Abstract: A goods-handling door for opening and closing a bay in a wall, the door including a flexible curtain (1), said bay being closed off when the curtain is deployed, and open when the curtain is gathered up on an edge of the bay, the door including a rolling-up shaft on said edge of the bay for receiving said curtain, or straps serving to displace said curtain by folding it up, the rolling-up shaft being rotated by an electric motor, said curtain having an edge fixed to said shaft or in the vicinity of said shaft, and a displaceable free opposite edge, said door being characterized in that it includes a safety system including firstly at least one elongate element such as a strap that can be rolled up with the curtain or with the straps on said rolling-up shaft while one end of said strap is fixed substantially to the free edge of the curtain, and secondly signal-emitting means for emitting a signal when the tension of the strap (10) drops below a predetermined threshold.

Abstract: A fast-opening and fast-closing goods-handling door for allowing vehicles to pass therethrough includes a foldable or rollable flexible curtain, the edges of which are guided in respective slideways, and which are retained therein by means of retaining carriages guided by rails received in the slideways. The carriages are not able to leave the rails. The goods-handling door is further characterized in that it includes a coupling device for coupling the curtain to the carriages, and at least one stress-distribution device for distributing the stresses exerted on the edges of the curtain by the carriages when the door is subjected to detrimental forces.

Abstract: A safety device used in case of rupture of a rotary shaft for preventing the shaft from rotating and for preventing broken portions thereof from falling, includes at least one safety element placed so as to retain the shaft to prevent it from falling. The peripheral surface of the shaft and a facing surface of the safety element are provided with mating devices that cooperate to prevent the shaft from rotating when a portion of the shaft is retained by said safety element due to the shaft rupturing. The device is particularly suitable for use with a shaft that winds up lifting straps for a raisable curtain or that winds up the curtain itself.

Abstract: A fast-opening and fast-closing goods-handling door for allowing vehicles to pass therethrough includes a foldable or rollable flexible curtain, the edges of which are guided in respective slideways, and which are retained therein by means of retaining carriages guided by rails received in the slideways. According to one aspect of the goods-handling door, the carriages are able to leave the rails. The goods-handling door is further characterized in that it includes a coupling device for coupling the curtain to the carriages, and at least one stress-distribution device for distributing the stresses exerted on the edges of the curtain by the carriages when the door is subjected to detrimental forces.

Abstract: A raisable goods-handling door of the type includes a flexible curtain capable of being wound up or of being folded up in the top portion of the door, said curtain being reinforced by at least one reinforcing or loading bar, the door being wherein the bar is made up of two half-bars that are disposed at the same level on the two faces of the curtain and, clamping provided so that the two edges of each half-bar are pressed against the curtain in sealed manner, thereby preventing dust or dirt from penetrating between either half-bar and the corresponding face of the curtain.

Abstract: A raisable-curtain door for closing a door-bay through a wall between two volumes of air maintained at different temperatures includes two vertical side uprights, each of which forms a slideway delimited by two vertical edges and a raisable curtain having side portions that slide in the slideways. Each of the side uprights includes two vertical metal bars forming respective edges of the slideway, which bars are separated from each other so as to define the associated slideway over substantially the entire height of the upright. A first of the vertical bars is located closer to the wall than the second of the vertical bars. The first bar is in draft-proof contact with the wall and in substantially draft-proof contact with the curtain over the entire height of the curtain when the curtain is down.

Abstract: A goods-handling door having a retractable curtain includes a flexible curtain that is rollable or foldable by use of a rotary winding shaft. In the door, the curtain is provided, on at least one face, with at least one flexible strip extending perpendicular to the shaft and forming excess thickness on the curtain. When the curtain is rolled or folded in its retracted position, the separation strip rolls or folds onto itself to hold the layers of the curtain apart from one another.

Abstract: A balancing apparatus for a raisable-curtain goods-handling door includes a shaft on which a curtain is wound up or on which curtain-raising straps are wound up. The shaft supports two drums onto which are wound belts from which two counterweights are suspended. The "long" belt from which a "long" counterweight of "long" mass M.sub.6 is suspended has a length that corresponds to the full stroke of the curtain while the "short" belt of the "short" other counterweight of "short" mass M.sub.5 is shorter and is fastened on the corresponding drum in such a manner as to enable it to wind in either direction on the drum.

Abstract: A goods-handling door for separating different spaces in factories or warehouses includes a curtain that can be raised by being wound up or by being folded up concertina-like. The curtain is insulating both with respect to heat and with respect to noise, while being transparent so that one vehicle can be seen by another if they approach the door from opposite sides. The door includes two airtight flexible skins that lie parallel to each other and that sandwich spreaders between them. The spreaders are spaced apart and define intermediate spaces between the two skins. The spaces are filled with air, which provides the required insulation. Since the two skins are transparent, the door is transparent in the vicinity of the intermediate spaces.

Abstract: A goods-handling door having a raisable curtain for closing a door-bay, the door including two rigid side uprights disposed on either side of the door-bay, each upright including a slideway, the door further including a curtain disposed between the uprights, the vertical edges of the curtain sliding in respective ones of the slideways, each upright including a rigid web that faces said door-bay, each slideway including a vertical slot formed through said rigid web, said vertical slot being delimited by two edges, wherein each slideway further includes a flexible draft-proofing cloth interconnecting its two edges over substantially the entire height of the slot, thereby delimiting a vertical pocket on its side opposite from the door-bay, which pocket is designed to receive an edge of the curtain, said edge bearing flexibly against the bottom of the pocket, which bottom has sufficient clearance to absorb movements and deformations of the edge of the curtain.

Abstract: A vertically-opening door installation which is exposed to cold on one side includes a vertically-opening flexible curtain (6) and two risers to guide the respective side edges of the curtain. Each riser includes a lining (12) made of a material which is a poor conductor of heat and which lines the inside of the channel section bar, and at least one longitudinally-extending cavity (14) providing a cushion of air between the outside surface of the channel section bar and the inside surface of its lining. The inside surface of lining (12) is smooth. At least one of the longitudinally-extending cavities (14) may include electrical heater resistance (15) or similar heating devices. The riser is provided to prevent frost and ice from forming around the side edges of the curtain of a goods-handling door which is exposed to the cold.

Abstract: A lifting curtain industrial door including a flexible curtain capable of being gathered together at the top of the door by being rolled up or folded, and of being lowered in a plane between two vertical side uprights each including a slideway, each slideway having a guide wall on either side of the plane of the curtain, the curtain having lateral portions which slide in said slideways, said lateral portions being adapted to escape from the slideways in the event of an abnormal transverse force, wherein the wall of the upright including the slideway includes at least one moving wall element capable of deforming elastically so as to form a path enabling a lateral portion of the curtain to pass from the outside to the inside of the slideway, but not in the opposite direction.

Abstract: A vertically-raisable door for industrial use includes a curtain 4 reinforced by bars 5 whose ends are guided in slideways, each comprising a web 7 and two guide walls 8, 9. The width of each slideway is reduced at its bottom end by a filler component 20 received inside the slideway against the web and a guide wall. The filler component has a clearance surface 23 facing the bay, and a ramp comprising an upper guide surface 21 and a placement surface 24 facing the opposite guide wall. The clearance surface slopes from the bottom towards the web of the slideway at an angle lying in the range about 1.degree. to about 10.degree., and preferably in the range 2.degree. to 5.degree., such that the horizontal distance between the clearance surfaces of the two facing slideways increases going upwards.

Abstract: A goods-handling door of the type comprising a raisable curtain constituted by a flexible curtain having horizontal reinforcing bars disposed at regular intervals, e.g. a roll-up door or a raisable door that folds concertina-like, wherein the lowermost bar is flexible and lighter than the other bars.

Abstract: A sliding skid for the end of a reinforcing bar of a curtain of a raisable-curtain industrial door of the type comprising a curtain and a rigid door frame including two vertical lateral uprights disposed on either side of the door, forming or containing slideways, and interconnected at their top ends by a horizontal cross-member, said curtain being capable of being lowered or raised between the uprights to be collected together at the top of the door, and being reinforced by equidistant horizontal reinforcing bars, the edges of the curtain and the ends of the reinforcing bars sliding in the slideways, the bars being disposed in sheaths formed by localized double thicknesses of the curtain, wherein the skid is generally semi-cylindrical in shape, having fixing means for fixing to the curtain, and having a radial finger at one of its ends for being engaged through a slot in the sheath of the curtain to limit displacement of a reinforcing bar whose end may come into abutment against said finger.

Abstract: A sealing device for a raisable-curtain warehouse door, the door comprising a curtain and a rigid frame having two vertical lateral uprights, 1,2 interconnected at their top ends by a downwardly-open channel-section cross-member 3 having a web 4, and two flanges, 5,6 and housing mechanical members for operating the curtain, the curtain being capable of being lowered or raised between the uprights. The highest portion of the curtain is situated at a certain distance below the web of the cross-member, below any mechanical members that may be below the cross-member, and a cover, 15;35 having two parallel longitudinal edges, namely a top edge and a bottom edge, is fastened via its top edge to the bottom edge of one of the flanges of the cross-member, and is maintained in an orientation such that its bottom edge is placed against the top portion of the curtain so as to provide continuous closure between the cross-member and the curtain.

Abstract: A goods-handling door constituted by rigid panels connected to reinforcing bars, at least some of which extend into slideways, wherein each panel is constituted by two parallel rails disposed in the vicinity of its longitudinally-extending sides, each rail having fixing means on two opposite longitudinal edges thereof enabling it to be fixed on one edge to connection means for connection with a reinforcing bar and on the opposite edge to at least two spacers for interconnecting the two rails of the panel, with the area between the rails being filled by rigid filler plates.

Abstract: A lifting curtain door comprising a frame constituted by two vertical side uprights interconnected at their top ends by a cross member, the side uprights each constituting or including a slideway, each slideway having a guide wall on either side of the plane of the curtain, which curtain may be gathered together at the top of the door by being rolled up or folded, the curtain being reinforced by horizontal bars whose ends slide in the slideways. At least one of the bars has sufficient flexibility at least one portion of its length to enable it to escape from at least one of the slideways in the event of an abnormal transverse force being applied to the bar, without the bar being deformed permanently which could impede subsequent operation of the curtain.

Abstract: A goods-handling door of the raisable type, the door comprising a flexible or hinged curtain, optionally having horizontal reinforcing bars and capable of being wound, folded concertina-like, or displaced above the door, the edges of the curtain sliding between the side walls of vertical slideways which are spaced substantially further apart than the thickness of the curtain, or of the reinforcing bars, if any, with thrust means being provided in each slideway for thrusting the edge of the curtain against one of the side walls of the slideway. Each thrust means is constituted by an elongate element, is resiliently held in a horizontal position by a resilient hinge disposed between one of the ends of the thrust means and one of the walls of the slideway, and is shorter than the spacing between the side walls of the slideway so as to leave a gap substantially equal to the thickness of the curtain or to the thickness of a reinforcing bar, if any.

Abstract: A goods-handling door comprises a raisable curtain 1 which folds concertina-like and which is stiffened by reinforcing bars 2 having rings 4 through which lifting straps 3 are passed, which straps are wound onto a top shaft 5. During lifting and while the curtain is folding, it is desirable for the curtain to fold regularly and in a preferred direction. Flexible and inextensible elements 11 are placed between adjacent bars in order to limit the spacing between the bars, and they are given a structure which facilitates folding in the desired direction.