Device for securing a motor-driven 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), wherein the two sensors (22, 24) are fixedly mounted, 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 range of movement (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 with 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 device for securing.

[0002] Currently, sensors for securing revolving doors are 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 obstructed by the door leaf.

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

[0004] The object of the present invention is therefore to enable reliable door security, particularly for revolving doors, without having to accept the disadvantages of existing solutions. The invention is intended, in particular, to ensure seamless monitoring of the entire movement range of the door while simultaneously enabling simple and aesthetically pleasing integration of the sensors.

[0005] This problem is solved 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, wherein the two sensors are fixedly mounted, preferably to a door head. The two monitoring areas are designed such that, in the installed state, they together cover the range of motion of one door leaf between the open and closed positions.

[0006] In other words, at least two sensors are provided, which are fixed in place, specifically on the door lintel, and therefore do not move with the door. Because the sensors are fixed in place, their monitoring area is static and does not move with the door leaf. The static monitoring area is only limited by the door leaf itself, which covers it. However, because at least two sensors are used, this covering of the monitoring areas does not impair the system's effectiveness.

[0007] This device according to the invention has, among other advantages, that no cable connection from the drive to the wing is necessary, since the sensors are permanently installed. This leads to a reduction in assembly time and improves aesthetic integration.

[0008] The task is thus completely solved.

[0009] In a training course, a control device is provided to which sensor signals from the two sensors are fed and which is designed to detect a person and / or an obstacle within at least one monitoring area based on the sensor signals.

[0010] This training has the advantage of enabling precise detection and response to people in the monitored area, which increases security.

[0011] Preferably, the control unit 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 movements of the door leaves within the monitoring area.

[0012] Preferably, the monitoring areas are arranged to 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 to prevent injuries to persons in the movement area of ​​the door leaf.

[0013] Preferably, the first monitoring area – when the door leaf is open – also covers an area on the opposite side of the door from the hinges. This solution allows for more comprehensive security.

[0014] The sensors can preferably be ultrasonic sensors whose beam angle is chosen so that no evaluable reflection from the door leaf back to the sensor occurs.

[0015] In other words, the moving door leaf is not detected within its range of motion because no usable reflection signals are received. This reduces the signal processing in the control unit, as the reflection signals caused by the door leaf are not received.

[0016] 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.

[0017] Preferably, Time of Flight (ToF) sensors can be used as optical sensors and FMCW radar sensors (Frequency Modulated Continuous Wave) as radar sensors to ensure high precision and reliability in the detection of people and / or obstacles.

[0018] In a preferred embodiment, the control device comprises a detection device designed to recognize the door leaf in the sensor signals. Preferably, the detection device includes a unit designed to independently learn the signals originating from the door leaf and then filter them out during evaluation.

[0019] This solution makes it possible, for example, to recognize and store a signal pattern generated by the door leaf through one or more training cycles. During operation, the detection device can then compare the stored signal patterns with the generated signal patterns and filter out the signals caused by the door leaf. The advantage lies in the fact that false detections can be avoided and safety improved.

[0020] In a preferred further development, a sensor can consist of various combinations of transmitters and receivers. For example, a sensor can have one transmitter and one receiver, several transmitters and one receiver, one transmitter and several receivers, or several transmitters and several receivers. This increases flexibility in sensor arrangement and optimizes detection.

[0021] In a preferred further development, a third sensor may be provided which covers a third monitoring area, wherein the third monitoring area at least partially covers an area on the hinge-side of the door.

[0022] The advantage of this solution lies in enhanced security.

[0023] Preferably, a housing accommodates at least one of the sensors, which ensures the protection of the sensors and improved integration into the door structure.

[0024] The problem underlying the invention is also solved by a drive device for the motor-assisted opening and / or closing of a revolving door leaf, comprising a housing that accommodates a drive motor and a safety device according to the invention, wherein the sensors are provided spaced apart from each other on or in the housing. This solution enables a compact design and easy installation.

[0025] The housing can be elongated, with one of the two sensors provided at each of the longitudinal ends to ensure optimal sensor placement for complete coverage of the monitored area.

[0026] Preferably, the drive is stopped or moved in the opposite direction if a person and / or obstacle is detected in a monitoring area.

[0027] This increases safety by allowing the drive to react immediately to detected people and / or obstacles.

[0028] The present invention overcomes the disadvantages of previous solutions and ensures efficient, easy-to-install, aesthetically pleasing and reliable security for revolving doors.

[0029] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0030] Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings. These show: Figure 1 is a schematic representation of a revolving door system; Figure 2 is another representation of the revolving door system made of Fig. 1 Figure 2b, the revolving door system of Figure 2awith graphically represented monitoring areas of the two sensors; Figure 3 a schematic representation of a monitoring situation; Figure 4 a schematic representation of another monitoring situation; Figure 5 a schematic representation of the movement range of the door and the monitoring areas of the sensors in top view; Figure 6 a schematic representation of the monitoring situation when the door is opening; Figure 7 a schematic representation of the monitoring situation when the door is closing; Figure 8 a schematic representation of a revolving door system with an additional sensor and the associated monitoring areas; and Figure 9 a schematic representation of a revolving door system with an additional sensor on the opposite side of the hinge.

[0031] The following describes, using an exemplary embodiment, a revolving door drive for a revolving door. Such a drive essentially 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.

[0032] The drive is powered by an electric motor that supplies the necessary energy to move the revolving door leaf. The electric motor is housed in a casing, which is typically mounted above the door leaf on the door frame. The control unit processes signals from various sensors and control devices and sends commands to the electric motor. The control unit regulates, for example, the speed, opening and closing cycles, and safety functions of the revolving door.

[0033] The power transmission elements, particularly for transmitting torque, include mechanical components such as gears, joints, and arms that transfer 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.

[0034] The sensors are designed to ensure that the door leaf only moves when it is safe to do so. These include presence detectors, safety sensors, safeguarding sensors, or generally sensors that detect people or obstacles near the door leaf, especially within the door leaf's range of motion (regardless of whether the person / obstacle is moving or not), and immediately stop or reverse the motor.

[0035] During operation, the drive receives a signal from a manual control unit (for example, 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, sensors continuously monitor the area around the door leaf to ensure there are no obstacles. As soon as the door leaf reaches the desired position (fully open or closed), the motor stops automatically. However, if a person or obstacle is detected by the sensors within the door leaf's range of motion, the motor is immediately stopped or reversed.

[0036] In Figure 1A schematic diagram of such a revolving door drive 10 for a door leaf 14 of a revolving door 11 is shown. The revolving door drive 10 has a housing 16 that contains the components required for the drive. Outside the housing 16, an arm 18 is provided as one of the force transmission elements, which is connected to the door leaf 14 and serves to open and / or close the door leaf 14 via the drive.

[0037] 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 fixed in position relative to the door leaf 14.

[0038] Two sensors 22, 24 are provided in or on the housing 16. Figure 1It is evident that the two sensors 22, 24 are located on the underside of the housing 16, and thus facing 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, in which case the arrangement of the sensors should preferably be such that one of the two sensors, here sensor 22, is located in the area of ​​the secondary closing edge (LSE) and the other sensor, here sensor 24, is located in the area of ​​the primary closing edge (PCE). In the present embodiment, the secondary closing edge is on the left and the primary closing edge is on the right, since a door hinge 15 is provided on the left side of the door frame.

[0039] Various types of sensors can be used, but they all have in common that they emit sensor beams 26. These sensor beams 26 can define a two-dimensional (planar) or three-dimensional (spatial) monitoring area. For example, optical or acoustic sensors, or 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.

[0040] Each of the sensors 22, 24 can have one transmitter and one receiver, several transmitters and one receiver, one transmitter and several receivers or several transmitters and several receivers.

[0041] In Figure 2aThe revolving door drive 10 is shown from a different perspective, schematically illustrating that the sensor 22 is a unit that can be inserted into the housing 16 from below. In other words, the control unit inside the housing 16 can be designed so that the sensor can be installed and removed as a single unit through an opening in the housing 16. This would make it easy to expand the revolving door drive 10 with additional sensors or to replace existing sensors.

[0042] In Figure 2a It can still be seen that a 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 main 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.

[0043] In Figure 2bIt can still be seen that the sensor 22 covers a monitoring area 28 in the area of ​​the secondary closing edge, while the sensor 24 covers a monitoring area 30 in the area of ​​the main closing edge.

[0044] in Figure 5The two monitoring areas 28, 30 of the sensors 22, 24 are shown schematically in a top view, along with the movement area 32 of the door leaf 14. It is clearly evident that the two monitoring areas 28, 30 preferably cover the movement area 32 of the door leaf 14 completely. In other words, 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 that the door leaf 14 covers part of the monitoring area 28, 30 of each sensor when opening or closing. Since two sensors 22, 24 are arranged at a distance from each other, 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.

[0045] In Figure 5A third monitoring area 31, located on the back of the door leaf, is shown schematically. This monitoring area 31 is preferably covered or created by the second sensor 24, which, so to speak, looks through the revolving door 11 or the door opening.

[0046] The problem with using stationary sensors 22, 24 is that the door leaf 14 passes through both 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.

[0047] This problem can be solved in various ways. If acoustic sensors, e.g., 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, in this case, the door leaf 14 is not visible to the control unit at all.

[0048] If other types of sensors are used, the control unit must filter the signals originating from or generated by door leaf 14. There are various ways to do this. For example, a self-learning system can capture the reflection signals generated by the door leaf in one or more passes and recognize them as "door leaf signals," storing them, for instance, as a pattern. Alternatively, the signal specifically generated by door leaf 14 could be detected via precise position and / or rotation angle measurement of the door leaf and then filtered out.

[0049] In Figure 3Figure 1 shows a monitoring scenario in which a person 40 is located in monitoring area 28 and another in monitoring area 30. Door leaf 14 is open at approximately 70° and covers the respective monitoring areas of sensors 22 and 24. In this scenario, if door leaf 14 opens, monitoring area 28 of sensor 22 is relevant for detecting a person or obstacle within the door leaf's movement range. Conversely, if door leaf 14 closes, monitoring area 30 of sensor 24 becomes relevant for detecting a person 40 or an obstacle within its movement range. Therefore, in such a monitoring scenario, it would be conceivable to evaluate only the signals from sensor 22 when door leaf 14 opens and only the signals from sensor 24 when door leaf 14 closes.

[0050] In Figure 4Another monitoring situation is shown 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 that the monitoring area 30 can see through the revolving door. Figure 5 This monitoring area is marked with reference number 31.

[0051] In Figure 4 The schematic representation shows that the housing 16 of the revolving door drive 10 accommodates the control unit, which in this embodiment comprises a control device 34 and a detection device 36. The detection device 36 is designed to control the sensors 22, 24 and to evaluate the received signals. The electric motor 38 is also provided in the housing 16.

[0052] As previously indicated, the two sensors 22, 24 can be used selectively, i.e., individually, or together for monitoring. If the door leaf 14 is opened, as for example in Figure 6 As shown, it is conceivable to use only sensor 22 for monitoring, while the other sensor 24 does not provide any signals or the detection device 36 does not evaluate the signals.

[0053] If, on the other hand, the door leaf 14 is closed, as for example in Figure 7 As shown, it is conceivable to use only sensor 24, while sensor 22 does not provide any signals or the detection device 36 does not evaluate the signals.

[0054] To enlarge the monitoring area 31 on the opposite side of the hinge or to improve the detection quality in this area, for example, another sensor 42 can be provided on the opposite side of the hinge on the door frame 12, as shown in Figure 9As shown, a housing 44 is attached to the door frame, in which the sensor 42 with the necessary electronics is housed. The signals from the sensor 42 are transmitted wired or wirelessly to the detection device 36 of the control device 34 on the belt side. The sensor 42 can also be an optical or acoustic sensor or a radar sensor. Preferably, it is of the same type as the sensors 22, 24.

[0055] In Figure 8 The schematic diagram shows the two monitoring areas 28 and 30 of the two sensors 22 and 24, as well as the additional monitoring area 46 of sensor 42. It is evident that the three monitoring areas 28, 30, and 46 partially overlap and can cover a significantly larger area overall. The larger overlapping areas can improve detection accuracy, as the detection device can evaluate multiple signals.

[0056] In an alternative arrangement, not shown in the figures, the drive 10 could be located on the opposite side of the belt instead of on the belt side. In this case, the two sensors 22, 24 would be housed in a separate, independent enclosure, 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 within the housing 16 of the drive 10, thus eliminating the need for a separate enclosure for it.

[0057] Overall, it is evident that providing at least two fixed sensors on the hinge side of a revolving door offers a simple way to secure the door. The entire range of motion of the door leaf is monitored, ensuring that people or obstacles within this range are reliably detected. This solution therefore avoids the need to attach sensors directly to the door leaf, where sensors are typically required on both sides. Consequently, the design and installation of the device according to the invention is significantly simpler than previous solutions.

[0058] The following discloses various combinations of features of the invention in the form of clauses that adopt the style of patent claims. These clauses serve to clarify possible embodiments of the invention and represent different technical variants and combinations. They belong to the description and are not to be equated with the fully formulated patent claims. The combinations of features described below can be implemented individually or in any technically meaningful combination. Clause 1. 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), wherein the two sensors (22, 24) are fixedly mounted, 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 range (32) of a door leaf (14) of the door (11) between an open position and a closed position. Clause 2. Device according to Clause 1, comprising a control unit (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) based on the sensor signals. Clause 3.Device according to clause 2, wherein the control unit evaluates the sensor signal of only one of the two sensors depending on the direction of movement of the door leaf. Clause 4. Device according to clause 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 (MSE), and the first monitoring area (28) is arranged such that it covers the movement area in front of the secondary closing edge (SLE). Clause 5. Device according to clause 4, wherein the first monitoring area (28) – when the door leaf is open – also covers an area (31) on a hinge-side of the door (11). Clause 6. Device according to any of the preceding clauses, wherein the sensors (22, 24) are ultrasonic sensors whose beam angle is selected such that the ultrasonic signals strike the door leaf obliquely, so that no evaluable reflection occurs from the door leaf (14) back to the ultrasonic sensor. Clause 7.Device according to any one of clauses 1 to 5, wherein the sensors comprise optical sensors, acoustic sensors, and / or radar sensors. Clause 8. Device according to clause 7, wherein the optical sensors are Time-of-Flight (ToF) sensors, and / or the radar sensors are Frequency-Modulated Continued Wave (FMCW) sensors. Clause 9. Device according to any one of the preceding clauses, wherein the control device (34) comprises a detection device (36) designed to detect the door leaf in the respective sensor signals of the sensors (22, 24). Clause 10. Device according to clause 9, wherein the detection device (36) comprises a unit designed to autonomously learn the signals originating from the door leaf and then filter them out during evaluation.Clause 11: Device according to any of the preceding clauses, wherein a sensor (22, 24) comprises a transmitter and a receiver, multiple transmitters and a receiver, a transmitter and multiple receivers, or multiple transmitters and multiple receivers. Clause 12: Device according to any of the preceding clauses, comprising a third sensor (42) covering a third monitoring area (31), wherein the third monitoring area (31) at least partially covers an area on the hinge-side of the door (11). Clause 13: Device according to any of the preceding clauses, comprising a housing (16, 44) that accommodates at least one of the sensors (22, 24, 42). Clause 14:Drive device for motor-assisted opening and / or closing of a door leaf (14) of a door (11), in particular a revolving door, comprising a housing (16) that accommodates a drive motor, and a safety device according to any one of claims 1 to 13, wherein the sensors (22, 24) are spaced apart from each other on the housing (16). Clause 15. Drive device according to clause 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. Clause 16. Drive device according to clause 13 or 14, wherein the drive is stopped or moved in the opposite direction when a person is detected in a monitoring area (28, 30, 31). Reference symbol list:

[0059] 10 Door drive 11 Revolving door 12 Door frame; 13 Wall, door lintel 14 Door leaf 15 Door hinge 16 Housing 18 Arm 20 Guide rail 22 Sensor 24 Sensor 26 Radiation sensor 28 Monitoring area 1 30 Monitoring area 2 31 Monitoring area 3 32 Door movement area 34 Control device 36 Detection device 38 Electric motor 40 Person 42 Sensor 3 44 Housing 46 Monitoring area 3

Claims

1. 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), wherein the two sensors (22, 24) are fixedly mounted, 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 range (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 unit (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.

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 is open - also covers an area (31) on a hinge-side of the door (11).

6. Device according to one of the preceding claims, wherein the sensors (22, 24) are ultrasonic sensors whose beam angle is selected such that the ultrasonic signals strike the door leaf obliquely, so that no evaluable reflection from the door leaf (14) back to the ultrasonic sensor occurs.

7. Device according to any one of claims 1 to 5, wherein the sensors comprise optical sensors, acoustic sensors and / or radar sensors, wherein preferably the optical sensors are Time of Flight (ToF) sensors, and / or the radar sensors are FMCW (Frequency Modulated Continued Wave) sensors.

8. Device according to one of the preceding claims, wherein the control device (34) has a detection device (36) designed to detect the door leaf in the respective sensor signals of the sensors (22, 24).

9. Device according to claim 8, wherein the detection device (36) comprises a unit designed to independently learn the signals originating from the door leaf and then filter them out during evaluation.

10. Device according to one of the preceding claims, wherein a sensor (22, 24) comprises a transmitter and a receiver, several transmitters and a receiver, a transmitter and several receivers or several transmitters and several receivers.

11. Device according to one of the preceding claims, comprising a third sensor (42) covering a third monitoring area (31), wherein the third monitoring area (31) at least partially covers an area on the hinge side of the door (11).

12. Device according to one of the preceding claims, comprising a housing (16, 44) that accommodates at least one of the sensors (22, 24, 42).

13. Drive device for motor-assisted opening and / or closing of a door leaf (14) of a door (11), in particular a revolving door, comprising a housing (16) which accommodates a drive motor, and a device for safeguarding according to one of claims 1 to 13, wherein the sensors (22, 24) are provided spaced apart from each other on the housing (16).

14. Drive device according to claim 13, wherein the housing (16) is an elongated housing, at the longitudinal ends of which one of the two sensors (22, 24) is provided.

15. Drive device according to claim 12 or 13, 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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