Electromechanical drive and corresponding fire door

Abstract

Electromechanical drive (10) for actuating a movable door leaf (60) of a fire door, comprising a motor and gearbox unit (30) which is operatively connected to the door leaf (60) via a power transmission device (50) and causes a movement of the door leaf (60), and a mechanical energy storage device (40) for closing the door, which is charged during an opening movement of the door leaf (60) and discharged by a closing movement of the movable door leaf (60), wherein the motor and gearbox unit (30) assists the mechanical energy storage device (40) during door closing and causes the door to close completely. where in an emergency operation in which a supply voltage (U G ) the motor and transmission unit (30) is switched off, an emergency supply (70) of the motor and transmission unit (30) an emergency supply voltage (U N) provides an emergency power supply (70) comprising a changeover switch (72) and an electrical energy storage device (74), wherein the changeover switch (72) comprises at least one relay contact which, in normal operation, supplies the motor and gearbox unit (30) with the supply voltage (U) G ) and in emergency operation, in which a supply voltage (U G ) the motor and transmission unit (30) is switched off, with the emergency supply voltage (U N ) of the electrical energy storage device (74), characterized in that a control electronics unit (20) monitors and operates the motor and gearbox unit (30) depending on the current operating state and / or a current temperature of the motor and gearbox unit (30) and / or a current direction of movement and / or a current speed and / or a current opening angle of the door leaf (60) and The control electronics (20) determine the current temperature of the motor and transmission unit (30) via a temperature sensor (32) and / or determine the current direction of movement and / or the current speed and / or the current opening angle of the door leaf (60) via a rotary encoder (34) or a position sensor.

Description

[0001] The invention relates to an electromechanical drive of the type mentioned in the preamble of claim 1 and a corresponding fire door with such an electromechanical drive.

[0002] Automatic revolving door systems, such as those used in building entrances, are generally designed with one or two movable door leaves. Depending on the application, a distinction is made between standard doors and fire doors, which must close reliably in the event of a power failure.

[0003] In electromechanical revolving door drives, the rotary motion of the drive shaft is generated by a motor and gearbox unit and transmitted directly to the door leaf, either via a roller lever or a scissor linkage. Standard doors open and close electrically in this way. Fire doors also open electrically, but close purely mechanically using energy stored in a mechanical energy storage device. During the opening process, the motor and gearbox unit actuates the energy storage device, which then releases its stored energy to close the door. This mechanical energy storage device is, for example, a spring that is tensioned when the door leaf is opened.In the event of an alarm or fire, the electromechanical drive is de-energized, and the movable door leaf, if the fire door is in the open position, closes immediately using the stored mechanical energy via the mechanical energy storage system. The closing torque of the door leaf is determined by the current spring tension and the various gear ratios within the system, ensuring reliable separation of the fire compartment from the protected area in the event of a fire. The closing torques for fire doors are specified in EN 1154 Table 1. However, it is possible that such a door system may be installed in a building area with particular wind or pressure conditions, meaning that despite compliance with the standard, the door may not close securely.

[0004] DE 101 48 293 A1 discloses a generic electromechanical drive for a revolving door with a motor for opening the door and a spring accumulator for closing the door. The motor acts against a spring force of the spring accumulator, whereby an opening or closing force acts via a drive spindle and a spindle nut on a piston with teeth which mesh with a pinion non-rotatably connected to an output shaft.

[0005] German patent DE 10 2006 002 751 A1 describes a swing door drive in which the door is closed by at least one compression spring and a motor can open and close the door. In the event of a complete power failure, the door closes solely by spring force.

[0006] In contrast, DE 10 2012 210 588 A1 describes an emergency power supply for an electric drive of an automatic revolving door system without a compression spring for the closing movement, which, in the event of a fire, can be connected to the emergency power supply via a switching device when de-energized. A changeover switch is not included.

[0007] From DE 37 09 688 A1 an automatic sliding door with locking system is known which has a battery in addition to a main voltage source.

[0008] The invention is based on the objective of providing an electromechanical drive with a motor and gearbox unit for opening the door and a spring storage unit for closing the door, which enables safe closing of the door regardless of the environmental conditions, as well as providing a fire door which closes safely.

[0009] This problem is solved by the features of the electromechanical drive according to claim 1 and by the features of a fire door according to claim 6.

[0010] Advantageous embodiments and further developments of the invention are specified in the dependent claims.

[0011] The electromechanical drive according to the invention comprises a motor and gearbox unit which assists the mechanical energy storage device during door closing and ensures the complete closure of the fire door. In an emergency operation, where the supply voltage to the motor and gearbox unit is switched off, an emergency power supply provides a backup voltage. Thus, the corresponding door can be closed reliably even against wind and negative pressure.

[0012] The motor and gearbox unit is operatively connected to the door leaf via a power transmission device and causes the door leaf to move. The power transmission device can be designed, for example, as a roller rail lever or a scissor linkage.

[0013] Furthermore, a fire door with at least one movable door leaf and an electromechanical drive for operating the movable door leaf is proposed.

[0014] In an advantageous embodiment of the electromechanical drive according to the invention, the mechanical energy storage device can be operatively connected to the door leaf via the power transmission device. This allows the closing force of the motor and gearbox unit to be easily coupled with the closing force of the mechanical energy storage device. Preferably, the mechanical energy storage device can be designed as a spring storage device with at least one spring element. This enables a simple and cost-effective implementation of the mechanical energy storage device. The at least one spring element can be tensioned by the opening movement of the door leaf and relaxed by the closing movement of the movable door leaf.

[0015] According to the invention, the emergency power supply comprises a changeover switch and an electrical energy storage device. The electrical energy storage device can, for example, be implemented as a rechargeable battery and / or as an electrolytic capacitor. The changeover switch comprises at least one relay contact which, in normal operation (i.e., when energized), connects the motor and gearbox unit to the supply voltage, and in emergency operation (i.e., when de-energized), connects it to the emergency supply voltage of the electrical energy storage device. This allows the switching between the supply voltage and the emergency supply voltage to advantageously occur independently of a specific control signal.

[0016] According to the invention, the control electronics monitor and operate the motor and gearbox unit depending on the current operating state and / or the current temperature of the motor and gearbox unit and / or the current direction of movement and / or the current speed and / or the current opening angle of the door leaf. Advantageously, the control electronics can operate the motor and gearbox unit to support the mechanical energy storage only when the stored mechanical energy is insufficient to close the door completely. Furthermore, the control electronics can monitor the charge level of the electrical energy storage unit and thereby ensure that the stored electrical energy is sufficient to operate the motor and gearbox unit. Additionally, the control electronics determine the current temperature of the motor and gearbox unit via a temperature sensor.Additionally or alternatively, the control electronics determine the current direction of movement and / or the current speed and / or the current opening angle of the door leaf via a rotary encoder, which, for example, monitors the rotational position of the drive shaft of the motor and gearbox unit, or a position sensor, which monitors the position of the door leaf.

[0017] An embodiment of the invention is explained in more detail below with reference to a graphic representation.

[0018] This shows: Fig. 1 A schematic block diagram of an embodiment of an electromechanical drive according to the invention for a fire door.

[0019] As from Fig. As can be seen in Figure 1, an electromechanical drive 10 for actuating a movable door leaf 60 in the illustrated embodiment comprises a motor and gearbox unit 30, which is operatively connected to the door leaf 60 via a power transmission device 50 and causes movement of the door leaf 60, and a mechanical energy storage device 40 for closing the door, which is charged during an opening movement of the door leaf 60 and discharged by a closing movement of the movable door leaf 60. According to the invention, the motor and gearbox unit 30 assists the mechanical energy storage device 40 during door closing and causes the door to close completely. In an emergency operation, in which a supply voltage U G when the motor and gearbox unit 30 is switched off, an emergency supply 70 of the motor and gearbox unit 30 provides an emergency supply voltage U N available.

[0020] As from Fig. As can be seen in Figure 1, the mechanical energy storage device 40 in the illustrated embodiment is operatively connected to the door leaf 60 via the power transmission device 50. Thus, the opening force Fo is generated by the motor and gearbox unit 30 and transmitted to the door leaf 60 via the power transmission device 50. Furthermore, a portion of the closing force Fs, shown with dashed lines, is generated by the mechanical energy storage device 40 and transmitted to the door leaf 60 via the power transmission device 50. In addition, the motor and gearbox unit 30 assists the mechanical energy storage device 40 and generates a further portion of the closing force Fs, shown with dashed lines, which is also transmitted to the door leaf 60 via the power transmission device 50. The mechanical energy storage device 40 is preferably designed as a spring storage device with at least one spring element.The power transmission device 50 can be designed, for example, as a roller rail lever or as a scissor linkage.

[0021] As from Fig. As can be seen further in Figure 1, the emergency power supply 70 comprises a changeover switch 72 and an electrical energy storage device 74. In the illustrated embodiment, the changeover switch 72 comprises at least one relay contact (not shown in detail) which, in normal operation, supplies the motor and gearbox unit 30 with the supply voltage U. G and in emergency operation with the emergency supply voltage U N of the electrical energy storage device 74 connects.

[0022] As from Fig.As can be seen further in Figure 1, a control electronics unit 20, which is arranged between the emergency power supply 70 and the motor and gearbox unit 30, monitors and operates the motor and gearbox unit 30 depending on the current operating state and / or the current temperature of the motor and gearbox unit 30 and / or the current direction of movement and / or the current speed and / or the current opening angle of the door leaf 60. In the illustrated embodiment, the control electronics unit 20 monitors the charge level of the electrical energy storage device 74 and determines the current temperature of the motor and gearbox unit 30 via a temperature sensor 32, which is arranged in the area of ​​the motor and gearbox unit 30.Furthermore, the control electronics 20 determine the current direction of movement and / or the current speed and / or the current opening angle of the door leaf 60 via a rotary encoder 34, which is coupled to the drive shaft of the motor and gearbox unit 30. Alternatively, the control electronics 20 can directly determine the current direction of movement and / or the current speed and / or the current opening angle of the door leaf 60 via a position sensor located in the area of ​​the door leaf 60. The closing process can be advantageously monitored by the control electronics 20. If necessary, the closing process can be assisted by the motor and gearbox unit 30 using the stored energy of the mechanical energy storage device 40.

[0023] Embodiments of the electromechanical drive 10 according to the invention are preferably used for fire doors in order to enable the safe closing of the fire doors regardless of the wind and / or pressure conditions. Reference symbol list 10 Drive 20 Control electronics 30 Motor and transmission unit 32 Temperature sensor 34 rotary encoders 40 mechanical energy storage devices 50 Power transmission device 60 door leaves 70 Emergency supplies 72 switches 74 electrical energy storage U G Supply voltage U N Emergency power supply F s Closing force F ö Opening force

Claims

[1] Electromechanical drive (10) for actuating a movable door leaf (60) of a fire door, comprising a motor and gearbox unit (30) which is operatively connected to the door leaf (60) via a power transmission device (50) and causes a movement of the door leaf (60), and a mechanical energy storage device (40) for closing the door, which is charged during an opening movement of the door leaf (60) and discharged by a closing movement of the movable door leaf (60), wherein the motor and gearbox unit (30) assists the mechanical energy storage device (40) during door closing and causes the door to close completely. where in an emergency operation in which a supply voltage (U G ) the motor and transmission unit (30) is switched off, an emergency supply (70) of the motor and transmission unit (30) an emergency supply voltage (U N) provides an emergency power supply (70) comprising a changeover switch (72) and an electrical energy storage device (74), wherein the changeover switch (72) comprises at least one relay contact which, in normal operation, supplies the motor and gearbox unit (30) with the supply voltage (U) G ) and in emergency operation, in which a supply voltage (U G ) the motor and transmission unit (30) is switched off, with the emergency supply voltage (U N ) of the electrical energy storage device (74) connects, characterized by , that a control electronics (20) monitors and operates the motor and transmission unit (30) depending on the current operating state and / or a current temperature of the motor and transmission unit (30) and / or a current direction of movement and / or a current speed and / or a current opening angle of the door leaf (60) and The control electronics (20) determine the current temperature of the motor and transmission unit (30) via a temperature sensor (32) and / or determine the current direction of movement and / or the current speed and / or the current opening angle of the door leaf (60) via a rotary encoder (34) or a position sensor. [2] Drive according to claim 1, characterized by , that the mechanical energy storage device (40) is in operative connection with the door leaf (60) via the power transmission device (50). [3] Drive according to claim 1 or 2, characterized by , that the mechanical energy storage device (40) is designed as a spring storage device with at least one spring element. [4] Drive according to any one of claims 1 to 3, characterized by , that the control electronics (20) monitors the charge level of the electrical energy storage device (74). [5] Drive according to any one of claims 1 to 4, characterized by, that the power transmission device (50) is designed as a roller rail lever or as a scissor linkage. [6] Fire door with at least one movable door leaf (60) and an electromechanical drive (10) for operating the movable door leaf (60), characterized by , that the electromechanical drive (10) is designed according to at least one of claims 1 to 5.

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