BRAKING DEVICE FOR A MOVABLE DOOR LEAF AND A DOOR CLOSER HAVING SUCH A BRAKING DEVICE

Abstract

A braking device for a moveable door leaf comprises an electrical brake motor being operated as a generator, the motor shaft of which is rotatable by a movement of the door leaf and which can be controlled for regulating the closing speed of the door leaf by means of an electronic evaluation and control unit, which is at least partially providable with electrical energy by an electric motor being operated as a generator, particularly the brake motor, and/or by means of an additional generator unit. The electronic evaluation and control unit is thus operable in a sleep mode and is cyclically displaceable into a waking state depending on the closing speed of the door leaf, wherein the wake-up frequency with which the electronic evaluation and control unit is cyclically awakened during a respective closing movement of the door leaf is less at relatively lower closing speeds of the door leaf than at relatively greater closing speeds of the door leaf. A door closer with a mechanical energy storage and a correspondingly designed braking device is also disclosed.

Claims

1. A braking device (12) for a moveable door leaf (18) having an electrical brake motor (20) being operated as a generator, the motor shaft (22) of which is rotatable by a movement of the door leaf (18) and which can be controlled for regulating the closing speed of the door leaf (18) by means of an electronic evaluation and control unit (28), which is at least partially providable with electrical energy by an electric motor (20) being operated as a generator, particularly the brake motor and/or by means of an additional generator unit, wherein the electronic evaluation and control unit (28) is thus operable in a sleep mode and cyclically displaceable into a waking state depending on the closing speed of the door leaf (18), and wherein the wake-up frequency with which the electronic evaluation and control unit (28) is cyclically awakened during a respective closing movement of the door leaf (18) is less at relatively lower closing speeds of the door leaf (18) than at a relatively higher closing speed of the door leaf (18).

2. The braking device according to claim 1, wherein the closing speed of the door leaf (18) is adjustable by the electronic evaluation and control unit (28) during a respective waking state of the electronic evaluation and control unit (28).

3. The braking device according to claim 1, wherein the motor terminals (24) can be short-circuited for producing a respective braking force by means of a braking circuit (26).

4. The braking device according to claim 1, wherein a means (40) connected with the electronic evaluation and control unit (28) is provided to detect a closing and/or opening movement of the door leaf (18).

5. The braking device according to claim 1, wherein a means (42) connected with the electronic evaluation and control unit (28) is provided to determine the current closing speed of the door leaf (18).

6. The braking device according to claim 1, wherein a means (44) connected with the electronic evaluation and control unit (28) is provided to determine the current opening angle of the door leaf (18).

7. The braking device according to claim 1, wherein the evaluation and control unit (28) ends the dampening of the closing movement of the door leaf (18) when the door leaf (18) has achieved at least one settable final stop condition.

8. The braking device according to claim 7, wherein a final stop speed and/or a final stop position can be specified as the final stop condition.

9. A door closer (10) having a mechanical energy storage (16), which is rechargeable (18) through the manual opening of the door leaf (18) and which discharges with the closing of the door leaf (18) and has a braking device (12) according to claim 1.

10. The door closer according to claim 9, wherein the mechanical energy storage (16) comprises a spring unit, which is tensioned by the manual opening of the door leaf (18) and relaxes with the closing of the door leaf (18).

Description

DESCRIPTION OF THE DRAWING

[0017] Preferred embodiments of the braking device according to the invention and the door closer according to the invention result from the dependent claims, the present description and the drawing.

[0018] FIG. 1 illustrates an embodiment of the braking device and door closer as disclosed.

DETAILED DESCRIPTION

[0019] The invention is explained in more detail below on the basis of an exemplary embodiment with reference to the drawing. In this, the single figure shows a schematic representation of an exemplary embodiment of a door closer 10 according to the invention with an exemplary embodiment of a braking device 12 according to the invention.

[0020] The door closer 10 comprises a housing 14, in which a mechanical energy storage 16 and the braking device 12 are arranged.

[0021] The mechanical energy storage 16 preferably comprises a spring unit and is charged with potential energy by manually opening the door leaf 18, which then closes the released door leaf 18 again.

[0022] The braking device 12 dampens the movement of the door leaf 18 and comprises an electric motor 20 being operated as a generator, the motor shaft 22 of said electric motor 20 being rotatable by a movement of the door leaf 18 and the motor terminals 24 of said electric motor 20 being arranged on a braking circuit 26, which can be controlled for regulating the closing speed of the door leaf 18 by means of an electronic evaluation and control unit 28. The electronic evaluation and control unit 28 being provided to regulate the closing speed of the door leaf 18 is thus at least partially providable with electrical energy by an electric motor 20 being operated as a generator and/or by means of an additional generator unit.

[0023] As can further be seen in the represented exemplary embodiment from FIG. 1, the door closer 10 with its housing 14 is, for example, fixedly mounted on the upper left edge region of the moveable door leaf 18. The motor shaft 22 of the electric motor 20 being operated as a generator is coupled via a gear 30 with an output shaft 32, said output shaft for example being coupled in the present case to a sliding arm 34. The sliding arm 34 features, at its free end, a sliding block 36 which is guided in a fixedly mounted sliding rail 38. The electric motor 20 being operated as a generator can for example be designed as an energised permanent magnet direct current motor.

[0024] During opening and closing of the door leaf 18, the motor shaft 22 of the electric motor 20 is rotated by means of the gear 30. The mechanical energy storage 16 comprising for example a spring unit can be thereby tensioned or relaxed, which however is not compulsory. With cantilevered systems, the mechanical energy storage 16 or the spring unit can, for example, be held in the tensioned position (door open), wherein the motor shaft 22 is however still rotated when the door leaf 18 is moved.

[0025] According to the invention, the electronic evaluation and control unit 28 is thus operable in a sleep mode and cyclically displaceable into a waking state depending on the closing speed of the door leaf 18, wherein the wake-up frequency with which the electronic evaluation and control unit 28 is cyclically awakened during a respective closing movement of the door leaf 18 is less at relatively lower closing speeds of the door leaf 18 than at relatively higher closing speeds of the door leaf 18.

[0026] The closing speed of the door leaf 18 is adjustable by the electronic evaluation and control unit 28 during a respective waking state of the electronic evaluation and control unit 28.

[0027] The motor terminals 24 of the electric motor 20 being operated as a generator can in particular be short-circuited for producing a respective braking force by means of a braking circuit 26.

[0028] With the electronic evaluation and control unit 28, means 40 for detected a closing and/or opening movement of the door leaf 18, means 42 for determining the current closing speed of the door leaf 18 and/or means 44 for determining the current opening angle of the door leaf 18 can be provided.

[0029] The electronic evaluation and control unit 28 can also be designed such that it terminates the dampening of the closing movement of the door leaf 18, when the door leaf 18 has achieved at least one settable final stop condition. For example, a final stop speed and/or a final stop position can be specified as the final stop condition.

LIST OF REFERENCE SYMBOLS

[0030] 10 Door closer

[0031] 12 Braking device

[0032] 14 Housing

[0033] 16 Mechanical energy storage

[0034] 18 Door leaf

[0035] 20 Electric motor

[0036] 22 Motor shaft

[0037] 24 Motor terminals

[0038] 26 Braking circuit

[0039] 28 Electronic evaluation and control unit

[0040] 30 Gear

[0041] 32 Output shaft

[0042] 34 Sliding arm

[0043] 36 Sliding block

[0044] 38 Sliding rail

[0045] 40 Means for detecting a closing and/or opening movement

[0046] 42 Means for determining the closing and/or opening speed

[0047] 44 Means for determining the opening angle