QUICK-ACTION ROLL-UP DOOR

Abstract

A quick-action roll-up door (1) for a cold storage room has a flexible door panel (5), which is windable onto a horizontal shaft (4) in a vertical running direction for purposes of closing a door opening (2) bounded by a door frame (3). A winding drive (6) opens and closes the door, together with a pressure application frame (8), subjecting the door panel in a closing position to force, transverse to a planar face of the door panel, in the direction of the door frame. Furthermore, device features are provided, which apply force to the pressure application frame in the direction of the door frame when the roll-up door is closed, and relieve it when it is opened. The device features have a traction drive (14), which is functionally connected to the winding drive for the door panel, and which controls the movement of the pressure application frame.

Claims

1. A quick-action roll-up door comprising: a flexible door panel, configured to be wound onto a horizontal shaft in a vertical running direction for purposes of closing a door opening bounded by a door frame; a winding drive configured to open and close the door; a pressure application frame configured to subject the door panel, in a door panel closing position, to force, transverse to a planar face of the door panel, in a direction towards the door frame; and a force application means for applying a pressure force to the pressure application frame in the direction of the door frame, when the roll-up door is closed, the force application means comprising a traction drive, which is functionally connected to the winding drive, and which controls movement of the pressure application frame.

2. A quick-action roll-up door according to claim 1, further comprising a spring arrangement configured to force the pressure application frame into a position spaced apart from the door panel.

3. A quick-action roll-up door according to claim 1, wherein, the traction drive comprises two circulating traction elements, which traction elements are arranged vertically and in a region of vertical parts of the pressure application frame, which traction elements, in each case, are driven and controlled by a drive gear seated on the horizontal shaft.

4. A quick-action roll-up door according to claim 1, wherein, the pressure application frame is formed by two vertical pressure application elements.

5. A quick-action roll-up door according to claim 4, wherein the two vertical pressure application elements are configured to be moved independently of each other.

6. A quick-action roll-up door according to claim 1, wherein, the pressure application frame comprises two vertical pressure application elements, which are connected to each other by at least one horizontal element.

7. A quick-action roll-up door according to claim 1, wherein at least one controlling body is attached to each traction element.

8. A quick-action roll-up door according to claim 7, wherein a supporting body, fixed on the door frame, is assigned to each controlling body.

9. A quick-action roll-up door according to claim 1, wherein the at least one a controlling body has a wedge-shaped tip or is of wedge-shaped configuration, wherein the tip or the wedge-shaped configuration is directed downwards.

10. A quick-action roll-up door according to claim 1, wherein a controlling body is configured to be moved along a vertical pressure application element, such that a pressure application force is generated upon the controlling body coming between the pressure application element and a supporting body.

11. A quick-action roll-up door according to claim 1, wherein two or more controlling bodies, arranged in a distributed manner over the vertical length, are provided on each traction element.

12. A quick-action roll-up door according to claim 1, wherein, the traction element is formed by a chain.

13. A quick-action roll-up door according to claim 1, wherein the traction element is formed by a toothed belt.

14. A quick-action roll-up door according to claim 1, wherein a lower deflection roller is provided for each traction element, which is spring-loaded downwards in the direction of force, and which is mounted on the door frame such that the lower deflection roller is moveable to a limited extent.

15. A quick-action roll-up door according to claim 1, wherein the quick-action roll-up door is configured as a cold storage room door and the pressure application frame, in cooperation with the force application means, is configured to press the door panel to bear between the pressure application frame and the door frame to provide a cold storage room door seal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the drawings:

[0027] FIG. 1 is a schematic view of a quick-action roll-up door in accordance with the invention from the front;

[0028] FIG. 2 is a schematic functional view of the quick-action roll-up door in a side view in a first position; and

[0029] FIG. 3 is a schematic view showing the door in the closed position in an illustration in accordance with FIG. 2;

[0030] FIG. 4 is a schematic view showing, in an enlarged illustration, the pressure application mechanism from the front; and

[0031] FIG. 5 is a schematic view showing a side cross-section of the pressure application mechanism from FIG. 4.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0032] Referring to the drawings, the quick-action roll-up door 1 illustrated in the figures is intended for purposes of closing a door opening 2 of a cold storage room, which is bounded by a door frame 3, which is fixed in position, and is connected to, or is part of, the cold storage room wall. The door frame 3 is configured in the form of a frame on the front face, and carries a shaft 4 above the door opening 2, which is mounted on the door frame 3 such that it can rotate. The shaft 4 is connected to the upper end of a hanging 5, which forms the door panel 5, and which can be wound onto the shaft 4 by means of the latter. For this purpose, a drive 6 is provided on the door frame, with which the shaft 4 can be driven in the winding-on direction, or in the unwinding direction.

[0033] By means of the drive 6, the shaft 4 can be rotated until the bottom end of the door panel 5 is on the floor, as shown in FIG. 3. In this position (the closed position) the door panel 5 completely closes the door opening 2. Here the door panel 5 is guided laterally between vertical parts of the door frame 3, and pressure application elements 7 arranged vertically parallel to and in front of the latter, which form part of a pressure application frame 8, which in the form of embodiment illustrated is formed by the vertical pressure application elements 7 in the form of beams, and a horizontally arranged upper pressure application beam 9, by means of which the door panel 5 can be pressed against the door frame 3 on both sides (left and right) of the door opening 2, and also on the upper face, to provide a seal.

[0034] In the form of embodiment illustrated, the pressure application frame 8 is partially closed, that is to say, it is open at floor level. If necessary, it can also be completely closed, that is to say, over the full periphery, in which case the floor-level cross support is recessed into the floor so that it can be driven over.

[0035] To avoid a complex linear guide for the pressure application frame 8, the latter is articulated at floor level, so that the weight of the pressure application frame 8 is supported by the floor, and the forces for opening are applied by the coil springs 12.

[0036] The pressure application frame 8 is guided for limited movement on four bolts 11 attached to the door frame 3; that is to say, it can be moved in the direction 10, and in the opposite direction, at right angles to the door panel 5, or to the door opening 2. The bolts 11 are surrounded by coil springs 12, which are pre-loaded and push the pressure application frame 8 away from the door panel 5, so that a clearance is formed for low-friction movement of the door panel 5 for purposes of opening and closing.

[0037] The spacing of the pressure application frame 8 apart from the door frame 3 is supported by a horizontal deflection roller 13 arranged above the door opening 2 and the pressure application beam 9, which is mounted on the pressure application frame 8 such that it can rotate, and which, when the door panel 5 is wound onto the shaft 4, deflects it in such a way, as is clearly visible in FIG. 2 and FIG. 3, that a force is generated to space the pressure application frame 8 apart from the door frame 3. Although for purposes of opening and closing the quick-action door it is necessary to space the pressure application frame 8 apart from the door frame 3 sufficiently so that as little friction as possible occurs in this region, on the other hand a pressure application function is necessary for the sealed closure of the door panel 5 on the door frame, which ensures that in the closed position the hanging 5 closes the door opening 2 with as complete a seal as possible, in order to avoid thermal losses in this region in a cold storage room as far as possible.

[0038] For this purpose, the pressure application frame 8 can be pushed in the direction of the door panel 5 in the direction 10 by the drive 6 of the shaft 4 immediately after the door panel 5 has reached the closed position. Two traction drives 14 are provided for this purpose, which in each case have a spur gear 15 seated on the shaft 4, over which a circulating toothed belt 16 runs in front of a pressure application element 7, which belt is tensioned at the lower end by means of a deflection roller 17, which is arranged on the door frame 3 so that it can be vertically moved to a limited extent, and is spring-loaded in the direction of the floor. The traction drives 14 are thus driven and controlled via the drive unit 6, since the spur gears 15 are connected to the shaft 4 in a rotationally fixed manner.

[0039] In the present example of embodiment, two controlling bodies 18 are arranged on each toothed belt 16, at a distance from each other. The controlling bodies 18 are of cuboidal configuration, and are chamfered towards the bottom, that is to say, they have a sloping ramp 19, which interacts with a bolt-shaped supporting body 20 arranged parallel to the shaft 4 on the door frame, which supporting body projects laterally into the traction drive 14 in such a way that when the sloping ramp 19 of a controlling body 18 comes into contact with the supporting body 20, the controlling body 18 is pushed in the direction 10 towards the pressure application frame 8. The vertical movement of the controlling body 18 is thus converted by the supporting body 20 into a horizontal movement in the direction 10, whereby the pressure application frame 8, in particular the vertical pressure application elements 7, are force-loaded by the controlling body 18 so as to bear against the door panel 5. This force overcomes the pre-load force of the springs 12 spaced apart from the pressure application frame 8, and presses the pressure application frame 8 with its three sides against the door panel 5, in such a way that the latter bears against the door frame 3 to provide a seal, and thus closes the door opening 2 in a sealed manner.

[0040] Since the traction drives 14 are driven via the shaft 4, which also controls the door panel winding, the controlling bodies 18 are always arranged in the same way in relation to the door panel 5 in its closed position. They are adjusted in such a way that immediately after reaching the closed position (FIG. 2) the sloping ramps 19 run onto the supporting bodies 20 and it is thus ensured that after the door is completely closed the door panel 5 bears against the door frame 3 to provide a seal.

[0041] Since the door panel 5 is elastically flexible, the unwinding process can be continued by the shaft 4 even after the door panel 5 completely closes the door opening 2. This further movement is used to relieve the deflection roller 13 and to move the controlling bodies 18 between the supporting bodies 20 and the pressure application frame 8. Here the hanging 5 can bulge slightly between the winder and the roller 13.

[0042] When opening, the movement takes place in the opposite direction; as soon as the sloping ramps 19 slide over the supporting bodies 20, the pressure application frame 8 is spaced apart from the door frame 3 by the spring force of the coil springs 12 as well as by the deflection force on the deflection roller 13, so that the door panel 5 is guided with some play between the door frame 3 and the pressure application frame 8, but is free to move vertically.

[0043] In order to prevent the door panel 5 from tilting, in particular during the closing procedure, and to ensure that the end of the door panel 5 rests evenly on the floor, a crossbeam 21 is attached to the lower end of the door panel 5, at the ends of which guide rollers 22 are arranged so that they can rotate freely and are guided between the door frame 3 and the pressure application frame 8, thus ensuring that the door panel 5 moves up and down in a straight line. The crossbeam 21 with the guide rollers 22 is not illustrated in FIGS. 2, 3 and 5.

[0044] For purposes of opening the quick-action roll-up door 1, the shaft 4 is driven in the winding-on direction by the drive 6, which also drives the traction drives 14 via the spur gears 15, which then first disengage the controlling bodies 18 from the supporting bodies 20, so that the pressure application frame 8 is moved against the pressure application direction 10 by the force of the pre-loaded springs, and creates the necessary clearance between the pressure application frame and the door frame 3, which is required for the low-friction raising of the door panel 5.

[0045] For correct functioning, therefore, only the position of the controlling bodies 18 on the toothed belts 16 must be stipulated, and/or the spur gears 15 on the shaft 4 must be adjusted to ensure that the door panel 5, when it has completely closed the door opening 2, is pressed against the door frame by the pressure application frame 8 to provide a seal or, conversely, when opening, this seal is first released and the door panel 5 is then pulled upwards and wound onto the shaft 4. FIG. 2 and FIG. 3 illustrate these positions in a greatly simplified and enlarged form. In FIGS. 2, 4 and 5 the door panel 5 is immediately before its closed position, that is to say, before it touches the floor. In this position the controlling body 18 with its sloping ramp 19 comes close to the supporting body 20, wherein after the sloping ramp has passed through, the completely closed position illustrated in FIG. 3 is reached, in which the door opening 2 is completely closed, the door panel 5 rests on the floor, and the pressure application frame 8 presses against the pressure application frame 8 by means of the controlling bodies 18 (only one controlling body is shown in the figures).

[0046] In the embodiment variant illustrated, there is not only a crossbeam 21 at the lower end of the door panel 5, but also a crossbeam 23 in an upper region. This crossbeam has two adjustable stops 24 on its lower face, which serve to adjust precisely the closed position of the door panel, namely in such a way that in the closed position the lower crossbeam 21 just rests on the floor. When this closed position is reached, the hanging cannot move any further in the region between the crossbeams 21 and 23 due to the stops 24, which then bear against the upper face of the pressure application frame 8, so that when the hanging is unwound further from the shaft 4, only a bulging of the hanging between the winding and the crossbeam 23 occurs, but otherwise the traction drives 14 are active, which ensure that the pressure application frame 8 is pressed on, and thus that the door panel 5 bears in a planar manner between the pressure application frame 8 and the door frame 3 to provide a seal.

[0047] While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.

LIST OF REFERENCE SYMBOLS

[0048] 1 Quick-action roll-up door [0049] 2 Door opening [0050] 3 Door frame [0051] 4 Shaft [0052] 5 Hanging/door panel [0053] 6 Drive [0054] 7 Pressure application elements [0055] 8 Pressure application frame [0056] 9 Pressure application beam [0057] 10 Pressure application direction [0058] 11 Bolt [0059] 12 Coil springs [0060] 13 Deflection roller [0061] 14 Traction drive [0062] 15 Spur gear [0063] 16 Toothed belt [0064] 17 Deflection roller [0065] 18 Controlling body [0066] 19 Sloping ramp [0067] 20 Supporting body [0068] 21 Crossbeam [0069] 22 Guide roller [0070] 23 Crossbeam [0071] 24 Stops