Brake device for a movable door leaf and door closer with such a brake device

Abstract

Braking device (12) for a movable door leaf (18), comprising an electric brake motor (20) 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 by an electronic evaluation and control unit (28) to regulate the closing speed of the door leaf (18), which can be supplied with electrical energy at least partially via an electric motor (20) operated as a generator, in particular the brake motor and / or via an additional generator unit, wherein the electronic evaluation and control unit (28) can be operated in a sleep mode and can be cyclically brought into a wake-up 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 woken up during a respective closing movement of the door leaf (18),at relatively lower closing speeds of the door leaf (18) is smaller than at relatively higher closing speeds of the door leaf (18), and wherein means (42) connected to the electronic evaluation and control unit (28) are provided for determining the current closing speed of the door leaf (18).

Description

[0001] The invention relates to a braking device for a movable door leaf with an electric brake motor operated as a generator, the motor shaft of which is rotatable by a movement of the door leaf and which can be controlled by an electronic evaluation and control unit to regulate the closing speed of the door leaf, which can be supplied with electrical energy at least partially via an electric motor operated as a generator, in particular the brake motor, and / or via an additional generator unit. It further relates to a door closer with such a braking device.

[0002] A braking device of the type mentioned above is known, for example, from DE 10 2015 200 284 B3. In this device, the closing speed of the door leaf is controlled by a pulse-width modulated short circuit of the motor terminals of the electric motor, which is operated as a generator. Simultaneously, potential energy from the mechanical storage unit of the door closer, comprising a spring assembly, is converted into electrical energy to supply the electronic evaluation and control unit.

[0003] An alternative braking device is known from DE 10 2015 200 284 B3, which has an electric motor (22) operated as a generator.

[0004] US 2011 / 0 252 598 A1 describes a door closer with an automatic control unit that includes a gearbox configured to rotate in response to movement of a door.

[0005] If the door leaf closes slowly, the electric motor operating as a generator produces relatively little electrical power. Conversely, if the door leaf closes quickly, the electric motor operating as a generator produces relatively much electrical power. Since the electronics for controlling the closing speed of the door leaf in the braking device known from DE 10 2015 200 284 B3 are permanently active and therefore must be supplied with electrical energy by the electric motor operating as a generator, even at lower closing speeds, the electric motor operating as a generator must be relatively large, which is correspondingly expensive.

[0006] At lower closing speeds of the door leaf, only a relatively low control frequency is required. For example, with a closing time of 90 seconds from an opening angle of 90°, it is sufficient for the electronic evaluation and control unit to correct the speed only once per second. In contrast, with a relatively higher closing speed, such as a closing time of 3 seconds from an opening angle of 90°, a relatively high frequency, for example every 100 ms, is necessary.

[0007] The invention is based on the objective of providing a braking device and a door closer of the type mentioned above, in which the electric motor operated as a generator for the regenerative damping of the movement of the door leaf can be designed to be as small as possible and correspondingly cost-effective.

[0008] According to the invention, this problem is solved by a braking device with the features of claim 1 and a door closer with the features of claim 9. Preferred embodiments of the braking device and the door closer according to the invention are described in the dependent claims, the present description, and the drawing.

[0009] The braking device according to the invention for a movable door leaf comprises an electric brake motor operated as a generator, the motor shaft of which is rotatable by a movement of the door leaf and which can be controlled by an electronic evaluation and control unit to regulate the closing speed of the door leaf, which can be supplied with electrical energy at least partially via an electric motor operated as a generator, in particular the brake motor and / or via an additional generator unit.The electronic evaluation and control unit can be operated in a sleep mode and cyclically switched to a wake-up state depending on the closing speed of the door leaf, whereby the wake-up frequency with which the electronic evaluation and control unit is cyclically woken up during a respective closing movement of the door leaf is lower at relatively lower closing speeds of the door leaf than at relatively higher closing speeds of the door leaf.

[0010] By cyclically switching the electronic evaluation and control unit for regulating the closing speed of the door leaf from sleep mode to a wake-up state with a lower wake-up frequency at relatively lower closing speeds of the door leaf than at relatively higher closing speeds of the door leaf, it requires less electrical energy at relatively lower closing speeds, where the electric motor operated as a generator delivers less power, so that the electric motor operated as a generator can be made correspondingly smaller and more cost-effective.

[0011] Preferably, the closing speed of the door leaf during a respective wake-up state of the electronic evaluation and control unit can be controlled by the electronic evaluation and control unit.

[0012] Advantageously, the motor terminals can be short-circuited via a braking circuit to generate a respective braking force.

[0013] In a further advantageous embodiment of the braking device according to the invention, means for detecting a closing and / or opening movement of the door leaf are provided in conjunction with the electronic evaluation and control unit. Depending on whether a closing or opening movement of the door leaf is present, the wake-up frequency at which the electronic evaluation and control unit is awakened can then be preset accordingly.

[0014] It is particularly advantageous if means for determining the current closing speed of the wing are provided in conjunction with the electronic evaluation and control unit.

[0015] Alternatively or additionally, means connected to the electronic evaluation and / or control unit may also be provided for determining the current opening angle of the door leaf.

[0016] According to a practical embodiment of the braking device according to the invention, the electronic evaluation and control unit terminates the damping of the closing movement of the door leaf when the door leaf has reached at least one predefinable end-stop condition.

[0017] The finishing shot condition can, in particular, specify a finishing shot speed and / or a finishing shot position.

[0018] The door closer according to the invention preferably comprises a mechanical energy storage device which can be charged by manually opening the door leaf and discharges when the door leaf is closed, and a braking device, wherein it is characterized in that the braking device is designed according to the braking device according to the invention.

[0019] The mechanical energy storage device conveniently includes a spring unit that is tensioned by manually opening the door leaf and relaxes when the door leaf is closed.

[0020] The invention is explained in more detail below with reference to an exemplary embodiment and the drawing. The single figure in the drawing schematically shows an exemplary embodiment of a door closer 10 according to the invention, together with an exemplary embodiment of a braking device 12 according to the invention.

[0021] The door closer 10 comprises a housing 14 in which a mechanical energy storage device 16 and the braking device 12 are arranged.

[0022] The mechanical energy storage device 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.

[0023] The braking device 12 dampens the movement of the door leaf 18 and comprises an electric motor 20 operated as a generator, the motor shaft 22 of which is rotatable by a movement of the door leaf 18 and whose motor terminals 24 are connected to a braking circuit 26, which can be controlled by an electronic evaluation and control unit 28 to regulate the closing speed of the door leaf 18. The electronic evaluation and control unit 28, which is provided for regulating the closing speed of the door leaf 18, is supplied with electrical energy at least partially via the electric motor 20 operated as a generator, in particular the braking motor, and / or via an additional generator unit.

[0024] As from the Fig.As can be seen further in Figure 1, in the illustrated embodiment, the door closer 10 with its housing 14 is, for example, fixed to the upper left edge of the movable door leaf 18. The motor shaft 22 of the electric motor 20, which operates as a generator, is coupled via a gearbox 30 to an output shaft 32, which in this case is connected, for example, to a sliding arm 34. The sliding arm 34 has a sliding block 36 at its free end, which is guided in a slide rail 38 that is fixed to the door panel. The electric motor 20, which operates as a generator, can, for example, be designed as a permanent magnet DC motor.

[0025] When the door leaf 18 opens and closes, the motor shaft 22 of the electric motor 20 is rotated via the gearbox 30. During this process, the mechanical energy storage device 16, which may comprise a spring unit, can be tensioned or relaxed, although this is not mandatory. In free-swinging systems, the mechanical energy storage device 16 or the spring unit can, for example, be held in the tensioned position (door open), while the motor shaft 22 is still rotated when the door leaf 18 moves.

[0026] According to the invention, the electronic evaluation and control unit 28 can be operated in a sleep mode and cyclically brought into a wake-up 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 woken up during a respective closing movement of the door leaf 18 is lower at relatively lower closing speeds of the door leaf 18 and higher at relatively higher closing speeds of the door leaf 18.

[0027] The closing speed of the door leaf 18 can be controlled by the electronic evaluation and control unit 28 during each wake-up state of the electronic evaluation and control unit 28.

[0028] The motor terminals 24 of the electric motor 20, which is operated as a generator, can be short-circuited in particular to generate a respective braking force via a braking circuit 26.

[0029] The electronic evaluation and control unit 28 can be provided with means 40 for detecting 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.

[0030] The electronic evaluation and control unit 28 can also be designed to terminate the damping of the closing movement of the door leaf 18 when the door leaf 18 has reached at least one predefinable end-of-action condition. For example, an end-of-action speed and / or an end-of-action position can be predefinable as an end-of-action condition. Reference symbol list 10 door closers 12 Brake device 14 cases 16 mechanical energy storage devices 18 door leaves 20 electric motor 22 Motor shaft 24 motor terminals 26 Brake circuit 28 electronic evaluation and control units 30 gearboxes 32 Output shaft 34 sliding arm 36 sliding block 38 Sliding rail 40 means of detecting a closing and / or opening movement 42 Means for determining the closing and / or opening speed 44 Means for determining the opening angle

Claims

[1] Braking device (12) for a movable door leaf (18), comprising an electric brake motor (20) 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 by an electronic evaluation and control unit (28) to regulate the closing speed of the door leaf (18), which can be supplied with electrical energy at least partially via an electric motor (20) operated as a generator, in particular the brake motor and / or via an additional generator unit, wherein the electronic evaluation and control unit (28) can be operated in a sleep mode and can be cyclically brought into a wake-up 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 woken up during a respective closing movement of the door leaf (18),at relatively lower closing speeds of the door leaf (18) is smaller than at relatively higher closing speeds of the door leaf (18), and wherein means (42) connected to the electronic evaluation and control unit (28) are provided for determining the current closing speed of the door leaf (18). [2] Brake device according to claim 1, characterized by , that the closing speed of the door leaf (18) during a respective wake state of the electronic evaluation and control unit (28) can be controlled by the electronic evaluation and control unit (28). [3] Braking device according to at least one of the preceding claims, characterized by , that the motor terminals (24) can be short-circuited via a braking circuit (26) to generate a respective braking force. [4] Braking device according to at least one of the preceding claims, characterized by, that means (40) connected to the electronic evaluation and control unit (28) are provided for detecting a closing and / or opening movement of the door leaf (18). [5] Braking device according to at least one of the preceding claims, characterized by , that means (44) connected to the electronic evaluation and control unit (28) are provided for determining the current opening angle of the door leaf (18). [6] Braking device according to at least one of the preceding claims, characterized by , that the electronic evaluation and control unit (28) terminates the damping of the closing movement of the door leaf (18) when the door leaf (18) has reached at least one predefinable end-stop condition. [7] Brake device according to claim 6, characterized by , that a final stroke speed and / or a final stroke position can be specified as a final stroke condition. [8] Door closer (10) with a mechanical energy storage device (16) which can be charged (18) by manually opening the door leaf (18) and discharges when the door leaf (18) is closed, and with a braking device (12) according to at least one of the preceding claims. [9] Door closer according to claim 8, characterized by , that the mechanical energy storage device (16) includes a spring unit which is tensioned by manually opening the door leaf (18) and relaxes when the door leaf (18) is closed.

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