Rotary wing drive system and method for operating a rotary wing drive system

Abstract

The present invention relates to a pivot drive system (10, 10') for a pivot leaf (12) of a door or window (14), in particular a fire door or fire window, wherein the pivot leaf (12) is pivotable between an open position (18) and a closed position (20), wherein the pivot drive system (10, 10') is operable in at least a first operating mode and a second operating mode, wherein the pivot drive system (10, 10') comprises: a drive device (26) configured to apply a torque to the pivot leaf (12) at least in one opening direction (22), wherein the pivot leaf (12) is pivotable in the opening direction (22) from the closed position (20) to the open position (18); a sensor device (42) configured to acquire sensor information,which is representative of a position and / or a change in position of the pivoting sash (12) at least in one closing direction (24), wherein the pivoting sash (12) is pivotable in the closing direction (24) from the open position (18) to the closed position (20); and a control device (46), wherein the control device (46) is configured in the first operating mode to: control the drive device (26) such that it applies an opening torque to the pivoting sash (12) in the opening direction (22), determine, based on the sensor information, whether a position of the pivoting sash (12) in the closing direction (24) deviates from the open position (18), increase the opening torque if the position of the pivoting sash (12) in the closing direction (24) deviates from the open position (18), and switch from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold value,and wherein the control device (46) is configured to control the drive device (26) in the second operating mode such that the rotary sash (12) is released for a closing movement in the closing direction (24). Furthermore, the present invention relates to a method (50) for operating a rotary sash drive system (10, 10').

Description

[0001] The present invention relates to a pivot drive system for a pivot leaf of a door or window, in particular a fire door or fire window. Furthermore, the present invention relates to a method for operating a pivot drive system for a pivot leaf of a door or window, in particular a fire door or fire window.

[0002] Swing-leaf drive systems for swing leaves of doors or windows are generally known in the prior art.

[0003] A casement window is typically pivotable in a direction between an open position, where the door or window is open, and a closed position, where the door or window is closed. The open and closed positions can, in particular, be two end positions of the casement window in the direction of rotation. Pivoting the casement window towards the open position is called opening, and pivoting the casement window towards the closed position is called closing. Casement window operators are typically used to automatically move the connected casement window in the direction of rotation, for example, to open and / or close it.

[0004] Furthermore, it is known that swing door operators can be operated in different modes. For fire-resistant closures such as fire doors, fire-resistant windows, and the like, these can be, for example, active and passive operation. Active operation represents the normal operation, in which the swing door is held open by the operator, particularly by a motor. For this purpose, the operator can, for example, apply torque to the swing door in the opening direction to move it into the open position and hold it there. Active operation can therefore also be referred to as automatic operation or hold-open mode. Passive operation represents a special operation in which the swing door is released in the closing direction and can be closed, particularly with spring assistance.Passive operation serves primarily to ensure that the door or window can be closed in the event of a fire. Passive operation can therefore also be referred to as fire protection mode.

[0005] In the prior art, fire doors and windows have typically used a manual release element (e.g., a push button) or a fire detection element (e.g., a fire alarm and / or a smoke detector and / or a temperature sensor) to switch between the two operating modes. In the event of a fire alarm (e.g., triggered by the fire detection element), a manual release (e.g., by user activation of the manual release element), and / or a power supply failure of the swing door / window drive, the drive was switched from active to passive operation so that the swing door could be moved into the closed position to close the fire door or window.

[0006] Furthermore, it is also known in the prior art to use a manual movement of the rotating sash as a switching criterion for changing between two operating modes. For example, German patent application DE 10 2009 004 503 B4 describes how a change can occur when the rotating sash is manually moved from its fixed position and has swept over a predetermined minimum travel distance. In particular, the fact that the rotating sash has swung over this minimum travel distance is interpreted as user operation.

[0007] However, by using the swivel range as a switching criterion, it can be difficult to distinguish between user operation and other external forces acting on the rotating vane, such as a gust of wind or an accidental, brief force application.

[0008] The rotary vane drive systems known in the prior art therefore still leave room for improvement, especially with regard to the reliability of recognizing a user action to switch between different operating modes.

[0009] Against this background, it is an object of the present invention to provide an improved rotary wing drive system for a rotary wing and an improved method for operating a rotary wing drive system for a rotary wing, which is improved in particular with regard to the reliability of detecting a user operation.

[0010] According to a first aspect, a pivot drive system is provided for a pivot leaf of a door or window, in particular a fire door or fire window, wherein the pivot leaf is pivotable between an open position and a closed position, wherein the pivot drive system is operable in at least a first operating mode and a second operating mode, and wherein the pivot drive system comprises: a drive device configured to apply a torque to the pivoting sash at least in one opening direction, wherein the pivoting sash is pivotable from the closed position to the open position in the opening direction; a sensor device configured to acquire sensor information representative of a position and / or a change in position of the pivoting sash at least in one closing direction, wherein the pivoting sash is pivotable from the open position to the closed position in the closing direction; and a control device, the control unit is configured to operate in the first operating mode: to control the drive unit in such a way that it holds the sash in the open position by applying an opening torque to the sash in the opening direction, to determine, based on sensor information, whether the position of the sash in the closing direction deviates from the open position, to increase the opening torque if the position of the sash in the closing direction deviates from the open position, and to switch from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold value, and wherein the control device is configured to control the drive device in the second operating mode in such a way that the rotating wing is released for a closing movement in the closing direction and / or that the drive device does not apply any torque to the rotating wing in the opening direction.

[0011] According to a second aspect, a method for operating a pivoting sash drive system for a pivoting sash of a door or window, in particular a fire door or fire window, is provided, wherein the pivoting sash is pivotable between an open position and a closed position, wherein the pivoting sash drive system is operable in at least a first operating mode and a second operating mode, wherein the method in the first operating mode comprises the following steps: Holding the sash in the open position by applying an opening torque to the sash in one opening direction by means of a drive unit of the sash drive system, wherein the sash is pivotable in the opening direction from the closed position to the open position; acquiring sensor information by means of a sensor unit of the sash drive system, wherein the sensor information is representative of a position and / or a change in position of the sash at least in one closing direction, wherein the sash is pivotable in the closing direction from the open position to the closed position; determining, based on the sensor information, whether a position of the sash in the closing direction deviates from the open position; increasing the opening torque if the position of the sash in the closing direction deviates from the open position;and switching from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold value, and ; wherein the procedure in the second operating mode comprises the following step: Releasing the pivot wing for a closing movement in the closing direction, in particular wherein the drive device in the second operating mode does not apply any torque to the pivot wing in the opening direction.

[0012] The procedure according to the second aspect can be carried out, in particular, by means of the rotary vane drive system according to the first aspect. Specifically, the control unit of the rotary vane drive system can perform the steps of determining, increasing, and changing. Furthermore, in the initial actuation step, the control unit can control the drive unit in the first operating mode such that the drive unit acts the rotary vane with the opening torque in the opening direction.

[0013] The pivot drive system serves as a drive system for the pivot leaf of a door or window. The pivot drive system can include the pivot leaf itself. In particular, the pivot drive system can include the door or window. The door or window can be, in particular, a fire-resistant door or window. The door or window can be single-leaf or double-leaf. The door or window can therefore have one or more pivot leaves. The pivot drive system can serve as the drive system for at least one of the pivot leaves.

[0014] The casement sash can pivot between the open and closed positions. The door or window may have hinges for supporting the casement sash. In particular, the door or window may also have a frame. The casement sash can then be pivotally mounted via the hinges, especially on the frame. The opening direction refers to the direction in which the casement sash pivots from the closed position to the open position. The closing direction refers to the direction in which the casement sash pivots from the open position to the closed position. The open position and the closed position can, in particular, be two end positions of the casement sash.

[0015] The drive unit of the rotary sash drive system serves to apply a torque to the rotary sash, at least in the opening direction. To achieve this, the drive unit generates a torque that acts on the rotary sash. This torque causes the rotary sash to be pushed in the direction in which the torque acts. A torque in the opening direction thus exerts a force on the rotary sash in the opening direction.

[0016] To generate torque, the drive unit can have one or more components. In particular, several components of the drive unit can generate different torques, which can also act in different directions. The torque that the drive unit applies to the rotary vane is then to be understood as the total or cumulative torque of the components, i.e., the torque that effectively acts on the rotary vane by means of the drive unit. The drive unit can have a drive shaft that is coupled to the rotary vane's motion. In particular, the drive unit can drive the drive shaft in order to transmit the torque to the rotary vane.

[0017] The sensor device of the swing door drive system serves to acquire sensor information that is representative of a position and / or a change in position of the swing door, at least in the closing direction. The sensor information can, in particular, be representative of a position and / or a change in position of the swing door in the closing and / or opening direction. The sensor information can, for example, be position information, velocity information, and / or acceleration information. In particular, the sensor information can be information regarding a position, velocity, and / or acceleration of the swing door or a component motion-coupled with the swing door. The sensor device can generate a sensor signal containing the sensor information and transmit it to the control unit. The sensor signal can be transmitted repeatedly or continuously.Alternatively, the sensor signal can also be transmitted only when the position changes.

[0018] The control unit of the rotary vane drive system serves to control the drive unit. For this purpose, the control unit can, for example, generate a control signal and transmit it to the drive unit. In particular, the control unit can be connected to the drive unit via communication, for example, wirelessly or via a wired connection. The control signal can contain control information to regulate the torque with which the drive unit is to actuate the rotary vane.

[0019] The control unit can also receive and evaluate sensor information from the sensor device. For example, the control unit can receive the sensor signal from the sensor device. In particular, the control unit can be connected to the sensor device via communication, such as a wireless or wired connection. The control unit can use the sensor information to control the drive device. The control unit can also be referred to as a control and evaluation unit.

[0020] The rotary vane drive system is operable in at least the first and second operating modes. In particular, the control unit is configured to operate, and especially to control, the drive unit in both the first and second operating modes.

[0021] The first operating mode is used to hold the sash in the open position. Specifically, the sash is moved into the open position in the opening direction and then held there. The first operating mode can therefore also be called the hold-open mode.

[0022] To hold the sash in the open position, the drive unit, in the first operating mode, applies the opening torque to the sash in the opening direction. Specifically, the control unit regulates the drive unit such that the drive unit applies the opening torque to the sash in the opening direction. This opening torque can also be referred to as the holding torque. The control unit thus regulates the drive unit so that the drive unit pushes the sash in the opening direction and holds it in the open position.

[0023] Furthermore, in the first operating mode, the control unit determines, based on sensor information from the sensor device, whether the position of the sash deviates from the open position in the closing direction. In other words, the control unit determines whether the sash is in the open position or not. If the position of the sash deviates from the open position in the closing direction (i.e., if the sash is not in the open position), the control unit increases the opening torque, in particular by appropriately controlling the drive unit.

[0024] In particular, the control unit can, for example, initially set a small opening torque at the beginning of the first operating mode. Specifically, a minimum opening torque can be set that is less than the torque threshold. If a deviation of the sash from the open position is then detected, the opening torque is increased. This is intended to force the sash back into the open position. This can also be described as position control.

[0025] For example, a deviation of the swing door from the open position in the closing direction can be caused by an external force acting on the swing door, e.g., by a user pushing or pulling the swing door in the closing direction. In particular, the cause of the external force is therefore not in the swing door drive system itself.

[0026] If the position of the sash in the closing direction does not deviate from the open position, the opening torque is not increased. In particular, the opening torque can be reduced again if the position of the sash in the closing direction does not (or no longer) deviate from the open position and the opening torque was previously increased. Specifically, the opening torque can be reduced to the minimum opening torque.

[0027] The second operating mode is used to release the movement of the sash, particularly from the open position, in the closing direction, so that the sash can be moved in the closing direction, especially to close the door or window in the event of a fire. The second operating mode can therefore also be referred to as the fire protection mode.

[0028] In the second operating mode, the drive unit does not apply any torque to the sash in the opening direction, so the sash is released in the closing direction. Specifically, the control unit controls the drive unit in such a way that it does not apply any torque to the sash in the opening direction. In particular, the control unit controls the drive unit in such a way that it does not push the sash in the opening direction and thus releases it in the closing direction, especially from the open position. In other words, in the second operating mode, the control unit controls the drive unit in such a way that the sash is released for a closing movement in the closing direction.

[0029] According to the invention, it is proposed to switch from the first operating mode to the second operating mode based on a comparison of the opening torque with the torque threshold. Specifically, the control unit switches from the first operating mode to the second operating mode based on this comparison. In particular, this comparison is intended to detect a user action or request, triggering the switch from the first to the second operating mode. The comparison between the opening torque and the torque threshold thus serves as the switching criterion. For example, the switch can occur when the opening torque is increased to such an extent that it reaches or exceeds the torque threshold. However, there can also be further, additional criteria, which, for example, could be time-dependent.Before the change, the control unit therefore controls the drive unit in the first operating mode and after the change in the second operating mode.

[0030] This changeover switches the swing door drive system from its first to its second operating mode. Initially, the swing door drive system operates in the first mode. This first mode can be the normal operation of the swing door drive system, in which the swing door is held open. If the control unit determines, based on a comparison of the opening torque with the torque threshold, that a changeover is necessary, it switches to the second operating mode. The swing door drive system then operates in the second mode. This second mode can be the special operation of the swing door drive system, in which the swing door can be closed, particularly in the event of a fire.

[0031] The new swing door drive system and the new procedure thus incorporate a torque comparison to determine whether the operating mode should be changed. Specifically, due to the torque control and the comparison with the torque threshold, an external force acting on the swing door must be sustained and sufficiently large to trigger a change, i.e., to be interpreted as user operation. In particular, brief forces acting on the door (e.g., gusts of wind) are generally insufficient to be interpreted as user operation and thus trigger a change. Therefore, the new swing door drive system and the new procedure improve the reliability of user operation detection.

[0032] The task posed at the beginning is thus fully solved.

[0033] In a first embodiment of the aspects, the control device can be configured to switch from the first operating state to the second operating state when the opening torque is greater than or equal to the torque threshold.

[0034] In this way, user interaction can be easily and reliably recorded, allowing a switch from the first to the second operating state.

[0035] In a further embodiment of the aspects or one of their embodiments, the control device may be configured to switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold value and the position of the rotary wing in the closing direction deviates from the open position for a first predetermined period of time.

[0036] In other words, the system can switch from the first operating state to the second operating state if the duration during which the position of the rotating sash deviates from the open position in the closing direction is greater than or equal to a first predetermined duration, and the opening torque is greater than or equal to the torque threshold. The first predetermined duration can be, for example, 1 s to 5 s, particularly 3 s. This further improves the reliability of user operation detection.

[0037] In a further embodiment of the aspects or one of their embodiments, the control device may be configured to switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold for a second predetermined period of time.

[0038] In other words, the system can switch from the first operating state to the second operating state if the duration during which the opening torque is greater than or equal to the torque threshold is greater than or equal to a second predetermined duration. This second predetermined duration can be, for example, 0.5 s to 3 s, and in particular 1 s. This further improves the reliability of user actuation detection.

[0039] In a further embodiment of the aspects or one of their embodiments, the control device may be configured to continuously increase the opening torque in the first operating mode, in particular stepwise or continuously, as long as the position of the rotary wing in the closing direction deviates from the open position.

[0040] The opening torque is initially lower than the torque threshold. As long as the position of the rotating sash deviates from the open position in the closing direction, the control unit continuously increases the opening torque. This allows the opening torque to reach or exceed the torque threshold after a certain period of time.

[0041] In a further embodiment of the aspects or one of their embodiments, the control device can be configured to control the drive device in the second operating mode in such a way that it applies a closing torque to the rotary wing in the closing direction.

[0042] In particular, the control unit regulates the drive unit in the second operating mode such that the drive unit pushes the sash in the closing direction and thus into the closed position. In this way, the door or window can be closed with assistance from the drive unit in the second operating mode, especially in the event of a fire.

[0043] In a further embodiment of the aspects or one of their embodiments, the drive device may have a motor, wherein the motor is configured to apply at least a torque in the opening direction to the rotary wing, wherein the control device controls the motor in the first operating mode such that the rotary wing is subjected to the opening torque in the opening direction.

[0044] The motor serves to apply a torque to the rotating sash, at least in the opening direction. In particular, the motor can be variable to adjust the torque. For example, the motor can be regulated up to a maximum torque. The maximum torque is preferably greater than or equal to the torque threshold. The motor can also be controlled so that it does not apply any torque, for example, by switching it off. To control the motor, the control unit can transmit the control signal to the motor. The motor can have a motor controller that receives the control signal and then regulates the motor (in particular, the power supply to the motor) accordingly to adjust the torque applied to the rotating sash. Alternatively, the control signal can also be a current with which the motor is directly operated. The current intensity then regulates the motor.The motor can also drive the drive shaft of the drive unit, with the drive unit transmitting the torque from the motor to the rotary vane.

[0045] In the first operating mode, the control unit controls the motor such that the sash is subjected to the opening torque in the opening direction. In the second operating mode, the control unit controls the motor such that the sash is not subjected to any torque in the opening direction. Preferably, the control unit switches off the motor in the second operating mode. Alternatively, the control unit can also control the motor in the second operating mode such that the drive unit applies the closing torque to the sash in the closing direction.

[0046] In a further embodiment of the aspects or one of their embodiments, the drive device may have a mechanical energy storage device, wherein the mechanical energy storage device is configured to apply a torque to the rotary wing in the closing direction.

[0047] In particular, in the second operating mode, the mechanical energy storage device can apply the closing torque to the sash in the closing direction. The mechanical energy storage device serves to apply a closing torque to the sash. Specifically, the mechanical energy storage device can charge when the sash is moved in the opening direction and discharge when the sash is moved in the closing direction. The mechanical energy storage device can, for example, include a spring element or an elastic element that is pre-tensioned in the open position of the sash such that it pushes the sash in the closing direction. To transmit the torque, the mechanical energy storage device is motion-coupled with the sash. For example, the mechanical energy storage device can be motion-coupled with the sash at least via the drive shaft.In particular, the mechanical energy storage device can apply a torque to the drive shaft, which is then transmitted to the rotary vane. In the first operating mode, the mechanical energy storage device can also generate a torque in the closing direction, whereby the motor then generates a correspondingly larger torque in the opening direction to apply the opening torque to the rotary vane. Specifically, the opening torque then corresponds to the sum of the motor's torque and the mechanical energy storage device's torque, with the motor's opening torque being greater than the mechanical energy storage device's closing torque.

[0048] In a further embodiment of the aspects or one of their embodiments, the rotary sash drive system can have a motion transmission device, wherein the motion transmission device is configured to transmit the torque, in particular the opening torque and / or the closing torque, from the drive device to the rotary sash.

[0049] The motion transmission device serves to transmit a movement or torque from the drive unit to the rotating sash. In this way, a torque, in particular the opening torque or the closing torque, can be easily transmitted from the drive unit to the rotating sash.

[0050] In a further embodiment of the aspects or one of their embodiments, the motor and / or the mechanical energy storage device can be motionally coupled to the rotary vane via the motion transmission device.

[0051] The motion transmission device serves, in particular, to transmit torque from the motor and / or torque from the mechanical energy storage device to the rotary vane. The motion transmission device can be coupled to the rotary vane on the one hand and to the motor and / or the mechanical energy storage device on the other. Specifically, the motor and / or the mechanical energy storage device can be coupled to the motion transmission device via the drive shaft.

[0052] In a further embodiment of the aspects or one of their embodiments, the motion transmission device can have a slide rail, a sliding block which is movable in the slide rail, and a swivel arm which is coupled to the sliding block.

[0053] The sliding block is movable within the slide rail. In particular, the slide rail can extend in a sliding direction, with the sliding block being movably mounted within the slide rail along the sliding direction. The pivot arm is coupled to the sliding block. In particular, the pivot arm can have a first end and a second, opposite end. The second end of the pivot arm can then be coupled to the drive shaft, in particular in a rotationally fixed manner. The first end of the pivot arm can be coupled to the sliding block. For example, the sliding block can be rotatably mounted at the first end. Alternatively, the first end of the pivot arm can also form the sliding block itself.

[0054] The guide rail can be arranged on the sash side, i.e., on the sash itself, or on the frame side, i.e., on the frame of the door or window. In particular, the guide rail can be attached to or mounted on either the sash or the frame. When the guide rail is arranged on the sash side, the drive unit, especially the motor and / or the mechanical energy storage device, is preferably arranged on the frame side. When the guide rail is arranged on the frame side, the drive unit, especially the motor and / or the mechanical energy storage device, is preferably arranged on the sash side.

[0055] In an alternative embodiment of the aspects or one of their embodiments, the motion transmission device may include a linkage. The linkage may serve to transmit a movement or torque from the drive device to the rotary vane.

[0056] In a further embodiment of the aspects or one of their embodiments, the sensor device may have at least one sensor which is configured to detect a position, a speed and / or an acceleration of the rotary vane or of a component coupled to the rotary vane in motion, in particular the sliding block or the swivel arm.

[0057] In other words, the sensor serves to detect at least one parameter from a list comprising the position, velocity, and acceleration of the rotary vane or a component motion-coupled to the rotary vane. Specifically, the sensor can detect the position, velocity, and / or acceleration repeatedly or continuously. The sensor can be a position sensor, a velocity sensor, or an acceleration sensor. For example, the sensor can detect the position, velocity, and / or acceleration of the rotary vane, the sliding block, the pivot arm, and / or the drive shaft. The sensor information can thus include the position, velocity, and / or acceleration of the rotary vane, the sliding block, the pivot arm, and / or the drive shaft.The sensor device can also have several, in particular different, sensors, with each sensor serving to capture corresponding sensor information.

[0058] In a further embodiment of the second aspect or one of its embodiments, the change from the first operating state to the second operating state can occur if the opening torque is greater than or equal to the torque threshold.

[0059] As previously explained, this method allows for the simple and reliable detection of user interaction and thus the switching from the first to the second operating state.

[0060] In a further embodiment of the second aspect or one of its embodiments, the change from the first operating state to the second operating state can occur if the opening torque is greater than or equal to the torque threshold and the position of the rotary wing in the closing direction deviates from the open position for a first predetermined period of time.

[0061] As previously explained, this further improves the reliability of recording user activity.

[0062] In a further embodiment of the second aspect or one of its embodiments, the change from the first operating state to the second operating state can occur if the opening torque is greater than or equal to the torque threshold for a second predetermined period of time.

[0063] As previously explained, this further improves the reliability of recording user activity.

[0064] In a further embodiment of the second aspect or one of its embodiments, the opening torque can be continuously increased in the step of increasing, in particular stepwise or continuously, as long as the position of the rotating wing in the closing direction deviates from the open position.

[0065] The opening torque is initially lower than the torque threshold. As long as the position of the rotating sash deviates from the open position in the closing direction, the control unit continuously increases the opening torque. This allows the opening torque to reach or exceed the torque threshold after a certain period of time.

[0066] In a further embodiment of the second aspect or one of its embodiments, the drive device, in particular in the release step, can apply a closing torque in the closing direction to the rotary wing in the second operating mode.

[0067] In particular, the control unit can control the drive unit in the second operating mode such that the drive unit applies the closing torque to the sash in the closing direction. In this way, the door or window can be assisted in closing by the drive unit in the second operating mode, especially in the event of a fire.

[0068] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0069] Embodiments of the invention are illustrated in the drawing and explained in more detail in the following description. The drawing shows: Fig. 1 a schematic view of a first embodiment of a rotary vane drive system; Fig. 2 a view of a rotary vane of the rotary vane drive system made of Fig. 1 in an open position and a closed position; Fig. 3 a schematic view of a first embodiment of a rotary vane drive system; and Fig. 4 a schematic view of an embodiment of a method.

[0070] The Figure 1 and 2 Figure 10 shows a first embodiment of a swing-leaf drive system, designated in its entirety by the reference numeral 10. The swing-leaf drive system 10 serves to drive a swing leaf 12 of a door or window 14. Fig. 1A door 14 is shown as an example. The door or window 14 can, in particular, be a fire door or a fire-resistant window. The door or window 14 can also have a frame 15. The door or window 14 can have hinges 16 for supporting the sash 12. The sash drive system 10 can operate the door or window 14 with the sash 12.

[0071] The hinged sash 12 is pivotable between the open position 18 and the closed position 20. In particular, the hinged sash 12 can be pivotally mounted via the hinges 16, especially on the frame 15. The hinged sash 12 is pivotable in an opening direction 22 from the closed position 20 to the open position 18. The hinged sash 12 is pivotable in a closing direction 24 from the open position 18 to the closed position 20.

[0072] The rotary window drive system 10 comprises a drive unit 26. The drive unit 26 is configured to apply a torque to the rotary window 12, at least in the opening direction 22. The drive unit 26 comprises a motor 28. The motor 28 is configured to apply a torque to the rotary window 12, at least in the opening direction 22. The drive unit 26 comprises a mechanical energy storage device 30. The mechanical energy storage device 30 is configured to apply a torque to the rotary window 12 in the closing direction 24. For this purpose, the mechanical energy storage device can, for example, comprise a spring element or an elastic element. The motor 28 and the mechanical energy storage device 30 can be arranged in a housing 48. The drive unit 26 comprises a drive shaft 32.The motor 28 and the mechanical energy storage device 30 are motionally coupled to the rotary vane 12 via the drive shaft 32. In particular, the motor 28 and the mechanical energy storage device 30 can drive the drive shaft 32. In this way, torque can be transmitted from the motor 28 and / or the mechanical energy storage device 30 to the rotary vane 12.

[0073] The rotary vane drive system 10 includes a motion transmission device 34. The motion transmission device 34 is configured to transmit torque from the drive unit 26 to the rotary vane 12. In particular, the motion transmission device 34 serves to transmit torque from the motor 28 and / or torque from the mechanical energy storage device 30 to the rotary vane 12. For this purpose, the motion transmission device is coupled to the rotary vane 12 on one side and to the drive shaft 32 on the other.

[0074] The motion transmission device 34 comprises a slide rail 36, a sliding block 38, and a pivot arm 40. The sliding block 38 is movable within the slide rail 36. The pivot arm 40 is coupled to the sliding block 38. The pivot arm 40 has a first end and a second, opposite end. The first end of the pivot arm 40 is coupled to the sliding block 38, in particular rotatably mounted thereon. The second end of the pivot arm 40 is coupled to the drive shaft 32, in particular non-rotatably connected to it. In an alternative embodiment, the motion transmission device 34 can also include a linkage to transmit the torque from the drive unit 26 to the rotary vane 12.

[0075] In the swing-wing drive system 10, the guide rail 36 is arranged on the swing-wing side, i.e., on the swing-wing 12. Specifically, the guide rail 36 is attached to or mounted on the swing-wing 12. The drive unit 26, and in particular the motor 28 and the mechanical energy storage device 30, are arranged on the frame side, i.e., on the frame 15. Specifically, the housing 48 can be arranged on the frame 15.

[0076] The rotary door drive system 10 includes a sensor device 42. The sensor device 42 is configured to acquire sensor information that is representative of a position and / or a change in position of the rotary door in the closing direction 24. For this purpose, the sensor device 42 includes at least one sensor 44. The sensor device 42 may also include multiple sensors 44. The at least one sensor 44 is configured to acquire a position, a velocity, and / or an acceleration of the rotary door 12 or of a component motion-coupled with the rotary door. For example, the sensor 44 may acquire a position, a velocity, and / or an acceleration of the rotary door 12, the sliding block 38, the pivot arm 40, and / or the drive shaft 32. The sensor device 42, in particular the sensor 44, may be arranged in the housing 48, on the frame 15, in the guide rail 36, and / or on the rotary door 12.

[0077] The rotary vane drive system 10 includes a control unit 46. The control unit 46 is configured to control the drive unit 26. In particular, the control unit 46 can generate a control signal and transmit it to the drive unit 26. For this purpose, the control unit 46 is communicatively connected to the drive unit 26. The control unit 46 is also communicatively connected to the sensor unit 42. In particular, the sensor unit 42 can transmit a sensor signal to the control unit 46, wherein the sensor signal contains the sensor information.

[0078] The control unit 46 can, for example, have various subunits, each of which controls a component and / or processes data. For example, the control unit 46 can have a control unit that controls the drive unit 26. In particular, the control unit can generate the control signal and transmit it to the drive unit 26. Furthermore, the control unit 26 can have a data processing unit configured to evaluate the sensor information. In particular, the data processing unit can receive the sensor signal and evaluate the sensor information it contains.

[0079] The control device 46 can be connected to or include a non-volatile data storage device in which a computer program is stored. In some embodiments, the control device 46 is a general-purpose computer, such as a commercially available personal computer running Windows®, Linux, or MacOS, and the computer program from the memory includes program code designed and configured to implement embodiments of the new method, in particular control and determination steps, in combination with the sensor device 42 and the drive device 26.In an alternative embodiment, the control device 46 is a logic circuit, such as a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a microcontroller, or any other suitable programmable electrical circuit. The embodiments of the new method, in particular control and determination steps, can be implemented in the logic circuit, such that the logic circuit is designed and configured to implement embodiments of the new method in combination with the sensor device 42 and the drive device 26. Any suitable programming language or hardware description language, such as C, VHDL, and the like, can be used to implement embodiments of the new method in the logic circuit.

[0080] The rotary door drive system 10 can be operated in at least a first operating mode and a second operating mode. In particular, the control unit 46 is configured to operate, and especially to control, the drive unit 26 in the first and second operating modes. The control unit 46 can be arranged in the housing 48. Alternatively, the control unit 46 can be arranged outside the housing 48, for example on the frame 15 or at a location spaced apart from the door or window 14.

[0081] The control device 46 is configured to control the drive device 26 in the first operating mode such that it applies an opening torque to the rotary sash 12 in the opening direction 22. In particular, the control device 46 can control the motor 28 in the first operating mode such that the rotary sash 12 is subjected to the opening torque in the opening direction 22.

[0082] Furthermore, the control unit 46 is designed to determine, in the first operating mode, based on the sensor information, whether a position of the rotary wing 12 in the closing direction 24 deviates from the open position 18.

[0083] Furthermore, the control device 46 is configured to increase the opening torque in the first operating mode if the position of the pivot wing 12 in the closing direction 24 deviates from the open position 18. In particular, the control device 46 can be configured to continuously increase the opening torque in the first operating mode, especially stepwise or continuously, as long as the position of the pivot wing 12 in the closing direction 24 deviates from the open position 18. The control device 46 can also be configured to reduce the opening torque in the first operating mode if the position of the pivot wing 12 in the closing direction 24 does not deviate from the open position 18 and the opening torque has previously been increased.

[0084] Furthermore, the control device 46 is configured to switch from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold. For example, the control device 46 can be configured to switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold. Alternatively, the control device 46 can be configured to switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold and the position of the rotating sash 12 in the closing direction 24 deviates from the open position 18 for a first predetermined period of time.Alternatively, the control device 46 can be configured to switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold for a second predetermined period of time.

[0085] Furthermore, the control unit 46 is configured to control the drive unit 26 in the second operating mode such that the swing door 12 is released for a closing movement in the closing direction 24 and / or that the drive unit 26 does not apply any torque to the swing door 12 in the opening direction 22. In particular, the control unit 46 can be configured to control the drive unit 26 in the second operating mode such that it applies a closing torque to the swing door 12 in the closing direction 24. For example, the control unit 46 can switch off the motor 28. Then the mechanical energy storage device 30 applies the closing torque to the swing door 12 in the closing direction 24.

[0086] Fig. 3Figure 1 shows a second embodiment of a rotary sash drive system, designated in its entirety by reference numeral 10'. The rotary sash drive system 10' according to the second embodiment corresponds essentially to the rotary sash drive system 10 of the first embodiment. Identical elements are marked with the same reference numerals and are not explained further below. The rotary sash drive system 10' according to the second embodiment differs from the rotary sash drive system 10 of the first embodiment essentially in the arrangement of the guide rail 36 and the drive unit 26.

[0087] In the swing door drive system 10', the guide rail 36 is arranged on the frame side, i.e., on the frame 15. Specifically, the guide rail 36 is attached to or mounted on the frame 15. The drive unit 26, and in particular the motor 28 and the mechanical energy storage device 30, are arranged on the swing door side, i.e., on the swing door 12. Specifically, the housing 48 can be arranged on the swing door 12. Alternatively, if the motion transmission device 34 has a linkage, the linkage can be arranged on the frame side.

[0088] Fig. 4Figure 50 shows an embodiment of a method, in its entirety designated by reference numeral 50. Method 50 serves to operate a swing-leaf drive system 10, 10' for a swing-leaf 12 of a door or window 14, in particular a fire door or fire-resistant window, wherein the swing-leaf 12 is pivotable between an open position 18 and a closed position 20, and wherein the swing-leaf drive system 10, 10' is operable in at least a first operating mode and a second operating mode. The swing-leaf drive system operated by means of Method 50 is, in particular, configured according to the swing-leaf drive system 10, 10' of the first or second embodiment. In particular, the swing-leaf drive system 10, 10' of the first or second embodiment can be operated by means of Method 50.

[0089] In a first step 52 of the method 50, in the first operating mode, the rotary sash 12 is subjected to an opening torque in the opening direction 22 by means of the drive unit 26 of the rotary sash drive system 10, 10', wherein the rotary sash 12 can pivot in the opening direction 22 from the closed position 20 to the open position 18. In particular, the control unit 46 can control the drive unit 26 in the first operating mode such that the drive unit 26 subjects the rotary sash 12 to the opening torque in the opening direction 22.

[0090] In a further step 54 of the method 50, in the first operating mode, sensor information is acquired by means of the sensor device 42 of the rotary wing drive system 10, 10', wherein the sensor information is representative of a position and / or a change in position of the rotary wing 12 in the closing direction 24, wherein the rotary wing 12 can be pivoted from the open position 18 to the closed position 20 in the closing direction 24.

[0091] In a further step 56 of the procedure 50, in the first operating mode, it is determined, based on the sensor information, whether a position of the rotary wing 12 in the closing direction 24 deviates from the open position 18. In particular, step 56 can be carried out by means of the control device 46.

[0092] In a further step 58 of the method 50, the opening torque is increased in the first operating mode if the position of the rotary wing 12 in the closing direction 24 deviates from the open position 18. Preferably, in step 58, the opening torque can be increased continuously, in particular stepwise or continuously, as long as the position of the rotary wing 12 in the closing direction 24 deviates from the open position 18. In particular, step 58 can be carried out by means of the control device 46.

[0093] In a further step 60 of the procedure 50, the first operating mode is switched to the second operating mode based on a comparison of the opening torque with a torque threshold value. In particular, step 60 can be carried out by means of the control device 46.

[0094] Preferably, in step 60, the system can switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold. Alternatively, in step 60, the system can switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold and the position of the rotary sash 12 in the closing direction 24 deviates from the open position 18 for a first predetermined period. Alternatively, in step 60, the system can switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold for a second predetermined period.

[0095] In the second operating mode, the drive unit 26 does not apply any torque to the rotating wing 12 in the opening direction 22. In particular, the control unit 46 can control the drive unit 26 in the second operating mode such that the drive unit 26 does not apply any torque to the rotating wing 12 in the opening direction 22.

[0096] In a further step 62 of the procedure 50, in the second operating mode, the rotating wing 12 is released for a closing movement in the closing direction 24. In particular, the control device 46 can control the drive device 26 in the second operating mode such that the rotating wing 12 is released for the closing movement in the closing direction.

[0097] Preferably, the drive unit 26, particularly in step 62, can apply a closing torque in the closing direction 24 to the rotary wing 12 in the second operating mode. In particular, the control unit 46 can control the drive unit 26 in the second operating mode such that the drive unit 26 applies the closing torque in the closing direction 24 to the rotary wing 12.

[0098] Furthermore, the present disclosure includes the following clauses: Clause 1. A pivot drive system (10, 10') for a pivot sash (12) of a door or window (14), in particular a fire door or fire window, wherein the pivot sash (12) is pivotable between an open position (18) and a closed position (20), wherein the pivot drive system (10, 10') is operable in at least a first operating mode and a second operating mode, wherein the pivot drive system (10, 10') comprises: a drive device (26) configured to apply a torque to the pivot sash (12) at least in one opening direction (22), wherein the pivot sash (12) is pivotable in the opening direction (22) from the closed position (20) to the open position (18); a sensor device (42) which is configured to acquire sensor information that is representative of a position and / or a change in position of the rotating leaf (12) at least in one closing direction (24),wherein the pivoting sash (12) is pivotable in the closing direction (24) from the open position (18) to the closed position (20); and a control device (46), wherein the control device (46) is configured in the first operating mode: to control the drive device (26) such that it holds the pivoting sash (12) in the open position (18) by applying an opening torque in the opening direction (22) to the pivoting sash (12), to determine, based on sensor information, whether a position of the pivoting sash (12) in the closing direction (24) deviates from the open position (18), to increase the opening torque if the position of the pivoting sash (12) in the closing direction (24) deviates from the open position (18), and to switch from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold value, and wherein the control device (46) is configured toto control the drive unit (26) in the second operating mode such that the swing sash (12) is released for a closing movement in the closing direction (24). Clause 2. Swing sash drive system (10, 10') according to Clause 1, wherein the control unit (46) is configured to switch from the first operating state to the second operating state when the opening torque is greater than or equal to the torque threshold value. Clause 3. Swing sash drive system (10, 10') according to Clause 1, wherein the control unit (46) is configured to switch from the first operating state to the second operating state when the opening torque is greater than or equal to the torque threshold value and the position of the swing sash (12) in the closing direction (24) deviates from the open position (18) for a first predetermined period of time. Clause 4. Swing sash drive system (10, 10') according to Clause 1, wherein the control unit (46) is configured toto switch from the first operating state to the second operating state if the opening torque is greater than or equal to the torque threshold for a second predetermined period. Clause 5. Swing door drive system (10, 10') according to any one of Clauses 1 to 4, wherein the control device (46) is configured to continuously, in particular stepwise or continuously, increase the opening torque in the first operating mode as long as the position of the swing door (12) in the closing direction (24) deviates from the open position (18). Clause 6. Swing door drive system (10, 10') according to any one of Clauses 1 to 5, wherein the control device (46) is configured to control the drive device (26) in the second operating mode such that it applies a closing torque to the swing door (12) in the closing direction (24). Clause 7. Swing door drive system (10, 10') according to any one of Clauses 1 to 6,wherein the drive device (26) comprises a motor (28), wherein the motor (28) is configured to apply a torque to the rotary sash (12) at least in the opening direction (22), and wherein the control device (46) controls the motor (28) in the first operating mode such that the rotary sash (12) is subjected to the opening torque in the opening direction (22). Clause 8. Rotary sash drive system (10, 10') according to any one of Clauses 1 to 7, wherein the drive device (26) comprises a mechanical energy storage device (30), wherein the mechanical energy storage device (30) is configured to apply a torque to the rotary sash (12) in the closing direction (24). Clause 9. Rotary vane drive system (10, 10') according to any one of Clauses 1 to 8, wherein the rotary vane drive system (10, 10') comprises a motion transmission device (34), wherein the motion transmission device (34) is configured to transmit the torque,in particular the opening torque and / or the closing torque, to be transmitted from the drive unit (26) to the pivoting sash (12). Clause 10. Pivoting sash drive system (10, 10') according to Clause 9, wherein the motor (28) and / or the mechanical energy storage device (30) are motionally coupled to the pivoting sash (12) via the motion transmission device (34). Clause 11. Pivoting sash drive system (10, 10') according to Clause 9 or 10, wherein the motion transmission device (34) comprises a slide rail (36), a sliding block (38) which is movable in the slide rail (36), and a pivot arm (40) which is coupled to the sliding block (38). Clause 12. Rotary vane drive system (10, 10') according to any one of Clauses 1 to 11, wherein the sensor device (42) has at least one sensor (44) configured to detect a position, velocity and / or acceleration of the rotary vane (12) or of a component motion-coupled with the rotary vane,in particular the sliding block (36) or the pivot arm (40). Clause 13. Swing sash drive system (10, 10') according to one of Clauses 1 to 12, wherein the swing sash drive system (10, 10') comprises the swing sash (12). Clause 14. Swing sash drive system (10, 10') according to one of Clauses 1 to 13, wherein the swing sash drive system (10, 10') comprises the door or window (14). Clause 15. Method (50) for operating a pivot drive system (10, 10') for a pivot sash (12) of a door or window (14), in particular a fire door or fire window, wherein the pivot sash (12) is pivotable between an open position (18) and a closed position (20), wherein the pivot drive system (10, 10') is operable in at least a first operating mode and a second operating mode,wherein the method (50) in the first operating mode comprises the following steps: holding (52) the pivot sash (12) in the open position (18) by applying (52) to the pivot sash (12) an opening torque in an opening direction (22) by means of a drive unit (26) of the pivot sash drive system (10, 10'), wherein the pivot sash (12) is pivotable in the opening direction (22) from the closed position (20) to the open position (18); acquiring (54) sensor information by means of a sensor unit (42) of the pivot sash drive system (10, 10'), wherein the sensor information is representative of a position and / or a change in position of the pivot sash (12) at least in a closing direction (24), wherein the pivot sash (12) is pivotable in the closing direction (24) from the open position (18) to the closed position (20); determining (56) based on the sensor information,whether a position of the pivot sash (12) in the closing direction (24) deviates from the open position (18); increasing (58) the opening torque if the position of the pivot sash (12) in the closing direction (24) deviates from the open position (18); and switching (60) from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold, wherein the method (50) in the second operating mode comprises the following step: releasing (62) the pivot sash for a closing movement in the closing direction (24). Clause 16. Method (50) according to Clause 15, wherein in the step of switching from the first operating state to the second operating state, the procedure is switched if the opening torque is greater than or equal to the torque threshold. Clause 17. Method (50) according to Clause 15, wherein in the step of switching from the first operating state to the second operating state,Clause 18. Method (50) according to Clause 15, wherein in the step of changing from the first operating state to the second operating state, the method changes when the opening torque is greater than or equal to the torque threshold for a second predetermined period. Clause 19. Method (50) according to one of Clauses 15 to 18, wherein in the step of increasing, the opening torque is continuously, in particular stepwise or continuously, increased as long as the position of the rotating sash (12) in the closing direction (24) deviates from the open position (18). Clause 20. Method (50) according to one of Clauses 15 to 18, wherein the drive device (26), in particular in the step of releasing,In the second operating mode, the rotating wing (12) is subjected to a closing torque in the closing direction (24). Reference symbol list:

[0099] 10, 10'Swing drive system 12Swing 14Door or window 15Frame 16Hinges 18Open position 20Closed position 22Opening direction 24Closing direction 26Drive unit 28:Motor 30Mechanical energy storage 32Drive shaft 34Motion transmission unit 36Slide rail 38Sliding block 40Swivel arm 42Sensor unit 44Sensor 46Control unit 48Housing.

Claims

1. A pivot drive system (10, 10') for a pivot leaf (12) of a door or window (14), in particular a fire door or fire window, wherein the pivot leaf (12) is pivotable between an open position (18) and a closed position (20), wherein the pivot drive system (10, 10') is operable in at least a first operating mode and a second operating mode, wherein the pivot drive system (10, 10') comprises: - a drive device (26) configured to apply a torque to the pivot leaf (12) at least in one opening direction (22), wherein the pivot leaf (12) is pivotable in the opening direction (22) from the closed position (20) to the open position (18); - a sensor device (42) which is configured to acquire sensor information that is representative of a position and / or a change in position of the rotating leaf (12) at least in one closing direction (24),wherein the pivoting wing (12) can be pivoted in the closing direction (24) from the open position (18) to the closed position (20); and - a control device (46), wherein the control device (46) is configured in the first operating mode to: - control the drive device (26) such that it holds the rotary sash (12) in the open position (18) by applying an opening torque in the opening direction (22) to the rotary sash (12), - determine, based on the sensor information, whether a position of the rotary sash (12) in the closing direction (24) deviates from the open position (18), - increase the opening torque if the position of the rotary sash (12) in the closing direction (24) deviates from the open position (18), and - switch from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold value, and wherein the control device (46) is configured toto control the drive unit (26) in the second operating mode such that the rotating wing (12) is released for a closing movement in the closing direction (24).

2. Rotary vane drive system (10, 10') according to claim 1, wherein the control device (46) is configured to switch from the first operating state to the second operating state when the opening torque is greater than or equal to the torque threshold value.

3. Rotary wing drive system (10, 10') according to claim 1, wherein the control device (46) is configured to switch from the first operating state to the second operating state when the opening torque is greater than or equal to the torque threshold value and the position of the rotary wing (12) in the closing direction (24) deviates from the open position (18) for a first predetermined period of time.

4. Rotary vane drive system (10, 10') according to claim 1, wherein the control device (46) is configured to switch from the first operating state to the second operating state when the opening torque is greater than or equal to the torque threshold value for a second predetermined period of time.

5. Rotary door drive system (10, 10') according to one of claims 1 to 4, wherein the control device (46) is configured to continuously, in particular stepwise or continuously, increase the opening torque in the first operating mode as long as the position of the rotary door (12) in the closing direction (24) deviates from the open position (18).

6. Rotary door drive system (10, 10') according to one of claims 1 to 5, wherein the control device (46) is configured to control the drive device (26) in the second operating mode such that it applies a closing torque to the rotary door (12) in the closing direction (24).

7. Rotary vane drive system (10, 10') according to one of claims 1 to 6, wherein the drive device (26) has a motor (28), wherein the motor (28) is configured to apply a torque to the rotary vane (12) at least in the opening direction (22), wherein the control device (46) controls the motor (28) in the first operating mode such that the rotary vane (12) is applied with the opening torque in the opening direction (22).

8. Rotary door drive system (10, 10') according to one of claims 1 to 7, wherein the drive device (26) has a mechanical energy storage device (30), wherein the mechanical energy storage device (30) is configured to apply a torque to the rotary door (12) in the closing direction (24).

9. Rotary wing drive system (10, 10') according to one of claims 1 to 8, wherein the rotary wing drive system (10, 10') has a motion transmission device (34), wherein the motion transmission device (34) is configured to transmit the torque, in particular the opening torque and / or the closing torque, from the drive device (26) to the rotary wing (12), in particular wherein the motor (28) and / or the mechanical energy storage device (30) are motionally coupled to the rotary wing (12) via the motion transmission device (34).

10. Rotary vane drive system (10, 10') according to one of claims 1 to 9, wherein the sensor device (42) has at least one sensor (44) which is configured to detect a position, a speed and / or an acceleration of the rotary vane (12) or of a component coupled to the rotary vane in motion, in particular the sliding block (36) or the pivot arm (40).

11. Method (50) for operating a pivoting sash drive system (10, 10') for a pivoting sash (12) of a door or window (14), in particular a fire door or fire window, wherein the pivoting sash (12) is pivotable between an open position (18) and a closed position (20), wherein the pivoting sash drive system (10, 10') is operable in at least a first operating mode and a second operating mode, wherein the method (50) in the first operating mode comprises the following steps: - holding (52) the pivoting sash (12) in the open position (18) by applying (52) to the pivoting sash (12) an opening torque in an opening direction (22) by means of a drive device (26) of the pivoting sash drive system (10, 10'), wherein the pivoting sash (12) is pivotable in the opening direction (22) from the closed position (20) to the open position (18). is;- Acquiring (54) sensor information by means of a sensor device (42) of the rotary door drive system (10, 10'), wherein the sensor information is representative of a position and / or a change in position of the rotary door (12) at least in one closing direction (24), wherein the rotary door (12) is pivotable in the closing direction (24) from the open position (18) to the closed position (20); - Determining (56), based on the sensor information, whether a position of the rotary door (12) in the closing direction (24) deviates from the open position (18); - Increasing (58) the opening torque if the position of the rotary door (12) in the closing direction (24) deviates from the open position (18);and - switching (60) from the first operating mode to the second operating mode based on a comparison of the opening torque with a torque threshold value, wherein the method (50) in the second operating mode comprises the following step: - releasing (62) the pivot wing for a closing movement in the closing direction (24).; 12. Method (50) according to claim 11, wherein in the step of changing from the first operating state to the second operating state, the change is made when the opening torque is greater than or equal to the torque threshold value.

13. Method (50) according to claim 11, wherein in the step of changing from the first operating state to the second operating state, the change is made when the opening torque is greater than or equal to the torque threshold value and the position of the rotary wing (12) in the closing direction (24) deviates from the open position (18) for a first predetermined period of time.

14. Method (50) according to claim 11, wherein in the step of changing from the first operating state to the second operating state, the change is made when the opening torque is greater than or equal to the torque threshold value for a second predetermined period of time.

15. Method (50) according to one of claims 15 to 18, wherein in the step of increasing the opening torque is continuously, in particular stepwise or continuously, increased as long as the position of the rotary wing (12) in the closing direction (24) deviates from the open position (18), and / or wherein the drive device (26), in particular in the step of releasing, in the second operating mode applies a closing torque to the rotary wing (12) in the closing direction (24).

Images