EP1746244B1 - Closure device for openings in buildings - Google Patents

Abstract

At its ends, a winding shaft (1) has retaining units (5) on support units for side support devices. Near one end there is an extractable lengthening piston to support an assigned retaining unit. The piston can be fixed in an axial fixed position.

Description

The invention relates to a device for closing building openings, in particular in the form of a roller shutter.

There are shutters are known in which the winding shaft is rigid in length and has a fixed bearing distance. This requires a high manufacturing accuracy and complicates the assembly.

The German Utility Model DE 7017601 U discloses a roller shutter with a winding shaft on which an extension piston is fixable via a screw in different axial positions.

Arrangements of the type mentioned above are also known in which the winding shaft is provided with an extension piston which can be pushed out by the action of a push-out spring and which contains a bearing arrangement. A blockage of the extension piston is not possible. This is prevented solely by the force of the Ausschubfeder at a return movement. However, there is a risk that in the case of greater axial forces, the force of the Ausschubfeder is overcome, so that the winding shaft can jump out of their storage. Such axial forces can e.g. occur when the roller shutter is subjected during transport or assembly due to a carelessness of a jerk-braked axial movement.

On this basis, it is therefore the object of the present invention, a device of the type mentioned above while avoiding the disadvantages and maintaining the advantages of the known arrangements with simple and inexpensive means to improve so that a simple assembly and high reliability can be achieved.

This object is solved by the features of claim 1.

This is a device for closing of Building openings, in particular in the form of a shutter in proposal, the closure member is wound on a winding shaft, which is provided at their ends with supporting organs on lateral support means receiving members, wherein in the region of at least one end of the winding shaft, the associated receiving member bearing, extendable extension piston is provided which is fixable in at least one axial fixed position. The support and receiving organs can each be bearing or journal. According to the invention, the extension piston is accommodated in a bush which can be inserted into the winding shaft and on which a push-out spring assigned to the extension piston is supported. The sleeve including Ausschubfeder and extension piston forms advantageously a preassembled module.

The displaceable Ausschubkolben allows advantageously easy assembly of the inventive device. The fact that the extension piston is fixable, the behavior of a fixed length winding shaft is still achieved, which allows the setting of a desired axial play and prevents unwanted shortening of the winding shaft. With the inventive measures, therefore, the above object is achieved in a very simple and cost-effective manner.

Advantageous embodiments and expedient developments of the higher-level measures are specified in the dependent claims.

Thus, the extension piston can be conveniently fixed in different fixed positions, preferably in at least one or more Ausschubstellungen and an insertion position. As a result, the above advantages are enhanced. The fixation in the insertion position results in a special simplification of the assembly. The possibility of fixing in several Ausschubstellungen allows universal usability of a winding shaft for different bearing distances.

Another advantageous measure may be that everyone axially fixed position of the extension piston is associated with a peripheral notch of the extension piston, and that the extension piston receiving bushing has at least one peripheral window recess, which is durchgreifbar by a bolt of a locking member which engages in brought into an axial fixed position extension piston in this fixed position associated notch. These measures result in a particularly simple yet reliable fixation of the extension piston.

In a further development of the higher-level measures, the locking member may be formed as a U-shaped tab, which is flangeable with the sleeve flanking legs on this and latched thereto. These measures result in a captive attachment of the bolt.

A further advantageous measure may consist in that each Ausgesterbung assigned to a Ausschubstellung the extension piston is associated with a same angle, the insertion position associated notch is assigned, which is coplanar with each other of the insertion position associated notch. These measures allow a particularly simple and obvious handling during assembly.

Further advantageous embodiments and expedient developments of the parent measures are specified in the remaining subclaims and from the following description of the example with reference to the drawing closer.

• Figur 1 : eine Teil-Innenansicht eines Rollladenkastens in explosionsartiger Darstellung,
• Figur 2 : einen Längsschnitt durch einen Endbereich der Wickelwelle der Anordnung gemäss Figur 1 in einer ausgeschobenen Fixstellung,
• Figur 3 : die Anordnung gemäss Figur 2 in einer eingeschobenen Fixstellung,
• Figur 4 eine einen Verlängerungskolben enthaltende Baugruppe in explosionsartiger Darstellung,
• Figur 5 eine Ansicht des Verriegelungsorgans der Anordnung gemäss Figuren 2 bis 4, und
• Figur 6 : eine abweichende Gestaltung des Verriegelungsorgans.

In the drawing described below:

• FIG. 1 : a partial interior view of a roller shutter box in an explosive representation,
• FIG. 2 a longitudinal section through an end portion of the winding shaft of the arrangement according to FIG. 1 in an ejected fixed position,
• FIG. 3 : the arrangement according to FIG. 2 in an inserted fixed position,
• FIG. 4 an assembly containing an extension piston in explosive representation,
• FIG. 5 a view of the locking member of the arrangement according to FIGS. 2 to 4 , and
• FIG. 6 : a different design of the locking member.

The structure and operation of shutters are known per se and therefore need no further explanation in the present context. A roller shutter contains a functioning as a closing organ, formed by articulated lamellae tanks, with its upper end to an in FIG. 1 recognizable winding shaft 1 is mounted, which is arranged in a roller shutter box, which is provided with lateral support means with support members for supporting the winding shaft 1. The illustrated example is based on a roller shutter box, which is laterally limited by lateral caps 2, which may be bridged by shrouds not shown. The visor caps 2 form the support means on which the winding shaft 1 is supported with their ends. From FIG. 1 Removable Blendkappe 2 is this purpose associated with one of the winding shaft 1, here acting as a support member bearing pin 3, on which the associated end of the winding shaft 1 with a suitable, acting here as a receiving organ bearing is receivable. Of course, the winding shaft 1 could be provided with journals and the lateral support means associated with these camps.

The winding shaft 1 includes a central portion 4 formed by a polygonal pipe section, which is provided at its ends with receiving means 5. At least at one end, that in FIG. 1 is shown, the receiving device 5, as from the FIGS. 2 to 4 can be seen, provided with a displaceable in the axial direction extension piston 6, which carries an associated receiving member, here in the form of a bearing 7. This is formed in the example shown as a rolling bearing, which, as best of FIG. 4 it can be seen, is inserted into a collar 8 of the extension piston 6, the bearing 7 associated with axial stops 9 has.

For receiving the extension piston 6, a sleeve 10 is provided, which is insertable into the central portion 4 of the winding shaft 1. Appropriately, a press fit is provided. To facilitate the assembly of the sleeve 10 may be provided with circumferential ribs 11, the front end in the insertion direction is tapered wedge-shaped. The sleeve 10 is at its inner end, like the FIGS. 2 and 3 show, connected via an annular web 12 with an inner sleeve 13, in which a pin 14 of the extension piston 6 engages. The inner end portion of this pin 14 is formed by spring tabs 15 which are provided with radial projections 16. The inner sleeve 13 is provided with slots 17 in which the radial projections 16 engage. The slots 17 do not go to the free end of the inner sleeve 13. The end of the slots 17 accordingly forms the radial projections 16 associated attacks, which prevent the extension piston 6 can be completely moved out of the sleeve 10. The resilient property of the spring tabs 15 still allows easy installation of the extension piston. 6

In the example shown, the extension piston 6 is assigned a Ausschubfeder 18. This comprises the inner sleeve 13 and is supported on the one hand on the bushing side web 12 and on the other hand on a piston-side pin 14 surrounding the piston-side support surface 19 from. The extension piston 6 is acted upon by the Ausschubfeder 18 in the extension direction, which counteracts an insertion movement. It would also be conceivable to manually move the extension piston 6 both in the extension direction and in the direction of insertion.

The extension piston 6 can be fixed in at least one, preferably in a plurality of axial fixed positions. In the example shown, the extension piston 6 can be fixed in two different Ausschubstellungen and in an insertion position. Of the FIG. 2 is based on a Ausschubstellung, the FIG. 3 shows the insertion position. The extension piston 6 has, like the FIGS. 2 to 4 show, each axial fixed position in which it is fixable, respectively associated, circumferential notches 20, 21, in each of which a bolt 22nd an attachable to the sleeve 10 locking member 23 can be brought into engagement. The notches, 20, 21 can be easily formed by circumferential grooves or preferably circumferential cuts, which only partially circulate.

The locking member 23 is preferably like the FIGS. 4 and recognize the following, designed as a U-shaped rider, which is flangeable with the sleeve 10 flanking legs on this and latched thereto. The sleeve 10 may conveniently be provided with the legs of the locking member 23 associated circumferential grooves 24, which may be advantageously overlapped by a web 25, so that there is a pocket, in which the respectively associated leg of the U-shaped locking member 23 is inserted ,

In which the FIG. 4 Underlying example, a wall 10 of the sleeve 10 penetrating window recess 26 is provided in the region of a circumferential groove 24. The associated leg of the U-shaped locking member 23 is provided with a latch 22 forming the radial projection which passes through the window recess 26 in the plugged state and placed in a desired axial fixed position extension piston 6 in the respective fixed position associated, circumferential notch 20th or 21 can be brought to the intervention. For locking the locking member 23, the latch 22, as shown FIG. 5 can be seen, provided with a snap-in notch 27a provided in a latching projection, which is not shown in the box or piston side. Additionally or alternatively, at least one leg in FIG. 5 in that the limb 22 opposite legs are provided with a latchable under the associated spring claw 25 latching tooth 27 b. Conveniently, however, can be provided in the region of each leg of the locking member 23 a rest facility.

The locking member 23 are associated with release means which facilitate removal from the sleeve 10. For this purpose, a handle may be provided. In the in the FIGS. 4 and 5 the locking member 23 is provided with a provided in the region of its upper yoke, inwardly open groove 28 for insertion of a tool, such as a screwdriver, provided. Additionally or alternatively, the sleeve 10 with a suitable, from FIG. 4 apparent groove 28b be provided.

The extension piston 6 can, as out FIG. 4 can be seen, a plurality of different axial fixed positions associated peripheral notches 20 and 21 have. The notches 20 are each a Ausschubstellung, the notches 21 associated with the insertion position. In the example shown, two different Ausschubstellungen assigned, in the axial direction by the distance a staggered notches 20 are provided in the circumferential direction by an angle of 90 ° here. offset from each other. For each associated with a Ausschubstellung notch 20 includes an offset in the axial direction by an equal amount, circumferentially equiangularly arranged, the insertion position associated notch 21. Accordingly, in the illustrated example, two in the circumferential direction by 90 deg. staggered, the insertion position associated notches 21 provided. These are not offset from each other in the axial direction, but arranged coplanar with each other. Characterized in that each notch 20 is associated with a same angle notch 21, it is achieved that the Ausschubkolben between the insertion position and the selected Ausschubstellung does not have to be rotated, which facilitates handling.

At the in FIG. 6 illustrated example of a locking of the extension piston 6 is also designed as a U-shaped rider, as a whole with 23 designated locking member is provided, whose legs engage in circumferential grooves 24 of the sleeve 10. The lower ends of the two legs of the U-shaped locking member 23 are provided with outwardly directed locking teeth 27c, each of which engage under a web 25a forming an insertion pocket. That the FIG. 6 underlying locking member 23 is in the region of its legs connecting Yoke 30 is provided with a latch 31 which projects radially with respect to the piston axis. The bush 10 here contains a yoke 30 associated with the window recess 26 through which the bolt 31 can reach through. In the FIG. 6 underlying fixing position of the latch 31 forming projection engages through the window recess 26 and in a hereby brought to coincide, circumferential notch, for example, 20, the extension piston 6 a.

The locking member 23 forming, U-shaped tab has in the example shown a stretchable by train configuration. For this purpose, at least the lateral limbs are provided with an extension clasp 32 bulging in relation to a tangential direction with respect to the extension piston 6 or the bush 10. In the case of a tensile load in the thigh direction, he then wants, as in FIG. 6 indicated by broken lines, reduces the bulge and increased the leg length. In the case of a train in the radial direction, the U-shaped locking member 23 is supported with its locking teeth 27c on the sleeve-side webs 25a. The mentioned extension accordingly leads to a stroke of the yoke 30 and, accordingly, of the bolt 31, as indicated by broken lines. The possible by said extension stroke of the bolt 31 corresponds at least to the depth of engagement of the bolt 31 in one of the notches 20, 21 of the sleeve 10th

In this way it is possible here to bring the latch 31 out of engagement with the notch 20 and 21 of the extension piston 6, that is to unlock them without having to remove the locking member 23 forming U-shaped tabs from the sleeve 10. This can always remain on the sleeve 10. For lifting the yoke 30, ie for applying the required train, suitable release means are provided. For this purpose, the yoke 30 may be provided with a handle. In the example shown, a channel 33 is provided for inserting a tool, for example a screwdriver. The channel 33 is formed here as a central passageway of the yoke 30 and arranged so that an inserted tool tip on the one hand on the upper boundary of the channel 33 and on the other hand on one of these opposite, circumferential surface 34 of the sleeve 10 is present, which facilitates the achievement of the desired stroke of the yoke 30. As soon as the force acting in the direction of stretch is eliminated, the U-shaped tab forming the locking member 23 springs back into its original position due to its inherent elasticity.

The practical trained in the form of a U-shaped rider locking member 23 may be conveniently prepared as existing plastic injection molding. The same applies to the sleeve 10 and the extension piston. 6

Claims (10)

1. A device for closing the openings in buildings, in particular a roller blind with a closure element which can be wound on a reel shaft (1) which latter is at its ends provided with receiving elements (7) receivable by support members of lateral support devices, comprising in the area of at least one end thereof an extendable extension piston (6) holding the associated receiving element (7) and being fixable in at least one axial fixing position, characterized in that the extension piston (6) is received by a sleeve (10) insertable into the reel shaft (1), such sleeve supporting a push-out spring (18) associated with the extension piston (6), with the said sleeve (10) comprising a slotted inner sleeve (13) embraced by the push-out spring (18), which inner sleeve (13) is engaged by a projecting nose (14) of the extension piston (6) standing out relative to the abutting surface (19) of the extension piston (6) in a direction opposite the push-out direction, such abutting surface being associated with the push-out spring (18), with the extension piston (6) being provided with spring-action tongues (15) having radial projections (16) which engage the slots (17) of the inner sleeve (13).
2. A device in accordance with Claim 1, characterized in that the extension piston (6) is fixable in various fixing positions, preferably in at least one or in several different pushed-out positions, and further in its pushed-in position.
3. A device in accordance with Claim 1 or 2, characterized in that the force of a push-out spring (18), whose end away from the extension piston (6) is supported by the sleeve (10), is exertable in push-out direction on the extension piston (6).
4. A device in accordance with any of the preceding claims, characterized in that associated with each axial fixing position of the extension piston (6) is a circumferential notch (20 or 21, respectively) of the extension piston (6), and that the sleeve (10) receiving the extension piston (6) has at least one circumferential window recess (26) which can be reached through by a latch (22, 31) of a locking element (23), which, when the extension piston (6) is moved into an axial fixing position, can engage the notch (22 or 21, respectively) associated with the said fixing position.
5. A device in accordance with Claim 4, characterized in that the locking element (23) is designed as a U-shaped rider with two lateral legs which can be attached to the sleeve (10) and snapped into engagement therewith, with preferably at least one lateral leg engaging a circumferential groove (24) of the sleeve (10) associated with the window recess (26) and being provided with a radial projection forming the latch (22), and further with the preferably U-shaped rider, forming the locking element (23), which, with its yoke (30) connecting the lateral legs, encompasses the window recess (26) of the sleeve (10), and further with the yoke (30) being provided with a radial projection forming the latch (31), which, extending through the window recess (26), can be brought into engagement with a circumferential notch (20, 21) of the extension piston (6).
6. A device in accordance with Claim 5, characterized in that the U-shaped rider forming the locking element 23 has a configuration which is extendable by tensile force, preferably by an extension element 32 of its lateral legs.
7. A device in accordance with any of the Claims 4 to 6, characterized in that the locking element (23) is provided with an unlocking element (28).
8. A device in accordance with any of the preceding Claims 5 to 7, characterized in that the sleeve (10) is provided with pockets for inserting the lateral legs of the U-shaped locking element (23), with preferably at least one lateral leg of the locking element (23) having the capacity of being snapped into engagement with the associated pocket.
9. A device in accordance with any of the preceding Claims, characterized in that the notches (20) associated with the different pushed-out positions of the extension piston (6) are mutually offset relative to one another by an angle of preferably 90 degrees in a circumferential direction.
10. A device in accordance with Claim 9, characterized in that associated with each notch (20) associated with a pushed-out position of the extension piston (6) is a notch (21) arranged at the same angle and associated with the pushed-in position, and that all notches (21) associated with the pushed-in position are arranged in a coplanar relationship.

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