DE20309093U1 - Method for safely operating a vertically sliding door, has transmitting and receiving units and a position sensor incorporated into the door lower edge buffer - Google Patents

Abstract

The door (3) has a rubber buffer (4) at the lower edge containing a transmitter (5), receiver (6) and a position sensor (10) connected by a spiral cable (7) to an electronic control unit (8). A closed position switch (9) registers the rest position.

Description

Patent Attorney

Dipl.-Phys. Cordula Knefel

Wertherstrasse 16, 35578 Wetzlar

PO Box 1924, 35529 Wetzlar

Telephone 06441/46330 - Fax 06441/48256

F G 1111

FEIG ELECTRONIC GmbH

Lange Strasse 4 35781 Weilburg-Waldhausen

Device for controlling the closing process

of essentially translationally driven door curtains or door leaves of a gate

Description

The invention relates to a device for controlling the closing process of essentially translationally driven door curtains or door leaves of a gate.

Due to safety regulations, there is a safety strip on the closing edge of gates, especially so-called high-speed gates. These safety strips are usually made of a rubber profile and can work according to different functional principles.

According to the state of the art (DE 196 36 347 C2), an optoelectronic device with a

a transmitter module and a receiver module. According to this state of the art, an integrated light barrier is arranged in the safety strip. The pulsed light beam emitted by the light transmitter runs inside the elastomer hollow profile, is picked up by the light receiver and evaluated by the switching module. When the elastomer hollow profile is compressed, the light beam is interrupted, which is detected by the light barrier system and triggers a braking impulse. This means that the slightest change in cross-section or deformation of the elastomer hollow profile causes the door movement to brake immediately. If there is an obstacle in the door area, the door brakes immediately.

Other possible functional principles are switching or pneumatic, i.e. functional principles that operate as "pressure wave switches ^11" .

The state-of-the-art principles have in common that a line is provided from the safety edge to the gate control so that the signals from the safety edge can be evaluated there.

In addition, each gate has a device with which the position of the gate or the end positions of the gate can be determined.

According to the state of the art (DE 295 09 517 Ul), limit switches are used as position sensors. These are located on the drive, for example the gear box, motor or door shaft of the door. These limit switches are set when the door is put into operation and are then no longer used.

changed. The disadvantage of adjusting the limit switches is that it is relatively complex.

In other applications, incremental encoders or absolute encoders are used, which are also located on the gate drive.

However, the position sensors used in accordance with the state of the art have the disadvantage that they cannot automatically react to changes in the door leaf or door curtain because they do not know the actual position of the closing edge of the door. Changes in the door curtain can be observed particularly in foil doors due to ageing or thermal influences. It can happen that the curtain of a new door has stretched after a few weeks and that the door then closes too far, or that the door remains open a few millimeters on cold days because the door curtain has shortened.

The technical problem underlying the invention is to provide a gate control in which the assembly and wiring effort on the gate is minimized and with which the absolute position of the gate can be determined at the same time.

This technical problem is solved by a device for controlling a gate with the features according to claim 1.

Because a position sensor is arranged in or on the safety bar of the gate according to the device according to the invention, it is possible to determine the absolute position of the gate via the position sensor.

and at the same time to minimize the installation and wiring effort on the gate.

According to the invention, the device for controlling the closing process is understood to mean the entire device with the device for closing edge protection and the position sensor.

According to a preferred embodiment, the device for closing edge protection and the at least one position sensor are designed as one device. This means that the position sensor is integrated in the device for closing edge protection. The position sensor can be arranged in the same housing as the device for closing edge protection.

According to a further embodiment, it is also possible to integrate at least one position sensor into the electronics of the closing edge safety device.

The device according to the invention combines the safety function of the closing edge protection and the detection of the absolute door position in one unit, whereby according to a particularly advantageous embodiment the signaling of the closing edge protection and the signaling of the door position can take place via one and the same signal line.

However, it is also possible to signal the closing edge safety device and the gate position via separate lines.

According to the invention, an additional command transmitter is integrated in the electronics of the closing edge safety device,

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which detects the absolute position of the gate. The command transmitter can advantageously be designed as an inductive or capacitive proximity switch, as a reed contact, as an optical sensor or the like.

The device according to the invention has the advantage that there is no additional wiring effort for limit switches. In addition, no readjustment of the limit positions is necessary, since the actual, absolute position of the closing edge is recorded during each door cycle.

According to a further preferred embodiment, several door positions can be detected, for example the upper and lower end positions as well as intermediate stopping points. For this purpose, the trigger points are provided with a corresponding marking and/or coding, which can be evaluated by the evaluation electronics of the door control or even by the position detection.

These markings and/or codings can, for example, be certain optical codings on the trigger points, which are advantageously attached to the gate frame, which requires optical detection of the gate position.

According to a further embodiment, electronic coding can also be provided. According to this embodiment, transponders are mounted at the respective trigger points. The transponders are advantageously supplied with energy by the position detection in an electromagnetic way and in turn respond with a previously defined electromagnetic signal. The gate position can then be determined on the basis of this response signal.

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Mechanical markings and/or codings (e.g. switches) or magnetic markings (e.g. use of a reed sensor) can also be used. If a switch is used, it is best to have a lever and the switch detects the position on a cam mounted on the door frame.

Further features and advantages of the invention are apparent from the accompanying drawing, in which an embodiment of a door control according to the invention is shown only as an example. In the drawing:

Fig. 1 a gate in elevation;

Fig. 2a

to 2c representations of the signals when the signals of the closing edge safety device and the position sensor are transmitted via one and the same control line;

Fig. 3 is a representation of a signal for signalling the gate position;

Fig. 4 shows a modified representation of a signal for signalling a gate position;

Fig. 5 shows a modified representation for signaling a gate position.

Fig. 1 shows a gate (1) with gate frames (2), a gate leaf (3) and a safety bar (4). The safety bar (4) contains an electronic device (5) in the form of a transmitter and an electronic device (6)

arranged in the form of a receiver. A reference position sensor (10) is integrated in the electronic device (6). The signals from the closing edge safety device (5, 6) and the reference position sensor (10), which is integrated in the electronic device (6), are transmitted to a door control (8) via a spiral cable (7).

The arrangement of the reference position sensor (10) in the electronic device (6) has the advantage that there is no additional wiring effort for the limit switch and that no further adjustment of the limit positions is necessary, since the actual, absolute position of the closing edge is recorded during each door cycle. A trigger point (9) designed as a magnet is provided for recording the absolute position of the closing edge.

If the signals from the closing edge safety device and the position sensor are transmitted to the door control (8) via a single control line (7), either a dynamic principle or a static principle can be applied.

According to Fig. 2a to 2c the dynamic principle is described.

With this principle, the safety edge (4) sends a periodic signal of, for example, 1 kHz when inactive to signal the correct function (life indicator). This periodic signal is shown in Fig. 2a.

Fig. 2b shows the signal when the end position is detected. In this case, a signal with the level "High =1" is output.

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Fig. 2c shows the signal for the safety edge being triggered. The level drops to "Low = 0". The safety edge is triggered when the closing process of the gate must be stopped immediately due to an obstacle. The level shown in Fig. 2c is also signaled when the edge is not connected or is defective.

If the safety edge is triggered and the end position is reached, the safety edge has priority and a "low level" is signaled.

The static principle is essentially the same as the dynamic principle. However, instead of the periodic signal, a static signal is used, for example

—is output to signal correct function (live indicator) (not shown).

Both the dynamic and the static method shown are of particular importance in terms of safety with regard to the device according to the invention for detecting the closing edge position.

The states shown in Fig. 2a to 2c allow the connected door control to recognize relatively clearly whether the sensor is still functional and whether it has been triggered. The detection of errors plays a crucial role in a safety strip.

Various other methods, such as various

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which modulated signals or data protocols are used.

Fig. 3 shows the data transmission according to the dynamic principle of the marked/coded gate position. According to Fig. 3, the areas (11) signal the "live" indicator ¹¹ . The coded position is marked by the area (12). This coded gate position is signaled by a change in frequency.

According to Fig. 4, the signal of the coded position (13) is output as a static signal. The area (11) again represents the "live display".

According to Fig. 5, the static principle is extended by different voltage values for each position. The area (11) again shows the "live indicator". The area (14) shows the area of the triggered safety edge, the area (15) a coded position "1", the area (16) a coded position "2" and the area (17) a coded position "3".

It is also possible to transfer data blocks.

When using data blocks or data telegrams, the device according to the invention will cyclically (in rapid succession) send a data block with the information "live indicator" in the idle state. If an event occurs, for example the safety strip is triggered or the gate position is reached, the data content of the data block will change accordingly. This method can also be used for non-coded gate positions.

020603//CK/dn "

Reference numbers

1 goal

2 gate frames

3 Door leaf

4 Safety bar

5 electronic device

6 electronic device

7 spiral cable

8 Gate control

9 Trigger point

10 Position sensor

11 Signal "Live indicator"

12 coded position

13 coded position

14 "Safety bar triggered ¹

15 coded position "1"

16 coded position "2"

17 coded position "3"

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Claims (10)

1. Device for controlling the closing process of essentially translationally driven door curtains or door leaves of a door, wherein at least one closing edge is provided on the door curtain or the door leaf, which has a device for closing edge securing, wherein the device for closing edge securing has at least one detector for detecting a closing position or an obstacle position, and wherein the control device has at least one position sensor, characterized in that the at least one position sensor ( 10 ) is arranged in and/or on the closing edge ( 4 ). 2. Device according to claim 1, characterized in that the device ( 5 , 6 ) for securing the closing edge and the at least one position sensor ( 10 ) are designed as only one device. 3. Device according to claim 1, characterized in that the device ( 5 , 6 ) for closing edge protection has an electronic and/or switching device in which the at least one additional position sensor ( 10 ) detecting the absolute position of the door is integrated. 4. Device according to claim 3, characterized in that the position sensor ( 10 ) is designed as a mechanical switch or inductive or capacitive proximity switch, as a reed contact or as an optical sensor. 5. Device according to one of the preceding claims, characterized in that the same control line ( 7 ) is provided for transmitting signals from the device ( 5 , 6 ) of the closing edge safety device and the at least one position sensor ( 10 ). 6. Device according to one of the preceding claims, characterized in that trigger points ( 9 ) are provided for the position detection of the gate, and that the trigger points ( 9 ) have at least one marking and/or coding that can be evaluated by the evaluation electronics of the gate control and/or the position detection. 7. Device according to claim 6, characterized in that the at least one marking and/or coding is designed as a mechanical, magnetic, optical or electronic marking and/or coding. 8. Device according to claim 7, characterized in that the at least one mechanical or optical marking and/or coding is arranged on a door frame ( 2 ). 9. Device according to claim 1, characterized in that the at least one electronic marking and/or coding is designed as a transponder. 10. Device according to claim 9, characterized in that the at least one transponder is designed as a transponder electromagnetically supplied with energy by the position detection.