LOCKING DEVICE

Abstract

A device for locking a leaf of a door or the like comprising at least one electric motor operated as a generator having a motor shaft which is operatively connected to the leaf via a force transmission unit. The motor terminals of at least one electric motor operated as a generator are connected in this regard to a damping circuit for damping the leaf movements. The motor shaft of at least one electric motor operated as a generator is acted on by a brake unit to lock the leaf.

Claims

1. A device (10) for locking a leaf (12) of a door or the like comprising at least one electric motor (14; 16) operated as a generator, having a motor shaft which is operatively connected to the leaf (12) via a force transmission unit, wherein the motor terminals of at least one electric motor (14; 16) operated as a generator are connected to a damping circuit (22) for damping the leaf movements, and the motor shaft of at least one electric motor (14; 16) operated as a generator is acted on by a brake unit (24) for locking the leaf (12).

2. The locking device according to claim 1 wherein the brake unit (24) comprises an electromagnetic brake.

3. The locking device according to claim 1 wherein the locking device (10) comprises an evaluation and/or control unit (26), via which the brake unit (24) can be actuated.

4. The locking device according to claim 3 wherein at least one electric motor (14; 16) operated as a generator is connected via the motor terminals thereof to a charging circuit, via which the evaluation and/or control unit (26) can be supplied with electrical energy.

5. The locking device according to claim 1 wherein the brake unit (24) can be operated in a monostable manner according to the open-circuit principle.

6. The locking device according to claim 1 wherein the brake unit (24) can be operated in a bistable manner.

7. The locking device according to claim 1 wherein the locking device (10) comprises at least two electric motors (14; 16) operated as generators, of which one is connected via the motor terminals thereof to the damping circuit (22) and the other is connected via the motor terminals thereof to the charging circuit.

8. The locking device according to claim 7 wherein in order to lock the leaf (12), the motor shaft of the electric motor (16), connected via the motor terminals thereof to the charging circuit, and/or the motor shaft of the electric motor (14), connected via the motor terminals thereof to the damping circuit (22), can be acted on by the brake unit (24).

9. The locking device according to claim 1 wherein the damping circuit (22) can be actuated via the evaluation and/or control unit (26).

10. The locking device according to claim 9 wherein the damping circuit (22) comprises at least one switching element, which can be actuated via the evaluation and/or control unit (26) and via which a pulse-width modulation of the motor current can be carried out.

11. The locking device according to claim 1 wherein the brake unit (24) can be actuated via the evaluation and/or control unit (26) to generate a time-limited locking of the leaf (12).

12. The locking device according to claim 1 wherein the brake unit (24) can be actuated via the evaluation and/or control unit (26) for setting a predefinable delayed closing action of the leaf (12).

13. The locking device according to claim 1 wherein the brake unit (24) can be actuated via the evaluation and/or control unit (26) according to output signals from a safety sensor system.

14. The locking device according to claim 1 wherein, in the case of a two-leaf door having one fixed leaf and one through-passage leaf, at least one electric motor (14; 16) operated as a generator is associated in each case with the two leaves (12), and to lock the two leaves (12), in each case the motor shaft of at least one electric motor associated with a leaf (12) is acted on by a brake unit (24).

15. The locking device according to claim 14 wherein the closing sequence of the two leaves (12) can be controlled and/or regulated via the evaluation and/or control unit (26).

16. The locking device according to claim 14 wherein in the case of a two-leaf door having a fixed leaf and a through-passage leaf, the evaluation and control unit (26) is equipped with an additional accumulator or battery (42).

17. The locking device according to claim 1 wherein in the case of a leaf (12) of a fire door or the like, the brake unit (24) associated with the leaf can be actuated via the evaluation and/or control unit (26) such that a locking of the leaf (12) is released in the event of fire.

18. A door closer (44) comprising a mechanical energy store (46) which is chargeable with potential energy by manually opening the door leaf, said energy being able to be used for closing the door leaf, and comprising a locking device, characterized in that the locking device (10) is implemented according to claim 1.

Description

[0037] The invention is subsequently explained in greater detail with reference to the drawing. The single FIGURE shows, in schematic representation, an exemplary embodiment of a device 10 according to the invention for locking a leaf 12 of a door or the like. In the present case, this is, for example, a leaf 12 of a swing door.

[0038] Locking device 10 comprises at least one electric motor 14, 16 operated as a generator, having a motor shaft which is connected to leaf 12 via a force transmission unit such that a movement of leaf 12 is accompanied by a movement of the motor shaft. The force transmission unit can in this regard also, inter alia, comprise in particular a transmission 18, 20.

[0039] The motor terminals of at least one electric motor 14, 16 operated as a generator are connected to a damping circuit 22 for damping the leaf movements, wherein only the motor terminals of electric motor 14 are connected to such a damping circuit 22 according to the embodiment shown in the single FIG. 1. In the present case, only electric motor 14 of the two electric motors 14, 16 functions as a damping motor.

[0040] To lock leaf 12, the motor shaft of at least one electric motor 14, 16 operated as a generator can be acted on by a brake unit 24, wherein only the motor shaft of electric motor 16 is acted on by such a brake unit 24 according to the embodiment shown in FIG. 1. Brake unit 24 can comprise, in particular, an electromagnetic brake.

[0041] Locking device 10 comprises control electronics having an evaluation and/or control unit 46, via which brake unit 24 can be actuated.

[0042] At least one electric motor 14, 16 operated as a generator can be connected via the motor terminals thereof to a charging circuit for charging an energy store 28. In the embodiment shown in FIG. 1, only electric motor 16 is connected via the motor terminals thereof to such a charging circuit provided for charging energy store 28. The charging circuit is likewise part of the evaluation and control electronics of locking device 10, like the damping circuit and evaluation and/or control unit 26. However, damping circuit 22 in particular can also be integrated in evaluation and/or control unit 26.

[0043] Evaluation and/or control unit 26 can be supplied with electrical energy via the charging circuit or via energy store 28 which is chargeable via same. Thus, autonomous operation without an external supply of electrical energy is possible.

[0044] Brake unit 24 can be operated in either a monostable or bistable manner according to the open-circuit principle.

[0045] In the embodiment shown in FIG. 1, the locking device thus comprises two electric motors 14, 16 operated in each case as generators, of which one, namely electric motor 14, is connected via the motor terminals thereof to damping circuit 22, and the other, namely electric motor 16, is connected via the motor terminals thereof to the charging circuit for charging energy store 28.

[0046] In order to lock leaf 12, basically the motor shaft of electric motor 16, connected via the motor terminals thereof to the charging circuit, and/or the motor shaft of electric motor 14, connected via the motor terminals thereof to damping circuit 22, can be acted on by brake unit 24. Basically, such an embodiment is also conceivable in which such a brake unit is associated with each electric motor. In the embodiment shown in FIG. 1, only the motor shaft of electric motor 16, connected via the motor terminals thereof to the charging circuit for charging energy store 28, is acted on by a brake unit 24.

[0047] Damping circuit 22, which, like the charging circuit with associated energy store 28, is associated with the evaluation and/or control electronics, can be actuated via evaluation and/or control unit 26. As previously mentioned, damping circuit 22 can also be integrated in evaluation and/or control unit 26.

[0048] Damping circuit 22, connected to the motor terminals of electric motor 14 functioning as a damping motor can comprise at least one switching element, which can be actuated via evaluation and/or control unit 26, and via which a pulse-width modulation of the motor current can be carried out. The movement of leaf 12, in particular according to the position, speed, and/or direction of rotation of leaf 12, can be damped in the process by a corresponding short circuit, for example, via pulse-width modulation, of electric motor 14 functioning as a damping motor.

[0049] Brake unit 24 can be actuated via evaluation and/or control unit 26, in particular to generate a time-limited locking of leaf 12.

[0050] Brake unit 24 is can be actuated in the process via evaluation and/or control unit 26, for example, for setting a predefined delayed closing action of leaf 12.

[0051] Alternatively or additionally, brake unit 24 can also be actuated via evaluation and/or control unit 26 according to output signals from a safety sensor system.

[0052] Alternatively or additionally, in the case of a two-leaf door having one fixed leaf and one through-passage leaf, at least one electric motor 14, 16 operated as a generator can be associated in each case with the two leaves 12, and to lock the two leaves 12, the motor shaft of at least one electric motor 14, 16 associated in each case with one leaf 12 can be acted on by a brake unit 24. The closing sequence of the two leaves 12 can be controlled and/or regulated in the process via evaluation and/or control unit 26.

[0053] Alternatively or additionally, in the case of a leaf 12 of a fire door or the like, brake unit 24 associated with leaf 12 can also be actuable via evaluation and/or control unit 26 such that a locking of leaf 12 is released in the case of fire. This ensures that the leaf is closed by the associated mechanical store in the event of fire.

[0054] As can be seen from FIG. 1, evaluation and/or control unit 26 can actuate brake unit 24 and/or damping circuit 22 thus, for example, according to a signal 30, which can be predefined in the case of a delayed closing action, for example, by a switch 32 and/or a person detector 34 and/or by a safety sensor system 36, and/or in the case of a fire door by a fire alarm, and/or in the case of a two-leaf door having one fixed leaf and one through-passage leaf by a closing sequence specification 40 and/or the like.

[0055] In particular, for longer delay times, an additional accumulator or an additional battery 42 can also be provided to supply evaluation and/or control unit 26 with electrical energy. In the case of a two-leaf door, energy stores 28, 28 of the locking devices or the door closers associated with the two leaves 12 can be coupled to one another. In particular, for switching a bistable locking, there is always sufficient electrical energy available when in each case a leaf is moved while the locking of the other has to be stopped, as this was already explained in detail at the outset.

[0056] As can also be seen from FIG. 1, locking device 10 according to the invention can be integrated, in particular, in a door closer 44 having a mechanical energy store 46 which is chargeable with potential energy by manually opening door leaf 12, said energy being able to be used to close door leaf 12. Mechanical energy store 46 of door closer 44 in this regard can comprise in particular a spring unit.

[0057] Using a locking device 10 according to the invention, a time-limited locking of a door leaf can thus be implemented for a generatively damped door closer, for example, for a delayed closing action in conjunction with a safety sensor, for a closing sequence for a two-leaf door, and/or according to at least one fire alarm. The generatively damped door closer can in this regard be provided with a monostable or bistable locking device and/or the locking is guaranteed to be supplied with electrical energy from an autonomous energy store.

[0058] In general, the leaf movement can be damped, in particular, as described in DE 10 2015 200 284 B3, the disclosure of which is incorporated herein.

[0059] Upon opening door leaf 12, the spring unit of mechanical energy store 46 is tensioned. At the same time, the two electric motors 14, 16 turn. Electric motor 16 functioning as a generator motor generates electrical energy via the charging circuit, which is stored in energy store 28, the status of which can be monitored by evaluation and/or control unit 26. Energy store 28 supplies evaluation and/or control unit 26 with electrical energy. The movements of leaf 12 are damped according to the position, speed, and or direction of rotation of leaf 12 by evaluation and/or control unit 26 via damping circuit 22, for example by a short circuit, using pulse width modulation, of the motor terminals of electric motor 14 functioning as a damping motor. The position, speed, and/or direction of rotation of leaf 12 can be detected via a corresponding measuring circuit 48 and transmitted to evaluation and/or control unit 26. For certain situations, a time-limited locking of leaf 12 is possible by a corresponding actuation, by evaluation and/or control unit 26, of brake unit 24, associated with electric motor 16 functioning as a generator motor.

REFERENCE NUMERALS

[0060] 10 Locking device [0061] 12 Leaf [0062] 14 Electric motor [0063] 16 Electric motor [0064] 18 Transmission [0065] 20 Transmission [0066] 22 Damping circuit [0067] 24 Brake unit [0068] 26 Evaluation and/or control unit [0069] 28 Energy store [0070] 30 Signal [0071] 32 Switch [0072] 34 Person detector [0073] 36 Safety sensor system [0074] 38 Fire alarm [0075] 40 Closing sequence [0076] 42 Additional accumulator/battery [0077] 44 Door closer [0078] 46 Mechanical energy store [0079] 48 Measuring circuit