DE20310889U1 - Gap ventilation device - Google Patents

Abstract

The window opening has a blending frame (2) that moves around a vertical axle (VA) and a horizontal axle (HA) and can be tilted in this way. The window frame (1) and blending frame form an extending unit (4) with an extending arm (5) that extends from a position (6) and the arms glide in the frame.

Description

PATENT ATTORNEYS

Dipl.-Ing. A. Wasmeier

Dipl.-Ing. H. Graf

Admitted to the European Patent Office + Trade Mark Office · Professional Representatives before the European Patent Office + Trade Mark Office Patent Attorneys PO Box 10 08 26 93008 Regensburg

German Patent and Trademark Office Zweibrückenstr.

80297 Munich

D-93008 REGENSBURG P.O. BOX 10 08

D-93055 REGENSBURG GREFLINGERSTRASSE

phone

(0941)79 20 (0941)79 20 (0941)79 51

Fax E-mail: wasmeier-graf@t-online.de

Your Ref.

Your Message Your Letter

Our Ref

G/g 21,297

date

15.07.2003 gr-ra-ba

Applicant:

Gretsch-Unitas GmbH Building fittings
Johann-Maus-Str. 3 71254 Ditzingen

Title:

Gap ventilation device

Accounts HypoVereinsbank (bank code 750 200 73) 5 839 300 Place of jurisdiction Regensburg

Postgiro office IVtonphse^ZIP 7QO 100^01293 69-8JD1 ^21297 ooc

Gap ventilation device

The innovation relates to a gap ventilation device according to the generic term of claim 1.

Distribution scissors are known for tiltable, in particular pivotable and tiltable sashes (also tilt or tilt-turn sashes) of building windows and doors. Tilt or turn-tilt fittings are also known, which are intended for such sashes and each have a distribution scissor with which the maximum tilting movement or tilt opening movement is limited and thus the maximum tilt position is determined.

In many cases, it is desirable for tilt-and-turn sashes to be able to have a secured tilt or intermediate position for the sash between the maximum tilt position and the closed position, namely for a reduced ventilation gap, in which the sash is fixed or at least secured to such an extent that it can only be moved from this intermediate position by overcoming a certain force.

A device that enables such a secured intermediate position of the sash is referred to as a "gap ventilation device" in the sense of the innovation.

A sash lock (DE 91 00 374.1) is known which essentially consists of a lever which is pivotably provided on a window frame and which has a number of locking teeth arranged in succession in the longitudinal direction of the lever. The locking teeth work together with a bolt-like locking element provided on the window frame in such a way that in the respective tilt position secured by the sash lock, the locking element is engaged in a locking tooth of the pivoting lever. The sash lock is provided in addition to the scissor mechanism of the tilt and turn window. One of the disadvantages is that the sash lock is visible and therefore visually disturbing and represents an additional structurally complex functional element. The

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Sash locks not only disturb the visual appearance of the window, but also require additional manufacturing and assembly work.

A locking device for limiting the opening of tilt and top-hung sashes is also known (DE 24 51 556 A 1). In this known device, the functional elements for limiting the opening, i.e. for the gap opening, are integrated into the scissor stay, namely as a locking element that interacts with a toothing. The locking element is formed at the end of a pin, via which the scissor stay arm is guided in a sliding guide of a faceplate of the tilt-and-turn fitting so that it can be moved and pivoted. The locking element interacts with a serration that is provided on a drive rod of the fitting and can be moved from an inactive position to an active position, which thus locks the locking element, by operating the drive rod. Disadvantages of this known design include the relatively complex construction and the fact that reliable long-term use of this known extension scissors is not guaranteed, as the play in such scissors is relatively large or increases with use due to wear and tear. In addition, it is necessary to operate the operating or locking lever of the fitting accordingly in order to lock the respective intermediate position (gap ventilation position), which is cumbersome and requires a different operation from the conventional one that takes some getting used to.

A scissor-stay is also known (EP 0 960 999 A 1) which enables intermediate positions or gap ventilation positions by providing spring means which generate a spring force that is opposite to the tilt opening movement. These spring means act on the end of the sash-side fitting, which is held in a sliding guide and pivotable, and pre-tension it into a position corresponding to the closed state of the sash. The disadvantage of this known scissor-stay is that when the sash is tilted from the closed position into the tilted opening position, the force of the spring and also a not inconsiderable friction force must be overcome. The friction force in particular leads to a

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increased wear and intolerable noise. In addition, particularly with a higher sash weight, there is no safe intermediate position or gap ventilation position for the sash.

The aim of the innovation is to demonstrate a simplified gap ventilation device whose functional elements are concealed, i.e. not visually visible on the sash and the frame or on the functional elements of a scissor-stay. To solve this problem, a gap ventilation device is designed in accordance with claim 1.

The gap ventilation device according to the innovation can be implemented particularly easily and inexpensively. For example, a conventional type of scissor-stay requires only a gap ventilation spring as an additional functional element, which is then mounted on the fitting or on the faceplate, for example, and works together with a counter-latch, which is provided on the scissor-stay arm, for example. The counter-latch is preferably formed by a locking plate that is required on the scissor-stay arm anyway.

The gap ventilation spring only takes up a small amount of space and can be easily installed, especially as a retrofit part. Furthermore, the gap ventilation spring can be manufactured particularly easily and inexpensively as a molded plastic part, for example as an injection-molded plastic part.

Excessive friction and the associated excessive wear are avoided with the new design, as is intolerable noise. The usual, familiar operation of a sash or the tilt fitting or turn-tilt fitting provided on this sash is not changed by the new design, i.e. the usual operation is retained.

The invention is explained in more detail below using the figures as an embodiment. They show:

Fig. 1 shows a simplified representation of a tilt and turn window;

Fig. 2 and 3 each show a partial view and a top view (Fig. 2) and a side view (Fig. 3) of a scissor lift with integrated gap ventilation device

according to the innovation;
Fig. 4-7 in perspective view (Figure 4), in plan view (Figure 5), in side view (Figure 6) and in a partial section (Figure 7) a gap ventilation spring for use in the device of Figures 2

and 3;
Fig. 8 in a representation similar to Figure 5 a further embodiment of the

Gap ventilation spring for use with the device of Figures 2

and 3;
Fig. 9-12 a closing plate interacting with the gap ventilation spring for use in the device of Figures 2 and 3 in perspective view (Figure 9), in plan view (Figure 10), in front view (Figure 11) and in longitudinal section (Figure 12).

In the figures, 1 is the sash of a tilt-and-turn window which, with the aid of a suitable fitting (tilt-and-turn fitting), is provided in a frame or blind frame 2 so as to be pivotable about a vertical axis VA and tiltable about a horizontal axis HA.

Part of the fitting, which can be operated in a known manner via a handle 3, is, among other things, a tilt or projection scissor 4, which is provided in the upper horizontal rebate area of the sash 1 and the frame 2: The projection scissor 4 consists, in a known manner, of a projection arm 5, which is hinged at one end to the frame 3 by means of a bearing 6, among other things for pivoting around the axis VA. The other end of the projection arm 4 is slidably mounted approximately in the middle of the sash 1 on a faceplate 7 of the turn and tilt fitting mounted in the rebate of the sash and

pivotally guided, namely with the aid of a hinge or head bolt 8 provided at this end of the extension arm 5, which is guided in an elongated hole 9 forming a guide and extending in the longitudinal direction of the faceplate for pivoting and axial displacement in the direction of the longitudinal axis of the faceplate 7. The extension scissors 4 also have, in a known manner, an additional arm or lever 10, which is hinged at one end to the extension arm by means of a hinge bolt 11 and at the other end to the faceplate 7 by means of a hinge bolt 12 and, in the representation chosen for Figure 2, is located in a plane below the extension arm 5, but above the upper side 7.1 of the faceplate 7.

The tilt-and-turn fitting is designed as a drive rod fitting, i.e. a drive rod 13 is guided axially on the faceplate 7 and can be moved in the longitudinal direction of the faceplate for a stroke of a predetermined length. The drive rod 13 is located on the underside 7.2 of the faceplate facing away from the extension arm 5 and the additional arm 10 and is provided with several bolts 14 formed by pins, each of which protrudes through an elongated hole 15 over the top side 7.1 of the faceplate 7. Each bolt 14 is assigned a locking plate 16 attached to the underside of the extension arm 5 facing the faceplate 7.

In the embodiment shown, each locking plate 16 is a molded part made of a suitable material, for example metal or zinc injection molding, and is essentially designed as a rectangular plate that is rounded at one end or on a narrow side of the plate at 17. On the underside 16.1, the locking plate 16 has protruding, molded-on pins 18 that enable it to be attached to the extension arm 5 by riveting.

On the top side 16.2, each locking plate 16 is formed with a groove 19 extending in the longitudinal direction of this plate, which is open on the other narrow side of the plate and closed on the narrow side with the rounded portion 17. The associated bolt 14 engages in this groove 17 when the extension arm 5 is locked to the faceplate 7. The bolt 14 can be inserted into the

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Groove 19 can be inserted or moved out of it. On the outer surface of the rounded end 17, each locking plate 16 is provided with a recess 20 which, in the embodiment shown, is partially circular, specifically about an axis of curvature perpendicular to the plane of the underside of the locking plate 16. The locking plate 16 can also have two or more than two recesses 20 at the end 17, which are offset from one another in the transverse direction of the locking plate.

Each locking plate 16 is furthermore designed to be mirror-symmetrical to a central plane M1 which encloses the longitudinal axis of the rectangular locking plate and is oriented perpendicular to the plane of the underside.

When the sash 1 is closed and locked, the projection arm 5, additional arm 10 and faceplate 7 lie one above the other and each latch 14 engages its locking plate 16, whereby the projection arm 5 is locked to the faceplate in order to hold the sash 1 in the closed state or to be able to pivot about the axis VA. By moving the drive rod 13 accordingly, when the sash 1 is in the closed position, the locking plates 16 are released from the latches 14 so that the sash 1 can be tilted to open by pivoting the projection arm 5 relative to the faceplate 7 and by sliding the head bolt 8 in the slot 9. The maximum tilt position is reached when the head bolt 8 rests against the end of the slot 9 facing the additional arm 10.

In many cases it is now desirable not to tilt the sash 1 completely, i.e. into its maximum opening or tilt position, but rather into an intermediate position which lies between the closed position and the maximum tilt position and in which there is only a narrow ventilation gap between the frame and the sash. To make this possible, a gap ventilation spring 21 is attached to the top side 7.1 of the faceplate 7.

The design of this spring is shown in detail in Figures 4 - 5. In the embodiment shown, the gap ventilation spring 21 is a molded part made of a suitable tough and permanently elastic plastic. It consists of a spring body

22 with top side 23 and bottom side 24 as well as a lateral locking lug 25 formed on this spring body 22. The spring body 22 is designed in the embodiment shown as an approximately rectangular plate, namely in the representation of Figure 5 with a lower peripheral side 22.1, an upper peripheral side 22.2 and two long sides 22.3 and 22.4. The locking lug 25 is formed on the long side 22.4, which extends along this long side from the peripheral side 22.1 to the area of the peripheral side 22.2, within the planes of the top side

23 and underside 24 and is spaced from the longitudinal side 22.4, this distance increasing with increasing distance from the peripheral side 22.1.

The spring body 22 is designed in a partial area 22', which also has the peripheral side 22.1, such that the top side 23 and the bottom side 24 lie parallel to one another and are spaced apart from one another according to the thickness of the plate-shaped spring body. In a further partial section 22" adjoining the peripheral side 22.2 and having this peripheral side, the spring body 22 is slightly beveled on the top side 23 and bottom side 24, in such a way that the distance between the top side and bottom side in this partial section 22" decreases slightly starting from the peripheral side 22.2. The locking lug on the top and bottom is also shaped accordingly.

An opening 26 is provided on the section 22', which serves to fasten the gap ventilation spring 21 to the faceplate 7, for example by riveting or screwing. Furthermore, two blind holes 27 are formed on the section 22' in the top side 23 and in the bottom side 24, offset from the opening 26, which receive corresponding pins provided on the top side 7.1 for the torsion-proof fastening of the gap ventilation spring 21 to the faceplate 7.

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In the area of its free end, the locking lug 25 is provided with two bead-like notches 28 and 29, which are offset from one another in the longitudinal direction of the locking lug 25.

As Figures 4 - 7 further show, the gap ventilation spring 21 is designed to be mirror-symmetrical to a center plane M2 which runs in the middle between the top side 23 and the bottom side 24, so that the gap ventilation spring 21 can be used either for wings 1 which are opened when turned to the left or for those which are opened when turned to the right.

As shown in Figure 2, the gap ventilation spring 21 is attached with its partial section 22' to the top side 7.1 of the faceplate 7 in such a way that it protrudes with the partial section 22" and with the partial length of this locking lug that has the free end of the locking lug 25 over the long side of the faceplate 7 that faces the extension arm 5 when the sash 1 is tilted and forms an acute angle with it. The gap ventilation spring 21 is also attached in such a way that when the tilted sash 1 is closed, the locking lug 25 first engages the catch and then, when the catch 29 is closed further, engages the recess 20 of a locking plate 16. This results in two tilt or intermediate positions for the sash 1, in which only a reduced ventilation gap remains between the sash 1 and the frame 2, namely when the catch 28 engages in the counter catch or recess 20 a ventilation gap of greater width than when the catch 29 engages in the recess 20.

The gap ventilation spring 21 is also attached in such a way that the locking lug 25 faces the additional lever 10 as well as the joint formed by the head bolt 8 and the elongated hole 9. This orientation of the locking lug 25 has considerable advantages. When the sash 1 is tilted from its closed position into the open position or tilted position, the extension arm 5 is moved with one end in the elongated hole 9 in the direction of the gap ventilation spring 21, so that when a detent 28 or 29 engages, the engagement of this detent in the counter detent 20 is reinforced, while when the sash 1 is moved into the closed position by moving the extension arm

·

5 in the elongated hole, the disengagement of the catch 28 or 29 and the counter catch 20 is supported. This means that the gap ventilation spring 21 in the respective intermediate position reliably secures the sash 1, in particular against undesirable further opening (for example due to the sash weight).

Both in the final closed position and in the maximum tilted position, the gap ventilation spring 21 is disengaged from the counter-lock 20 formed on the associated locking plate 16.

In the closed position of the sash 1, the gap ventilation spring 21 or its spring body 22 are arranged between the extension arm 5 and the faceplate 7.

The at least one locking lug 25 is resiliently pivotable in a plane parallel to the top side 23 or bottom side 24 and thus, when the gap ventilation spring 21 is attached to the faceplate 7, in a plane perpendicular to the axis of the head bolt 8 or perpendicular to the pivot axis of the sliding pivot guide formed by this head bolt 8 and the elongated hole 9. This allows a sufficiently large spring travel for the locking lug 25 even when the extension scissors 4 are flat in an axial direction perpendicular to the top side 7.1 of the faceplate 7.

Figure 8 shows, in a representation similar to Figure 5, as a further possible embodiment, a gap ventilation spring 21a, which differs from the gap ventilation spring 21 only in that the spring body 22a there is narrower and the locking lug 25a corresponding to the locking lug 25 is shorter and has only one locking position, namely the locking position 28.

The design according to the invention has the advantage that essentially only a single component is required as a gap ventilation device, namely the spring 21 or 21a, for example made of plastic, and that a counter-lock for this spring

The existing locking plate can be used. Other advantages include very simple installation, including the option of retrofitting the gap ventilation device or the gap ventilation spring. The usual function and operation of the tilt-and-turn window or the corresponding fitting is retained, so that simple operation is possible that is also understandable for the user.

The innovation has been described above using exemplary embodiments. It is understood that numerous changes and modifications are possible without thereby departing from the inventive concept underlying the innovation.

It was assumed above that the gap ventilation spring 21 or 21a is attached to the faceplate 7. In principle, however, it is also possible to retrofit this spring, for example, to an already installed fitting and then screw it to the frame of the sash 1 through corresponding openings in the faceplate 7 and in the drive rod 13.

List of reference symbols

1 tilt and turn sash

2 frame

3 Handle

4 extension scissors

5 Extension arm

6 bearings

7 Faceplate

7.1 Top of the faceplate

7.2 Bottom of the faceplate

8 head bolts

9 Long hole

10 Additional arm

11, 12 Joint for additional arm

13 Drive rod

14 Latches or bolts

15 Slot for bolt 14 in the faceplate

16 Locking plate

16.1 Striker plate underside

16.2 Locking plate top

1 7 rounded end of the locking plate

18 fixing pins

19 grooves

20 Recess or counter-lock 21,21a Gap ventilation spring

22, 22a Spring body

22', 22" Part of the spring body

22.1, 22.2, 22.3, 22.4 Circumferential sides of the spring body

23 Top of the spring body

24 Bottom of the spring body

Locking lug Mounting hole Blind hole Locking center plane

Claims (20)

1. Gap opening device for a sash ( 1 ) of a building window or a building door provided in a frame or frame ( 2 ) so as to be at least tiltable, with a pivot arm ( 5 ) which can be fastened at one end to a first bearing ( 6 ) on the frame ( 2 ) and at the other end to a second bearing ( 7 , 8 , 9 ) on the sash, and with a locking member ( 21 ) acting between the pivot arm ( 5 ) and a fitting part (Z) of one of the bearings, which locks the sash ( 1 ) in at least one tilt position by locking, characterized in that
that the locking member is at least one gap ventilation spring ( 21 ) provided on the fitting part ( 7 ) and/or on the swivel arm ( 5 ) with a resilient locking lug ( 25 , 25a ) having at least one locking position ( 28 , 29 ), and
that at least one counter-latch ( 20 ) is provided on the swivel arm ( 5 ) or on the fitting part ( 7 ), into which the at least one latch ( 28 , 29 ) of the latching nose ( 25 , 25a ) spring-locks in the tilted position. 2. Gap opening device according to claim 1, characterized in that the pivot arm is an extension arm ( 5 ) of an extension scissor ( 4 ) limiting the tilting movement of the sash ( 1 ), and that the tilting position in which the gap ventilation spring ( 21 ) engages on the at least one counter-latch ( 20 ) is an intermediate position between a maximum tilting position of the sash ( 1 ) and a closed position of this sash ( 1 ). 3. Gap opening device according to claim 1 or 2, characterized in that at least one bearing, for example the second bearing, is a pivoting sliding bearing ( 8 , 9 ). 4. Gap ventilation device according to one of the preceding claims, characterized in that the gap ventilation spring ( 21 ) consists of a spring body ( 22 ) provided on the fitting part ( 7 ) or on the pivot arm ( 5 ) with a molded-on locking lug ( 25 , 25a ). 5. Gap ventilation device according to one of the preceding claims, characterized in that the at least one locking lug ( 25 , 25a ) is resiliently pivotable in a plane which is arranged perpendicular or almost perpendicular to a pivot axis of the second bearing ( 8 , 9 ). 6. Gap ventilation device according to one of the preceding claims, characterized in that the at least one locking lug ( 25 , 25a ) or the part of the gap ventilation spring ( 21 ) forming this locking lug protrudes over a longitudinal side of the fitting part ( 7 ) or of the extension arm ( 5 ), which (longitudinal side) projects into an angular space formed between the extension arm ( 5 ) and the fitting part ( 7 ) when the extension scissors ( 4 ) are in a state corresponding to the maximum tilt position of the sash ( 1 ). 7. Gap ventilation device according to one of the preceding claims, characterized in that the gap ventilation spring ( 21 ) is arranged between the extension arm ( 5 ) and the fitting part ( 7 ) when the extension scissors ( 4 ) are in a state corresponding to the closed sash ( 1 ). 8. Gap ventilation device according to one of the preceding claims, characterized in that the gap opening spring ( 21 ) is made in one piece from plastic, with a spring body ( 22 ) which can be fastened to the sash ( 1 ) or to the fitting part ( 7 ). 9. Gap ventilation device according to one of the preceding claims, characterized in that the at least one locking lug ( 25 , 25a ) extends along a peripheral side ( 22.4 ) of the spring body ( 22 ) or a partial section ( 22 ") of the spring body ( 22 ). 10. Gap ventilation device according to claim 9, characterized in that the partial section ( 22 ") of the spring body ( 22 ) together with the locking lug ( 25 , 25a ) protrudes beyond the longitudinal side of the fitting part ( 7 ) or of the extension arm ( 5 ). 11. Gap ventilation device according to one of the preceding claims, characterized in that the counter-lock is formed on a locking plate ( 16 ) of the extension arm ( 5 ), which cooperates with at least one latch ( 14 ) provided on the fitting part ( 7 ) for locking the extension arm ( 5 ) in a state corresponding to the closed leaf ( 1 ), the extension scissors ( 4 ). 12. Gap ventilation device according to one of the preceding claims, characterized in that at least two catches ( 28 , 29 ) are provided on the at least one catch lug ( 25 ) offset from one another in the catch lug longitudinal direction. 13. Gap ventilation device according to one of the preceding claims, characterized in that the gap ventilation spring ( 21 ) including spring body ( 22 ) and locking lug ( 25 , 25a ) is essentially plate-shaped. 14. Gap ventilation device according to one of the preceding claims, characterized in that the gap ventilation spring ( 21 ) is designed to be mirror-symmetrical to a center plane (M 2) extending between an upper side ( 23 ) and a lower side ( 24 ) of the spring. 15. Gap ventilation device according to one of the preceding claims, characterized in that at least one fastening opening ( 26 ) is provided in the spring body ( 22 ) and, offset from this, at least one further opening ( 27 ) for a pin or bolt provided on the fitting part ( 7 ) or on the extension arm ( 5 ) is provided. 16. Gap ventilation device according to one of the preceding claims, characterized in that the locking lug ( 25 ) has a thickness which reduces in a partial region towards the free end of the locking lug. 17. Gap ventilation device according to one of the preceding claims, characterized in that the spring body ( 22 ) in the partial section has a thickness which reduces towards a free edge ( 22.2 ) of this partial section. 18. Gap ventilation device according to one of the preceding claims, characterized in that the at least one catch ( 28 , 29 ) is provided on a side of the catch nose ( 25 , 25a ) facing the second bearing ( 8 , 9 ). 19. Gap ventilation device according to one of the preceding claims, characterized in that the fitting part ( 7 ) is a faceplate ( 7 ) of a tilt or turn-tilt fitting designed as a drive rod fitting. 20. Gap ventilation device according to one of the preceding claims, characterized in that at least two counter-latches are provided, preferably on the closing plate ( 16 ).