Device for securing a motor-operated door and drive device

Abstract

The present invention relates to a device for securing a motor-operated door, in particular a revolving door (11), comprising a first sensor (22) covering a first monitoring area (28) and a second sensor (24) covering a second monitoring area (30). The two sensors (22, 24) are mounted in a fixed position, preferably relative to a door lintel (13), and the two monitoring areas (28, 30) are designed such that, when installed, they together cover the movement area (32) of a door leaf (14) of the door (11) between an open position and a closed position. The invention further relates to a drive device comprising such a device for securing a motor-operated door.

Description

[0001] The present invention relates to a device for securing a motor-operated door, in particular a revolving door, and to a drive device with such a securing device.

[0002] When securing revolving doors, the sensors are currently mounted on the door leaf. These moving sensors have the advantage that the monitoring field is always within the danger zone and the sensor is not interfered with by the door leaf.

[0003] Although this solution has proven itself in practice, it does have certain disadvantages. For example, the sensor's monitoring range extends beyond the movement range of the leaf, which can lead to false detections. Handle bars that protrude into the sensor's monitoring range can also lead to false detections. Due to current technology, there is an unmonitored area of ​​approximately 20 cm between the sensor field and the door leaf. For security reasons, the position of the leaf must be known, which must be achieved either through a bus connection from the drive or through an additional sensor (e.g. gyroscope). Optical sensors can be disrupted by changes in the reflective properties of the surface. The sensors are mounted visibly on the leaf and cannot be integrated into the drive housing.A cable transition is necessary for supply and signal transmission, which increases installation time and is problematic for fire doors.

[0004] DE 10 2020 119 925 A1 discloses a security system for automatic swing doors in which multiple sensors – particularly laser scanners – are used to detect people in the area of ​​the main closing edge. The sensor technology generates multiple detection curtains and covers extended safety zones, especially during closing. Depending on the door position and movement, different curtain areas are activated. The sensors can be mounted on the door leaf or implemented in a modular master-slave architecture.

[0005] DE 10 2008 008 142 A1 concerns a control device for automatic doors with at least two sensor fields of different widths. Depending on the door size or operating mode (e.g., winter operation with reduced opening), the sensor fields are evaluated individually or jointly to detect cross traffic and prevent false openings. The sensors are usually radar sensors and can determine the direction of movement and the distance of objects.

[0006] The object of the present invention is therefore to enable reliable security for doors, especially revolving doors, without having to accept the disadvantages of previous solutions. In particular, the invention is intended to ensure seamless monitoring of the entire movement range of the door while simultaneously enabling simple and aesthetically pleasing integration of the sensors.

[0007] This object is achieved by a device for securing a motor-operated door with the features of claim 1. The device comprises a first sensor covering a first monitoring area and a second sensor covering a second monitoring area. The two sensors are mounted in a fixed location, preferably relative to a door lintel. The two monitoring areas are designed such that—when installed—they jointly cover the range of movement of a door leaf between the open and closed positions.

[0008] In other words, at least two sensors are provided, which are fixed in place, particularly to the door lintel, and therefore do not move with the door. The fixed mounting of the sensors means that the monitoring area of ​​the two sensors is static and does not move with the movement of the door leaf. The static monitoring area is only limited by the door leaf itself, which is covered. However, by using at least two sensors, this coverage of the monitoring areas does not lead to any impairments.

[0009] This device according to the invention has the advantage, among other things, that no cable transition from the drive to the sash is necessary, since the sensors are permanently installed. This leads to a reduction in installation time and increases aesthetic integration.

[0010] The problem is thus completely solved.

[0011] In a further development, a control device is provided to which sensor signals from the two sensors are supplied and which is designed to detect a person and / or an obstacle within at least one monitoring area on the basis of the sensor signals.

[0012] This training has the advantage of enabling precise detection and response to people in the surveillance area, which increases security.

[0013] Preferably, the control device evaluates the sensor signal from one of the two sensors depending on the direction of movement of the door leaf. This prevents false detections caused by movement of the door leaves within the monitoring area.

[0014] Preferably, the monitoring areas are arranged in such a way that they cover the movement area in front of the main closing edge (HSK) and the secondary closing edge (NSK), which enables seamless protection of the critical areas in order to avoid injuries to persons in the movement area of ​​the door leaf.

[0015] Preferably, the first monitoring area—when the door leaf is open—also covers an area on the opposite side of the door from the hinge. This solution enables more comprehensive security.

[0016] The sensors can preferably be ultrasonic sensors whose radiation angle is selected so that no evaluable reflection occurs from the door leaf back to the sensor.

[0017] In other words, the moving door leaf is not detected in the movement zone because no usable reflection signals are received. This reduces the signal evaluation in the control system because the reflection signals caused by the door leaf are not received.

[0018] Alternatively, the sensors can be optical, acoustic, and / or radar sensors. This makes it possible to adapt to different environmental conditions and requirements, thus ensuring greater flexibility and reliability.

[0019] Time of Flight (ToF) sensors can preferably be used as optical sensors and FMCW (Frequency Modulated Continuous Wave) radar sensors can be used as radar sensors in order to ensure high precision and reliability in the detection of persons and / or obstacles.

[0020] In a preferred embodiment, the control device comprises a detection device designed to detect the door leaf in the sensor signals. The detection device preferably has a unit designed to independently learn the signals originating from the door leaf and then filter them out during evaluation.

[0021] This solution makes it possible, for example, to detect and store a signal pattern generated by the door leaf in the form of one or more learning runs. During operation, the detection device can then compare the stored signal patterns with the generated signal patterns and filter out the signals generated by the door leaf. The advantage is that false detections can be avoided and safety improved.

[0022] In a preferred embodiment, a sensor can consist of various combinations of transmitters and receivers. For example, a sensor can have one transmitter and one receiver, multiple transmitters and one receiver, one transmitter and multiple receivers, or multiple transmitters and multiple receivers. This increases flexibility in sensor arrangement and optimizes detection.

[0023] In a preferred development, a third sensor can be provided which covers a third monitoring area, wherein the third monitoring area at least partially covers an area on the opposite side of the door from the hinge.

[0024] The advantage of this solution is extended security.

[0025] Preferably, a housing accommodates at least one of the sensors, which ensures protection of the sensors and improved integration into the door structure.

[0026] The object underlying the invention is also achieved by a drive device for the motor-assisted opening and / or closing of a leaf of a revolving door, comprising a housing that accommodates a drive motor and a safety device according to the invention, wherein the sensors are provided on or in the housing at a distance from one another. This solution enables a compact design and simple installation.

[0027] The housing can be elongated, with one of the two sensors provided at each of the longitudinal ends to ensure optimal placement of the sensors for complete coverage of the monitoring area.

[0028] Preferably, the drive is stopped or moved in the opposite direction when a person and / or obstacle is detected in a monitoring area.

[0029] This increases safety as the drive reacts immediately to detected persons and / or obstacles.

[0030] The present invention overcomes the described disadvantages of previous solutions and ensures efficient, easy-to-install, aesthetically pleasing and reliable security for revolving doors.

[0031] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

[0032] Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings. These show: Fig. 1 a schematic representation of a revolving door system; Fig. 2a another illustration of the revolving door system from Fig. 1; Fig. 2b the revolving door system of Fig. 2a with graphically displayed monitoring areas of the two sensors; Fig. 3 a schematic representation of a surveillance situation; Fig. 4 a schematic representation of another monitoring situation; Fig. 5 a schematic representation of the movement area of ​​the door and the monitoring areas of the sensors in plan view; Fig. 6 a schematic representation of the monitoring situation when the door opens; Fig. 7 a schematic representation of the monitoring situation when the door is closing; Fig. 8 a schematic representation of a revolving door system with an additional sensor and the associated monitoring areas; and Fig. 9 a schematic representation of a revolving door system with an additional sensor on the opposite hinge side.

[0033] The following describes a revolving door drive using an exemplary embodiment. Such a revolving door drive consists of several components that work together to ensure the smooth and automatic movement of a revolving door leaf. The main components include an electric motor, a control unit, power transmission elements, and sensors.

[0034] The drive is powered by an electric motor, which provides the necessary energy to move the revolving door leaf. The electric motor is housed in a housing, usually mounted on the door frame above the door leaf. The control unit processes signals from various sensors and control units and transmits commands to the electric motor. The control unit regulates, for example, the speed, opening and closing cycles, and safety functions of the revolving door.

[0035] The power transmission elements, especially for transmitting torque, include mechanical components such as gears, joints, and arms that transmit the rotary motion of the electric motor to the door leaf of the revolving door. These elements ensure that the motor's power is distributed evenly and efficiently across the door leaf.

[0036] Sensors are designed to ensure that the door leaf only moves when it is safe to do so. These include presence detectors, safety sensors, security sensors, or general sensors that detect people or obstacles near the door leaf, especially within the door leaf's movement range (regardless of whether the person / obstacle is moving or not), and immediately stop or reverse the motor.

[0037] During operation, the drive receives a signal from a manual control device (e.g., a button or remote control). The control unit processes this signal and activates the electric motor, which sets the door leaf in motion via the power transmission elements. During movement, the sensors continuously monitor the area around the door leaf to ensure that there are no obstacles in the way. As soon as the door leaf reaches the desired position (fully open or closed), the motor stops automatically. However, if the sensors detect a person or an obstacle in the door leaf's range of motion, the motor is immediately stopped or reversed.

[0038] In Fig. Figure 1 schematically shows such a revolving door drive 10 for a door leaf 14 of a revolving door 11. The revolving door drive 10 has a housing 16 that accommodates the components required for the drive. Outside the housing 16, an arm 18 is provided as one of the power transmission elements. This arm 18 is connected to the door leaf 14 and serves to open and / or close the door leaf 14 via the drive.

[0039] In the present embodiment, the housing 16 is attached to a door frame 12 or a door lintel / wall 13, so that the housing 16 is stationary relative to the door leaf 14.

[0040] Two sensors 22, 24 are provided in or on the housing 16. Fig. 1 that the two sensors 22, 24 are provided on the underside of the housing 16, and thus directed towards the door leaf 14. Preferably, the two sensors 22, 24 are located at the two longitudinal ends of the housing 16. Of course, it would also be conceivable to provide the two sensors 22, 24 outside the housing 16, wherein the arrangement of the sensors should preferably be such that one of the two sensors, here sensor 22, is arranged in the area of ​​the secondary closing edge (NSK) and the other sensor, here sensor 24, is arranged in the area of ​​the main closing edge (HSK). In the present exemplary embodiment, the secondary closing edge is on the left and the main closing edge is on the right, since a door hinge 15 is provided on the left side of the door frame.

[0041] Different types of sensors can be used, but they all have in common that they emit sensor beams 26. The sensor beams 26 can define a planar (two-dimensional) monitoring area or a spatial (three-dimensional) monitoring area. Optical or acoustic sensors, or even radar sensors, can be used as sensors 22, 24. Examples of optical sensors include time-on-flight sensors, acoustic sensors include ultrasonic sensors, and radar sensors include FMCW sensors.

[0042] Each of the sensors 22, 24 may comprise one transmitter and one receiver, multiple transmitters and one receiver, one transmitter and multiple receivers, or multiple transmitters and multiple receivers.

[0043] In Fig. Figure 2a shows the revolving door drive 10 from a different perspective, schematically showing that the sensor 22 is a structural unit that can be inserted into the housing 16 from below. In other words, the control unit within the housing 16 can be designed such that the sensor can be installed and removed as a unit through an opening in the housing 16. This would make it easy to expand the revolving door drive 10 with sensors or to replace existing sensors with others.

[0044] In Fig. 2a also shows that a door hinge 15 is provided on the left side of the door frame 12, so that the secondary closing edge is on the left side and the primary closing edge is on the right side of the door frame. The door leaf 14 therefore opens forward, out of the plane of the drawing.

[0045] In Fig. 2b it can also be seen that the sensor 22 spans a monitoring area 28 in the area of ​​the secondary closing edge, while the sensor 24 spans a monitoring area 30 in the area of ​​the main closing edge.

[0046] in Fig. Figure 5 schematically shows the two monitoring areas 28, 30 of the sensors 22, 24 in a plan view, along with the movement area 32 of the door leaf 14. It can be clearly seen that the two monitoring areas 28, 30 preferably completely cover the movement area 32 of the door leaf 14. In other words, this means that at least one of the two sensors 22, 24 can detect an obstacle in the movement area of ​​the door leaf 14. However, it should be noted at this point that the door leaf 14 covers part of the monitoring area 28, 30 of each sensor when opening or closing. However, since two sensors 22, 24 are provided that are arranged at a distance from one another, it is ensured at all times during the opening or closing of the door leaf 14 that at least the immediate area in front of or behind the door leaf is monitored.

[0047] In Fig. Figure 5 also schematically shows a third monitoring area 31 located on the rear side of the door leaf. This monitoring area 31 is preferably covered or generated by the second sensor 24, which, so to speak, looks through the revolving door 11 or the door opening.

[0048] The problem with using stationary sensors 22, 24 is that the door leaf 14 passes through the two monitoring areas 28, 30 when opening or closing. In other words, the door leaf 14 can be detected as an obstacle by the respective sensor 22, 24.

[0049] This problem can be solved in several ways. If acoustic sensors, such as ultrasonic sensors, are used, they can be aligned so that the door leaf 14 does not reflect any radiation back to the sensor's receiver. Consequently, the door leaf 14 is not visible to the control unit in this case.

[0050] If other types of sensors are used, the control unit must filter the signals originating from or generated by the door leaf 14. There are various options for this. With the help of a self-learning system, the reflection signals generated by the door leaf can be recorded, for example, in one or more passes and recognized accordingly as "door leaf signals" and stored, for example, as a pattern. It would also be conceivable to detect the signal specifically generated by the door leaf 14 through precise position detection and / or rotation angle detection of the door leaf and then calculate it.

[0051] In Fig. Figure 3 shows a monitoring situation in which a person 40 is standing in the monitoring area 28 and in the monitoring area 30. The door leaf 14 is open, for example, approximately 70° here and covers the respective monitoring areas of the two sensors 22, 24 accordingly. If the door leaf 14 opens in this monitoring situation, the monitoring area 28 of the sensor 22 is relevant for detecting a person or an obstacle in the movement area of ​​the door leaf. If, however, the door leaf 14 closes, the monitoring area 30 of the sensor 24 is relevant for detecting a person 40 or an obstacle in the movement area. In such a monitoring situation, it would therefore be conceivable to evaluate only the signals from sensor 22 when the door leaf 14 opens and only the signals from sensor 24 when the door leaf closes.

[0052] In Fig. Figure 4 shows another surveillance situation from a different perspective. Here, two people 40 are standing in the area of ​​the door leaf 14, with one person 40 on the hinge side (right side) of the door leaf 14 and the other person 40 on the opposite side. Both people 40 are detected by the sensor 24, and it is clearly visible here that the surveillance area 30 can see through the revolving door. Fig. 5, this monitoring area is marked with the reference number 31.

[0053] In Fig. Figure 4 schematically shows that the housing 16 of the revolving door drive 10 accommodates the control unit, which in the present embodiment comprises a control device 34 and a detection device 36. The detection device 36 is provided for controlling the sensors 22, 24 and evaluating the received signals. Furthermore, the electric motor 38 is also provided in the housing 16.

[0054] As already indicated, the two sensors 22, 24 can be used selectively, ie individually, or together for monitoring. If the door leaf 14 is opened, as for example in Fig. 6, it is conceivable to use only the sensor 22 for monitoring, while the other sensor 24 does not provide any signals or the detection device 36 does not evaluate the signals.

[0055] If, however, the door leaf 14 is closed, as for example in Fig. 7, it is conceivable to use only the sensor 24, while the sensor 22 does not provide any signals or the detection device 36 does not evaluate the signals.

[0056] In order to enlarge the monitoring area 31 on the opposite side of the hinge or to improve the detection quality in this area, for example, a further sensor 42 can be provided on the opposite side of the door frame 12, as shown in Fig. 9. For this purpose, a housing 44 is mounted on the door frame, housing the sensor 42 with the corresponding necessary electronics. The signals from the sensor 42 are transmitted wired or wirelessly to the detection device 36 of the control device 34 on the hinge side. The sensor 42 can also be an optical or acoustic sensor or a radar sensor. It is preferably of the same type as the sensors 22, 24.

[0057] In Fig. Figure 8 shows a schematic representation of the two monitoring areas 28, 30 of the two sensors 22, 24, as well as the additional monitoring area 46 of the sensor 42. It can be seen that the three monitoring areas 28, 30, 46 partially overlap and can cover a significantly larger area overall. The larger overlap areas can increase the detection quality because the detection device can evaluate multiple signals.

[0058] In an alternative arrangement not shown in the figures, the drive 10 could be provided on the opposite side of the belt instead of on the belt side. In this case, the two sensors 22, 24 would be provided in a separate housing, separate from the housing 16 of the drive 10 on the belt side. If the third sensor 42 is provided, it can then be housed in the housing 16 of the drive 10, so that no separate housing is required for it.

[0059] Overall, it can be seen that the provision of at least two stationary sensors on the hinge side of a revolving door provides a simple way to secure the revolving door. The door leaf's movement area is completely monitored, so that people or obstacles within this movement area can be reliably detected. This solution therefore avoids the need to mount sensors directly on the door leaf, which usually requires sensors on both sides of the door leaf. The design and installation of the device according to the invention is therefore significantly simpler than previous solutions. List of reference symbols: 10 Door drive 11 revolving door 12 door frames; 13 Wall, door lintel 14 door leaves 15 Door hinge 16 housings 18 arms 20 slide rail 22 Sensor 24 sensors 26 Radiation Sensor 28 Surveillance Area 1 30 Surveillance Area 2 31 Surveillance Area 3 32 Door movement area 34 Control device 36 Detection device 38 electric motor 40 people 42 Sensor 3 44 housings 46 Surveillance Area 3

Claims

[1] Device for securing a motor-operated door, in particular a revolving door (11), with a first sensor (22) covering a first monitoring area (28), and a second sensor (24) which covers a second monitoring area (30), wherein the two sensors (22, 24) are mounted in a stationary manner, preferably to a door lintel (13), and the two monitoring areas (28, 30) are designed such that - in the installed state - they together cover the movement area (32) of a door leaf (14) of the door (11) between an open position and a closed position. [2] Device according to claim 1, comprising a control device (34) to which sensor signals from the two sensors are supplied and which is designed to detect a person (40) and / or an obstacle within at least one monitoring area (28, 30) on the basis of the sensor signals. [3] Device according to claim 2, wherein the control device evaluates the sensor signal of only one of the two sensors depending on the direction of movement of the door leaf (14). [4] Device according to claim 1, 2 or 3, wherein the second monitoring area (30) is arranged such that it covers at least the movement area in front of the main closing edge (HSK), and the first monitoring area (28) is arranged such that it covers the movement area in front of the secondary closing edge (NSK). [5] Device according to claim 4, wherein the first monitoring area (28) - when the door leaf (14) is open - also covers an area (31) on a side opposite the hinge of the door (11). [6] Device according to one of the preceding claims, wherein the sensors (22, 24) comprise ultrasonic sensors whose radiation angle is selected such that the ultrasonic signals impinge on the door leaf at an angle, so that no evaluable reflection occurs from the door leaf (14) back to the ultrasonic sensor. [7] Device according to one of claims 1 to 5, wherein the sensors (22, 24) comprise optical sensors, acoustic sensors and / or radar sensors. [8] Device according to claim 7, wherein the optical sensors are Time of Flight (ToF) sensors, and / or the radar sensors are FMCW (Frequency Modulated Continued Wave) sensors. [9] Device according to one of claims 2 to 8, wherein the control device (34) has a detection device (36) which is designed to detect the door leaf (14) in the respective sensor signals of the sensors (22, 24). [10] Device according to claim 9, wherein the detection device (36) comprises a unit which is designed to independently learn the signals originating from the door leaf (14) and then to filter them out during the evaluation. [11] Device according to one of the preceding claims, wherein a sensor (22, 24) comprises a transmitter and a receiver, a plurality of transmitters and a receiver, a transmitter and a plurality of receivers or a plurality of transmitters and a plurality of receivers. [12] Device according to one of the preceding claims, comprising a third sensor (42) which covers a third monitoring area (31), wherein the third monitoring area (31) at least partially covers an area on the opposite side of the door (11) from the hinge. [13] Device according to one of the preceding claims, comprising a housing (16, 44) which accommodates at least one of the sensors (22, 24, 42). [14] Drive device for the motor-assisted opening and / or closing of a door leaf (14) of a door (11), in particular a revolving door, with a housing (16) which accommodates a drive motor, and a device for securing according to one of claims 1 to 13, wherein the sensors (22, 24) are provided on the housing (16) at a distance from one another. [15] Drive device according to claim 14, wherein the housing (16) is an elongated housing, at each of the longitudinal ends of which one of the two sensors (22, 24) is provided. [16] Drive device according to claim 14 or 15, wherein the drive is stopped or moved in the opposite direction when a person is detected in a monitoring area (28, 30, 31).

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