DE102012210814B4 - Drive for opening and/or closing a movable leaf of a door or a window and method for operating this drive - Google Patents

Abstract

Drive (1) for opening and/or closing a movable wing (2) of a door or a window, with an output shaft (6) which is operatively connected to the wing (2) and to a drive motor device and is non-rotatably mounted with a cam disc (11). and with a spring device (21) which acts on the leaf (2) in the closing or opening direction by means of a carriage (13) operatively connected to the spring device (21), and with a locking device (15) which can be switched on and off and which in the switched-on position the spring device (21) is locked in a prestressed manner, the locking device (15) being designed in such a way that the spring device (21) becomes effective when the wing (2) reaches a predetermined opening angle, the carriage (13) having a pressure roller (12). Which cooperates with the outer contour of the cam (11) by the pressure roller (12) by the spring means (21) against the cam (11) can be acted upon, wherein the Compression of the spring device (21) in the last angular degrees of the opening movement of the wing (2) causes its deceleration, so that the drive motor device has to apply less braking power, ideally no braking power at all.

Description

The invention relates to a drive for opening and/or closing a movable leaf of a door or a window and a method for operating this drive.

From the EP 0 693 609 B1 a drive for opening and/or closing a movable leaf of a door or a window is known. The drive has an output shaft which is operatively connected to the vane. Furthermore, the drive has a spring device which acts on the leaf in the closing direction. A locking device that can be switched on and off locks the prestressed spring device in the switched-on position. The spring device becomes effective in emergency operating conditions, for example in the event of a fire and/or failure of the electrical power supply, in that the locking device preferably switches itself off automatically, and then ensures that the sash closes securely. This does have the advantage that the drive motor of the drive does not have to work against the force of the spring device during normal operation and can be designed to be correspondingly smaller and therefore more space-saving and energy-saving. The disadvantage, however, is that braking the opening movement requires a high motor current. "Creeping" of the locking device, which can occur due to leaks in the hydraulic system, for example, can have a negative effect on the operating properties of the drive.

From the DE 10 2004 061 686 A1 a vehicle door with a variable latching function is known. The vehicle door is locked if it comes to a standstill after manual operation outside of the closed position. This function only becomes effective from a certain opening angle, ie if the vehicle door is stationary below this opening angle, the vehicle door will not be locked.

the DE 195 13 434 A1 describes a door closer that has an energy store with a closing spring for closing a door leaf. The energy store is charged when the door leaf opens and discharged when it closes.

From the U.S.A. 4,115,897 there is known a door latch assembly for moving an associated door from an open position to a closed position. The door latch assembly includes a housing, a chamber located in the housing, and biasing means located in the chamber for providing a restoring force to move the door to its closed position. A piston is slidably disposed in the chamber, the piston being movable in a first direction against the force of the biasing means as the door moves toward an open position and being biased thereby in a second direction, opposite the first direction is. The door latch assembly also includes means for disabling the biasing means.

The object of the invention is to optimize a generic drive with regard to its operating behavior.

The object is achieved by the features of patent claim 1 and patent claim 7 .

The dependent claims form advantageous configuration options of the invention.

The locking device is designed in such a way that the spring device becomes effective once a predetermined opening angle of the wing has been reached. The opening movement no longer has to be slowed down by the drive motor alone. In addition, the closing movement is supported by the spring device, which relaxes in part up to the predetermined opening angle, as a result of which the energy consumption of the drive motor is reduced.

The adjustable opening angle of the leaf, from which the spring device becomes effective, is unequal to the fully closed or fully open position.

An advantageous embodiment of the invention, which is simple in design and reliable in operation, is that the locking device can have at least one spring piston which liquid-tightly divides a cylinder into at least two pressure chambers, the pressure chambers being connected to one another via at least one hydraulic line.

The locking device can have at least one electrically switchable check valve, which is arranged in the hydraulic line. The predetermined opening angle can be optimized by appropriate activation of the check valve, for example in the event of a changing operating behavior of the drive and/or changing external influencing variables.

The locking device can have at least one damping valve, which is arranged in the hydraulic line. Instead of the damping valve or in addition, a fixed throttle can be provided, or a narrower line cross-section. This dampens the movement of the spring piston when its lock is released, which prevents the Spring piston or a component operatively connected to it strikes hard against a drive component operatively connected to the drive motor.

An exemplary embodiment in the drawing is explained in more detail below with reference to the figures.

• 1 einen an der Bandseite eines Drehtürflügels montierten Antrieb in Frontansicht;
• 2 eine schematische Darstellung der Arretiereinrichtung des Antriebs gemäß 1, in einem ersten Betriebszustand;
• 3 eine Darstellung gemäß 2, jedoch in einem zweiten Betriebszustand;
• 4 eine Darstellung gemäß 2 und 3, jedoch in einem dritten Betriebszustand;
• 5 eine Darstellung gemäß 2 bis 4, jedoch in einem vierten Betriebszustand;
• 6 eine Darstellung gemäß 2 bis 5, jedoch in einem fünften Betriebszustand;
• 7 eine Darstellung gemäß 2 bis 6, jedoch in einem sechsten Betriebszustand.

show:

• 1 a front view of a drive mounted on the hinge side of a revolving door leaf;
• 2 a schematic representation of the locking device of the drive according to FIG 1 , in a first operating state;
• 3 a representation according to 2 , but in a second operating state;
• 4 a representation according to 2 and 3 , but in a third operating state;
• 5 a representation according to 2 until 4 , but in a fourth operating state;
• 6 a representation according to 2 until 5 , but in a fifth operating state;
• 7 a representation according to 2 until 6 , but in a sixth operating state.

the 1 shows a drive 1 mounted on a revolving door. The revolving door has a leaf 2 designed as a revolving door leaf, which is mounted on a stationary frame 3 via hinges 4 such that it can rotate about a vertical axis of rotation. The drive 1 includes a housing 5 which is arranged in the upper horizontal area of the frame 3 . An output shaft 6 with a vertical axis of rotation is mounted in the housing 5 of the drive 1 , with at least one end of the output shaft 6 protruding from the housing 5 . At the lower end of the output shaft 6 facing the wing 2, one end of a force transmission element 7 designed as a sliding arm is mounted in a rotationally fixed manner. The other end of the force transmission element 7 is guided in a linearly displaceable manner in a guide rail 8 mounted in the region of the upper horizontal edge of the wing 2 by means of a guide element 10, which is designed, for example, as a slider or roller and is mounted on the force transmission element 7 so that it can rotate about an axis of rotation 9 . A rotational movement of the output shaft 6 of the drive 1 causes the power transmission element 7 to pivot and move the wing 2 via the guide element 10 guided in the guide rail 8, and vice versa.

The drive 1 has a control device, not shown here, which controls the movement of the drive 1, for example depending on sensor signals and / or manual switching operations and on the position and / or movement speed of the operatively connected leaf 2. The control device can include a memory device in which the parameters required for operating the drive 1 can be stored, preferably in a non-volatile manner.

In the 2 until 7 according to FIG 1 shown schematically in several operating states. The locking device 16 comprises a housing 16, in the chamber of which a spring piston 20 is slidably mounted. The housing 16 can be designed in one piece with the housing of the drive 1 or also separately from it. The spring piston 20 divides the chamber of the housing into two pressure chambers 22, 23 in a liquid-tight manner.

The two pressure chambers 22, 23 are filled with a hydraulic medium. In the housing 16 there is a hydraulic line arrangement 25 which connects the pressure chambers 22, 23 to one another. A damping valve 26 is present in the hydraulic line arrangement 25 . A check valve 27 with a pressure relief valve 28 connected in parallel is located in the hydraulic line arrangement 25 between the damping valve 26 and the second pressure chamber 23, which is on the right in the drawing , i.e. that the shut-off valve 27 is in its shut-off position when energized and automatically switches to the open position when the energization ceases or is switched off. A compensating chamber 29 located in the housing 16 is connected to the hydraulic line arrangement 25 between the first pressure chamber 22 and the damping valve 26 . The compensation space 29 is bounded on the outside by a cover 30 which has an opening 31 for the passage of air. A piston 32 is displaceable within the compensation chamber 29 and guided in a liquid-tight manner relative to the inner wall of the compensation chamber, the piston 32 being urged to the right in the drawing by a spring 33 supported on the cover 30 . Also inside the spring piston 20 is a hydraulic line designed with a check valve, for example a ball valve, between the pressure chambers 22, 23, the check valve enabling the hydraulic medium to flow through from the first pressure chamber 22 into the second pressure chamber 23, from the second pressure chamber 23 into the first Pressure chamber 22, however, locks.

A spring device 21 located in the first pressure chamber 22, for example a helical compression spring, is supported between the cover 17 and the spring piston 20 and acts on the spring piston 20 to the right in the drawing. The cover 17 has an opening 18 through which a piston rod 19 passes, the opening 18 having a seal which allows a displacement movement of the piston rod 19 but seals it in a liquid-tight manner. The piston rod 19 is connected to the spring piston 20 at one end and to a carriage 13 at the other end. The carriage is slidably mounted within the drive 1 and has an elongated, for example oval recess 14 through which the output shaft 6 of the drive passes. On the output shaft 6 a cam 11 is rotatably mounted. In this exemplary embodiment, the cam disk 11 is designed with a symmetrical, heart-shaped outer contour here, although other shapes are also conceivable. A pressure roller 12 is arranged on the carriage 13 and interacts with the outer contour of the cam disk 11 in that the pressure roller 12 is acted upon by the spring device 21 against the cam disk 11 .

The output shaft 6 is operatively connected to a drive motor device of the drive 1, which is not shown here because it is not essential to the invention. The drive motor device can have an electric drive motor in a known manner, which interacts with the output shaft 6 via a suitable reduction gear, so that energization of the drive motor triggered by the control device of the drive 1 causes the output shaft 6 to rotate and thus also a corresponding movement of the connected wing 2 effected in the opening or closing direction.

To you 2 shows the drive in a first operating state. The output shaft 6 is in a position which corresponds to the closed position of the operatively connected wing 2 . In this operating state, which can exist, for example, before the drive 1 is put into operation for the first time, the spring device 21 is relatively slightly pretensioned and presses the pressure roller 12 of the carriage 13 against the cam disk 11 of the output shaft 6.

An energization of the drive motor device can now cause a rotation of the output shaft 6, for example clockwise, and thus a corresponding opening movement of the connected leaf 2. This is in FIG 3 shown. The rotation of the cam disc 11 (arrow B) increases the effective radius of the contact point with the pressure roller 12, so that the carriage 13 and the piston rod 19 connected thereto are shifted to the left in the drawing (arrow C). The spring device 21 is now maximally prestressed via the spring piston 20 . The check valve 27 in the hydraulic line arrangement 25 is also still in the open position in this operating state. The check valve 24, which is also open in this direction of movement of the spring piston 20, allows the hydraulic medium to flow through almost undamped from the decreasing first pressure chamber 22 into the correspondingly increasing second pressure chamber 23 first pressure chamber 22 moving out piston rod 19 to the right.

When the closing movement of the wing 2, which is operatively connected to the drive 1, is initiated by the control device of the drive 1, the check valve 27 in the hydraulic line arrangement 25 is initially still in the open position.

The output shaft 6 and the cam disk 11 now rotate, actuated by the drive motor device and additionally supported by the relaxing spring device 21, counterclockwise (arrow direction B), and the carriage 13 moves to the right in the drawing (arrow direction C). In the 4 the predetermined angle of rotation of the output shaft 6 is shown, which can correspond, for example, to an opening angle of the wing 2 of 70°, at which the check valve 27 is switched from its open position to its locked position. This prevents the hydraulic medium from flowing further from the second pressure chamber 23 into the first pressure chamber 22, as a result of which the spring piston 20 is locked in this position. The components connected to the spring piston 20, in particular the pressure roller 12, also remain in this position. With a further rotation of the drive shaft 6 counterclockwise, i.e. in the closing direction of the connected leaf 2, the outer contour of the cam disc 11 is thus lifted off the pressure roller 12, and the further closing movement until the leaf 2 is in the completely closed position is actuated exclusively by the drive motor device. 5 shows a rotation angle of the output shaft 6, which is present shortly before the closed position of the wing 2 is reached, and in 6 shows the position of the drive components when the wing 2 is completely closed.

A renewed opening movement of the wing 2 is actuated exclusively by the drive motor device. The drive motor device therefore only has to accelerate the wing 2 and does not have to apply any additional force to compress the spring device 21 .

From the already one of 4 shown opening angle of the wing 2, the outer contour of the cam 11 again comes into contact with the pressure roller 12, and with the further opening movement of the wing 2 there is a compression of the spring device 21 until a position is reached as already in FIG 3 has been shown. The compression of the spring device 21 in the last angular degrees of the opening movement of the wing 2 causes its deceleration, so that the drive motor device has to apply less braking power, ideally no braking power at all.

If there is a fire and/or failure of the electrical power supply of the drive 1 when the wing 2 is closed, the check valve 27 in the hydraulic line arrangement 25 is preferably automatically switched over to its open position, and the spring device 21 pushes the spring piston 20 to the right in the drawing. The hydraulic medium displaced from the second pressure chamber 23 flows through the damping valve present in the hydraulic line arrangement 25, so that the movement of the spring piston 20 and the components operatively connected thereto (arrow C), in particular the pressure roller 12, are damped. This prevents the pressure roller 12 from hitting the cam disc 11, which protects the drive 1 from damage and/or prevents annoying noises. The volume of hydraulic medium displaced by the piston rod 19 moving into the first pressure chamber 22 leads to a displacement of the piston 32 of the compensation chamber to the left in the drawing under compression of the associated spring 33.

Reference List

1

drive

2

wing

3

frame

4

hinge

5

Housing

6

output shaft

7

power transmission element

8th

guide rail

9

axis of rotation

10

guide element

11

cam disk

12

pressure roller

13

Sleds

14

recess

15

locking device

16

Housing

17

lid

18

opening

19

piston rod

20

spring plunger

21

spring device

22

pressure room

23

pressure room

24

check valve

25

hydraulic line arrangement

26

damping valve

27

check valve

28

pressure relief valve

29

balancing room

30

lid

31

opening

32

Pistons

33

Feather

A

direction of movement

B

direction of movement

C

direction of movement

Claims (8)

Drive (1) for opening and/or closing a movable leaf (2) of a door or a window, with an output shaft (6) which is operatively connected to the leaf (2) and to a drive motor device and is non-rotatably mounted with a cam disc (11). and with a spring device (21) which acts on the leaf (2) in the closing or opening direction by means of a carriage (13) operatively connected to the spring device (21), and with a locking device (15) which can be switched on and off and which in switched-on position, the spring device (21) is locked in a pretensioned manner, the locking device (15) being designed in such a way that the spring device (21) becomes effective once a predetermined opening angle of the wing (2) has been reached, the carriage (13) having a pressure roller (12 ) which interacts with the outer contour of the cam disc (11) in that the pressure roller (12) can be acted upon by the spring device (21) against the cam disc (11), wherein the compression of the spring device (21) in the last angular degrees of the opening movement of the wing (2) causes its deceleration, so that the drive motor device has to apply less braking power, ideally no braking power at all. drive after claim 1 , characterized in that the adjustable opening angle of the wing (2), from which the spring device (21) becomes effective, is not equal to the fully closed or fully open position. drive after claim 1 or 2 , characterized in that the locking device (15) has at least one spring piston (20) which liquid-tightly divides a cylinder into at least two pressure chambers (22, 23), the pressure chambers being connected to one another via at least one hydraulic line (25). drive after claim 3 , characterized in that the locking device (15) has at least one damping valve (26) which is arranged in the hydraulic line (25). drive after claim 3 or 4 , characterized in that the locking device (15) has at least one electrically switchable check valve (27) which is arranged in the hydraulic line (25). drive after one claim 5 , characterized in that the check valve (27) is designed according to the working flow principle. Method for operating a drive (1) according to one of Claims 1 until 6 for opening and/or closing a movable wing (2) of a door or a window between a first or a second end position, wherein the wing (2) is operatively connected to an output shaft (6) of the drive (1), and wherein a spring device ( 21) of the drive acts on the leaf (2) in the closing or opening direction, and wherein a locking device (15) of the drive (1) that can be switched on and off locks the spring device (21) in a pretensioned manner in the switched-on position, the method comprising the following steps : in a first direction of movement of the wing (2), the spring device (21) is locked by the locking device (15) once a predetermined opening angle of the wing (2) has been reached, further movement of the wing (2) in this first direction of movement up to the first end position is actuated exclusively by a drive motor device of the drive (1), a movement of the wing (2) in the opposite, second movement g direction is also actuated exclusively by a drive motor device of the drive (1) from the first end position up to the predetermined opening angle End position effective again. procedure after claim 7 , characterized in that the movement of the wing (2) in the second direction of movement from the predetermined opening angle to the second end position is braked by the spring device.

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