Quick-action rolling door

Abstract

The high-speed roll-up door has a curtain (3) that can be wound around a horizontal shaft (4), a winding drive (5), and a pressure frame (10) which applies force to the curtain (3) in its closing position, perpendicular to the flat side of the curtain (3). The curtain (3) has control elements (18) which, when the roll-up door (1) opens, space the pressure frame (10) away from the curtain (3).

Description

[0001] The invention relates to a high-speed roller door, in particular a high-speed roller door for cold storage rooms. Such doors with a vertical running direction of the door leaf are known in numerous design variants. Reference is made in this context to EP 1 760 237 A2, EP 0 816 624 B1, or EP 1 847 673 A1.

[0002] The invention is based on prior art as known from WO 2016 / 119836 A1. This design has proven extremely successful; due to the comparatively light and flexible door leaf, high opening and closing speeds can be achieved, which is particularly advantageous for closing cold rooms and freezer rooms, which on the one hand must ensure good accessibility, but on the other hand should only be open for as short a time as possible due to the temperature differences between the interior of the room and the surroundings. Not only the time the door is open counts, but also, in particular, the time it takes the door to open and close again. During this time, access is not guaranteed, but the heat exchange that is to be avoided does occur.It is therefore a constant goal to keep opening and closing times as short as possible, which in practice can only be achieved with high-speed roller doors, which have a comparatively low dead weight and whose flexible door leaf can be wound up with a vertical running direction.

[0003] Especially when used in cold storage or freezer rooms, it's not just the quick opening and closing of the door that's important, but also a tight seal. To achieve this, common approaches include magnetically securing the door leaf to the frame, guiding it in grooves, or providing special seals. One problem with this is that as the door becomes more airtight, the forces required to open it by winding up the tightly fitting door leaf against the frame also increase.

[0004] WO 2013 / 167379 A1 discloses a lifting gate assembly with a lintel sealing device. The lintel sealing device has a free movement gap through which the door leaf can move. To allow the entry of a closing plate into the gap, the lintel sealing device has a pivotable part so that the gap can widen when the closing plate enters. The lifting gate is intended for sealing a clean room, wherein the door leaf is pressed against the slide rails of the door leaf by the excess pressure of the clean room, so that the door is sealed when closed.

[0005] Against this background, the invention is based on the object of designing a high-speed roller door, in particular a high-speed cold room roller door of the type mentioned at the outset, with structurally simple but reliable means in such a way that, on the one hand, rapid opening and closing is possible, but, on the other hand, a tight closure can also be ensured when the door is closed.

[0006] The object of the invention is to design a high-speed roller door, in particular a high-speed cold room roller door, with structurally simple but reliable means in such a way that, on the one hand, rapid opening and closing is possible, but, on the other hand, a tight closure can be ensured when the door is closed, without the space to be sealed having to be pressurized.

[0007] The high-speed roller door according to the invention, which is particularly a high-speed cold storage roller door, comprises a curtain that can be wound around a horizontal shaft, a winding drive, and a pressure frame. The pressure frame applies force to the curtain in its position closing the door opening, transverse to the flat side, for tight contact with the door frame. According to the invention, control means are provided on the curtain side, which space the pressure frame from the curtain when the roller door is opened.

[0008] The basic idea of ​​the inventive solution is to space the pressure frame from the curtain as soon as the roller door opens using control means, preferably mechanically active control means, arranged on the curtain side. This eliminates the need for a separate drive for the pressure frame. Thus, the winding drive not only winds up the curtain of the roller door, but also simultaneously controls the pressure frame. These control means are advantageously exclusively mechanically active and thus simple and reliable in design and operation.

[0009] A high-speed roller door in the sense of the present invention is a roller door which opens or closes a door opening of 2.5 m in height in less than three seconds.

[0010] A high-speed cold room roller door is a roller door that can be used for cold rooms or freezer rooms and therefore also has a high heat-insulating effect.

[0011] For the purposes of the present invention, the "curtain" refers to the door leaf, which in the case of roller doors is also referred to as the "curtain." This curtain is flexible, allowing it to be wound up and preferably has a specific weight of less than 0.5 kg / dm3. It has a certain inherent stability, allowing it to withstand both tensile forces during winding and shear forces during unwinding, meaning it cannot be unwound solely under its own weight.

[0012] In principle, the curtain can be pressed by the pressure frame against any wall or other surface that defines the door opening. However, it is particularly advantageous to guide the curtain between a stationary frame and the pressure frame, with the pressure frame then attached to the frame with limited movement and spring-loaded towards it. This arrangement is particularly advantageous because the high-speed roller door, including the door frame, can be manufactured in the factory and only needs to be installed on-site in the area of ​​the door opening. This stationary frame can therefore be manufactured and pre-adjusted at the factory together with the pressure frame and the other components for the high-speed roller door.The frame, which is then stationary after assembly, allows for secure guidance of the pressure frame for movements toward and in the opposite direction, as the pressure frame is attached to the stationary frame with limited movement. Advantageously, the pressure frame is spring-loaded toward the stationary frame, so that the pressure function is automatically activated by spring force, and the control therefore only needs to be effective in the opposite direction.

[0013] The frames can advantageously be designed as a closed structure; however, in this case, the lower cross-connection at the floor level must be installed in such a way that it can be driven over. However, it is usually sufficient to design the frames so that they guide the curtain along its long sides and extend vertically there, with each frame having at least one upper crossbeam connecting the vertical sides. These connecting upper crossbeams then ensure the necessary stability of the frames.The control means provided on the curtain side can advantageously be formed by one or more wedge-shaped control bodies which are wedge-shaped in the opening direction, i.e. designed and arranged to reduce the cross-section, so that when the curtain is wound up, i.e. when the curtain is raised, they come into contact with the upper crossbar of the pressure frame or with a control bar connected to it and space this at least from the crossbar of the stationary frame.

[0014] In principle, such a wedge-shaped control element can be arranged on one side of the curtain, on the other side of the curtain, or on both sides of the curtain; the latter is particularly advantageous for force distribution. In principle, one wedge-shaped control element on one side of the curtain is sufficient, but it is particularly advantageous to arrange two or more wedge-shaped control elements horizontally next to each other and preferably on both flat sides of the curtain.

[0015] If, as is advantageous, the control is not carried out directly on the crossbeam, but via a control bar connected to and arranged above the pressure frame, an abutment bar should be provided on the other side of the curtain at the top of the stationary frame so that the curtain does not deflect in the area of ​​the wedge-shaped control bodies when raised, but rather generates the necessary transverse forces to space the pressure frame. Both the abutment bar and the control bar are advantageously designed as abutment roller or control roller. These do not necessarily have to be rotatably mounted; a tubular design of the bars may suffice.

[0016] According to an advantageous embodiment, the high-speed roller door is provided with a locking device that holds the pressure frame in this position after the separation. Such a locking device can be arranged at a suitable location between the frames or next to the frames.

[0017] Such a locking device is advantageously designed to be self-locking, specifically in such a way that it is activated and / or deactivated by control means arranged on the curtain side. If such a locking device is designed to be self-locking, it is sufficient to activate it once to move it into the locked position, and vice versa, only once to move it out of the locked position. This is advantageously achieved by appropriate spring means.

[0018] From a design perspective, it is particularly advantageous if the control means for the locking device arranged on the curtain side have a control rod protruding laterally from the curtain, which is operatively connected to a locking lever pivotably arranged on the frame side, which in a first position holds the pressure frame in its spaced-apart position and in a second position releases its movement. It is advantageous to design the locking lever so that it automatically pivots into its locked position. With such a design, the control rod or preferably the control rods protruding laterally on both sides of the curtain serve to deactivate the locking device, i.e. to pivot the spring-loaded locking lever out of its locked position and hold it in this position. This is the position in which the curtain closes the door opening and in which the pressure frame presses the curtain sealingly against the stationary frame.

[0019] If, as is advantageous, a locking device is provided on each side of the curtain and control rods protrude laterally on both sides of the curtain, even force application is ensured, and the forces required for control are distributed across both sides of the curtain. This can be further improved by having the control rods as part of a crossbar or attached to a crossbar that extends across the entire width of the curtain. The curtain is then loaded evenly across its entire width. The control rods, the crossbar and / or the wedge-shaped control bodies are advantageously made of a light but hard material, such as aluminum, CFRP or the like.

[0020] From a structural point of view, it is particularly advantageous if the cross bar not only forms control rods on one or both sides, but also serves to fasten the control bodies, so that the entire mechanical control is formed by this cross bar or the components attached to it and forces are transmitted evenly across the entire width of the curtain.

[0021] The curtain itself is advantageously made of a flexurally elastic composite material based on textiles, which is lightweight, has good heat insulation and is inherently stable, so that it can be wound up onto a shaft, but on the other hand is so inherently stable that a certain thrust force can be exerted on it when unwinding, so that it can be moved at high speed in both the opening and closing directions.

[0022] The invention is explained in more detail below with reference to an embodiment illustrated in the drawings. In the drawings: Fig. 1 in a highly simplified schematic representation of a cold room high-speed roller door in front view in closed position, Fig. 2 a side view of the roller door according to Fig. 1 in partially sectioned view, Fig. 3 the side view according to Fig. 2 in the open position of the pressure frame, Fig. 4 a partial sectional view from above, Fig. 5 the representation according to Fig. 2 simplified and enlarged representation, and Fig. 6 the representation according to Fig. 3 simplified and enlarged.

[0023] The high-speed cold room roller door 1 shown in the drawings has a curtain 3 which closes a door opening 2 of a cold room and which is designed as a composite material on a textile basis, which is elastic and flexible, so that it can be wound up on a shaft 4 above the door opening 2, which can be driven by a winding drive 5, not shown in detail here, to open or close the roller door.

[0024] The roller shutter has a fixed frame 6, which is firmly and tightly connected to the masonry in front of the door opening 2. The frame 6 has two vertical beams 7 extending from the floor 8 to an upper crossbeam 9, which connects the free upper ends of the vertical beams 7.

[0025] Parallel to the frame 6 and at a distance from it, a pressure frame 10 is provided, which also has two vertical beams 11 that are connected to one another at their upper ends by an upper cross beam 12. The pressure frame 10 is mounted for limited movement via two guide bolts 13 so that the pressure frame 10 can be moved towards the frame 6 and in the opposite direction. Four clamping bolts 14 are provided, which are anchored in the vertical beams 7 of the fixed frame 6 and which are guided through correspondingly aligned holes in the vertical beams 11 of the pressure frame 10. These are provided at their ends with helical compression springs 15, which are clamped between the outside of the pressure frame 10 and washers 16. The washers 16 are secured by nuts 17 at the end of the clamping bolts 14.

[0026] In order to ensure sufficient contact pressure of the pressure frame 10 in the area of ​​the upper crossbeam 12, particularly in the case of wide doors which extend over a large width of, for example, three metres or more, a support beam 27 which runs horizontally and transversely at a distance from the fixed frame is attached via supports 26 attached to the sides of the fixed frame 6 and which carries three, in this embodiment, three helical compression springs 28 with which a contact pressure is exerted on the upper crossbeam 12 of the pressure frame 10 in order to ensure a tight closure of the curtain 3 not only laterally but also in the upper area of ​​the door opening.

[0027] Alternatively, the clamping bolts 14 can also be formed by clamping screws which are fixed in corresponding threaded holes of the frame 6 and whose heads hold the washers 16.

[0028] The vertical beams 7 and 11 of the frames 6 and 10 serve to guide the curtain laterally during opening and closing. Furthermore, the frame 6 forms an abutment against which the curtain 3, in its position closing the door opening 2, is pressed by the spring force of the coil springs 15 via the pressure frame 10, thus sealing the door opening 2 when the curtain 3 is closed. This sealing position is shown in the Fig. 2 and 5 shown.

[0029] To open the roller shutter 1, the winding drive 5 must be activated in the opening direction, which causes the shaft 4 to rotate to wind up the curtain 3. Due to the tight contact of the curtain 3 with the frame 6 and the pressure frame 10, comparatively high frictional forces arise when raising from this position. Therefore, control means are provided on the curtain 3, which move the pressure frame 10 from the Fig. 2 and 5shown sealing position so that the Fig. 3 and 6 The spaced-apart position shown is achieved, in which the curtain 3 is guided between the frames 6 and 10, but is otherwise practically freely movable. For this purpose, wedge-shaped control bodies 18 are provided on both flat sides of the curtain 3. In the embodiment shown, the control bodies 8 are wedge-shaped in the winding direction, i.e., with an effective cross-section that increases from top to bottom.

[0030] These control bodies 18, distributed along a horizontal line of the curtain 3, are operatively connected to an abutment beam 19 in the form of a roller on the rear side of the curtain 3, which is firmly connected to the frame 6. The control bodies 18 on the front side of the curtain 3 are operatively connected to a control beam 20 in the form of a control roller, which is firmly connected to the upper side of the pressure frame 10 via levers 21.

[0031] As soon as the curtain 3 is moved in the winding direction, i.e., upwards, the control bodies 18 engage the abutment beam 19 and the control beam 20 and push them apart. Since the abutment beam 19 is stationary, the control beam 20 is acted upon and moved in two ways by the control bodies 18, namely at the front and at the back. This distances the pressure frame 10 from the frame 6 against the force of the coil springs 15.

[0032] In order to maintain this spacing even when the curtain 3 is moved beyond the Fig. 3 and 6 shown position, locking devices 22 are provided on both sides of the frame 6 to the side of the curtain 3, each of which has a pivoting lever 23 which is spring-loaded and automatically moves into the position determined by the Fig. 3 and 6shown locking position, in which the end of a pivot lever 23 hits a stop 24 which is firmly connected to the pressure frame 10. The pivot levers pivoted out perpendicular to the frame 6 thus block the pressing movement of the pressure frame 10 by the coil springs 15 via the contact of their front sides with the stops 24. In this position, the curtain 3 can be moved upwards and wound up with low friction and later unwound and moved down again. Even when unwinding the curtain 3, i.e. when moving from the open to the closed position, the locking devices 22 with the pivoted-out pivot levers 23, which rest against the stops 24, ensure that the curtain 3 is guided with low friction between the frames 6 and 10, which is a prerequisite for fast movement.However, in order to ensure that the pressure frame 10 presses the curtain 3 tightly against the frame 6 immediately before reaching the closed position, the locking device 22 must be unlocked on each side. For this purpose, control rods 25 are provided on both sides of the curtain 3. These control rods project laterally beyond the curtain and, when the curtain 3 is lowered immediately before reaching the closed position, pivot the pivot levers 23 downwards against the spring force, thus releasing the locking of the pressure frame 10. The curtain 3 then has the position shown in the . Fig. 2 and 5 shown position is reached, in which the control rods 25 rest on the pivot levers 23 and unlock them and the wedge-shaped control bodies 18 have passed through the beams 19 and 20. List of reference symbols

[0033] 1Rolling door 2Door opening 3Curtain 4Shaft 5Winding drive 6Frame 7Vertical beams of frame 6 8Floor 9Upper cross beam of frame 6 10Pressure frame 11Vertical beams of pressure frame 10 12Upper cross beam of pressure frame 10 13Guide bolts 14Tension bolts 15Coil springs 16Washers 17Nuts 18Wedge-shaped control bodies 19Abutment beams 20Control beams 21Levers 22Locking devices 23Pivoting levers 24Stops 25Control rods 26Supports 27Support beams 28Springs

Claims

1. Quick-action roller door, in particular a quick-action cold store roller door, with a curtain (3), which can be wound up around a horizontal shaft (4), with a winding drive (5), and with a pressure application frame (10), which applies a force to the curtain (3) in its closing position, transversely to the planar face of the curtain (3), so as to provide a tight fit against a door frame, characterised in that, control means (18) are provided on the sides of the curtain, which, when the roller door (1) is opened, distance the pressure application frame (10) from the curtain (3).

2. Quick-action roller door in accordance with Claim 1, characterised in that, the curtain (3) is guided between a stationary frame (6) and the pressure application frame (10), wherein the pressure application frame (10) is attached to the frame (6) with limited movement, and is spring-loaded towards the latter.

3. Quick-action roller door in accordance with Claim 1 or 2, characterised in that, the frames (6, 10) guide the curtain (3) on its long sides and there extend vertically, and in that, each frame (6, 10) has at least one upper transverse bar (9, 12) connecting the vertical sides.

4. Quick-action roller door in accordance with one of the preceding claims, characterised in that, at least one wedge-shaped control body (18) is provided on the side of the curtain in the opening direction, which, when the curtain (3) is raised, comes into contact with the upper transverse bar (12) of the pressure application frame (10), or a control bar (20) connected to it, and distances the latter at least relative to the transverse bar (9) of the stationary frame (6).

5. Quick-action roller door in accordance with one of the preceding claims, characterised in that, on the sides of the curtain two or more wedge-shaped control bodies (18) are arranged horizontally side-by-side, and in that, an abutment bar (19), preferably in the form of an abutment roller, is arranged at the top of the stationary frame (6), at a distance from the upper transverse bar (9), and the control bar (20), preferably in the form of a control roller, is arranged at the top of the pressure application frame (10), at a distance from the upper transverse bar (12).

6. Quick-action roller door in accordance with one of the preceding claims, characterised in that, a locking device (22) is provided, which maintains the pressure application frame (10) at a separation distance, in accordance with the distancing procedure.

7. Quick-action roller door in accordance with one of the preceding claims, characterised in that, the locking device (22) is designed to lock automatically, and is activated and / or deactivated by control means (25) arranged on the sides of the curtain.

8. Quick-action roller door in accordance with one of the preceding claims, characterised in that, the control means for the locking device (22), arranged on the sides of the curtain, have a control rod (25) projecting from the sides of the curtain, which is operatively connected to a pivotably arranged locking lever (23), arranged on the side of the frame, which in a first position holds the pressure application frame (10) in its distanced position, and in a second position releases it.

9. Quick-action roller door in accordance with one of the preceding claims, characterised in that, the locking lever (23) is spring-biased in such a way that it automatically pivots into its locking position.

10. Quick-action roller door in accordance with one of the preceding claims, characterised in that, a locking device (22) is provided on each side of the curtain (3), and in that, control rods (25) protrude laterally from both sides of the curtain.

11. Quick-action roller door in accordance with one of the preceding claims, characterised in that, the control rod(s) (25) is / are part of a transverse rod, which extends across the entire width of the curtain (3).

12. Quick-action roller door in accordance with one of the preceding claims, characterised in that, the control bodies (18) are attached to the transverse rod.

13. Quick-action roller door in accordance with one of the preceding claims, characterised in that, the curtain (3) is formed from a flexurally elastic composite material with a textile base.

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