EP0043021B1 - Automatic safety device for a roller shutter - Google Patents

Abstract

The subject of the invention is an automatic locking mechanism for a revolving shutter to protect the latter against unauthorized pulling up from the outside, using a locking device which is moved into the locking position after the revolving-shutter casing has been lowered. The device has a lateral axle bearing, with a round bearing element (11) for a belt pulley (2) and a fixed square bearing pin (8) connected thereto and the end of which is designed as a round cylinder. The belt pulley (2) has an annular web (2a) and the roller insertion cap (1) has an annular web (1a), the side webs (1a/2a) having different diameters and interlocking coaxially. A pivotable locking lever (6) engages positively through coinciding gaps. In the lowered state of the revolving-shutter casing, the lever (6) engages with the fixed bearing pin (8) and clamps belt pulley and roller insertion cap against unauthorized turning, so that the revolving-shutter roller connected to the roller insertion cap is also locked.

Description

This invention relates to an automatic securing of a roller shutter against unauthorized pushing up from the outside by means of a locking device which is moved into its locking position after the roller shutter curtain has been lowered, in particular a locking of the roller shutter shaft. This fuse can be used in roller shutters made of metal, wood, plastic or several combined materials of this type and can be combined with known locking devices for securing roller shutters in order to improve the effectiveness of such security devices.

A large number of locking devices or security devices for roller shutters are known which function according to a wide variety of mechanisms. However, such devices are usually of complex construction and are therefore susceptible to faults, or their locking mechanism deteriorates too quickly in its functionality. Very often they are also expensive to buy and maintain. In addition, such devices can only be installed to a limited extent or not at all or at least several different types of roller shutters.

DE-A-27 48 411 describes an automatically acting roller shutter locking device in which the winding roller for the roller shutter shell encloses a roller shutter roller (hollow axis) into which a fixed locking component projects from the side. A lever is installed on the roller shutter curtain, which engages through openings in the winding roller and the roller shutter roller into the locking component when the roller shutter is lowered. The fulcrum of the lever is either at the fastening point of the lever with the roller shutter roller or the winding roller.

Due to the coaxial arrangement of the winding roller and the roller shutter roller, this embodiment requires a minimum diameter which considerably exceeds that of a simple shaft, so that a considerable space requirement is present when the roller shutter armor is wound up.

From DE-B-20 59 485 an automatic securing of a roller shutter against pushing up from the outside is known by means of a lock which can be actuated via a two-armed lever depending on the winding position of the roller shutter curtain. In this case, a disk, which has a spiral guide groove, is connected in a rotationally fixed manner to the roller shutter winding roller, a guide pin arranged on the upper lever arm engaging in this groove and a lower lever arm being connected to the bolt. However, this known roller shutter lock has the disadvantage that a design-related space requirement in addition to the roller shutter shaft is necessary for the backup.

Subject of German patent 24 37 912 is an automatic securing of a roller shutter against unauthorized pushing up from the outside by means of a locking device connected to the roller shutter shaft, which is moved into its locking position after the roller shutter curtain has been lowered and engages with the roller shutter curtain and / or the guide rail of the roller shutter curtain is coming. The characteristic of this securing is that the bolt is formed by an arm of a two-armed lever mounted within the roller shutter shaft, which lever can be moved out of the roller shutter shaft by an opening in the roller shutter shaft, or that segments of the shell of the roller shutter shaft are articulated to one another in the axial direction are connected that they fold out of the circumferential line of the shaft in the lowered state of the roller shutter curtain.

The disadvantage of this security is that although it prevents the roller shutter curtain from being pushed up from the outside, it does not secure the roller shutter shaft against unauthorized rotation.

From DE-A-28 25 059 an automatic securing of a roller shutter against unauthorized pushing up from outside is known, in which a locking of the roller shutter shaft, which is activated after the roller shutter curtain is lowered, is provided. The constructive solution of this fuse provides that an eccentric lever is provided on the outer side of the belt pulley end piece, which automatically comes into engagement with an abutment located in the region of the suspension of the roller shutter shaft after the roller shutter curtain has been lowered, and a locking of the roller shutter shaft against an upward movement of the Roller shutter curtain causes and that the eccentric lever can be released from the abutment by rotating the belt pulley in the direction of the upward movement of the roller shutter curtain.

This automatic securing represents an advance in the field of roller shutter construction, which can also be used for retrofitting in existing roller shutter systems, but is not equally suitable for all belt pulley sizes and types.

It is therefore the object of the present invention to provide a simple automatic securing of a roller shutter against unauthorized pushing up from the outside, which can be installed equally well in existing roller shutter devices, in which the roller shutter shaft is secured against unauthorized turning due to the structural design and which is different for belt pulleys Designs are equally suitable.

This object is achieved on the basis of the automatic backup described at the outset by the features listed in the characterizing part of claim 1. The insert capsule, which forms the pivot bearing for the roller shutter shaft, is non-positively connected to the belt pulley by means of a locking lever and the locking lever comes into engagement with the fixed bearing pin of the roller shutter shaft at the same time.

The present invention thus relates to an automatic securing of a roller shutter, in which the belt pulley and the roller insert capsule are positively engaged with one another by a pivotable locking lever, the pivotable locking lever engages with a bolt fixed to the axis of rotation of the roller shutter armature when the roller shutter curtain is lowered. The fuse according to the invention is particularly suitable for locking the fully lowered roller shutter curtain, but it is also useful for fixing other settings of the roller shutter curtain.

It is also provided that an annular side web of the belt pulley with a correspondingly arranged and designed annular web on the roller insertion capsule is positively engaged with one another by a pivotable locking lever, the pivotable locking lever comes into engagement with a roller shutter that is lowered with a bolt that is fixed to the axis of rotation of the roller shutter and the side webs are different in diameter and intermesh coaxially, each having approximately matching openings of different widths.

Further preferred embodiments of the constructive training are described in the subclaims.

In the lowered state, in addition to the non-positive connection between the belt pulley and the plug-in capsule of the roller shutter shaft, a non-positive connection between the plug-in capsule and the belt pulley is established via a pivotable locking lever which, by its simultaneous engagement with the fixed bearing pin, blocks the roller shutter shaft against undesired rotary movement. The unlocking takes place in that a slight rotary movement of the belt pulley relative to the roller insert capsule is triggered via the belt webbing and thus a displacement of the openings in the side webs of the belt pulley and insert capsule is triggered against each other, whereby the edge of the side web at the opening of the insert capsule on one lever arm of the acts pivotable locking lever, thereby compensating for the force of the spring and by pivoting the other lever arm from engagement with the bearing pin or the tine wheel arranged thereon. In order to produce this effect, the side webs are arranged coaxially with respect to one another and have correspondingly designed openings of different widths which are arranged in the correct position, through which one lever arm of the locking lever extends. The lock is released as soon as tension is exerted on the belt pulley by means of the belt strap. With the roller shutter curtain lowered and the belt on the belt pulley essentially relieved of tension, the openings in the side webs are in relation to one another such that one lever arm of the rocker arm engages through both side webs under the force of the spring and at the same time the other lever arm of the rocker arm engages and engages with the stationary one Bearing pin generated so that rotation of the roller shutter shaft is not possible. An unauthorized torque acting on the roller shutter shaft leads to a slight displacement of the openings of the side webs to each other, but does not release the lock. The low belt tension, which is generated by a spring in the belt winding box or equivalent device with the roller shutter lowered, is not sufficient to initiate the unlocking process, although the belt is not completely relaxed. Unlocking is only possible if there is sufficient torque on the belt pulley when the roller shutter curtain is pulled up.

To unlock it is crucial that first the edge of a recess in the side web of the belt pulley acts on the locking lever and thus pivots it, so that the breakthrough edge of the side web of the roller insert capsule engages in such a way that the rocker arm remains pivoted out, which remains in the opposite direction permanently the rocker arm acting spring force is compensated and the other lever arm of the rocker arm is released from its locking engagement with the bearing pin by the pivoting movement.

In order to prevent an unauthorized influence on the belt pulley from the outside, a securing cover, which partially overlaps or encompasses the belt pulley, can be provided on the side of the belt pulley facing the roller shutter armor.

In a preferred embodiment, the automatic securing of the roller shutter shaft according to the present invention is combined with the automatic securing via the casing of the roller shutter shaft according to German patent 2437912. This preferred combination includes two possibilities. In the first possibility, an additional locking of the roller shutter curtain and / or the guide rail is achieved by an arm of a two-armed lever which is mounted within the roller shutter shaft and which can be moved out of the roller shutter shaft through an opening in the latter. In the second possibility according to the German patent, an additional locking of the roller shutter armor is provided by one or more segments of the casing of the roller shutter shaft, which are articulated in the axial direction in such a way that they fold out of the circumferential line of the shaft in the lowered state of the roller shutter armor.

Because of details of this additional locking over the jacket of the roller shutter shaft, in particular by means of a fold-out Segment from the roller shutter shaft, reference is made to the content of DE-C-24 37 912. This securing of the roller shutter curtain prevents it from being undesirably pushed up into the space between the roller shutter shaft and the roller shutter box wall.

The fuse according to the present invention locks the roller shutter shaft against unauthorized rotation. The preferred combination of both security devices ensures optimum protection of the roller shutter against unauthorized pushing up. The particular advantage of the constructive design according to the invention is that it can be built into existing roller shutter constructions at any time, no additional space is required for this device and a safe and reliable function is guaranteed. Maintenance of the locking mechanism is not required. The usual structural embodiments of the roller shutter shaft and other parts can therefore be retained without modification if the securing device according to the invention is attached. This also results in considerable economic advantages because no changes in the production, storage and final assembly of the roller shutters are necessary.

The inventive design of the roller shutter protection against unauthorized pushing automatically comes into the locked position when the roller shutter curtain is lowered, so it cannot be forgotten and thus reliably fulfills its task. The installation of the security device according to the invention in new or already existing roller shutter devices also has an economic impact because possible break-ins in buildings secured in this way are made more difficult or even prevented. The security according to the invention thus belongs to the area of preventive measures against burglaries.

• Figur 1 zeigt eine perspektivische Explosionszeichnung der konstruktiven Ausbildung von Gurtscheibe und Lagerkapsel.
• Figur 2 zeigt die gleichen Teile in zusammengebautem Zustand im Querschnitt.
• Figur 3 zeigt eine Ansicht der Innenseite einer Gurtscheibe, und
• Figur 4 zeigt eine perspektivische Darstellung in auseinandergezogener Form einer Verriegelung des Rolladenpanzers gemäß deutschem Patent 24 37 912.

The invention is explained in more detail below with reference to the drawing, which shows the following:

• Figure 1 shows an exploded perspective view of the structural design of the belt pulley and bearing capsule.
• Figure 2 shows the same parts in the assembled state in cross section.
• Figure 3 shows a view of the inside of a belt pulley, and
• Figure 4 shows an exploded perspective view of a lock of the roller shutter curtain according to German patent 24 37 912.

Fig. 1 shows in detail an exploded view of the construction according to the invention of the roll-in capsule 1 which can be inserted into the roller shutter roller, the locking device, the belt pulley 2 and the axle bearing of the roller shutter on the left-hand side of the figure. The actual axle bearing 11 has a plate which is fastened to the roller shutter box or to the lateral masonry, with a round bearing part for the belt pulley and an adjoining fixed square bolt, the end of which is again designed as a round cylinder. To the right of it is a detail of the belt pulley, which has the known embodiment of a U-shaped profile for receiving the roller shutter belt and on one side has a side web 2a which is smaller in circumference than the belt pulley. (Not recognizable in FIG. 1 because of the perspective representation.) In the assembled state, the belt pulley is seated on the cylindrical bearing part of the axle bearing 11. In addition to the belt pulley, the toothed wheel 5 is shown, which in the assembled state is firmly seated on the bearing pin 8 and in this embodiment serves as an abutment for the locking lever 6. In a simplified version, the rocker arm acts directly on the bolt 8 in order to effect the locking. The bolt then has a correspondingly designed engagement option, for example a groove. The locking lever 6 is designed as a two-armed rocker arm, one lever arm for engagement with the tine wheel 5 has a corresponding prong-shaped tip and the other lever arm is designed such that it projects through the openings 3 in the side webs 1a and 2a. The fulcrum for the locking lever 6 is the pin 7, which is attached to the disk of the capsule sleeve 10, but is shown separately in the figure. In the middle of FIG. 1, the actual pivot bearing 9 is shown, which in the assembled state is seated in the capsule sleeve 10 of the roller insertion capsule 1. The roller insert capsule 1 has a shaft which is inserted into the roller shutter shaft, followed by a capsule sleeve 10 for receiving the rotary bearing 9. On the face of the disc, the annular side web 1a with the two openings 3 is attached to the edge. The diameter of the side web 1a is larger than the diameter of the side web 2a of the belt pulley 2 and, in the installed state, coaxially encompasses the side web 2a. But it is also possible to reverse the size of the diameter, d. H. that 1a is smaller than 2a and is encompassed by the latter. The spring 4 is seated on the pin 12, which is arranged in a corresponding hole in the disc of the roller insertion capsule 1 in the assembled state.

It is also possible, for example, to replace the toothed wheel 5 with an internal toothed ring which is non-positively arranged on the axle bearing 11, into which a correspondingly arranged locking lever 6 then engages in order to effect the locking.

Fig. 2 shows a cross section through the inventive design of the belt pulley 2, axle bearing 11 and roller insert capsule 1 in the assembled state. From the axle bearing 11, the bolt 8, on which the toothed wheel 5 is seated, extends with the cylindrical end part of the bolt into the sleeve part of Roller insert capsule 1.

The rotary bearing 9 is seated on the cylindrical end part of the bolt 8, but has been omitted in the present case for the sake of clarity, but is normally arranged in the capsule sleeve 10. The belt pulley 2 adjoins the axle bearing 11 with the side web 2a, which is coaxially enclosed by the side web 1a of the roller insertion capsule 1. On the pin 7 sits the locking lever 6, which extends through the openings 3 in the side webs 1a and 2a and thereby establishes the non-positive connection between the belt pulley and roller insert capsule.

Fig. 3 shows the belt pulley 2 already shown in Fig. 1 from the other side, so that. the arrangement of the side web 2a with the opening 3 can be seen.

Fig. 4 shows a device for locking the roller shutter with a fold-out jacket, which comes into engagement with the roller shutter, not shown, and brings about a locking according to the procedure described in German Patent 2437912. The illustrated embodiment of the casing device is in this case via the roller shutter shaft 13, which is provided for engagement with the cylindrical part of the roller insertion capsule 1. The roller shutter shaft has the casing 14, which consists of several segments, in which case the segment 20 is fixed and the segment 21 can be folded out. Instead of one segment 21 that can be folded out, several segments can also be folded out. The roller shutter armor, which is not shown here, adjoins the fold-out segment 21. When the roller shutter curtain is pulled up, the fold-out segments of the casing 14 lie in a circle. When the roller shutter curtain is lowered, these segments are preferably unfolded at an obtuse angle, which increases the radius of the casing and the outermost segment comes into engagement with the roller shutter curtain.

The double locking of the lowered roller shutter armor via the roller shutter shaft and jacket of the roller shutter shaft to lock the actual armor offers particularly good protection against the roller shutter armature being pushed up from the outside.

The automatic securing of the roller shutter shaft according to the invention consists of simple and inexpensive parts that can be easily installed. Common high-strength materials such as steel, aluminum alloys or plastics are used to manufacture these parts. The design and arrangement of the belt pulley according to the invention has the particular advantage that the belt pulley width and belt pulley diameter can be selected in accordance with the special requirements and, in principle, all common sizes of known belt pulleys can be provided with the additional side web, so that the device according to the invention for roller shutters and roller shutters of different embodiments is usable.

Claims (6)

1. Automatic means for securing a roller shutter against unauthorised sliding up from outside, by means of a locking device which, after the roller-shutter shield has been let down, is moved into its locking position, characterised in that

a) there are provided a lateral axial bearing with a round bearing part (11) for a belt pulley (2) and, adjoined thereto, a stationary square bearing pin (8) whose end again takes the form of a round cylinder ;

b) the belt pulley (2) has an annular lateral web (2a) and the cylinder insert capsule (1) has an annular lateral web (1a), the lateral webs (1a, 2a) being of different diameter and engaging coaxially into one another and each having corresponding openings (3) of different width, through which a locking lever (6) pivoted on the cylinder insert capsule (1) engages in force- locking manner ;

c) when the roller-shutter shield has been let down, the pivotable locking lever (6) comes into engagement with a locking element arranged on the bearing pin (8) which is stationary relative to the axis of rotation of the roller-shutter shield.

2. Securing means according to Claim 1, characterised in that the locking lever (6) comes into engagement with a toothed wheel (5) arranged on the stationary bearing pin (8).

3. Securing means according to Claim 1 or Claim 2, characterised in that the pivotable locking lever (6) is brought into engagement with the stationary toothed wheel (5) by a spring (4) provided in or on the cylinder insert capsule (1).

4. Securing means according to Claim 3, characterised in that the spring (4) is a leaf spring which is mounted on a pin (12), arranged parallel to the axis of rotation and provided in the cylinder insert capsule (1), and which acts on the locking lever (6).

5. Securing means according to Claims 1 to 4, characterised in that the pivotable locking lever (6) is designed as a rocker arm and is mounted on a pin (7), arranged parallel to the axis of rotation of the roller-shutter shield and provided in the insert capsule (1), and engages in openings (3) of the annular lateral webs (1a, 2a) of the belt pulley (2) and of the cylinder insert capsule (1).

6. Securing means according to Claims 1 to 5, characterised in that the cylinder insert capsule (1) is designed as a pivot bearing for the roller-shutter shaft.

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