EP0859116B1 - Device for opening and closing a roller shutter, an awning, a smoke curtain or similar - Google Patents

Abstract

The mechanism has an interval and a store function. A sensor registers a blockage in the movement and a further sensor registers the power load of the motor. The interval function is started through changes in the initial values of the first sensor. On opening the control unit action on a drive loading increase, and especially an abrupt increase, the upwards sliding locking action is inserted into the store at a point where, in normal operation, further movement would block the signals of the first sensor. This is not the case where there is not increase in the loading and the drive is brought to rest through the changes in the first sensor signals indicating a blockage in the movement. On an initial upwards locking movement, the sensor signals are phased out after the stored position, and the drive is brought to rest following a loading increase.

Description

The invention relates to a device for opening and Closing a rollable curtain, such as shutters, awnings, Smoke protection curtain, which if necessary by means of a Anti-lift device is attached to a shaft, the Shaft with a controlled by a control unit electric drive is coupled and the control unit as Input variable (s) signals from an inhibition of movement of the curtain-detecting first sensor, and with a second sensor for the detection of the load of the drive.

Such curtains have one end over a so-called Push-up protection on a possibly electric motor drivable shaft articulated and on this shaft to open or closing the curtain can be wound up and unwound. The Anti-lift device is intended to prevent the Closed position of the curtain, for example, by hand in the Open position can be pushed. Such Push-up protection, such as that in the prospectus of Applicant "Push-up protection for roller shutters" described is thus used to protect against burglary. Come as curtains Roller shutters, awnings, smoke curtains and the like into consideration.

A feature of this anti-lift device is that it is in the Closed position of the roller shutter assumes a defined position in which is a quasi rigid connection between the upper end of the curtain and the wave creates. On the other hand, it is a winding of the curtain on the shaft required that the anti-lift device is flush with the shaft so that allows the curtain to be rolled up on the shaft at all is. In this respect, known anti-lift devices are out built up several links, which over thru axles are interconnected. Adjacent links are by means of a spring preload that tends to Push-up protection when the curtain is lowered into a to be extended position, with the limbs in this stretched position quasi rigidly with each other, for example Locking, a contact surface or the like. Coupled together are. Because of this quasi rigid connection between the Blind and the shaft in the lowered position of the blind it is then no longer possible to pull the curtain by hand push up, because by means of the push-up protection for one rigid coupling between the upper end of the curtain and the Wave is taken care of.

This ensures the safe function of the anti-lift device is guaranteed, however, it is necessary that the curtain in the closed position in a very precisely defined position is positioned that the quasi rigid coupling of the limbs the anti-lift device is guaranteed. When operating the Device for moving a curtain with mechanical The limit switch accuracy is usually sufficient for limit switches not out to the defined locking position of the anti-lift device to reach.

For drives with electronic control, which only one The end position switch-off causes the use of such Push-up safeguards as such are not a problem since the Limit switch in both positions due to the load increase of the drive is recognized. However, these can End position controls do not detect any obstacles due to the design, since the switch-off always takes place when the limit is exceeded of the nominal torque of the drive.

In devices for moving the curtain, which in addition to a shutdown in the end positions also one Special sensors or Switching elements for the detection of the emergence of the curtain provided an obstacle. When hitting an obstacle then the drive for rotating the shaft is stopped or it the direction of rotation of the electrical is reversed Drive and thus the shaft. The intended ones Sensors such as those described, for example, in DE-A-44 40 449 are based on the detection of the existence or There is no play between the drive and the Winding shaft or between the drive and the motor bearing.

In such arrangements result from the use of the described anti-lift devices difficulties. The spring elements, which the individual links of the Push-up protection in the quasi-rigid position or Trying to bring rest position, namely, cause that Game between the drive and the winding shaft or Drive and the engine mount before reaching the actual closing position of the curtain is removed. The known devices for moving the curtain react to this by stopping or reversing the Drive. The consequence of this is that the anti-lift device when closing the curtain not in such a defined Position with alignment or locking of the individual links is transferred so that a safe function of the Push-up protection in such a device for the method of a curtain, where also the function of a Impact protection should be met, not always guaranteed is.

A device for opening and closing a rollable Is curtain with the characteristics mentioned known for example from EP 0 703 344 A1. In this Document is a device for automatic Limit switch of a motorized roller blind in the upper end position revealed. The device has two when an adjustable switching torque value is reached or an adjustable switching path length from a first limit switches switching to a second switching position, which are linked together in such a way that the power supply of the engine when the second is present Switch position is interrupted at both limit switches. The Shift torque value is set to a smaller value than that Torque maximum value occurring when the roller blind is raised set. The switching path length is selected so that it corresponds to the torque-displacement curve Torque is less than the switching torque value. At such a limit switch only small forces occur. Alternatively, a computer-controlled solution proposed where the instantaneous values of the actual torque / displacement curve with an entered target curve be compared. With one entered Difference between the difference current torque actual value and the current torque setpoint the power supply is interrupted.

Furthermore, is also from the already mentioned DE 44 40 449 A1 a device for controlling the standstill of Electric motor-operated shutters of the aforementioned Kind known. This standstill control device is characterized in that an electronic device provided for detecting the rotary movement of the electric motor is, which with a control device for feeding a Actual signal for the current rotary movement of the electric motor connected is. The control device compares this actual signal with a reference signal and actuated at one predetermined deviation, the switching device for switching off of the electric motor.

In contrast, the invention is based on the object Device for moving a curtain with the input mentioned features to the extent that the curtain by means of the electric drive in a defined Closing position is transferred in which the function of Push-up protection is guaranteed.

According to the invention, this object is achieved by Device with the features of claim 1.

The control device has an interval function and a Memory function. One sensor, especially that Overrun sensor for the detection of an inhibition of the curtain, For example, by placing the curtain on an obstacle or the window sill is a second sensor, namely a Load sensor to detect the change in load on the assigned electric drive. The interval function will by changing the output of the first sensor (Overrun sensor) started. In the event that First commissioning while the interval function is running a sudden increase in load occurs Control device that the device a Anti-lift device has and sets this operating mode in the memory function and together with a Position information from. This is preferably stored Position determined from the position at the beginning of the Interval function minus any fixed, this position upstream time, distance or Angular interval. This upstream position is recommended for security reasons to ensure that the function of the protection against overrun before the expected curtain emergence switched off on the windowsill. Otherwise there would be the danger that the windowsill recognized as an obstacle, the Drive stopped and that for the function of the Push-up protection required closing position of the Curtain would not be reached. 1/8 are the angular intervals to 1/2 shaft revolutions, preferably about 1/4 Shaft revolutions into consideration. In the event that no erratic Load increase when the control unit is started up for the first time occurs, the device recognizes that the curtain is none Has anti-lift device. To that extent Storage function then the operating mode "spring suspension" or "no anti-lift device available" filed. After Initial commissioning is in the "resilient" operating mode Suspension "the drive by the signal change of the Overrun sensor, i.e. due to the movement inhibition of the curtain, shut down. In the operating mode "Push-up protection" on the other hand, the signal of the Collision sensor hidden from the saved position and the drive is stopped after an increase in load. This ensures that the memory function is independent whether an anti-lift device is used or not, always the optimal one for the closed position of the curtain Travel path is saved. Misinterpretation of Signals sent to the sensors are avoided.

According to a first embodiment of the Invention proved to be advantageous that the interval function has a path interval which preferably has a value in Range of about 1/8 to 1/2 shaft revolutions, preferably 1/4 Turns of the shaft.

Another possibility for the formation of the interval function is also that it has a time interval.

It makes sense that the sensor that the Interval function starts on a change in the game between drive and shaft or drive and drive bearing is sensitive.

There is also the possibility that when an occurrence occurs an inhibition or a load increase during the course of the Interval function of the associated travel path of the curtain in the storage function is stored.

On the other hand, is a during the installation trip No increase in load occurs during the course of the Interval function determined, the travel path of the Curtain at the time of the change in the output size of the a sensor is stored in the storage device.

The increase in load of the curtain by means of a Torque sensor or a current sensor for the electrical Drive detected.

The anti-lift device advantageously consists of several articulated links.

It makes sense that adjacent links with the Bias is applied to a spring affecting the limbs in the closed position of the curtain in a stable or quasi stable positioning, especially in a locked position, transferred.

The invention also relates to the use of such Device (for opening and closing a rollable curtain).

Further advantages and possible uses of the present Invention result from the following description an embodiment with reference to the drawings.

Figur 1

in schematischer Darstellung einen mittels Hochschiebesicherungen an einer Welle befestigten Behang in Draufsicht,

Figur 2

eine schematische Darstellung einer Hochschiebesicherung und

Figur 3

die Vorrichtung der Figur 1 in Seitenansicht.

Show it:

Figure 1

a schematic representation of a curtain fastened to a shaft by means of anti-lift devices in plan view,

Figure 2

is a schematic representation of an anti-lift device and

Figure 3

the device of Figure 1 in side view.

In Figures 1 and 3, the structure of the device for Method of a curtain 8 shown, the curtain 8 with an anti-lift device 2 is attached to a shaft 1, which is connected to a drive. The Push-up protection 2 is at one end, for example by means of Tapping screws or the like attached to the winding shaft 1. The the other end of the profile rail 5 of the anti-lift device 2 according to the Embodiment in an initial rod 7 of the curtain 8, for example. The roller shutter inserted.

The anti-lift device 2, which is shown separately in FIG. 2, consists of a plurality of links 4 which are pivotally connected to one another via thru axles. Springs 3 are fastened to the thru axles, and the links 4 are arranged adjacent to them act and in the closed position of the curtain 8 a latching or a quasi rigid Stretch the limbs 4. This leads to the curtain 8 or the roller shutters by unauthorized persons not from the closed position, e.g. by hand to the open position can be moved.

This securing position of the anti-lifting device 2 is a schematic representation of the Figure 1 can be seen, the links quasi when the curtain 8 is pushed up are rigidly coupled. In contrast, when winding the curtain 8 lie on the Shaft 1 links 4 of anti-lift device 2 flush with the outer casing of shaft 1 since the links 4 are connected to one another in an articulated manner and adjacent links 4 can pivot against the action of the force of the associated spring 3.

In devices for moving the curtain 8, which, for example, in addition to a End position shutdown also enable shutdown in the sense of drain protection should, if the curtain 8 collides with an obstacle, the drive is stopped and possibly also reversed. This impact of the curtain 8 on an obstacle is caused by Sensors or special switching elements are detected. These sensors can, for example the presence or absence of play between the drive and the React shaft 1 or between the drive and a bearing of the drive. Indeed prepares the use of the anti-lift device 2 described above with regard to Impact protection function occasionally problems. The springs 3, which the individual links 4th try to push the anti-lift device 2 into the detent or quasi-rigid position, cause unscrewing the game between the drive and the shaft 1 or the shaft 1 and the bearing of the drive even before the actual closed position of the curtain 8 is reached. Thus, the sensor of the known devices closes Moving the curtain 8 to a running up of the curtain and shutting down the drive or reverses the direction of rotation. However, it is not always guaranteed that the Locked position or the quasi rigid position of the links 4 of the anti-lift device is taken, so that under certain circumstances the function of the anti-lift device even cannot be used.

In order to avoid this, it is provided that the curtain 8 is first moved to the closed position, the position at which the game between the drive and the shaft 1 or the bearing and the shaft 1 removed is recorded and saved. In this position, the Device the drive, however, not stopped, but so far within one Continue the specified path or time interval until either the path or Time interval is exceeded or within the path or time interval a sudden Load increase of shaft 1 or the drive is detected, whereupon the drive is switched off. When the time or path interval expires without an occurrence The device or the control device thus recognizes sudden load increases automatically, that the curtain 8 not via a push-up protection 2, but via Springs or the like is connected to the shaft 1, as is the case with conventional curtains 8 is common. In this case, the control device uses the lower switch-off point the previously saved reference point at which the game is taken out, saved.

However, if one occurs during the installation journey or Initial commissioning a sudden or sudden load increase on what by means of a Load sensor is detected, the control device recognizes that the curtain 8 via a Anti-lift device 2 is connected to shaft 1. In this case, the Storage function the anti-lift device operating mode "with a Position information stored, this position information in normal operation Position defines from which to ensure the function of the anti-lift device the anti-surge protection is hidden. Preferably the saved position determined from the position at the beginning of the interval function minus a tolerance path or a tolerance angle related to the winding shaft. So the reacts Control device in normal operation or after the initial installation from the previous stored position is not due to unscrewing the game, which is due to the The presence of the anti-lift device 2 occurs.

During the normal downward movement of the curtain 8, however, a Unscrewing the game is still interpreted as running into an obstacle and the Drain protection function activated so that the drive is stopped or reversed. However, this only takes place after the device has been started up for the first time. So is a flawless interaction between the combination between collision protection and Push-up protection guaranteed.

For this purpose, the control device links the signal from the sensor, which is used to detect the Unscrewing the game is used, with a drive anyway in general available path information and hides the signal, which by unscrewing the Game is generated due to the presence of the anti-lift device 2. For this a defined time or path interval is provided, which is before the expected lower one End switch-off point. This is over the other travels of the curtain 8 Signal from the sensor, however, as a switch-off criterion with regard to a Impact protection function approved. The path interval within which the signal regarding the turning out of the game is suppressed as a switch-off criterion, moves in Range of, for example, 1/4 shaft rotation before the optimal closed position. So that is ensured that the curtain 8 is in the closed position and others the links 4 of the anti-lift device 2 are transferred into the securing position.

Reference list

1 -

wave

2 -

Push-up protection

3 -

feather

4 -

Limbs

5 -

Profile rail

7 -

Starting rod

8th -

Curtain

Claims (11)

1. Device for opening and closing a rollable curtain (8), which in a given case is fastened to a shaft (1) by means of a height displacement securing (2), wherein the shaft (1) is coupled with an electric drive controlled by a control unit and the control unit is supplied with signals as input magnitude or magnitudes from at least one sensor detecting blocking of the movement of the curtain (8), and with a second sensor for recognition of the loading of the drive, characterised in that

   an interval function and a memory function are provided,

   the interval function is started by change in the output magnitude of the first sensor,

   during the course of the interval function

   a) on the first putting into operation of the control unit and in the case of occurrence of a load increase of the drive, especially an abrupt load increase, the operating mode "height displacement securing present" is filed in the memory together with a position, from which position in later normal operation the signal of the first sensor is faded out,

   b) on the first putting into operation of the control unit and without occurrence of a load increase, the operating mode "without height displacement securing" is filed in the memory function,

   c) after the first putting into operation and in the operating mode "without height displacement securing", the drive is stopped by signal change of the first sensor (i.e. through blocking of the movement of the curtain) and

   d) after the first putting into operation and in the operating mode "height displacement securing present", the signal of the first sensor is faded out from the stored position and the drive is stopped after a load increase.
2. Device according to claim 1, characterised in that the position filed in the memory function in the operating mode "height displacement securing present" is ascertained from the position of the curtain (8) at the start of the interval function less a predetermined time interval, travel interval or angle interval.
3. Device according to claim 1 or 2, characterised in that the interval function comprises a travel interval which preferably assumes a value in the range 1/8 to 1/2 shaft revolutions, preferably about 1/4 shaft revolutions.
4. Device according to claim 1, characterised in that the interval function comprises a time interval or an angle interval referred to the winding shaft.
5. Device according to one of the preceding claims, characterised in that the one sensor, which starts the interval function, is sensitive to, in particular, a change in the play between drive and shaft (1) or the drive and drive bearing.
6. Device according to one of the preceding claims, characterised in that on occurrence of a blocking or load increase during the elapsing of the interval function the associated travel path of the curtain (8) is filed in the memory function.
7. Device according to one of the preceding claims, characterised in that during the first putting into operation or during the installation travel of the curtain (B) and in the case of non-occurrence of a load increase during the elapsing of the interval function, the travel path of the curtain (8) is filed in the memory device at the instant of the change in the output magnitude of the one sensor.
8. Device according to one of the preceding claims, characterised in that the load increase of the curtain (8) is detected by means of a torque sensor or a current sensor for the electric drive.
9. Device according to one of the preceding claims, characterised in that the height displacement securing consists of several pivotably interconnected elements (4).
10. Device according to claim 9, characterised in that adjacent elements (4) are loaded by the bias of a spring (3), which conveys the elements, in the closed setting of the curtain, into a quasi stable setting, especially into a detent setting.
11. Use of a device according to one of claims 1 to 10 for the opening and closing of a rollable curtain.

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