DE29511734U1 - Device for opening a window sash - Google Patents

Description

10

Device for opening a window sash

TECHNICAL AREA

The invention relates to a device for opening a window sash, which is pivotably attached to a window frame. The window sash can be used, for example, as a ventilation flap or for smoke extraction.

STATE OF THE ART

Known adjustment devices for swinging a window sash open from a window frame have a piston or rack that can be moved back and forth using a cylinder, for example. The free end of this rod is attached to the window sash. When the window sash is closed, the rack is aligned almost perpendicularly to the plane of the window sash. As a result, it protrudes relatively obstructively into the room or hall space below the window sash. Due to the swinging movement of the window sash, the rod that swings the window sash open and closed must also be mounted in an articulated manner. To ensure that the rod does not hit the frame below the window sash when it moves back and forth, it must be mounted at a sufficiently large distance.

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DESCRIPTION OF THE INVENTION

The invention is based on the object of specifying an improved device for opening a window sash of the type mentioned at the beginning, in which the adjustment device is present on the window sash or window frame in a way that is as unobtrusive as possible.

FlTA-06gDE
July 19, 1995

The invention is defined by the features of the main claim. Based on the device known in the prior art for opening a window sash that is pivotably attached to a window frame, the device according to the invention is characterized by the features further specified in the characterizing part of the claim. The invention thus uses the knowledge that the adjustment device can be installed in the least disruptive way possible if its position-adjustable body that causes the pivoting open can be adjusted parallel to the plane of the window frame rather than transversely.

According to an essential embodiment of the invention, the body comprises at least one carriage that can be moved back and forth in the longitudinal direction, i.e. parallel to the plane of the window frame, and at least one roller attached to the carriage. The carriage and roller then rest on a contact surface of the window sash on the one hand and on a contact surface of the window frame on the other.

In order to place as little strain as possible on the weight of the pivoting window sash caused by the adjustment device, the slide is preferably held on the window frame. As a result, the sliding surface along which the slide can be moved is formed on a frame leg of the window frame. It has proven to be useful to provide the sliding surface on the lateral inner surface of a frame leg. The parts of the adjustment device present in the area of the window frame can thus be arranged laterally next to the frame leg or legs of the window frame. The device equipped with the adjustment device according to the invention for pivotally opening a window sash is therefore visually hardly disturbing. Only the contact surface for the roller needs to be provided on the window sash, which only minimally increases the total weight of the window sash. This contact surface for the roller can be designed according to the

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July 19, 1995 .· ; J ' &iacgr;&idigr; ! * **!

The sliding surface for the carriage should also preferably be arranged on the inner side surface of the window sash.

In order to achieve the pivoting movement by moving the slide longitudinally, the two contact surfaces, on the one hand of the window sash and on the other hand of the window frame, are preferably not aligned parallel to each other. If the two contact surfaces, on the one hand of the window sash and on the other hand of the window frame, are aligned parallel to each other, a pivoting movement could be achieved by moving these two parts, i.e. on the one hand the slide and on the other hand the roller, away from each other in the pivoting direction when the slide and roller are adjusted longitudinally. The pivoting speed then no longer depends on the travel speed of the slide; a movement of the roller relative to the slide in the direction of the pivoting movement also causes the window sash to pivot open or closed.

&igr; A technically simple embodiment for a roller that can be moved relative to the carriage can be achieved by attaching the roller to an articulated arm that is articulated on the carriage. By providing a run-on slope for the articulated arm, the articulated arm can then be attached at the desired location, for example at the end of the carriage's travel movement, in such a way that the articulated arm that runs along the run-on slope can be pivoted relative to the sliding surface and the roller can thus be moved away from the carriage in the pivoting direction. This can increase the pivoting movement of the window sash. A corresponding embodiment for a corresponding run-on slope is shown in the drawing.

Just like the carriage, the motor drive that drives the carriage is preferably arranged next to the inner side surface of the window frame. This also

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FITA-O6gDE
July 19, 1995

The motor drive is present in the area of the window sash to be opened and causes little disruption.

This motor drive can be an electric or pneumatic drive. Due to a very high gear ratio for the longitudinal displacement of the slide, an electrical supply voltage of either 24 volts or 230 volts can be used as the drive.

Further features and advantages of the invention result from the features further specified in the subclaims and from the following embodiment.

! SHORT DESCRIPTION OF THE DRAWING

The invention is described and explained in more detail below using the embodiment shown in the drawing. The drawing shows:

Fig. 1 is a perspective top view of a window sash pivoted halfway away from a window frame, in which the device according to the invention is provided for opening the window sash,

Fig. 2 is a partial side view of the partially opened window sash according to Fig. 1,

Fig. 3 a view similar to Fig. 2, in which the window sash is almost completely opened,

Fig. 4 is a partial side view of the device according to the invention, which is the left continuation of Fig. 3,

Fig. 5 is a partial longitudinal view of the sliding carriage of the device according to the invention and

FITA-O6gDE

19 July 1995 .· ; : ·: : : - ··: :

Fig. 6 a partial side view of the closed window sash.

WAYS TO CARRY OUT THE INVENTION

Within a roof surface 10 there is a surrounding window frame 12, which is composed of four merely indicated frame legs 14, 16, 18, 20.

A hinge 25 is attached to the rear frame leg 20 in Fig. 1 and to the frame profile 22 of a window sash 23 located above it, such that the window sash 23 can be pivoted about a pivot axis 27 running parallel to the longitudinal direction of the frame leg 20. The window sash 23 can thus be pivoted into the OPEN position shown in Fig. 1.

The window sash 23 also consists of four frame-like frame profiles 22, 24, 26, 28, which frame a glazing 30.

On the lateral inner side of the two frame legs 14, 18 of the window frame 12, which are aligned transversely to the pivot axis 27, a bearing block 34 (Fig. 2) and 36 (Fig. 6) protruding into the interior 32 of the window frame 12 are attached in their two end areas. In these two bearing blocks 34, 36 of each frame leg 14, 18, both a threaded spindle 38 and a guide rail 40 are held. The threaded spindle 38 and the guide rail are aligned parallel to one another and run in the longitudinal direction of the respective frame leg 14, 18.

A slide 42 is mounted on the guide rail 40 so that it can be moved longitudinally. In its base 44, the slide 42 has a hole through which the threaded spindle 38 is screwed. By turning the threaded spindle 38, the

FITA-OSgDE
July 19, 1995

by means of the foot 44 and thus the slide 42 can be moved back and forth in the longitudinal direction of the threaded spindle 38. Instead of one slide, several, such as two slides one behind the other, could be provided. Both slides could be screwed onto the same threaded spindle. This would allow several forces to act simultaneously at different points on a window sash that is to be pivoted.

The threaded spindle 38 is driven by a toothed wheel 41 that is attached to the threaded spindle 38 in the area of the bearing block 36 in a rotationally fixed manner. On the inside of the frame leg 16, also pointing into the interior 32, there is a motorized rotary drive 46. This rotary drive 46 is connected to the toothed wheel 41 by means of an endlessly rotating drive belt (drive chain) 43. This drive belt 43 thus runs endlessly along the inside of the frame leg 16. In the present case, this drive belt 43 runs both in the area of the frame leg 14 and in the area of the opposite frame leg 18 and, by means of corresponding wheels 41, drives both the threaded spindle 38 in the area of the frame leg 14 and the threaded spindle in the area of the frame leg 18 in the same direction and with the same force. In addition to the drive roller 48 driven by the motor drive 46 in the middle area of the frame leg 16, there are two deflection rollers 50, 52 on the side of the roller 48 for keeping the drive belt 43 taut.

Instead of arranging the motor drive 46 and the drive belt 43 on the inside of the frame leg 16, the drive could also be provided on the inside of the opposite frame leg 20 of the window frame 12. Arranging the drive in the area of the frame leg 16 enables good accessibility to it, while arranging the drive 46 in the area of the frame

FITA-O6gDE
July 19, 1995

leg 20 and thus in the vicinity of the pivot axis 27 makes it optically less visible.

A roller 60 is rotatably attached to the carriage 42. This roller 60 presses from below against a leg 62 of a U-profile 64 of different heights. The other leg 66 of this U-profile is attached laterally in the frame profile 24 of the window sash 23, which is arranged above the frame leg 14. In the same way, a U-profile 64 pointing into the interior 32 is also present on the frame profile 28 of the window sash 23, which is arranged above the other frame leg 18 of the window frame 12. The leg 62, which rests with its lower surface 70 on the roller 60 from above, has a different height 68. Depending on which area of the leg 62 rests on the roller 60 from above, the frame profile 24 and thus the window sash 23 has a different pivoting position relative to the window frame 12.

The roller 60 is held indirectly on the carriage 42 via an articulated arm 72. The joint 74 of this articulated arm 72 allows a pivoting movement of the articulated arm 72 about an axis 76 of the joint 74, which runs parallel to the pivot axis 27 of the window sash 23.

i The articulated arm 72 is held in its lower position in Fig. 2 by the weight of the window sash 23 resting on the roller 60. The articulated arm 72 has this position as it slides along the guide rail 40 up to an end region shown in Fig. 3. There, the articulated arm 72, with a roller 80 attached to it, runs onto a guide piece 82 as the carriage 42 moves. This guide piece 82 has an inclined surface 83, which is aligned at an angle to the orientation of the surface 70 of the leg 62 resting on the roller 60. Towards the end of the swinging-open movement of the window sash 23 (Fig. 3),

19 July 1995

the articulated arm 72 pivots in an anti-clockwise direction and thereby pivots the window sash 23 further open in a clockwise direction around the pivot axis 27. The leg 62 of the U-profile 64, which has different heights, therefore does not need to be made any higher at its end area directed towards the pivot axis 27. A design of the leg 62 with an even greater height 68 would in fact allow the lower surface 70 of the leg 62 of the U-profile 64 to protrude downwards from the clearance of the window frame 12 when the window sash 23 is closed.

The leg 62 of the U-profile 64 is provided with a 180° bend 86 in its end region 84 opposite the pivot axis 27. When the window sash 23 is closed, the roller 80 thus engages in a bag-like opening 88. The window sash 23 is thus mechanically held or locked in a simple manner against accidental pivoting open.

In the present case, the surface 70 of the leg 62 of the U-profile 64, which engages with the roller 60, is designed to be straight over a wide area. However, it is also possible to design this surface in an arc shape or to make it straight in sections and then arc shape again. In conjunction with the inclined surface 83 of the end-mounted link piece 82, this allows the size of the pivoting movement of the window sash 23 to be influenced as desired depending on the longitudinal movement of the slide 42. The longitudinal movement of the slide can also be varied independently of the motor drive, for example by making the thread pitches of the threaded spindle differently steep, at least in sections. Towards the end of the threaded spindle, its thread pitches could become flatter. This could, for example, achieve a uniform load on the motor drive along the pivoting path, even in the end area of the pivoting movement.

July 19, 1995 .·'::*::: · ^# ·: :

The present invention has the particular advantage that the ratio between the size of the drive force and the size of the swivel path can be varied depending on the respective swivel position. 05 This means that even comparatively large forces can be moved without any problem.

Claims (1)

FITA-06gDE .".,··. ;*";**; 19 July 1995 ·'· :*; : : « ··· -1- EXPECTATIONS 01) Device for opening a window sash (23) which is pivotably mounted on a window frame (12), with - an adjustment device by means of which the window sash (23) can be brought into its different pivoting positions, characterized in that - at least one body (42, 60) which simultaneously rests on a contact surface (70) of the window sash (23) and on a contact surface (40) of the window frame (12) is positionally adjustable in the longitudinal direction of a frame leg (14, 18) of the window frame (12), - this frame leg (14, 18) is aligned transversely to the pivot axis (27), - the contact surface (70) of the window sash (23) and the contact surface (40) of the frame leg (14, 18) are not aligned parallel to each other. 02) Device according to claim 1, characterized in that - the body comprises at least one carriage (42) which can be moved back and forth in the longitudinal direction and at least one roller (60) fastened to the carriage, - the carriage (42) is held on a contact surface designed as a sliding surface, - the roller (60) can roll along the other contact surface designed as a rolling surface. 03) Device according to claim 2, characterized in that - the sliding surface is present on the lateral inner surface of a frame leg (14, 18) of the window frame. FiTA-O 6gDE . * ;;; &iacgr; i .'····· 19 July 1995 .· ! I * IC ! * '** -2- 04) Device according to claim 3, characterized in that - the rolling surface is present on the lateral inner surface of the frame profile (24, 28) of the window sash (23). 05) Device according to one of the preceding claims, characterized in that - in the closed state of the window sash (23) -- the sliding surface is aligned parallel to the abutment surface between the window sash and the frame leg of the window frame, at least in a partial section, -- the rolling surface is aligned obliquely to this abutment surface, at least in this partial section. 06) Device according to claim 2, characterized in that - the roller (60) is held on the carriage (42) in an adjustable position such that, depending on the position of the carriage (42), the roller (60) can be moved transversely to the sliding direction of the carriage. 07) Device according to claim 6, characterized in that - the roller (60) is attached to an articulated arm (72) which is articulated on the carriage, - a starting slope (84) for the articulated arm (72) is provided so that the articulated arm (72) with the roller (60) attached to it can be moved transversely to the sliding direction of the carriage (42). i 08) Device according to claim 1, characterized in that - a motor drive (46) is provided for adjusting the position of the body (42). 1995 -3- 09) Device according to claim 8, characterized in that - an electric or pneumatic drive (46) is present. 10) Device according to claim 9, characterized in that - the drive (46) can be operated with an electrical supply voltage of 24 volts or 230 volts. 11) Device according to claim 8, characterized in that - the motor drive (46) is arranged on a lateral inner surface of the window frame (12). 12) Device according to claim 1 or 8, characterized in that - the adjustable body (42) is located next to the lateral inner surface of the frame leg (14, 18), which is aligned transversely to the pivot axis (27). 13) Device according to one of the preceding claims, characterized in that I - a threaded spindle (38) is screwed through the body (42), - the threaded spindle (38) is connected in a rotationally fixed manner to a toothed wheel (41) which is connected in a rotationally fixed manner to a motor drive (46) by means of a rotating drive belt (43). 14) Device according to one of the preceding claims, characterized in that - there are two bodies that can be moved back and forth in the longitudinal direction and are arranged one behind the other in the longitudinal direction. FITA-OögDE ·' ·; · J · „* JJt.. 19 July 1995 . / · : * II &idigr; * **t I -4- 15) Device according to claim 14, characterized in that j two slides are arranged one behind the other in the longitudinal direction and can be driven by the same threaded spindle. 16) Device according to one of the preceding claims, characterized in that the thread pitches of the threaded spindle are at least partially differently steep. 17) Device according to claim 16, characterized in that the thread pitches towards the end of the opening movement of the window sash are smaller than at the beginning of the opening movement.