Device for closing a room opening
Patent Information
- Application Number
- EP2023745604
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-02-27
- Filing Date
- 2023-08-02
- Publication Date
- 2025-11-19
AI Technical Summary
Existing devices for closing room openings with movable wing elements face challenges in achieving a tight seal with minimal actuation force, particularly when inflatable seals are supplied with compressed air, which becomes complex when arranged on the displaceable wing element, requiring muscle power and limiting design freedom.
A device with a compressed air coupling system that allows for easy air supply to inflatable seals, featuring coupling halves on both the sliding sash and outer frame, enabling efficient sealing with minimal offset tolerance and reduced risk of contamination or damage, allowing for displacement without loss of function due to thermal expansion or contraction.
The solution provides a reliable and efficient sealing mechanism that minimizes the need for muscle power, maintains sealing quality, and allows for easy installation and operation, even with thermal changes, while maintaining design flexibility.
Smart Images
Figure EP2023071428_06092024_PF_FP
Abstract
Description
[0001] Device for closing a room opening
[0002] TECHNICAL FIELD
[0003] The invention relates to a device for closing a room opening according to the preamble of patent claim 1.
[0004] STATE OF THE ART
[0005] Devices for closing a room opening with movable wing elements are known from the state of the art in a wide variety of variants.
[0006] A particular challenge with such systems is the sealing of the movable sash elements against the fixed outer frame and, if applicable, adjacent sash elements. When closed, the best possible sealing effect must be achieved, which requires the seals to fit tightly against the associated sealing surfaces. However, when the sash elements are moved, the seals should not have any contact with the sealing surfaces, in order to enable movement with the lowest possible actuation forces.
[0007] In the state of the art, this problem is solved by the seals either being guided mechanically against the sealing surfaces when closing the movable wing elements and being mechanically lifted off the sealing surfaces again for opening and moving, or by using inflatable seals which are inflated when the wing element is closed and are deflated again for opening and moving the wing element.
[0008] Typically, the inflatable seals are mounted on the fixed outer frame because this makes supplying compressed air to the seals extremely easy. However, if the seals are mounted on the movable wing element—which is particularly advantageous when other movable elements are adjacent to the wing element—the supply of compressed air to the seals becomes much more difficult and complex, which is why this option is rarely chosen.
[0009] From CN1676854A, it is known to inflate the inflatable seal of a sliding wing using a door handle designed as an air pump. This solution has the disadvantage that muscle power is required to inflate the seals, and the quality of the seal is highly dependent on the operator. Furthermore, the design freedom regarding the door handle is severely limited due to its dual function.
[0010] PRESENTATION OF THE INVENTION
[0011] The task therefore arises to provide technical solutions which do not have the aforementioned disadvantages of the state of the art or which at least partially avoid them.
[0012] This problem is solved by the subject matter of patent claim 1.
[0013] This relates to a device for closing a room opening, which comprises an outer frame for arrangement in the room opening and a sliding sash element arranged therein. The sliding sash element can be moved in the outer frame between an open position and a closed position. It has a seal that can be activated by the application of compressed air, for sealing it in the closed position against the outer frame and, if applicable, also against other fixed or sliding sash elements adjacent to the sides.
[0014] The device further comprises a compressed air coupling with two associated coupling halves, which serves to transmit compressed air from the outer frame to the sliding sash element. Of these two coupling halves of the compressed air coupling, a first is arranged on the sliding sash element and connected to a first compressed air line for supplying compressed air from the compressed air coupling to the seal of the sliding sash element, and the second of the two coupling halves of the compressed air coupling is arranged on the outer frame and connected to a second compressed air line for supplying compressed air from a compressed air source to the compressed air coupling.
[0015] The device is designed in such a way that when the sliding sash element is moved from the open position to the closed position, the first coupling half arranged thereon is coupled to the associated second coupling half arranged on the outer frame.
[0016] The pneumatic coupling is advantageously designed in such a way that it tolerates a certain offset of the two coupling halves relative to one another in the vertical direction based on the intended installation situation of the device, preferably a displacement of at least + / - 1.0 mm around a intended target position. This makes it possible for an offset between the coupling halves caused, for example, by thermal expansion or heat shrinkage of components of the device to occur without this leading to a loss of function or a defect. This is particularly important if the sliding sash element is supported by sliding guides in the area of its lower horizontal circumferential boundaries, which is preferred, and the pneumatic coupling is arranged at a large vertical distance from the sliding guides.
[0017] In a preferred embodiment of the device according to the invention, the pneumatic coupling comprises a plug-type coupling half and an associated socket-type coupling half. Such pneumatic couplings have the advantage that they allow a tight coupling of the two coupling halves in a simple and reliable manner.
[0018] In a first variant, it is provided that the sliding sash element provides the socket-like coupling half and the outer frame provides the plug-like coupling half.
[0019] In a second variant, it is provided that the sliding sash element provides the plug-like coupling half and the outer frame provides the socket-like coupling half.
[0020] In particular, in devices according to the invention in which the sliding sash element enters a groove in a vertical circumferential side of the outer frame when closing, the first variant is preferred because the plug-like coupling half can be arranged in the groove and can thus be prevented from projecting into the released opening when the sliding sash is open.
[0021] In another preferred embodiment of the device according to the invention, the pneumatic coupling has coupling halves that adjoin one another without penetrating one another using one or more seals. Such pneumatic couplings can be particularly easily equipped with a large offset tolerance.
[0022] It is preferred that the compressed air coupling comprises a sealless coupling half, which advantageously provides a flat sealing surface within which a first opening for supplying or discharging compressed air is arranged, and a coupling half with a second opening surrounded by a seal for supplying or discharging compressed air, the seal of which is positioned on the sealing surface of the sealless coupling half for coupling the two coupling halves.
[0023] In yet another preferred embodiment of the device according to the invention, the first coupling half of the pneumatic coupling is arranged on a vertical peripheral side of the sliding sash element. This is particularly advantageous when the sliding sash element, in the closed state, abuts the outer frame or another stationary sash element with its vertical peripheral side.
[0024] It is further preferred that the first coupling half of the pneumatic coupling be arranged in the region of the upper third, even more preferably in the region of the upper quarter of the vertical circumferential side. In this way, the risk of contamination or damage to the coupling halves of the pneumatic coupling when the sliding wing element is open can be minimized.
[0025] In yet another preferred embodiment of the device according to the invention, the first coupling half of the compressed air coupling is arranged on a horizontal circumferential side of the sliding wing element.
[0026] This design is particularly advantageous if the sliding sash element, when closed, does not abut the outer frame or another fixed sash element with a vertical peripheral side.
[0027] It is further preferred that the first coupling half of the compressed air coupling is arranged on the upper horizontal circumferential side of the sliding sash. In this way, the risk of contamination or damage to the coupling halves of the compressed air coupling when the sliding sash element is open can be minimized, and it also becomes possible to couple sliding sashes that are displaceable in the same plane and adjoin one another at the end faces or that adjoin one another at an angle to a compressed air supply according to the invention.
[0028] The sliding sash element is preferably a glass sliding sash. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Further embodiments, advantages, and applications of the invention will become apparent from the dependent claims and the following description with reference to the figures. In these figures:
[0030] Fig. 1 shows a device according to the invention for closing a room opening in front view;
[0031] Fig. 1a shows a section along the line AA in Fig. 1 in a first embodiment with an internal sliding sash and a first sealing variant;
[0032] Fig. 1b shows a section along the line BB in Fig. 1 in the first embodiment with an internal sliding sash and the first sealing variant; Figures 2a and 2b show representations like Figures 1a and 1b with a second sealing variant; Figures 3a and 3b show detail X from Fig. 1b, once with the seal activated and once with the seal deactivated. Figures 4a and 4b show detail Y from Fig. 2b, once with the seal activated and once with the seal deactivated.
[0033] Fig. 5a shows a vertical section through the pneumatic coupling between the sliding sash 2 and the outer frame 1 in Fig. 1 in the area designated by "A" in Fig. 1;
[0034] Fig. 5b is a plan view of the front side of the right vertical frame part of the sliding sash 2 from Fig. 1 in the area designated by "A" in Fig. 1;
[0035] Fig. 5c is a plan view of the pneumatic coupling half attached to the right vertical frame part of the outer frame in the area designated "A" in Fig. 1;
[0036] Fig. 6 is a view similar to Fig. 1 of a second embodiment variant with two fixed wing elements and a centrally arranged inner sliding door 1;
[0037] Fig. 6a is a section along the line CC in Fig. 6;
[0038] Fig. 6b is a section along the line DD in Fig. 6;
[0039] Fig. 7a is a perspective view (partially sectioned) of a first variant of the pneumatic coupling between the sliding wing 2 and the outer frame 1 in Fig. 6 in the area designated by "B";
[0040] Fig. 7b is a perspective view of the components of the pneumatic coupling from Fig. 7a without the parts of the sliding wing 2 and the outer frame 1;
[0041] Fig. 8a is a perspective view (partially sectioned) of a second variant of the pneumatic coupling between the sliding wing 2 and the outer frame 1 in Fig. 6 in the area marked "C"; and
[0042] Fig. 8b is a perspective view of the components of the pneumatic coupling from Fig. 8a without the parts of the sliding wing 2 and the outer frame 1;
[0043] WAYS OF IMPLEMENTING THE INVENTION
[0044] Fig. 1 shows the front view of a device according to the invention for closing a room opening in the form of a two-wing window arrangement.
[0045] As can be seen in conjunction with Figures 1a and 1b, which show sections along the line AA in Fig. 1 and along the line BB in Fig. 1 in a first embodiment of the window arrangement with an internal sliding sash 2 and an external fixed window sash 3, the window arrangement has an outer frame 1 for arrangement in the room opening to be closed.
[0046] This outer frame 1 comprises an upper horizontal frame part 10 and a lower horizontal frame part 11, as well as two lateral vertical frame parts 20. Both the sliding sash 2 and the fixed window sash 3 each have their own surrounding frame 4, 5, with which they are arranged in the outer frame 1 in such a way that they extend in mutually offset, parallel planes.
[0047] The sliding sash 2 can be moved in the outer frame 1 between a fully open position and the fully closed position shown, and it can be arranged in any partially open intermediate position.
[0048] The outer frame 1 has a circumferential, radially inwardly extending sealing web 6, which forms with a first of its two side surfaces a first sealing surface 7 facing the surrounding frame 4 of the sliding sash 2 and extending parallel to the plane of extension of the sliding sash 2.
[0049] In the closed position, the surrounding frames 4, 5 of the sliding sash 2 and the fixed window sash 3 have adjacent vertical frame parts 8, 9 which extend between the upper horizontal frame part 10 of the outer frame 1 and the lower horizontal frame part 11 of the outer frame 1.
[0050] In the case of the fixed window sash 3, this adjacent vertical frame part 9 is designed in such a way that it forms a first supplementary sealing surface 12 which extends in the plane of the first sealing surface 7 between the sealing web 6 in the upper horizontal frame part 10 of the outer frame 1 and the sealing web 6 in the lower horizontal frame part 11 of the outer frame 1.
[0051] This first supplementary sealing surface 12 forms, together with the first sealing surface 7 formed by the sealing web 6 in the upper horizontal frame part 10 of the outer frame 1 and the first sealing surface 7 formed by the sealing web 6 in the lower horizontal frame part 11 of the outer frame 1, a substantially continuous common sealing surface 7, 12.As can be seen, the surrounding frame 4 of the sliding sash 2 has, on that of its outer sides which, in the closed position, lie opposite the first sealing surface 7 of the sealing web 6 and the first supplementary sealing surface 12 of the vertical frame part 9 of the fixed window sash 3, a circumferential first seal 13 which extends parallel to the plane of extension of the first sealing surface 7 and can be activated by means of compressed air, for sealingly adjoining the first sealing surface 7 of the sealing web 6 of the outer frame 1 and the first supplementary sealing surface 12 of the vertical frame part 9 of the fixed sash element 3. In Figures 1a and 1b, the seal 13 is shown in the activated state. To move the sliding sash 2 in the outer frame 1, it can be deactivated by removing the compressed air supply.
[0052] Figures 3a and 3b show the detail X from Fig. 1b once with activated seal 13 and once with deactivated seal 13. As can be seen, the sealing side of the seal 13 is retracted into the seal in the deactivated state and is unfolded when the seal 13 is activated by applying compressed air to its interior and is pressed against the sealing surface 7 of the sealing web 6 and the supplementary sealing surface 12 of the vertical frame part 9 of the fixed window sash
[0053] 3 pressed .
[0054] In the area in which the seal 13 is pressed against the first sealing surface 7 of the sealing web 6, the profile 10, 11, 20 of the outer frame 1 provides on the opposite side a profile projection 18 with a stop sealing profile 19 arranged thereon, which is designed as a sealing element and provides an additional seal between the surrounding frame
[0055] 4 of the sliding sash 2 and the outer frame 1. The stop seal profile 19 always rests against the surrounding frame 4 of the sliding sash 2, so that it touches it when the sliding sash 2 is moved.
[0056] As can be seen from Fig. 1b, in the closed position the adjacent vertical frame parts 8, 9 of the surrounding frames 4, 5 of the sliding sash 2 and the fixed window sash 3 engage behind one another in such a way that there is a positive connection between these frame parts 8, 9 in a direction perpendicular to the extension planes of the two sash elements 2, 3. The surrounding frame 8 of the sliding sash 2 has a brush seal 22 on its side assigned to the surrounding frame 9 of the fixed window sash 3, which brush seal seals against the surrounding frame 9 of the fixed window sash 3.
[0057] Figures 2a and 2b show representations like Figures 1a and 1b with a second sealing variant.
[0058] In contrast to the first sealing variant according to Figures 1a and 1b, in this sealing variant the first sealing surface 7 and the first supplementary sealing surface 12 are not formed by the actual structural profile, but by sealing surface profiles 17 which are arranged on the sealing web 6 and on the vertical frame part 9 of the surrounding frame 5 of the fixed window sash 3.
[0059] Figures 4a and 4b show detail Y from Fig. 2b, once with the seal 13 activated and once with the seal 13 deactivated. As can be seen, the sealing side of the seal 13 is retracted into the seal in the deactivated state and, when the seal 13 is activated, is unfolded by pressurizing its interior with compressed air and pressed against the sealing surface 7 of the sealing surface profile 17 of the sealing web 6 and the supplementary sealing surface 12 of the sealing surface profile 17 of the vertical frame part 9 of the fixed window sash 3. The remaining structure is identical to that shown in Figures 1a and 1b, which is why there is no need for a detailed explanation again and only the differing elements are designated by reference numbers in the figures.
[0060] As can be seen in conjunction with Figures 5a and 5b, which show a vertical section through the compressed air coupling between the sliding sash 2 and the outer frame 1 in Figure 1 in the area marked "A" (Figure 5a) and a plan view of the front side of the right vertical frame part of the sliding sash 2 (without the cover profile 23) in this area (Figure 5b), there is a compressed air coupling at the top right corner of the sliding sash 2 between the outer frame 1 and the sliding sash 2, which transmits compressed air from the outer frame 1 to the sliding sash 2 when the sliding sash 2 is closed in order to activate the inflatable seal 13.
[0061] The compressed air coupling has two associated coupling halves, which are separated when the sliding sash 2 is opened and coupled together when it is closed.
[0062] The sliding sash 2 provides a plug-type coupling half which, when the sash 2 is closed, is inserted into an associated socket-type coupling half on the outer frame 1. The coupling half on the sliding sash 2 comprises a collecting block 14 which is connected to a compressed air line 15 for supplying compressed air to the seal 13 and which, on the front side, carries a coupling tube 16 with a fastening plate 21 which passes through the cover profile 23 on the front side of the sliding sash 2. The coupling tube 16 has, in the region of its free end, an O-ring 24 on its circumference for sealing when coupled to the socket-type coupling half on the outer frame 1.
[0063] The bushing-like coupling half on the outer frame 1 comprises a supporting cage 25 in which a base block 27 is slidably mounted by means of two leaf springs 26. This base block 27 is connected to an elastic compressed air line 29 for supplying compressed air to the compressed air coupling and has a coupling bore 28 for receiving the coupling tube 16 of the coupling half of the sliding sash 2. The end face of the base block 27, which provides the coupling bore 28, passes through the cover profile 30 in the outer frame 1.
[0064] Fig. 5c shows a plan view of the support cage 25 with the base block 27 mounted therein via the two leaf springs 26. As can be seen therein, the base block 27 is displaceable in the support cage 25 against the restoring forces of the leaf springs 26 in a plane which extends perpendicular to the insertion direction of the coupling tube 16 into the coupling bore 28.
[0065] Accordingly, the pneumatic coupling is designed in such a way that it allows a displacement of the areas of the sliding sash 2 and the outer frame 1 that provide the two coupling halves relative to one another in a vertical direction, based on the intended installation situation of the window arrangement. If the coupling tube 16 is not exactly aligned with the coupling bore 28 when the sliding sash 2 is closed, the base block 27 is displaced over the insertion bevel 31 at the free end of the coupling tube 16 until the coupling tube 16 can penetrate into the coupling bore 28 in the base block 27.
[0066] Fig. 6 shows a view like Fig. 1 of a variant with two fixed wing elements 3, 3a and a centrally arranged inner sliding wing 2.
[0067] 6a and 6b, which show sections along the lines C-C and DD in Fig. 6, this is a two-rail design, as with the previously discussed variants. Apart from the second fixed sash element 3a, this only differs from the design variant according to Figs. 1, 2a and 2b in that here both vertical frame parts 8, 8a of the surrounding frame 4 of the sliding sash 2, in the closed state, border on a vertical frame part 9, 9a of one of the surrounding frames 5, 5a of the two fixed sash elements 3, 3a, in an identical way to how the vertical frame part 8 of the sliding sash 2 borders on the vertical frame part 9 of the fixed window sash 3 in Fig. 2a. Accordingly, for details, reference can be made to the previous discussion of Figures 1, 2a and 2b.
[0068] Fig. 7a shows a perspective view of a first variant of a compressed air coupling between the sliding sash 2 and the outer frame 1 in the coupled state, as can be used for a coupling in the area designated by "B" in Fig. 6, wherein the upper horizontal frame part 10 of the outer frame 1 is cut away above the surrounding frame 4 of the sliding sash 2 to make the coupling situation clear, and only that half of the profile of the horizontal frame part 10 is shown together with the web 6 in which the sliding sash 2 is guided. In contrast to the embodiment according to Fig. 6b, the sliding sash 2 here has inflatable seals 13 on both sides of its upper horizontal frame part of the surrounding frame 4.
[0069] As can be seen in conjunction with Fig. 7b, which shows a perspective view of only the components of the pneumatic coupling from Fig. 7a without the parts of the sliding wing 2 and the outer frame 1 in the uncoupled state, the pneumatic coupling has two associated coupling halves, which are separated when the sliding wing 2 is opened and coupled together when the same is closed.
[0070] Here too, the sliding sash 2 provides a plug-like coupling half which, when the sliding sash 2 is closed, is inserted into an associated socket-like coupling half in the outer frame 1 and is thereby coupled. The coupling half on the sliding sash 2 comprises a collecting block 14 arranged in the upper horizontal frame part of the surrounding frame 4 of the sliding sash 2, which is connected to two compressed air lines 15 for supplying compressed air to the seals 13 and has a coupling tube 16 on its front side. The coupling tube 16 has two O-rings 24 on its circumference in the region of its free end for sealing when coupled to the socket-like coupling half in the outer frame 1.
[0071] The bushing-like coupling half in the outer frame 1 comprises a base block 27, which is arranged within the upper horizontal frame profile 10 of the outer frame 1 and is connected to a compressed air line 29 for supplying compressed air to the compressed air coupling. The base block 27 has a coupling bore 28 for receiving the coupling tube 16 of the coupling half of the sliding sash 2.
[0072] The coupling tube 16 is made of plastic and is elastic enough to align itself with the coupling bore 28 via the insertion bevel 31 arranged at this end in the event of a possible offset of its free end relative to the coupling bore 28 of up to +- 1.5 mm when the sliding sash 2 is closed, and thereby to enable insertion into this for coupling the coupling half of the sliding sash 2 to the coupling half of the outer frame 1.
[0073] Accordingly, the pneumatic coupling is also designed in such a way that it allows a displacement of the areas of the sliding sash 2 and the outer frame 1 providing the two coupling halves relative to each other in the vertical direction with respect to the intended installation situation of the window arrangement.
[0074] Figures 8a and 8b show representations like Figures 7a and 7b of a second variant of a compressed air coupling between the sliding sash 2 and the outer frame 1 in the coupled state, as can be used for a coupling in the area designated by "C" in Figure 6. Similar components are provided with the same reference numbers as in Figures 7a and 7b, which is why a detailed description with reference to what has been said about Figures 7a and 7b can be omitted.
[0075] The only significant difference between this second variant and the variant shown in Figures 7a and 7b is that here the collecting block 14 of the plug-type coupling half of the sliding sash 2 is arranged on the upper side of the upper horizontal frame part of the surrounding frame 4 of the sliding sash 2, and not in it, and that the coupling tube 16 extends above the surrounding frame 4 of the sliding sash 2 parallel to its upper side.
[0076] The base block 27 with the coupling bore 28 for receiving the coupling tube 16 of the coupling half of the sliding wing 2 is arranged in the area above the sliding wing 2 in the outer frame and is designed to be correspondingly flatter so that it does not hinder the sliding movement of the sliding wing 2 arranged underneath.
[0077] In all embodiments shown in the figures, the coupling halves, which are provided by the outer frame, either contain their own valves, which open the compressed air supply to the coupling half in the outer frame 1 when the sliding sash 2 is closed and interrupt this when the sliding sash 2 is opened, or there are separate electrically or mechanically operated valves connected upstream, which take over this task.
[0078] While preferred embodiments of the invention are described in the present application, it is to be clearly understood that the invention is not limited thereto and may be embodied in other ways within the scope of the following claims.
Claims
PATENT CLAIMS 1. Device for closing a room opening, comprising an outer frame (1) for arrangement in the room opening and a sliding sash element (2) arranged therein, which is displaceable in the outer frame (1) between an open position and a closed position, wherein the sliding sash element (2) has a seal (13) that can be activated by the application of compressed air, for sealing the sliding sash element (2) in the closed position relative to the outer frame (1) and possibly also relative to laterally adjacent further fixed or displaceable sash elements (3), wherein the device has a compressed air coupling with two associated coupling halves for transmitting compressed air from the outer frame (1) to the sliding sash element (2), wherein the sliding sash element (2) provides a first of the two coupling halves of the compressed air coupling,which is connected to a first compressed air line for supplying compressed air to the seal (13), and the outer frame (1) provides the second of the two coupling halves of the compressed air coupling, which is connected to a second compressed air line for supplying compressed air to the compressed air coupling, and wherein the device is designed such that when the sliding sash element (2) is moved from the open position to the closed position, the first coupling half arranged thereon is coupled to the associated second coupling half arranged on the outer frame (1).
2. Device according to claim 1, wherein the compressed air coupling is designed in such a way that it allows a displacement of the areas of the sliding wing element (2) and the outer frame (1) providing the two coupling halves relative to one another in the vertical direction with respect to the intended installation situation of the device.
3. Device according to claim 2, wherein the compressed air coupling is designed in such a way that it allows a displacement of the areas of the sliding wing element (2) and the outer frame (1) providing the two coupling halves relative to one another of at least + / - 1.0 mm around a specified target position.
4. Device according to one of the preceding claims, wherein the compressed air coupling comprises a plug-type coupling half and an associated socket-type coupling half.
5. Device according to claim 4, wherein the sliding wing element (2) provides the socket-like coupling half and the outer frame (1) provides the plug-like coupling half.
6. Device according to claim 4, wherein the sliding wing element (2) provides the plug-type coupling half and the outer frame (1) provides the socket-type coupling half.
7. Device according to one of claims 1 to 3, wherein the pneumatic coupling has coupling halves which are adjacent to one another without penetrating one another using one or more seals.
8. Device according to claim 7, wherein the compressed air coupling comprises a sealless coupling half, which provides a particularly flat sealing surface within which a first opening for supplying or discharging compressed air is arranged, and a coupling half with a second opening surrounded by a seal for supplying or discharging compressed air, the seal of which is positioned on the sealing surface of the sealless coupling half for coupling the two coupling halves.
9. Device according to one of the preceding claims, wherein the first coupling half of the compressed air coupling is arranged on a vertical circumferential side of the sliding wing element (2), in particular in the region of the upper third, in particular the upper quarter of the vertical circumferential side.
10. Device according to one of claims 1 to 8, wherein the first coupling half of the compressed air coupling is arranged on a horizontal circumferential side of the sliding wing element (2), in particular on the upper horizontal circumferential side.
11. Device according to one of the preceding claims, wherein the sliding wing element (2) is supported by sliding guides in the region of its lower horizontal circumferential boundaries.
12. Device according to one of the preceding claims, wherein the sliding sash element (2) is a glass sliding sash.