element comprises a hook element 21 for engaging with a second connecting element comprising a receiving means formed in the sled system 30. The hook element 21 is configured to assume at least an unlocked position and an engaged position, and the connecting mechanism further comprises a connecting plate 25 configured to assume at least a first position corresponding to a connected state and a second position corresponding to a disconnected state, whereby the connecting plate 25 allows the hook element 21 to assume this unlocked position. The operation of the presently preferred embodiments will be described in more detail with reference to FIGS. 12a-12h.

In the embodiment shown, the hook element 21 of the first connecting element has at least one hook portion 214 facing the sled system 30. This provides a particularly easy and safe connection procedure.

Although the connecting mechanism can only work well with one pair of hook and receptacle, preferably the hook element 21, as shown in FIG. 8d is U-shaped with a base plate 212 and two flanges 213, and each flange 213 has one hook 214.

Moving on to the exploded view shown in FIG. 7 and detailed individual views in FIG. 8a-8e, the brace 22 of the spring assembly 20 comprises a bar 221 extending substantially along the length of the spring assembly 20 and a head 222 facing the hook element 21, the brace 22 having at least one ramp 223, 224 at the transition between head 222 and rod 221.

In the first embodiment, the hook element 21 of the first connecting element includes an opening 211 in the base 22 through which the tie 22 can pass so that the head 222 of the tie 22 is held in a U-shaped bracket on the front of the base plate 212 and the rod 221 is at the rear.

The connecting plate 25 of the connecting mechanism has a base 252, which in the assembled state is located behind the base 212 of the hook element 21, i.e. opposite to the sled system 30, and has an elongated opening 251 allowing the rod 221 of the tie rod 22 to pass, while the connecting plate 25 is made to slide in the plane of the base 252, substantially perpendicular to the rod 221 so that when it is in the lower position, the hook 21 can take the engaged position, and in the upper position the hook 21 is held in the unlocked position.

In addition, the connecting plate 25 is here provided with a bottom flange 253 formed on the base 252 for abutting at least one inclined portion 223 in an unlocked position through the base plate 212. In the embodiment shown, this effectively holds the hook element 21 in an unlocked position.

The connecting plate 25 has a recess 254 located on top of the base 252 to form at least one, preferably two, upwardly projecting tabs 255. This facilitates the use of tools and re-engagement. In addition, the cutout 254 allows for the placement of reinforcing or stiffening elements for the sash.

In principle, the configuration of the connection between the first connecting element and the spring assembly 20 can be of any suitable shape as long as it meets the requirements, since relatively large forces arise here. The rigid structure, as in this embodiment, comprises a corner element 23 located adjacent to the head 222 of the tie 22, in which the opening 231 is formed, for the passage of the rod 221 of the tie 22.

Here, in addition, there is a tip 24 having an opening 241 for the passage of the rod 221 of the tie 22, the tip 24 having an upwardly extending wall 242 on which a protrusion 243 is formed, surrounding the opening 241 in the tip 24, and on both sides of the upwardly extending wall 242 two protruding flanges 244 are provided to define a track 245.

As shown in the drawings, the corner element 23 has an upwardly projecting leg 232 and a bottom leg 233, with an opening 231 in the corner element 23 in an upwardly extending leg 232, and parallel to the bottom leg 233 there are two projecting flanges 234, each of which defines a gap 235 with respect to the upwardly extending shelf 232.

When assembled, ferrule 24 is positioned such that the rear side of its upwardly extending wall 242 abuts the front side of the upwardly extending wall 232 of the corner element 23 between the bottom flange 233 and the protruding flanges 234, while the base 252 of the connecting plate 25 is slidably inserted into the track 245 tip and into the corresponding clearances of the corner element 23.

To ensure smooth movement during the joining procedure, each flange 213 of the U-shaped hook element 21 comprises a top 210 at the front end, a rounded transition 215 between the top 210 and the hook 214, a lower edge 218 passing between the hook 214 and the base plate 212, the opposite a top portion 217; and at least one ramp edge portion 216, 219 located between the top portion 217 and apex 210.

- 4 037808

In a third embodiment, the components of the coupling mechanism shown in FIG. 18a-18e have substantially the same configuration as the components in FIG. 8a-8e. In the shown embodiment, there are the following differences, which can be individually or in combination. The hook element 21 has two grooves 217a in the upper portion 217 for optional additional guidance. The protruding flanges 244 of the tip 24 have a corresponding rib 244a and two folded flanges 246 on the side facing the spring assembly 20. The angle piece 23 has enlarged orifice portions 231a adjacent the hole 231 to make room for the folded flanges 246. Thus, lightness is achieved. assembly and reliable retention during operation. Finally, the link plate 25 includes friction-increasing regions 256, for example, in the form of a corrugation or otherwise treated surface to increase friction and enhance the retention of the link plate 25 in a desired position. Corresponding frictional areas can be provided on the opposite side of base 252. The frictional areas can be formed as separate elements, such as a film or the like, applied to the base 252. The components of the coupling mechanism should be sized appropriately in relation to each other in order to avoid excessive frictional forces, but at the same time ensure correct operation.

Additional details of the sled system 30 are shown in second and third embodiments in FIGS. 10-11, 13a-15b and 18a-20b. Elements performing the same or similar functions as in the first embodiment are designated with the same reference numbers. Only the differences from the first option are described in detail below.

As shown in particular in FIG. 10-11, 13a-13b and 15a, the sled 31 of the sled system 30 comprises a lower portion 310, a first wall 311 and a second wall 312, at each of the transitions between the first wall 311 and the lower portion 310 and between the second wall 312 and the lower portion 310 preferably has one receiving opening 314, with the first wall 311 having the opening 315 and the second wall 312 having the opening 316 for receiving the axle 40 connected to the first end 12 of the lift arm 14. Finally, the slide 31 has a second opening 318 and a cutout 319, making room for other parts of the lifting device 10.

In the third version of the dormer shown in FIG. 19a-19b, the slide 31 is made longer than the slide according to the first and second variants. This gives the slide 31 more strength. As a consequence, the cutout 319 is made longer.

In the presently preferred embodiments described herein, the receiving means of the second connector comprises at least one receiving opening 314 in the slide 31 of the slide system 30. The second connecting element can also have other shapes. One possible alternative solution would be to use the axis 40 as the receiving means. This alternative solution is shown in FIG. 17.

Other parts of the axle 40 shown in FIG. 15a-15b, 16 and 20b are for information only and are the subject of a parallel patent application by the same applicant filed concurrently with this application.

As such, the components of the lifting device are subjected to high loads, in particular in large skylights and at low slopes of the roof slope. In these applications, the required lifting capacity of the lifting device can be up to 500 Nm. Loads of this magnitude not only impose stringent requirements on the components, but also require high performance from the spring assembly.

In addition to the aspects covered by this application, precautions have also been taken to reduce the harmful effect of loading on the upper hinge pin 11 and the upper support attachment 15. To ensure that the upper hinge finger 11 can always be safely inserted into the upper support attachment 15, the finger 11 of the upper hinge is formed with a head and, moreover, its rotation is blocked. In order to transfer the load on the upper hinge pin 11 by the flap through the intermediate frame to the upper support 15, this upper intermediate fastener 15 is provided with projections (similarly not shown).

In order to more accurately control the frictional forces during the movement of the sled system 30 in the sled guide 16, the sled system 30 in the illustrated embodiments comprises a slider 32, shown in particular in FIGS. 10-11, 14a-14b and 20a-20b, adapted to receive the slide 31 and comprising at least one opening 324 opposite the corresponding receiving opening 314 of the slide 31 of the second connecting element. Other details of slider 32 are provided for information only, and these details are the subject of a parallel application by the same applicant filed concurrently with this application.

It should be noted that the present invention is applicable to sled systems that do not have a slider or have a different slider configuration. In the illustrated embodiment, the slider 32 is formed of a plastic material, such as polyformaldehyde, which can also be coated with a coating such as Teflon® or other that acts as a lubricant to reduce friction.

The constriction 313 on the slider 32 is intended to free up space. By forming the slider narrower on one side, you can make the recess 322a thicker, and on the side where the wall 322 is located, the tolerances are satisfied, since the axis 40 is guided so that its end 402 does not protrude and does not lead to wear of the sidewall of the guide ...

Edge 328 is cut out to make room for other details of the assembly. The flange 329 scrapes the rail to, for example, slide the dirt accumulated on the rail of the slide towards the sides of the rail.

In principle, the coupling mechanism can be designed in any suitable way and operated accordingly, provided that the fundamental requirements outlined at the beginning are met. As will be understood from the following description of the operating steps performed during the connection and disconnection of the spring assembly 20 and the sled system 30 in the embodiments shown and described above with reference to FIGS. 12a-12h, the hook element 21 of the first connecting element, in presently preferred embodiments, is disposed for sliding contact with the sled system 30 in one direction and with the ability to engage with the second connecting element, in the shown embodiments, with the sled 31, in the other direction, and it is in the forced movement in the opposite direction to engage the components of the lifting device itself with the first and second connecting elements. For ease of reading, not all of the elements in FIG. 12-12h are designated by reference numerals and are described in detail above and in other figures.

FIG. 12a shows the dormer in a closed state, i. E. the secondary frame or frames lie substantially parallel to the primary frame. Here, the intermediate frame 3 represents the secondary frames, and the position of the slide guide 16 and the spring assembly 20 indicates the corresponding position of the stationary frame 1, although not shown, i. E. here, for simplicity, it is positioned substantially horizontally, although the stationary frame 1 is most often mounted on an inclined roof surface, before the spring assembly 20 is connected to the sled system 30. The linkage mechanism is not yet active and the sled system 30 is therefore located at a distance from the spring assembly 20. From the enlarged view of FIG. 12a, it is obvious that the connecting plate 25 is in its first, i.e. lower, a position that corresponds to the engagement position of the hook element 21, in which connection is possible.

When the window is opened by pivoting the intermediate frame 3 around the top hinge pin 11, the lift arm 14 also pivots and the sled system 30 moves towards the spring assembly 20 and its associated first hook element 21 connector. When approaching the position shown in FIG. 12b, the hook member 21 slides up the slide 31 and may pivot slightly on the tie 22 as the base plate 212 of the hook member 21 can move relative to the ramp 223 on the back of the head 222. The link plate 25 is still in the first, lower position. As the movement continues in the direction of opening of the intermediate frame 3 and the concomitant rectilinear movement of the sled system 30, the hooks 214 of the hook element 21 reach a position directly above the receiving holes 314. As the spring assembly contracts and pulls the tie 22 to the left in FIG. 12b, the hook element 21 undergoes a clockwise motion, which in turn causes the hooks 214 to enter the receiving holes 314 in the slide 31.

Once the connection has taken place, the hook member 21 moves further to the left under the action of the spring assembly and the hooks 214 come into stable engagement with the receiving holes 314 in the slide 31 as shown in FIG. 12c.

The window is now ready for normal operation and during the subsequent closing of the intermediate frame 3, the movement of the lifting arm pulls the sled system 30 towards the top of the window, i. E. to the right as shown in FIG. 12d. The closing movement occurs during the simultaneous additional force of the spring assembly 20, as is known per se.

If it becomes necessary to remove the secondary frame or frames, the dormer is prepared for disconnection by first turning the intermediate frame 3 to the open position. The connecting plate 25 is then moved from the first, lower, position to the second, or upper, position in an upward movement, indicated by arrow A in FIG. 12f. In the embodiment shown, the window in the position in FIG. 12f is incompletely open, i.e. the sled system 30 is not in the leftmost position, but is spaced from the spring assembly 20 by a few millimeters. In practice, the flap is pivoted to the fully open position and then pushed back slightly in the closing direction so that the connecting plate can be freely pushed upward. In this state, the link plate is held in the upper position by friction. The hook element 21 is still in engagement with the carriage system 30 as the hooks 214 engage in the holes 314 of the carriage 31 until the user lifts the flap. During this movement, the hook element 21 can move upwards counterclockwise. In this case, the hook element 21 moves to an unlocked position, in which connection is not possible. This action causes the bottom flange 253 of the connecting plate 25 to abut against the rear side of the base plate 212 of the hook element 21. The hook element 21 thereby makes a counterclockwise movement which keeps it in an unlocked position. It is now possible to remove the secondary frame (s) from the primary frame, in this case the intermediate frame 3 with the sash 2 and the glass 4 are lifted from the connection to the stationary frame 1. The lifting of the connecting plate 25 can in principle be carried out in any suitable way. However, in order to prevent accidental disconnection, it is preferable to use a suitable tool.

The transfer of the dormer back to the connection position is carried out by simply turning the intermediate frame 3 to the closed position. Towards the end of the closing movement, the lift arm 14 pushes the link plate 25 downward in the direction indicated by arrow B in FIG. 12h. When the counterclockwise movement previously performed by the hook element 21 is terminated, the hook element 21 can be rotated clockwise to assume the position shown in FIG. 12a.

The present invention has been described with reference to the sash and dormer frame, however, it should be understood that it is also applicable with other frame structures such as door frames.

List of positions.

- Primary frame (stationary frame),

- the first secondary frame (sash),

- the second secondary frame (intermediate frame),

- glass,

- top mount,

- part of the hinge attached to the frame,

- a pen,

- ventilation device,

- lifting device,

- hinge pin,

- the first end of the lifting arm,

- the second end of the lifting arm,

- lifting arm,

- top bearing mount,

- guide rail,

- spring assembly,

- the first connecting element / hook element,

210 - top,

211 - hole

212 - base plate,

213 - flange,

214 - hook

215 - rounded transition edge,

216 - inclined edge,

217 - upper part,

217a - groove in the upper part,

218 - bottom edge,

219 - inclined edge,

- tension rod,

221 - rod,

222 - head,

223 - the first inclined part,

224 - second inclined part,

225 - an adjusting ring,

- corner element,

231 - hole

231a - enlarged cross-sections of the hole,

232 - shelf protruding upward,

233 - bottom shelf,

234 - protruding flange,

235 - clearance,

- the end part,

241 - hole

242 - wall protruding upward,

243 - ledge,

244 - protruding flange,

244a - rib,

245 - track,

246 - bent parts of the flange,

- connecting plate,

251 - elongated hole,

253 - base,

- 7 037808

254 - cutout,

255 - tongue protruding upward,

- adjusting plate,

- spring casing,

- buffer spring system,

281 - external spring,

282 - internal spring,

283 - spring plug,

284 - spring plug,

- main spring system,

291 - spring

292 - tubular gasket,

- sled system,

- the second connecting piece / sled,

310 - lower part,

311 - the first wall,

312 - second wall,

313 - narrowing,

314 - receiving hole,

315 - hole

316 - hole

317 - first hole,

318 - second hole,

319 - cut

- slider,

320 - lower part,

321 - the first wall,

321a - first groove,

322 - second wall,

322a - second undercut,

323 - support,

324 - hole

325 - cutout,

326 - cutout,

327 - elastic part protruding upwards,

328 - edge,

329 - flange,

- axis,

401 - grooved end,

402 is the other end

403 - tags

404 - positioning mark,

- friction brake device,

- friction brake element,

- the first cone,

- the second cone,

- spring stopper.

Claims (16)

CLAIM 1. Dormer for installation on an inclined roof surface, containing a primary frame (1), at least one secondary frame (2, 3), such as a sash and / or an intermediate frame (3), and a lifting device (10) containing a lifting arm (14) inserted between the primary frame and at least one secondary frame (2, 3), a skid system (30) and a coupling mechanism, wherein the first end (12) of the lifting arm (14) is rotatably connected to the system (30) a carriage connected to the primary frame (1) with its ability to slide in the guide (16) of the carriage, and its second end (13) is rotatably connected to at least one secondary frame (3), while the lifting device ( 10) further comprises a spring unit (20) configured to be connected to the sled system (30) and to the first end (12) of the lifting arm (14) by means of a connecting mechanism so that the spring unit (20) is able to assume an unconnected state and connected fortunes f relative to the sled system (30), while connecting - 8 037808 the body mechanism contains the first connecting element (21) connected with the spring unit (20) and made with the possibility of interaction with the second connecting element (31) connected with the sled system (30), while the first connecting element contains the element (21 ) of the hook, and the second connecting element comprises a receiving means formed in the sled system (30) and configured to interact with the hook element (21) in the connected state, and the hook element (21) is configured to assume at least an unlocked position and an engaged position, characterized in that the connecting mechanism also comprises a connecting plate (25) configured to assume at least a first position corresponding to a connected state and a second position corresponding to a disconnected state, while the connecting plate (25) allows element (21) of the hook take an unlocked position, and the element (21) to the hook of the first connecting element has at least one hook (214) facing the sled system (30), while the hook element (21) has a U-shaped configuration containing a base plate (212) and two flanges (213), while this at least one hook (214) is located on one of or on each of the flanges (213), while the spring assembly (20) comprises a tie (22) containing a rod (221) extending substantially along the length of the spring assembly (20), and the head (222) facing the hook element (21), while the tie (22) has at least one inclined section (223, 224) at the transition between the head (22) and the rod (221), and the element (21) of the hook contains a hole (211) in the base plate (212) for the passage of the tie (22) so that the head (222) of the tie (22) remains in the U-shaped element on the front side of the base plate (212), and the rod (221) protrudes from the rear, while the link plate (25) of the coupling mechanism has a base (252) located on the back days to the side of the plate (212) of the base of the element (21) of the hook, and has an oblong hole (251) for passing the rod (221) of the tie (22), and the connecting plate (25) is made to slide in the plane of the base (252), along essentially perpendicular to the rod (221) so that when the connecting plate (25) is in the first, or lower, position, the element (21) of the hook is placed with the possibility of accepting an engaged position, and when it is in the second, or upper, position, the element (21 ) of the hook is held in an unlocked position, and wherein the connecting plate (25) has a lower flange (253) formed on the base (252) to abut at least one inclined portion (223) in the unlocked position. 2. A window according to claim 1, wherein the connecting plate (25) has a cutout (254) at the top of the base (252) to form at least one tab, preferably two tabs (255) projecting upward. 3. A window according to any one of claims 1, 2, in which next to the head (222) of the tie (22) there is a corner element (23) having an opening (231) for passing the rod (221) of the tie (22). 4. Window according to claim 3, in which there is a tip (24) having a hole (241) for passing the rod (221) of the tie (22), while the tip (24) further has a wall (242) extending upward, on which a projection (243) surrounding an opening (241) in the tip (24), with two protruding flanges (244) on each side of the upwardly extending wall (242) to form a track (245). 5. Window according to claim 4, wherein there is a corner element (23) comprising an upwardly extending shelf (232) and a bottom shelf (233), wherein the opening (231) in the corner element (23) is made in the upwardly extending shelf (232 ), where two protruding flanges (234) are located substantially parallel to the bottom flange (233) and each defines a gap (235) relative to the upwardly extending flange (232). 6. A window according to claim 5, wherein the tip (24) is positioned such that its rear side of the upwardly extending wall (242) abuts against the front side of the upwardly extending shelf (232) of the corner element (23) between the bottom shelf (233) and the protruding flanges (234), and the base (252) of the connecting plate (25) is slidably inserted into the track (245) of the tip (24) and into the corresponding gaps (235) of the corner element (23). 7. A window according to any one of claims 1-6, in which each flange (213) of the U-shaped element (21) of the hook at the front end comprises a top (210), a rounded transition (215) between the top (210) and the hook ( 214), the lower edge (218) between the hook (214) and the base plate (212), the opposite upper portion (217) and at least one inclined edge portion (216, 219) between the upper portion (217) and the apex (210) ... 8. A window according to any one of claims 1 to 7, in which the receiving means of the second connecting element comprises at least one receiving opening (314) in the slide (31) of the slide system (30). 9. Window according to claim 8, in which the slide (31) comprises a lower part (310), a first wall (311) and a second wall (312), while at each transition between the first wall (311) and the lower part (310) and between the second wall (312) and the lower part (310), preferably one receiving opening - 9 037808 (314), and in the first wall (311) and in the second wall (312) there is an opening (315) for receiving the axis (40) connected to the first end (12) of the lifting arm (14). 10. Window according to any one of claims 8, 9, in which the sled system (30) comprises a slider (32) configured to accommodate a slide (31) therein and containing an opening (324) located opposite the receiving opening (314) of the slide (31). 11. A window according to any one of claims 1 to 7, wherein the receiving means of the second connecting element comprises an axle (40) connected to the first end (12) of the lifting arm (14). 12. A window according to any one of claims 1 to 11, in which the hook element (21) of the first connecting means is arranged with the possibility of sliding contact with the sled system (30) in one direction and with the possibility of engaging with the second connecting element (31) in the other direction ... 13. A window according to any one of claims 1-12, wherein the connecting plate (25) comprises at least one friction-increasing portion (256). 14. A method for installing a dormer window according to any one of claims 1-13, having a primary frame, at least one secondary frame and a lifting device inserted between the primary frame and the secondary frame, comprising the steps of i) install the primary frame to the roof structure; and ii) connect the secondary frame to the primary frame. 15. The method of claim 14, wherein step ii) comprises the steps of a) sliding the sled system in the sled guide by opening the secondary frame until the first connecting element contacts and engages with the second connecting element; and b) close the secondary frame. 16. A method for removing the secondary frame of a dormer window according to any one of claims 1 to 13, comprising the steps of a) open the secondary frame; b) set the connecting plate to the second position; c) pressing the first connecting piece against the connecting plate by further opening the secondary frame and d) remove the secondary frame.