DE20203809U1 - Locking device for windows and / or doors - Google Patents

Abstract

Locking device comprises a housing fixed to a leaf frame (14) and containing a locking bolt which is moved in the direction of a locking plate fixed in a door/window frame (12). The housing has at least one stop device with which it is positioned in a rebate (15) between the lower transverse arm of the leaf frame and the door/window frame in the direction of a curved leaf part (17) and/or the leaf frame. Preferred Features: The housing has a first (26) and a second stop device (28) in the form of stop surfaces arranged perpendicular to each other. The first stop device is used for positioning against the surface of the leaf curved leaf part facing the rebate and the second stop device is used for positioning against the lower transverse arm of the leaf frame.

Description

02/09-DE-GM 05.03.2002/CO

Locking device
for windows and/or doors

The invention relates to a locking device for windows and/or doors, with a housing which can be fastened to a casement frame and in which a locking bolt is guided which can be moved in the direction of a striking plate which can be fastened to a frame for locking.

Such locking devices are used in windows of public buildings such as schools and hospitals, where it should be possible to ventilate the rooms by tilting the windows, but where turning the windows is not permitted for safety reasons. In these cases, however, it must still be possible for authorised persons with special opening devices to open the windows, for example to clean the outside window surfaces.

DE 101 08 177 A1 discloses a locking device with a locking bolt guided in a housing that can engage a locking plate, with the housing and the locking plate being attached to the sash frame or the window frame on the inside of the window. When locked, this prevents the window from being opened by turning, but tilting is still possible. The locking device is opened using separate opening means that only authorized persons have access to.

- 2 - 02/09-DE-GM

05.03.2002/CO

The disadvantage of such a locking device is that it affects the visual lines of the window because it is attached in the visible area of the sash or frame. In addition, for windows where the distance between the bottom edge of the sash and a window sill is less than the height of the locking device, installation is not possible due to space constraints.

In the case of windows with a pivoting sash frame, the weight of the sash frame can cause it to sag over time relative to the frame and thus jam during the closing movement. To compensate for this, a stop block is known from DE 82 18 086 Ul, which is arranged in the lower rebate area of the window and raises the sash frame back to its predetermined closing position when the sash frame is pivoted into the frame plane.

The invention is based on the object of developing a locking device of the type mentioned at the outset in such a way that it affects the optical lines of the window as little as possible and that it can also be used in windows in which the installation space between the lower edge of the sash frame and the window sill is very small.

To achieve this objective, the housing is provided with at least one stop means with which it can be positioned in a rebate space between the lower cross leg of the sash frame and the frame in the direction of a sash overlap and/or the sash frame. The stop means formed on the housing ensure a secure pre-assembly during assembly of the locking device on the window before final fastening.

- 3 - 02/09-DE-GM

05.03.2002/CO

continual positioning is guaranteed. Since the orientation is relative to the sash overlap and/or the sash frame, the locking device can be attached at any point along the longitudinal axis of the lower cross leg of the sash frame, preferably close to the strike plate that is already there. In particular, the positioning is largely independent of the design of the fittings installed in the sash frame. In addition, after installation, during later use in the window, the stop means prevent the locking device from tilting and the flow of force between the locking device and the sash frame is evened out. Due to the positioning in the rebate space, the locking device is no longer visible from the inside of the window and therefore does not disrupt the visual lines of the window. Even if the installation space between the lower edge of the sash frame and the window sill is very small, this is no longer a disadvantage due to the changed installation position within the rebate space.

In a further development of the invention, according to claim 2, the housing has a first and a second stop means formed on the housing in the form of stop surfaces, wherein the stop means are oriented at right angles to each other and the first stop means can be used for positioning relative to the surface of the sash overlap facing the rebate space and the second stop means can be used for positioning relative to the lower cross leg of the sash frame. Due to the one-piece connection of the stop means with the housing, they can be formed directly out of the housing without great construction effort. The design as essentially flat stop surfaces has the advantage that housing contours that are necessary anyway can be

- 4 - 02/09-DE-GM

05.03.2002/CO

only minor adjustments or orientations to each other can be used functionally in addition to their housing function. Due to the right-angled arrangement of the first and second stop elements to each other, they are precisely adapted to the contour of the sash frame in the rebate space, since there is also usually a corresponding angle of 90° between the lower cross leg of the sash frame and the surface of the sash overlap facing the rebate space.

In a further embodiment of the invention, according to claim 3, the housing has holes for receiving screws and can be supported on the sash overlap via the first stop means and can be screwed to it, wherein the housing can be supported on the sash frame and/or on a drive rod fitting connected to the sash frame with the second stop means. The screw connection between the locking device and the sash overlap can be made in such a way that the screws are inserted from the rebate space side through the holes in the housing to the sash overlap or other components connected to it. It is not necessary to screw it directly to the sash frame or even to pass a screw through an elongated hole in the drive rod fitting. The housing only rests loosely on the sash frame or the drive rod fitting and can support itself against it when force is introduced.

In a further development of the invention, according to claim 4, the locking bolt is connected to a handle shaft and can be actuated via this by an operating element which is connected to the handle shaft, wherein the longitudinal axis of the handle shaft is perpendicular to the

- 5 - 02/09-EN-GM

05.03.2002/CO

Longitudinal axis of the locking bolt and the handle shaft can be guided through an opening in the sash overlap. The handle shaft serves as a connecting link between the locking bolt and the operating element. Since the locking bolt and the housing are located in the rebate space and the operating element must be arranged on the side of the window facing the interior of the room, the opening in the sash overlap serves to connect these two components, with the handle shaft being guided through the opening. By positioning the handle shaft perpendicular to the longitudinal axis of the locking bolt, with the longitudinal axis of the locking bolt running parallel to the longitudinal axis of the lower cross leg, the handle shaft can be guided through the sash overlap.

In a further embodiment of the invention, according to claim 5, the locking bolt is mounted in the housing so that it can rotate about an axis of rotation that is transverse to its longitudinal axis and is connected to the handle shaft in one piece in such a way that the axis of rotation of the locking bolt coincides with the longitudinal axis of the handle shaft. By means of a locking bolt mounted so that it can rotate in this way, the bearing of the locking bolt and the bearing of the handle shaft are integrated, which reduces the number of bearing points in the housing.

In a further development of the invention, according to claim 6, the locking bolt is guided in the housing so that it can move longitudinally along its longitudinal axis and the drive connection between the locking bolt and the handle shaft is made via a toothing, whereby the handle shaft has a circular external toothing and the locking bolt has a straight toothing area. Due to the longitudinal guide, when the pivot bearing is in relation to the pivot bearing,

- 6 - 02/09-EN-GM

05.03.2002/CO

A more space-efficient design is possible overall thanks to the slightly more complex bearing, as the longitudinal guide means that no pivoting space outside the housing is required for the otherwise pivoting locking bolt, which can now be moved directly in the direction of the strike plate. The external toothing of the handle shaft and the straight, rack-like toothing area of the locking bolt enable the rotary movement of the handle shaft, which is initiated by the operating element, to be converted into a straight movement of the locking bolt in the direction of the strike plate.

In a further embodiment of the invention, according to claim 7, the housing is designed in one piece with an opening on opposite sides for the passage of the locking bolt, whereby the locking bolt can be guided through one of the openings to ensure left/right usability. The left/right usability is achieved by changing the mounting orientation of the locking bolt within the housing, whereby it is easy to swap even after the locking device has been mounted by removing the locking bolt and inserting it into the other opening.

In a further development of the invention, according to claims 8, 9 and 10, it is provided that the operating element is mounted in an operating element holder connected to the wing overlap and is spring-loaded and can be displaced in the direction of the longitudinal axis of the handle shaft, and that the operating element has a tool holder for an operating tool for longitudinal displacement and rotation and, in the connection area with the operating element holder, a locking device for locking in at least one end position, wherein the operating element can be screwed to the housing,

- 7 - 02/09-EN-GM

05.03.2002/CO

and the screws can be guided through holes in the sash overlap. This ensures that the operating element and thus ultimately the locking bolt can only be operated by authorised persons with the appropriate operating tool, and certainly not entirely without tools and with bare hands.

In a further embodiment of the invention, according to claim 11, the housing has a run-on surface for running onto a frame area, the run-on surface having a flat support area for holding the sash frame at a fixed height relative to the frame and a lifting area angled and/or rounded from this for lifting the sash frame relative to the frame. Due to the run-on surface integrated into the housing, the locking device fulfils the function of a run-on block in addition to its locking function due to its shape alone and without additional components required, thus reducing the assembly effort due to the reduction in individual parts. When the window is closed, the support area holds the sash evenly in the closed position, while the lifting area causes a uniform lifting from the sagging position to the closed position during the pivoting movement of the sash frame into the frame. The lifting area can be designed either wedge-shaped with a surface that is only rounded relative to the run-on surface or convexly rounded for a non-linear lifting movement. Through the combination of lifting area and support area, during the pivoting movement of the sash frame into the frame plane, it is first lifted by the lifting area from a sagging height to the closing height and is then held at this height by the support area.

- 8 - 02/09-EN-GM

05.03.2002/CO

In a further development of the invention, according to claim 12, the run-up surface in the lifting area and/or support area has at least one rotatable roller to reduce friction with the frame area. This reduces the friction between the run-up surface and the frame area and also simplifies handling for the user, while also reducing wear.

In a further embodiment of the invention, according to claim 13, the housing is designed in two parts with a first housing part and a second housing part and, when assembled, has openings on opposite sides for the passage of the locking bolt, the length of the locking bolt in the longitudinal direction being greater than the length of the housing. Because the locking bolt emerges from the housing through one of the two openings depending on the position, it can be used left/right without any conversion measures on the locking device.

The invention is explained in more detail using the following exemplary embodiment.

Fig. 1 A sectional view through a window with a locking device built into it;

Fig. 2 is a perspective view of the locking device and a strike plate;

Fig. 3 is a perspective view of the locking device according to Fig. 2 with a strike plate, shown partially in section;

- 9 - 02/09-EN-GM

05.03.2002/CO

Fig. 4 is a three-dimensional view of the locking device according to Fig. 2 from a different perspective;

Fig. 5 is a plan view of the locking device according to Fig. 2;

Fig. 6 is a sectional view of the locking device according to Fig. 5, cut along the line I-I;

Fig. 7 is a sectional view of the locking device according to Fig. 5, cut along the line H-II;

Fig. 8 is a three-dimensional representation of a window in a tilted position;

Fig. 9 is a spatial representation of an alternatively designed locking device.

Fig. 1 shows a door or a window 10 in a sectional view, as it or it can be installed in a brickwork of a house (not shown) and fitted with a window pane (also not shown). The window 10 consists, among other things, of a stationary frame 12 and a sash frame 14 that can be rotated and/or tilted relative to it. A locking device 16 is attached to the sash frame 14 within the rebate space 15 between the sash frame and the frame, which is driven by an operating element 18 arranged on the side facing the interior of the house, which is arranged on the sash overlap 17. The sash frame 14

· ·■

- 10 - 02/09-EN-GM

05.03.2002/CO

There is a groove 19 in which a drive rod fitting (not shown) can be inserted. The locking device 16 can be used, among other things, in windows in public buildings such as schools and hospitals, where on the one hand it should be possible to ventilate the rooms by tilting the windows, but on the other hand turning the windows open is not permitted for safety reasons. In these cases, however, turning the windows must still be guaranteed for authorized persons with special opening devices, for example to clean the outer window surfaces from the inside of the room.

Fig. 2, 3, 4 and 5 show the locking element 16 and a striking plate 20 in different views, detached from the window 10. When installed, a housing 22 of the locking element 16 is connected to the sash frame 14 and the striking plate 20 is connected to the frame 12. The housing 22 is manufactured as a one-piece metallic component, for example by a die-casting process. A locking bolt 24 is guided longitudinally in the housing 22 and can be moved in the direction of the striking plate 20 for locking and can engage behind it for closing. To position the housing 22 relative to the sash frame 14, the housing is equipped with a first stop means 26 and a second stop means 28, the first stop means 26 being provided for positioning relative to the sash overlap 17 and the second stop means 28 being provided for positioning relative to the lower cross leg of the sash frame 14. In addition to the positioning function, forces which are applied to the locking device 16, for example via the strike plate 20, are transmitted to the sash frame via the stop means 26 and 28.

- 11 - 02/09-EN-GM

05.03.2002/CO

To fix the housing 22 to the overlap of the sash frame, the latter is provided with holes 30 for receiving screws (not shown) that can be inserted through the housing and screwed to a thread 32 of a control element holder 34. The housing 22 is thus supported relative to the sash overlap 17 via the stop means 26 and screwed via the screws, whereas relative to the sash frame 14 it is only loosely supported via the stop means 28.

As can be seen from Fig. 3 and 6, the locking bolt 24 is connected to a handle shaft 36, whereby the handle shaft has an external toothing. The locking bolt 24 has a straight toothing area 38 which can be brought into engagement with the toothing of the handle shaft 36 and thus converts a rotation of the handle shaft 36 into a translational movement of the locking bolt 24. The handle shaft 36 is driven via the operating element 18 visible in Fig. 4, which is accommodated by the operating element holder 34. The handle shaft 36, as can be seen from Fig. 1, is guided through an opening 35 in the sash overlap.

As can be seen in Fig. 7, the operating element 18 can be moved within the operating element holder 34 by a spring 40, whereby the spring presses the operating element with the operating element stop edge 42 against the operating element holder stop edge 44 and holds it in this position. The operating element can be moved against the spring force into the interior of the operating element holder 34 by means of an operating tool (not shown) that can be inserted into a tool holder 46 of the operating element 18. The spring 40 is located inside the operating element.

- 12 - 02/09-EN-GM

05.03.2002/CO

Longitudinal displacement is ensured by the toothing 48, which corresponds to the toothing of the handle shaft 36. By rotating the operating element 18 about the longitudinal axis of the handle shaft 36, the handle shaft 36 also rotates via the toothing 48, which in turn leads to a displacement of the locking bolt 24. The rotary movement of the operating element 18 can be fixed in end positions offset by 180° by the locking device 50 shown in Fig. 4.

As can be seen in Fig. 6, the housing 16 is designed in one piece and has an opening 52 and 54 on opposite sides. A housing channel 56 is formed within the housing 16, in which the locking bolt 24 is guided. To ensure that the locking device 16 can be used on the right or left, it is possible to arrange the locking bolt 24 within the housing 16 in such a way that it emerges from the housing 16 either through the opening 52 or through the opening 54. The locking device 16 can therefore be used on the right or left by simply repositioning the locking bolt 24.

The sash frame 14 can be rotated relative to the frame 12 about the rotation axis 58 or tilted about the tilt axis 60. The locking device is not immediately visible in Fig. 8, which shows the window viewed from the inside of the room, since it is arranged in the rebate space 15 between the lower cross leg 62 of the sash frame 14 and the frame 12. Only the control element holder 34 and the control element 18 can be seen from the inside of the room. Fig. 8 shows the function of the locking device 16 on the window 10. When opened

- 13 - 02/09-EN-GM

05.03.2002/CO

In the locked state of the locking device 16, i.e. when the locking bolt 24 does not engage behind the strike plate 20, the sash frame 14 can be rotated about the rotation axis 58 or tilted about the tilt axis 60 relative to the frame 12 via the handle olive 64 and a drive rod system 66 connected to it. In the locked state of the locking device 16, i.e. when the locking bolt 24 engages behind the strike plate 20, as corresponds to the illustration in Fig. 2, the sash frame 14 can still be tilted relative to the frame 12. However, when the handle 64 is brought into the rotation position and the drive rod system 66 releases the casement frame 14 for rotation, the locking device 16 blocks the casement frame 14 by engaging the locking plate 20 with the locking bolt 24. To rotate the casement frame 14, the locking device 16 must therefore first be opened. To open the locking device 16, a separate operating tool is required, so that the casement frame 14 can only be rotated by authorized persons.

In addition to the locking function described above, the locking device 16 can be expanded to include a run-up function. For this purpose, the housing 22 is provided with a run-up surface 68, visible in Fig. 7, for running onto a run-up area 70 of the frame 12, visible in Fig. 1. The run-up surface consists of a support area 72 for holding the sash frame 14 at a fixed height relative to the frame and a lifting area 74 rounded off by this for lifting the sash frame 14 relative to the frame 12. The lifting takes place when the sash frame 14 is pivoted into the plane of the frame 12.

- 14 - 02/09-EN-GM

05.03.2002/CO

Since the housing 22 is made of a metallic material, the run-up area 70 can, depending on the material of the frame 12, be part of the frame or consist of an auxiliary component connected to it. The auxiliary component can in turn consist of a metallic material. Furthermore, particularly in the case where the frame is made of a plastic material, a cover for the housing 22, also made of a plastic material, can alternatively be provided, at least in the run-up area 70, in order to reduce wear. Furthermore, in order to reduce the friction between the run-up surface 68 and the run-up area 70 of the frame, it is also possible to provide the run-up surface 68 with a rotatable roller.

Fig. 9 shows an alternative design of the locking device with a housing consisting of two housing halves 23a, 23b. To ensure left/right usability, the locking bolt 25 is longer than the housing 23, which can be seen in Fig. 9 from the fact that it is flush on the right-hand side of the housing and protrudes beyond the housing on the left-hand side of the housing in order to engage with the locking plate (not shown). In the case where the locking plate is to the right of the housing in Fig. 9, no conversion measures are required on the locking device, but rather there is simply a different switching position for locking.

Claims (13)

1. Locking device for windows and/or doors, with a housing ( 22 ) which can be fastened to a sash frame ( 14 ) and in which a locking bolt ( 24 ) is guided which can be moved for locking in the direction of a striking plate ( 20 ) which can be fastened to a frame ( 12 ), characterized in that the housing ( 22 ) has at least one stop means ( 26 , 28 ) with which it can be positioned in a rebate space ( 15 ) between the lower transverse leg ( 62 ) of the sash frame ( 14 ) and the frame ( 12 ) in the direction of a sash overlap ( 17 ) and/or the sash frame ( 14 ). 2. Locking device according to claim 1, characterized in that the housing ( 22 ) has a first ( 26 ) and a second ( 28 ) stop means formed on the housing ( 22 ) in the form of stop surfaces, wherein the stop means ( 26 , 28 ) are oriented at right angles to one another and the first stop means ( 26 ) can be used for positioning relative to the surface of the sash overlap ( 17) facing the rebate space (15 ) and the second stop means ( 28 ) can be used for positioning relative to the lower transverse leg ( 62 ) of the sash frame ( 14 ). 3. Locking device according to claim 1, characterized in that the housing ( 22 ) has bores ( 30 ) for receiving screws and can be supported on the sash overlap ( 17 ) via the first stop means ( 26 ) and can be screwed to it, wherein the housing ( 22 ) can be supported on the sash frame ( 14 ) and/or on a drive rod fitting connected to the sash frame with the second stop means ( 28 ). 4. Locking device according to one of the preceding claims, characterized in that the locking bolt ( 24 ) is drive-connected to a handle shaft ( 36 ) and can be actuated via this by an operating element ( 18 ) which is connected to the handle shaft ( 36 ), wherein the longitudinal axis of the handle shaft ( 36 ) is located perpendicular to the longitudinal axis of the locking bolt ( 24 ) and wherein the handle shaft ( 36 ) can be guided through an opening ( 35 ) of the sash overlap ( 17 ). 5. Locking device according to one of the preceding claims, characterized in that the locking bolt is mounted in the housing so as to be rotatable about an axis of rotation located transversely to its longitudinal axis and is integrally connected to the handle shaft in such a way that the axis of rotation of the locking bolt coincides with the longitudinal axis of the handle shaft. 6. Locking device according to one of claims 1 to 4, characterized in that the locking bolt ( 24 ) is guided longitudinally movable along its longitudinal axis in the housing ( 22 ) and the drive connection between the locking bolt ( 24 ) and the handle shaft ( 36 ) is made via a toothing, wherein the handle shaft ( 36 ) has a circular external toothing and the locking bolt ( 24 ) has a straight toothing region ( 38 ). 7. Locking device according to one of the preceding claims, characterized in that the housing ( 22 ) is designed in one piece with an opening ( 52 , 54 ) on opposite sides for the passage of the locking bolt ( 24 ), wherein the locking bolt ( 24 ) can be selectively guided through one of the openings ( 52 , 54 ) to ensure left/right usability. 8. Locking device according to one of the preceding claims, characterized in that the operating element ( 18 ) is mounted in an operating element receptacle ( 34 ) connected to the wing overlap ( 17 ) and is spring-loaded and displaceable in the direction of the longitudinal axis of the handle shaft ( 36 ). 9. Locking device according to claim 8, characterized in that the operating element ( 18 ) has a tool holder ( 46 ) for an operating tool for longitudinal displacement and rotation and, in the connection area with the operating element holder ( 34 ), a locking device ( 50 ) for locking in at least one end position. 10. Locking device according to one of the preceding claims, characterized in that the operating element ( 18 ) can be screwed to the housing ( 22 ), wherein the screws can be guided through holes in the wing overlap ( 17 ). 11. Locking device according to one of the preceding claims, characterized in that the housing ( 22 ) has a run-on surface ( 68 ) for running onto a frame area ( 70 ), wherein the run-on surface ( 68 ) has a flat support area ( 72 ) for holding the sash frame ( 14 ) at a fixed height relative to the frame ( 12 ) and a lifting area ( 74 ) angled and/or rounded therefrom for lifting the sash frame ( 14 ) relative to the frame ( 12 ). 12. Locking device according to claim 11, characterized in that the run-up surface ( 68 ) in the lifting area ( 74 ) and/or support area ( 72 ) has at least one rotatable roller for reducing the friction with the frame area ( 70 ). 13. Locking device according to one of claims 1-6 or 8-12, characterized in that the housing ( 23 ) is designed in two parts with a first housing part ( 23a ) and a second housing part ( 23b ) and in the assembled state has openings ( 53 , 55 ) on opposite sides for the passage of the locking bolt ( 25 ), wherein the length of the locking bolt ( 25 ) in the longitudinal direction is greater than the length of the housing ( 23 ).