Patent Application
20120247692
The present invention relates to a device with elastic deformation for retaining a flexible curtain of a vertically-opening goods-handling door.
At the present time, rapidly vertically-opening flexible doors are known that comprise means for retaining the screen or the flexible curtain which means consist of stiffeners or of semirigid steel or composite transverse bars arranged at regular intervals over the entire height of the screen or of the flexible curtain.
The stiffeners or semirigid steel or composite transverse bars are generally arranged inside sheaths formed within the thickness of the screen or of the flexible curtain.
The stiffeners or semirigid steel or composite transverse bars are guided at each end in the vertical uprights of the goods-handling door in order to guide and retain the screen or the flexible curtain in the region that is to be closed off between a closed position and an open position.
The entirely relative flexibility of the stiffeners or of the semirigid steel or composite transverse bars and/or the flexibility of the guides secured to the vertical and lateral uprights allow the screen or the flexible curtain to unhinge or leave the guides and/or to leave the vertical and lateral uprights when an excessive external force is applied to one of said sides of said screen or of said flexible curtain.
There are numerous things that can cause this force, but the main causes are raised pressure due to the wind or a collision with a body passing through the opening (forklift trucks, vehicle, etc.). Unhinging affords protection to the elements that make up the goods-handling door, namely the vertical uprights and/or the screen or flexible curtain.
The elastic retaining device according to the present invention is aimed at replacing the stiffeners or semirigid or flexible transverse bars with elastic elements which, on the one hand, allow the screen or the flexible curtain to be kept in its movement path between an open position and a closed position and, on the other hand, in the event of an anomaly, allow the screen or the flexible curtain to deform without the risk of said screen or of said flexible curtain becoming unhinged or ejected from the guides secured to the lateral uprights of the goods-handling door and to revert to its initial shape after the anomaly has disappeared.
Thus, the vertically-opening goods-handling door comprising a screen or flexible curtain according to the present invention comprises an elastic retaining device which consists of retaining means which, on the one hand, allow the screen or the flexible curtain to be kept in a movement path between an open position and a closed position and, on the other hand, in the event of an anomaly, allow the screen or the flexible curtain to deform elastically without the risk of said screen or of said flexible curtain becoming unhinged or ejected from the lateral uprights and to revert to its initial shape after the anomaly has disappeared.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device of which the retaining means consist of anchoring elements able to move in a vertical direction inside a profile formed in the lateral and vertical uprights and of flexible and elastic elements housed inside sheaths arranged within the thickness of the screen or of the flexible curtain and at regular intervals along the entire height thereof.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device of which each anchoring element comprises a first part of a shape that complements the internal shape of the profile secured to the vertical uprights so as to provide said anchoring element with vertical guidance, and a second part allowing the corresponding flexible and elastic element to pass and/or retaining it.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device of which the second part of each anchoring element is provided on the one hand in the continuation of the first part and on the other hand pierced with a bore for the free passage of the corresponding flexible and elastic element, and in that each flexible and elastic element consists of an elastic tie with a discontinuous profile, of which each end is fixed, after having passed through the bore, to the screen or flexible curtain at the lateral edges thereof.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device of which the end of each elastic tie is fixed to the screen or the flexible curtain by knitting, bonding, welding or riveting.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device of which each anchoring element comprises a first part having an external profile intended to provide guidance inside the internal profile secured to the vertical uprights and a second part consisting of an internal bore passing right through said first part and inside which the free end of an elastic tie that forms the flexible and elastic element is immobilized.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device of which the elastic tie is fixed inside the anchoring element by means of a binding screw screwed into the first part and emerging at right angles inside the bore of the second part in order to lock the free end of the elastic tie inside said bore.
The vertically-opening goods-handling door according to the present invention comprises an elastic retaining device comprising a protective end stop which is positioned on the elastic tie and on the screen or flexible curtain between the anchoring element and the corresponding lateral edge of said screen or said flexible curtain.
The vertically-opening goods-handling door according to the present invention comprises retaining means comprising, around the elastic tie and between the anchoring elements positioned inside the rails of each vertical upright, an arrangement of tubes or spacer pieces and of spherical olives allowing said elastic tie to be tensioned while at the same time ensuring that said anchoring elements have a functional clearance inside said rails.
The vertically-opening goods-handling door according to the present invention comprises retaining means of which the tubes or spacer pieces and the spherical olives have the elastic tie passing through them so that between each tube or spacer piece is positioned a spherical olive providing the deformable connection between each of said tubes or spacer pieces.
The vertically-opening goods-handling door according to the present invention comprises an elastic tie that has a round or flat external profile.
The following description of the attached drawings, which are given by way of nonlimiting examples, will provide a better understanding of the invention, of its features and of the advantages it is likely to afford:
The stiffeners or semirigid steel or composite transverse bars 3 are generally arranged inside sheaths 4 formed within the thickness of the screen or of the flexible curtain 2.
The stiffeners or semirigid steel or composite transverse bars 3 are guided at each end in the vertical uprights 5, 6 of the goods-handling door 1 to guide and retain the screen or the flexible curtain 2 in the region that is to be closed off between a closed position and an open position.
The entirely relative flexibility of the stiffeners or semirigid steel or composite transverse bars 3 and/or the flexibility of the guides secured to the vertical and lateral uprights 5, 6 allow the screen or the flexible curtain 2 to unhinge or leave the guides and/or the vertical and lateral uprights 5, 6 when an excessive external force is applied to one of said sides of said screen or of said flexible curtain 2.
There are numerous things that can cause this force, but the main causes are raised pressure due to the wind or a collision with a body passing through the opening (forklift trucks, vehicle, etc.). Unhinging affords protection to the elements that make up the goods-handling door 1, namely the vertical uprights 5, 6 and/or the screen or flexible curtain 2.
The elastic retaining device 10 according to the present consists of retaining means 11 which, on the one hand, allow the screen or the flexible curtain 12 of the goods-handling door 100 to be kept in a movement path between an open position and a closed position and, on the other hand, in the event of an anomaly, allow the screen or the flexible curtain 12 to deform elastically without the risk of said screen or of said flexible curtain becoming unhinged or ejected from the lateral uprights 13, 14 of the goods-handling door 100.
The retaining means 11 consist of anchoring elements 15 that can move in a vertical direction inside a profile 16 formed in the lateral and vertical uprights 13, 14 of the goods-handling door 100 and of flexible and elastic elements 17 housed inside sheaths 18 arranged within the thickness of the screen or of the flexible curtain 12 and at regular intervals along the entire height thereof.
Each anchoring element 15 comprises a first part 15a of a shape that complements the internal shape of the profile 16 secured to the vertical uprights 13, 14 so as to provide the anchoring element 15 with vertical guidance, and a second part 15b allowing the corresponding flexible and elastic element 17 to pass and/or retaining it.
For this purpose, each flexible and elastic element 17 consists of an elastic tie having an external profile that may be flat or round and of which each end 17a is secured, after having passed through the bore 15c formed in the second part 15b of the anchoring element 15, to the screen or to the flexible curtain 12 at the lateral edges 12a thereof.
The end 17a of the elastic tie 17 is fixed to the screen or the flexible curtain 12 for example by knitting, bonding, welding or riveting.
In this exemplary embodiment, it may be noted that the profile of the anchoring element 15 and more particularly of the second part 15b allows each continuous vertical and lateral edge 12a of the screen or of the flexible curtain 12 to be held outside the guide profile 16 secured to the vertical uprights 13, 14.
The anchoring element 15 comprises a first part 15a that has an external profile intended to provide guidance inside the internal profile 16 secured to the vertical uprights 13, 14 and a second part 15b consisting of an internal bore 15d passing right through the first part 15a and inside which the free end 17a of the elastic tie 17 is immobilized.
The elastic tie 17 is inset inside the anchoring element 15 and fixed there, for example, using a binding screw, not depicted, which is screwed into the first part 15a and emerges at right angles inside the bore 15d of the second part 15b in order to lock the free end 17a of the elastic tie 17 inside said bore.
The tie 17 may be fixed inside the anchoring element 15 by any other means without that altering the subject matter of the present invention.
The anchoring elements 15 arranged at each end of each tie 17 may be associated with a protective end stop 19 which is positioned at the elastic tie 17 and on the screen or flexible curtain 12 between the anchoring element 15 and the corresponding lateral edge 12a of said screen or of said flexible curtain.
Each end stop 19 prevents the lateral edges 12a of the screen or of the flexible curtain 12 from coming into contact with the edge of the corresponding vertical upright 13, 14 of the goods-handling door 100.
Each protective end stop 19 has the corresponding elastic tie 17 passing through it in a region where this tie is free, that is to say in a region where the elastic tie 17 emerges from the sheath 18 of the screen or of the flexible curtain 12 and before its end 17a is fixed either inside the anchoring element 15 or to said curtain.
In this way, the elastic retaining device 10 according to the present invention as illustrated earlier is capable of holding the screen or the flexible curtain 12 inside the uprights 13, 14 as it moves between an open position and a closed position and, in the event of an anomaly (an external impact or raised pressure), of allowing said screen or said flexible curtain 12 to deform, thanks to the elasticity of the tie 17, without leaving its guides or the anchoring element 15 and to do so until such time as this operational anomaly disappears, then allowing said screen or said curtain to revert to its initial shape.
To do that, the retaining means 11 consist, around the elastic tie 17 and between the anchoring elements 15 positioned inside the rails 16 of each vertical upright 13, 14, of an arrangement of tubes or spacer pieces 20 and of spherical olives 21.
The tubes or spacer pieces 20 and the spherical olives 21 have the elastic tie 17 passing through them so that between each tube or spacer piece 20 is positioned a spherical olive 21 providing the deformable connection between each of said tubes or spacer pieces.
This arrangement of tubes 20 and of spherical olives 21 around the elastic tie 17 allows the latter to be prestressed in tension between the anchoring elements 15 held in the rails of the uprights 13, 14.
This prestressing tension of the elastic tie 17 inside the sheaths 18 of the screen or of the flexible curtain 12 makes it possible to ensure that the anchoring elements 15 have a functional clearance inside the rails of each upright 13, 14 of the goods-handling door 100.
Likewise, this prestressing tension of the elastic tie 17 ensures that the screen or flexible curtain 12 has a certain rigidity ensuring that it behaves correctly as it moves between an open position and a closed position.
The arrangement of the tubes or spacer pieces 20 and of the spherical olives 21 around the elastic tie 17 constitutes, along the latter, deformable segments at each spherical olive 21 allowing the arrangement to conform to the deformation of the screen or of the flexible curtain 12 and therefore of the elastic tie 17 when an external force is applied to said screen or flexible curtain.
It must moreover be understood that the foregoing description has been given merely by way of example and that it does not in any way restrict the field of the invention and that replacing the embodiment details described by any other equivalent details would not constitute a departure from the scope of the invention.
| Number | Date | Country | |
|---|---|---|---|
| 61470643 | Apr 2011 | US |
