DE102014008854B4 - Emergency rewind for electrically operated glare and sun protection systems - Google Patents

Abstract

Unwinding device (1) with an emergency winding (2), in particular for glare or sun protection systems, shutters or roller shutters, with a shaft (4) for winding or unwinding of a flexible surface element, which at one end a bearing pin (8 ) For fixed, rotatable mounting and at the opposite end an electrically revisable tubular motor (5), on the one hand a motor pin (6) for stationary storage and on the other hand with the shaft (4) rotatably connected output member (7), - wherein the emergency - Unwinding (2) an unlocking device (10) and a mechanical drive device (11), - wherein the unlocking device (10) prevents a rotational movement of the motor pin (6) in normal operation and after an operation in case of emergency releases a rotational movement of the motor pin (6) and thereby enables a spring-loaded winding, and - wherein the mechanical drive device (11) is designed as a drive spring (12), there characterized in that the power spring (12) coaxially wound around the motor pin (6) and adjacent to the unlocking device (10) on the motor pin (6) is arranged, wherein the mainspring (12) is fixedly arranged at its outer end and at its inner end exerts a torque on the motor pin (6) in the winding direction, wherein the mainspring (12) is connected at its inner end directly to the motor pin (6).

Description

The invention relates to an electrically operated unwinding device with emergency winding, in particular for glare or sun protection systems, shutters or roller shutters, according to claim 1.

To ensure adequate fire protection, especially for schools, residential complexes, hospitals, retirement homes, administrative buildings, there are legal regulations for escape routes, emergency exits and emergency exits. The requirements result from the respective state building regulations (LBO) and the workplace guidelines (ASR). For example, in Baden-Württemberg (see LBO BW § 28) the following requirements apply to components in escape routes:
"Doors and windows that serve to rescue people in a fire or counteract the spread of fire and smoke must be designed and arranged to meet the requirements of fire safety."

• „(1) Beim Einrichten und Betreiben von Fluchtwegen und Notausgängen sind die beim Errichten von Rettungswegen zu beachtenden Anforderungen des Bauordnungsrechts der Länder zu berücksichtigen. Darüber hinaus können sich weitergehende Anforderungen an Fluchtwege und Notausgänge aus dieser Arbeitsstättenregel ergeben. Dies gilt z. B. für das Erfordernis zur Einrichtung eines zweiten Fluchtweges.
• (2) Fluchtwege, Notausgänge und Notausstiege müssen ständig freigehalten werden, damit sie jederzeit benutzt werden können.”

The associated definitions are z. B. ASR A2.3, point 4:

• "(1) When setting up and operating escape routes and emergency exits, the requirements of the building regulations of the Länder to be observed when erecting escape routes must be taken into account. In addition, further requirements may arise for escape routes and emergency exits from this workplace rule. This applies z. B. for the requirement to set up a second escape route.
• (2) Escape routes, emergency exits and emergency exits must be kept clear at all times so that they can be used at any time. "

The practice shows a different, uneven design and gray area in the acceptance test, since the use of electric motors in glare and sun protection systems in construction planning and manufacturing, in daily use and in an emergency so far has many problems and many disadvantages. Windows or balcony doors intended as escape route or emergency exit are increasingly equipped with electric shutters or other electrically driven glare and sun protection systems. These then often pose a barrier in case of fire or emergency, especially in the event of a power failure or in the dark.

The legislature will also have the task of defining this gray area "electric shutters" more precisely. These problems and disadvantages of a "simple emergency release of electric motors" have not yet been satisfactorily and inexpensively solved by the industry.

This problem can be avoided by using mechanical motors with an emergency hand crank. However, this eliminates the desirable use of electronically controlled motors (Plug & Play). In addition, can be in an emergency and power failure, the engine only very slowly and with constant effort with the crank to turn up. In roller shutters with external revision such solutions are not or only difficult to use.

Furthermore, electric motors with battery backup are known. However, these must be subjected to costly maintenance and inspection checks at least once a year, which is associated with high follow-up costs. The batteries used usually have a limited power, so that only a relatively slow opening is possible. In addition, such batteries are expensive and still have durability issues. Finally, the disposal of the battery is contaminated with environmental impact.

From the DE 199 18 489 C2 is a winding cover device with emergency winding known in which on a shaft, a flexible long part, z. As a shutter, is fixed, which is wound in an open state on the shaft and unwound in a closed position of the shaft. In the shaft, a reversible tubular motor is arranged, on the one hand has a driven part for driving the shaft and the other hand is fixedly supported on a stationary bearing with a motor pin. Between the driven part and the shaft, a tension spring is arranged, which is tensioned in normal operation and locked in rotation with the driven part. In an emergency, this connection can be unlocked by means of a mechanical actuator, wherein the tension spring on the one hand axially displaces the tubular motor within the shaft and on the other hand rotates the shaft for winding the shutter relative to the tubular motor in the winding.

This device has the disadvantage that in an emergency, the relatively heavy and under circumstances standing under train tubular motor must be moved axially by the tension spring, which either high forces required or otherwise carries the risk of jibing, so that the emergency winding fail in an emergency could. In addition, this emergency winding can not be combined with conventional devices, but conventional winding cover devices must be constructively adapted to emergency winding.

Furthermore, from the US 2005/0 126 723 A1 a unwinding known, the spring is coaxially wound around the motor pin, which simplifies the assembly advantageous.

From the generic US 5,711,360 A Further, a drive device for shutters with an emergency winding is known, comprising a shaft for winding and unwinding of the shutter, which has at one end a bearing pin for stationary, rotatable mounting and at the opposite end of an electrically reversible tubular motor. The tubular motor has in turn at one end a motor pin for stationary storage and on the other hand, a rotatably connected to the shaft output member. In the interior of the journal, a spring element is arranged, which is biased when closing the shutter and thereby exerts a torque in the opening direction of the roller shutter. At the stationary end of the motor pin an unlocking device is further arranged, which prevents a rotational movement of the motor pin in normal operation and releases after an operation in an emergency rotational movement of the motor pin by means of the spring element.

This device has the disadvantage that the shaft is constantly under spring tension under normal operation. In addition, equipping commercial, motor-assisted systems with such emergency rewinding is cumbersome because the elements of the emergency rewind are located at opposite ends of the system and therefore a complete redesign of the systems is necessary. Finally, the use of suitable spring elements is very limited by the arrangement within the shaft.

The object of the invention is therefore to provide an unwinding device with emergency winding, which is simple in construction, works reliably in an emergency and forms a compact unit.

This object is achieved by an unwinding device with emergency winding with the features of claim 1. Advantageous embodiments are the subject of further claims.

The unwinding device according to the invention with emergency winding, in particular for glare or sun protection systems, shutters or roller shutters, comprises a shaft for winding or unwinding of a flexible surface element having at one end a bearing pin for stationary, rotatable mounting and at the opposite end having electrically revisable tubular motor, said tubular motor on the one hand has a motor pin for stationary storage and on the other hand rotatably connected to the shaft output member, wherein the emergency winding comprises an unlocking device and a mechanical drive device, and wherein the unlocking device after an operation in an emergency spring-loaded winding allows, wherein the mechanical drive device is designed as a mainspring. The unlocking device is designed such that it prevents a rotational movement of the motor pin in normal operation and releases a rotational movement of the motor pin after an emergency operation.

In order to provide a space-saving and simply constructed device according to the invention, the mainspring coaxially wound around the motor pin and adjacent to the unlocking device arranged on the motor pin, wherein the mainspring is stationary at its outer end and at its inner end exerts a torque on the motor pin in the winding, wherein the mainspring is connected at its inner end directly to the motor pin.

In order to ensure the most reliable function of the emergency rewind, the unlocking device can be designed as arranged transversely to the direction of rotation of the shaft locking part, wherein the motor pin in the unlocking device has a deviating from the circular profile cross-section, and wherein the locking part open from above, For receiving the motor cross-section corresponding to the profile cross section. Furthermore, the locking part can be held in the vertical direction by elastic or easily releasable securing elements in a locking position. Since the locking part must essentially support the occurring torques during winding and unwinding, but the bearing points absorb the weight force, only a small force has to be expended for unlocking the emergency winding.

Through the use of a slip ring for electrical contacting of the tubular motor can be prevented that during an emergency winding the electrical connection line twisted and thereby damaged or hinders the function under certain circumstances.

In order to enable an emergency rewind in an emergency both by the occupants of the building as well as by rescue workers outside the building, the unlocking device can be made operable from the inside and outside.

Typically, such unwinding devices are placed in a wallbox. In this case, the emergency winding can be arranged within the wall box, which does not require additional space. However, if the available space in the wall box is not sufficient, the emergency winding can be arranged outside the wall box.

The device according to the invention offers the overall advantage that in an emergency lightning fast winding is possible, even at a Power failure. It is also suitable for all electrically operated glare and sun protection systems and electric roller doors, without the original structure must be significantly changed. Furthermore, the operation is possible with little effort. Since it is a mechanical solution, only low maintenance costs can be expected.

Further advantageous details of embodiments of the invention will become apparent from the dependent claims, the drawings, and the accompanying description. The invention is described below by way of example with reference to a drawing, wherein the schematic diagrams show:

1 A first embodiment of an unwinding device according to the invention with emergency winding in a vertical section (inside),

2 a view according to arrow II in 1 on an unlocking device, and

3 A second embodiment of an unwinding device according to the invention with emergency winding in a vertical section (outboard).

In 1 is a total with 1 characterized unwinding device with an emergency rewind 2 shown. The unwinding device 1 is preferably in wall openings, such as windows or balcony door openings, arranged and is designed as glare or sun protection system, as a roller shutter or as a roller shutter. In the following the invention will be described using the example of a shutter system, the invention not being limited to this embodiment. The unwinding device 1 includes a wave 4 on which a flexible, not shown surface element can be wound up or unwound. In the case of a roller shutter, the surface element on narrow rail elements which are pivotally connected to each other in the direction of the shaft axis. The roller shutter is preferably in a wall box 3 arranged, which has on the underside a not shown, extending substantially over the entire transverse side exit slot. Through this exit slot, the roller shutter can extend when unwinding down and is then held on opposite sides in each case in a guide rail.

The wave 4 is at one end - in the embodiment right - executed hollow and takes in an electrically reversible tubular motor 5 on. That is, the direction of rotation of the tubular motor can be reversed electrically for unwinding or winding of the surface element. When de-energized, the rotor and stator are locked against rotation by means of a motor brake. The tubular motor shown in a schematic diagram 5 has one as a motor pin 6 running stator, as well as a relative to the stator, as a stripping section 7 executed rotor, the rotation with the shaft 4 connected is. At the the tubular motor 5 opposite end is on the shaft 4 also a journal 8th arranged. The journal 8th and the motor pin 6 are arranged coaxially and two on the wall box 3 On opposite sides arranged bearings 9a . 9b vertically supported and rotatably mounted.

Outside, at the engine spigot 6 facing side of the wall box 3 is still the total with 2 marked emergency rewind arranged. This has an unlocking device 10 and a mechanical drive device 11 on and includes the motor pin 6 coaxial. In the illustrated embodiment, the mechanical drive device 11 and the unlocking device 10 adjacent in the wall box 3 arranged, whereby this order is also reversed or outboard ( 3 ) can be performed.

Shown is the mechanical drive device 11 as a driving force 12 coaxial with the motor pivot 6 is wound up. At the inner end is the mainspring 12 connected to the motor pin while the outer end of the mainspring 12 stationary, for example, on the housing 13 the emergency rewind is arranged. The mainspring 12 exerts in the wound state a torque in the winding direction on the motor pin 6 out.

The unlocking device 10 , in the 2 is shown in more detail in a plan view, is designed such that it in the normal operation of the unwinding device 1 a rotational movement of the motor pin 6 prevented and after an operation in an emergency rotation of the motor pin 6 releases. For this purpose, the unlocking device 10 according to the embodiment as vertically in the housing 13 arranged locking part 14 executed, in the upper central region of a freewheeling cross section 15 for the engine journal 6 having. The motor pin 6 points at least in the area of the unlocking device 10 a profile cross-section deviating from the circular shape 16 on, for example, as in 2 shown with an octagonal profile cross-section. The freewheel cross section 15 in the locking part 14 has accordingly at its bottom end to the profile cross-section 16 corresponding form. Furthermore, the locking part 14 on opposite sides over housing struts 21 or directly on the housing 13 supported, so that when winding or unwinding of the surface element on the motor pin 6 acting torques on the locking part 14 and from there on the housing 13 be supported.

At rest, that is with inactive tubular motor 5 , acts on the motor pin 6 no torque, but only the weight of the take-up device 1 and the surface element, not shown. However, this weight is due to the bearings 9a . 9b (in 2 symbolically represented as a ball bearing). Thus acts in the resting state on the locking part 14 only your own weight. This is done with the help of one or more security elements 17 added. In the embodiment are at the upper end of the locking part 14 on opposite sides of the freewheel cross section 15 one spring element each 17a . 17b arranged, which respectively in the vertical direction at the top of the housing 13 is attached. Furthermore, at the bottom of the case 13 a for carrying out the locking part 14 suitable slot 18 provided by the locking part 14 with the help of an emergency operation 19 can be pulled down. The spring elements 17a . 17b are designed so that the weight of the locking part 14 is sufficiently compensated, so that an unwanted drop in the locking part 14 is prevented. On the other hand, the spring force is preferably not designed to be stronger than necessary, so that the emergency operation 19 can be operated with little effort.

Alternatively, the security elements 17 also be designed as a suspension or support. In the case of suspension, the spring elements 17a . 17b replaced by wires, cords, plastic elements or the like, wherein the tear strength or the load capacity of the attachment are designed according to the requirements described above. In the case of support, the spring elements 17a . 17b replaced by folds, noses or the like, which are overprinted in an emergency.

Will the emergency winding up 2 with the help of the emergency operation 19 unlocked, so eliminates the non-rotatable mounting of the motor pin 6 of the tube motor 5 , That's why it can be from the mainspring 12 applied torque the motor pin 6 and thus the tubular motor 5 together with the wave 4 in the winding direction. The mainspring 12 is preferably designed so that the torque is sufficient to completely roll up the surface element within a few seconds. For controlling the tubular motor 5 is an electrical contact 20 intended. Preferably, in this case, an unillustrated slip ring is used to prevent during an emergency winding twisting of the electrical line and a simple repair of the mainspring 12 to ensure after the operation in an emergency.

The emergency operation 19 can be executed in the simplest case as a cord or belt. By pulling on the cord or on the strap becomes the locking part 14 against the security elements 17 through the slot 18 in the case 13 pulled down, thereby unlocking the emergency winding, so that the surface element with the help of the mainspring 12 automatically wound up completely in a short time. In the example of a roller shutter can thus in case of fire, in which the power fails under certain circumstances, this can be completely opened easily, quickly and without much effort and thus release an escape route. Preferably, this is the emergency operation 19 arranged within the building and possibly marked accordingly and / or secured. Thus, people in the building can emergency operation 19 trigger. In addition, however, can also be another emergency operation 19 be relocated to the outside of the building, so that an emergency operation by the fire department or other rescue services can be triggered.

Another embodiment of an unwinding device 1 with emergency rewind 2 is in 3 represented deviating from 1 the emergency winding up 2 outside the wall box 3 is arranged. Furthermore, the order in the arrangement of the individual components is reversed, without thereby changing the basic operation of the device.

LIST OF REFERENCE NUMBERS

1

Unwinding device

2

Emergency winding

3

wall box

4

wave

5

tubular motor

6

motor journal

7

stripping section

8th

pivot

9a, b

bearings

10

unlocking

11

mechanical drive device

12

mainspring

13

casing

14

arresting

15

Freewheeling section

16

Profile cross section

17

fuse elements

18

slot

19

emergency operation

20

electrical contact

21

housing strut

Claims (7)

Unwinding device ( 1 ) with an emergency winding up ( 2 ), in particular for glare or sun protection systems, roller shutters or roller shutters, with a shaft ( 4 ) for winding or unwinding of a flexible surface element, the one at one end Bearing journal ( 8th ) for stationary, rotatable mounting and at the opposite end an electrically revisable tubular motor ( 5 ), on the one hand a motor pin ( 6 ) for stationary storage and on the other hand one with the shaft ( 4 ) rotatably connected output member ( 7 ), the emergency winding up ( 2 ) an unlocking device ( 10 ) and a mechanical drive device ( 11 ), - wherein the unlocking device ( 10 ) in normal operation, a rotational movement of the motor pin ( 6 ) and after an operation in an emergency rotation of the motor pin ( 6 ) and thereby enables a spring-loaded winding, and - wherein the mechanical drive device ( 11 ) as a driving force ( 12 ), characterized in that the mainspring ( 12 ) coaxially around the motor journal ( 6 ) and adjacent to the unlocking device ( 10 ) on the motor journal ( 6 ) is arranged, wherein the mainspring ( 12 ) is fixedly arranged at its outer end and at its inner end a torque on the motor pin ( 6 ) in the winding direction, wherein the mainspring ( 12 ) at its inner end directly with the motor pin ( 6 ) connected is. Device according to claim 1, characterized in that the unlocking device ( 10 ) as transverse to the axis of rotation of the shaft ( 4 ) vertically arranged locking part ( 14 ) is executed, that the motor pin ( 6 ) in the region of the unlocking device ( 10 ) a deviating from the circular shape profile cross-section ( 16 ), and that the locking part ( 14 ) in the installed state open from above, to the profile cross-section ( 16 ) corresponding freewheel cross section ( 15 ) for the motor journal ( 6 ) having. Device according to claim 2, characterized in that the locking part ( 14 ) in the vertical direction by elastic or easily detachable securing elements ( 17 ) is held in a locking position. Device according to one of claims 1 to 3, characterized in that a slip ring for electrical contacting ( 20 ) of the tubular motor ( 5 ) is provided. Device according to one of claims 1 to 4, characterized in that the unlocking device ( 10 ) is operable from inside and outside a building. Device according to one of claims 1 to 5, characterized in that the unwinding device ( 1 ) in a wall box ( 3 ), the emergency rewinding ( 2 ) within the wall box ( 3 ) is arranged. Device according to one of claims 1 to 5, characterized in that the unwinding device ( 1 ) in a wall box ( 3 ), the emergency rewinding ( 2 ) outside the wall box ( 3 ) is arranged.

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