DE8702763U1 - Anti-displacement protection of roller shutter profile bars - Google Patents

Description

_t ** _{t #} »·12. _t February 1987

HETAL-WERKE FRANZ HETTICH GMBH & CO., 7297 Aipirsbach ^r

Roller shutter with anti-slip protection J

The invention relates to a roller shutter, and preferably to roller shutters for furniture.

Such roller shutters, if they are made of extruded plastics, e.g. PVC, are put together using connecting elements formed on both sides along the longitudinal axis. This creates a mat made up of individual profiles that are connected in the transverse direction, but whose individual rods can be moved in the longitudinal direction of the profiles and can therefore also be lost.

In order to avoid axial displacement of the profile bars, textile tapes or plastic films were previously glued to the inside of the mats that were put together. This was a costly process that also had a number of defects. When the profile bars were cut, differences in length inevitably occurred, i.e. the individual bars were not the same length.

The finished roller shutter now has an uneven running surface, i.e. the ends of the profile bars protrude slightly. In the case of roller shutters with a vertical axis, i.e. horizontal sliding direction, only part of the profiles touch the bottom of the guide groove. In extreme cases, this causes the roller shutter to run unevenly, or at least the protruding profile ends are ground down and the dust impedes the function.

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Another disadvantage is the loud noise caused by the adhesive tape*

As a result of the differences in length, the adhesive tape sticks to the profile joints when rolled in. As the adhesive tape is re-tightened at the transition to the surface, additional noise is generated.

The object of the present invention is to avoid the disadvantages mentioned and to make this type of roller shutter made of plastic profiles cheaper to manufacture, while also ensuring easy, quiet operation.

This goal is achieved by the design measures shown in the following drawings. The adhesive tape, including the gluing process, is no longer required. Even with the finished roller shutter, the individual profiles have a small amount of play in the longitudinal axis. This play is so large that the inaccuracies when cutting the profiles are compensated for and all profiles slide on the groove base when the roller shutter is operated horizontally.

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Two examples are explained below:

illustration 1

The hollow chamber profile 1 has molded connecting elements on both narrow sides I ¹ and 1", on one side a circular

&iacgr; Eye 2, which is connected to the profile body 1 by a web 3.

I den is, on the other narrow side is a circular, the

i Eye 2 corresponding recess formed on. The recess

I / 7» is open to the outside as long as the web 3 has sufficient radial clearance

f after insertion, on the other hand the eye 2 when

> is held securely in the recess^ because of the roller shutter.

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i
j According to the invention, the eye 2 is now disengaged so that an un-

I ' interruption 5 is created. This recess must have approximately the same distance from the profile end for all profiles j. The profile bars

5 to 1 are now put together to the desired mat width.

r using a device, the reeving 6' and ⁶ '

f and the safety tab 7 is simultaneously inserted into the recess

I ung 5 bent. It is important that the securing tab 7 is slightly

{ short a3s the recess 5 is, where the difference from äem

Extent of the manufacturing-related profile length tolerance.

The mat now retains its full flexibility, the individual rods have little play in the longitudinal direction L, but each profile is still secured against falling out and the application of adhesive tape is unnecessary.

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Figure 2

shows the same principle, but here the securing tab 7 is bent out of the inner wall of the profile 1'. This process is more complex in terms of the machine equipment, but has the advantage that it is invisible; the back of the mat remains completely smooth and is not interrupted by notches.

'In both examples shown, the tool required for bending the securing tab 7 can be heated or thermally supported.

Claims (1)

5 - Protection claims Claim 1 Roller shutter, consisting of profile bars put together, which are secured against longitudinal displacement, characterized in that the displacement protection is provided by lateral cams ⁷ and recesses^. Claim 2 Roller shutter according to claim 1, characterized in that a recess is provided on each longitudinal edge with projections, into which cams 'attached' from the corresponding wall ¹ "engage^ Claim 3 Roller shutter according to claim 1+2, characterized in that the molded cams are smaller by a small amount in the longitudinal direction of the profile than the recesses in the corresponding profile. Claim 4 Roller shutter according to claims 1-3, characterized in that each individual profile bar has a recess on one longitudinal edge and a cam on the opposite longitudinal edge, the recess and cam being at the same distance from the profile end. Claim 5 Roller shutter according to claims 1-4, characterized in that the cam-like projections are attached both from the outside to the inside and from the inside to the outside. &Ggr; Claim 6 : I"\ Roller shutter according to claim 1-5, characterized in that the J Cams are manufactured by punching or embossing. Claim 7 Roller shutter according to claims 1-3, characterized in that the mechanical deformation of the cams is thermally supported.