EP0930416B1 - Roller shutter - Google Patents

Description

The invention relates to a roller shutter door an opening, in particular an outer door of a Building, with a flexible curtain that matches his upper edge area in the area of the upper limit the opening to be closed is fastened with one intended for winding the curtain, in essentially halfway up the curtain connected lifting shaft, for simultaneous Winding up the one located below the lifting shaft Lower part and the one located above the lifting shaft Upper part of the curtain on the lifting shaft by means of a Actuation mechanism rotatable and on the top Edge area of the curtain is arranged to be displaceable is.

Such a roller door is for example from the US 3,306,344. In the known lifting gate Lift shaft driven by an electric motor that together with a gearbox directly on the lifting shaft is attached and when opening the lifting gate moved together with the lifting shaft. That when turning the The counter shaft torque occurring at the motor is from a rod added, which on the one hand with the Engine and on the other hand with a special Support device is connected. Because the rod is rigid is also must be the one when pressing the Rolling gates changing distance between the motor and the support device by further mechanical Funds are balanced.

The movable motor of the well-known roller shutter has the Disadvantage that for the compensation of torque and A high structural effort got to. In addition, a moving motor requires flexibility Power lines or open tracks that often Give cause for malfunctions and also out Security reasons should be avoided. Finally, the moving motor contributes Enlargement of the mass to be moved, whereby the Energy expenditure required for actuation enlarged and the maximum Actuation speed is reduced.

Another, known from US 3,398,779 Rolling gate, the curtain is just put on one Lift shaft wound up over the entire height of the opening to be closed must be moved. The Electric motor is permanently installed here. The mechanical The actuation movement is transmitted by means of an endless chain that extends from the motor shaft starting from the entire height of the roller shutter extends, and one in a guide rail guided gearbox, which is connected to the lifting shaft and moves up and down with it, the torque occurring from the Guide rail is added.

Although the electric motor is rigidly attached here, requires the one intended to drive the lifting shaft Mechanics still require a lot of construction work, which drives up manufacturing costs and brings an increased susceptibility to failure. Here the moving gear contributes to the enlargement of the moving mass, with the mentioned negative Effects on energy expenditure and Operating speed.

FR-A-2 211 585 is a generic one Hublot can be seen, the drive on one Side of the curtain is placed.

It is therefore the object of the present invention to specify a rolling gate that is small in construction Effort allows quick and safe actuation.

The object is achieved in that the mentioned actuation mechanism one in the upper Edge area of the curtain is substantially horizontal across the width of the closable Opening, rotatably and drivable main shaft, which in their two End areas with the one ends of windable drive belts connected non-rotatably are that the other ends of the drive belts with the two end regions of the lifting shaft each non-rotatably connected and in the closed state of the Roller shutters are partially wound up.

In the subject matter of the invention are for the transfer Drive movement only a few mechanical elements required, which is also not together with the Stroke shaft must be moved. Because of the simple Not only the manufacturing, Installation and maintenance costs are reduced, but also a safe and trouble-free operation guaranteed. The function of a gearbox is taken over by the drive belts depending on desired ratio with or reduction different number of turns on the lifting shaft and the main shaft can be wound up. The Weight of the lifting shaft together with the wound up Sections and the bottom of the curtain will mainly raised by the drive belts that on the lifting shaft at the same time that for winding generate the required torque.

In contrast to those from the prior art known arrangements is in the inventive Roller shutter relieves the top of the curtain. Moreover is a much smaller torque to wind up required because on the one hand only a minor one Total mass must be moved and on the other hand only a small part of the total moving mass by means of the rotation of the lifting shaft is raised. The Relief of the curtain top and the reduction of the required torque contribute to Extending the life span and reducing the Susceptibility to malfunction and still allow lighter design and higher Operating speed.

In a preferred embodiment of the roller shutter, the actuating mechanism comprises an electric motor for Main shaft drive, preferably via a Drive chain or a toothed belt with the Main shaft is connected. Apart from that The convenience of an electric drive has built-in electric motor has the advantage that it no flexible supply lines required. The Power transmission via drive chain or Toothed belt allows, unlike a rigid one Transmission when connecting the main shaft directly and motor shaft, on the one hand an adjustment of the Translation and on the other hand a compact design, where the motor shaft is shifted parallel to the Main shaft is arranged.

For a roller shutter of average size achieved particularly good operating characteristics if the drive belts in the closed state of the Rolling gates on the main shaft up to one Winding diameter from 95 to 100 mm and on the Lift shaft up to a winding diameter of 60 to 80 mm are wound up.

The driving force and thus the strength of Drive motor and mechanics can be advantageous can be reduced if the actuating mechanism Relief belt that has one end on an axial projection of the main shaft, preferably on their facing away from the motor drive Side, rotatably arranged and in the closed Condition of the roller shutter is so wound that one between the other end of the relief belt and a fixed point arranged tension spring Main shaft preloaded in the opening direction. Moreover can this arrangement for an emergency opening of the Rolling gates used in the event of motor drive failure become. It is best to choose the preload so large that the curtain is up to half the height solely through the Force of the tension spring can be opened.

To make the mechanics even safer and more reliable it is proposed that the Actuating mechanism includes guide rails that are right and left side of the curtain in the extend substantially vertically and that the lifting shaft with axially protruding guide pins is provided, which engage in the guide rails, so that the lifting shaft in the guide rails in fixed in the horizontal direction and in the vertical Movable and rotatably guided. Especially when opening or closing very quickly of the roller door, this measure ensures that none unwanted movements of the curtain and the Stroke shaft occur. In addition, the horizontal one Fixation for better stability of the closed roller shutters with wind load.

When using the curtain in its lower edge area an essentially horizontally arranged bar is provided, its lower edge always remains straight and smoothly aligned. By the weight of the bar the lower part of the curtain in particular kept stretched condition and closing the Improved roller shutters on the lower edge.

If the bar is also axially laterally protruding guide pins is provided in the Engage the guide rails so that the bar in the Guide rails fixed in the horizontal direction and is guided displaceably in the vertical direction the tight closing of the roller shutter and its Stability further improved with wind loads. Furthermore, this measure ensures just like the guidance of the lifting shaft that when opening quickly or closing the roller door no undesirable Movements of the lower part of the curtain and the bar occur.

In a development of the invention, it is proposed that in the area of the two narrow sides of the roller shutter one each in the vertical direction over the height of the roller shutter extending, in horizontal section arranged essentially L-shaped sheet profile is, being at right angles to the curtain extending leg of the sheet profile with the respective guide rail and one parallel to the Curtain extending leg with one on the Curtain angled brush strip is provided. The sheet metal profile partially covers the drive mechanism and protects them from the harmful effects of Outside. The brush strip is used for improvement sealing with the roller shutter closed. Through the Integration of the guide rail in the sheet metal profile the manufacturing effort is reduced. The entire Sheet profile with both legs and the Guide rail can be made in one piece from a simple Sheet to be bent.

To improve operational safety is provided that the lifting shaft on the inside and Outside of the curtain each with a lengthways the fender extending fender enclosed is, the fenders on the top and Bottom only one slot each Clear passage of the curtain, and that the two Fenders through two to the right and left of the curtain arranged connecting parts connected to each other are, with the connecting parts on the lifting shaft are rotatably mounted. The fenders are moving together with the lifting shaft and cover them, so that not accidentally when opening the roller shutter any objects, fingers or other Body parts with the curtain on the lifting shaft can be wrapped.

The fenders are designed to a certain extent compared to their normal position, in which the between slits formed up and down point, be rotatable so that the slots of the when winding the curtain onto the lifting shaft position of the Can follow the curtain. When opening very quickly or closing the roller shutter there is a risk that the fenders are wider than necessary twist.

To avoid excessive rotation of the Fenders are therefore recommended that at least one of the connecting parts a laterally in the axial Has a protruding rotation limiting part, that in a guide arranged to the side of the curtain intervenes. The guide leaves the rotation limiting part so much play that the rotation of the fenders in permissible range is not obstructed.

To avoid electrical charging of the Fenders due to the friction on the moving curtain serves the measure that at least via a rotatable mounting of the connecting parts electrical connection between the fenders and the lifting shaft.

In an embodiment of the invention it is provided that those on the curtain, upper and lower Mudguard edges each with curves are provided, which are preferably low-friction Have sliding layer. This measure contributes to Reduction of wear and thus to Reliability and security of the operation of the Roller shutters at. In addition, it is used for operation required energy expenditure is further reduced and the operating speed increases.

The measure that the connecting parts with the Fenders by screwing into the curves Screws are connected with regard to one simple and inexpensive design especially advantageous because the existing curves the mudguards used for the screw connection without additional mudguards Holes or bends would have to be made.

In a preferred embodiment, the Lifting shaft on two half shells, which are at medium height placed on the front and back of the curtain and screwed together. This connection between lifting shaft and curtain is low Work effort particularly easy to carry out. It is not required the top and bottom of the To attach the curtain separately to the lifting shaft. The The curtain doesn't even have to be divided.

On the one hand, the design of the half shells for to keep the lifting shaft simple and on the other hand the Functions of the winding of the drive belts and the Guiding the lifting shaft in the side Ensuring guide rails becomes a Further development of the invention recommended, in which the both side ends of the half shells with each an end piece are rotatably connected, on which the respective drive belt can be wound up and one axially projecting guide pin.

Operational safety can still be improved by using the guide pins of the end pieces on their free ends each with a lock washer are provided. If one of the two drive belts tears, the lifting shaft can at most on this side slide down until the lock washer from the inside against the guide rail and a prevents further slipping.

In an embodiment of the invention it is provided that at least one end piece with an actuating disc is provided for actuating a limit switch. Because of the simple design options of These are particularly suitable for end pieces additional measures.

For the same reason, it is also advantageous if the Connecting parts of the fenders on the end pieces are rotatably mounted.

By the measure that the lower bar of the Curtain has two half-shells, the lower Edge area on the front and back of the Curtains are attached and screwed together, you don't just get the one related to the corresponding design of the lifting shaft mentioned advantage of a simple type of fastening, but also a smaller number of different ones Components and thus lower storage costs, because the same half shells for both the lifting shaft and can also be used for the bar.

To guide the bar in the guide rails too ensure without reducing the shape of the half-shells To complicate unnecessarily, it is recommended that the both side ends of the half shells with each are provided with an axially projecting guide pin.

In a further development of the invention, that in the floor area on the right and left sides of the roller shutter two automatic wind protection devices are arranged, each one in its center stored, essentially rectangular Have double lever by means of a tension spring is so biased that its upper leg in horizontal position the respective guide pin the bottom bar with the curtain closed presses down, but with the curtain opening from that Guide pin over a dead center of the spring force in a vertical position can be brought in, by the tension spring remains fixed, and that the now horizontal, lower leg with closing Curtain using the lowering guide pin can be folded down so that the guide pin after the dead center of the spring force is exceeded upper leg is pressed down. On roller shutter equipped in this way also lasts stronger wind load tight. Especially that Lower part of the curtain can no longer through the wind be opened because the bar by the spring force is pressed firmly to the ground.

Further advantages and details of the invention result from the following description of a Embodiment with reference to the drawings.

Figur 1

eine perspektivische Seitenansicht eines erfindungsgemäßen Rolltores im geschlossenen Zustand, mit teilweise abgenommener Abdeckung;

Figur 2

eine vergrößerte Teilansicht desselben Rolltores gemäß Linie A-A von Figur 1;

Figur 3

eine Teilansicht wie in Figur 2 des halb geöffneten Rolltores;

Figur 4

eine stark vergrößerte teilweise Draufsicht in Richtung B von Figur 1;

Figur 5

eine stark vergrößerte perspektivische Darstellung eines Details C aus Figur 1;

Figur 6

einen stark vergrößerten Schnitt gemäß Linie D-D von Figur 1;

Figur 7

eine stark vergrößerte perspektivische Darstellung eines Details E aus Figur 1 bei geschlossenem Rolltor;

Figur 8

eine Darstellung wie Figur 7, jedoch bei geöffnetem Rolltor.

The figures show in detail:

Figure 1

a side perspective view of a roller shutter door according to the invention in the closed state, with the cover partially removed;

Figure 2

an enlarged partial view of the same roller shutter along line AA of Figure 1;

Figure 3

a partial view as in Figure 2 of the half-open roller door;

Figure 4

a greatly enlarged partial plan view in the direction B of Figure 1;

Figure 5

a greatly enlarged perspective view of a detail C of Figure 1;

Figure 6

a greatly enlarged section along line DD of Figure 1;

Figure 7

a greatly enlarged perspective view of a detail E from Figure 1 with the roller shutter closed;

Figure 8

a representation like Figure 7, but with the roller shutter open.

The invention shown in the figures Roller shutter is one for closing the opening Exterior door of a building determined. How best to recognizes in Figures 1 to 3 it has one flexible curtain 1, which is at its upper edge 2 by means of a holding plate attached to the building 3 is suspended. The curtain 1 is halfway up firmly connected to a lifting shaft 4, which means an actuating mechanism 5 is rotatable. When turning the lifting shaft 4 winds this at the same time arranged above her top 7 and that lower part 6 of the curtain arranged below. The lifting shaft 4 must necessarily on the coiled top 7 along up on the to move the upper edge 2 of the curtain (Figure 3).

The actuating mechanism 5 has a horizontal arranged main shaft 8, which in the area of upper edge 2 of the curtain 1 rotatable on the building is stored and across the width of the occluding opening extends. The main shaft 8 can be driven by an electric motor 15, the via a drive chain 16 with the main shaft 8 connected is.

To connect the drive between the main shaft 8 and the lifting shaft 4 are two drive belts 11, 12 provided with at their respective upper ends the right and left end portions 9, 10 of the Main shaft 8 rotatably connected and partially on these are wound up. The respective lower ends of the two drive belts 11, 12 are non-rotatable with the right and left end regions 13, 14 of the lifting shaft 4 connected and partially wound on this. Around on the one hand enough belt length for unwinding To have disposal and on the other hand a reasonable one Gear ratio between the Rotational speeds of the main shaft 8 and Obtaining the lifting shaft 4 has turned out to be special turned out favorably when the drive belts 11, 12th in the closed state of the roller shutter on the Main shaft 8 up to a wank diameter of 95 up to 100 mm and on the lifting shaft 4 up to one Winding diameters of 60 to 80 mm are wound.

To open the roller door, the electric motor 15 turned on, the drive chain 16 the Main shaft 8 rotates in the opening direction 21. there the drive belts 11, 12 on the main shaft 8 wound up and pull the lifting shaft 4 upwards. There the drive belts 11, 12 are not exactly above the Attacking the shaft axis arises on the lifting shaft 4 Torque that rotates the lifting shaft 4. It tilts first the perpendicular to one through the Lines of contact of the curtain 1 with the lifting shaft 4 imaginary plane from the plane in FIG. 2 shown position 65 in the shown in Figure 3 Position 66. Then the torque mentioned causes that the curtain 1 is wound on the Hübwelle 4 becomes. If the lifting shaft 4 the area of the upper Edge 2 of the curtain 1 is reached, a will not Limit switch shown, it can be off For security reasons, several can also be provided actuated and thus the electric motor 15th switched off. That is also in this position Lower part 6 of the curtain 1 completely on the Lift shaft 4 wound so that the door opening to Passage or for the passage of a vehicle in the full amount is free. Closing the curtain 1 takes place accordingly in the opposite direction.

To relieve the electric motor 16, the Actuating mechanism 5 on a relief belt 17, the one at the top with one on the top Electric motor 15 side facing away from the roller shutter arranged axial projection 18 of the main shaft 8 non-rotatably connected and partially on them is wound up. At its other end is the Relief belt 17 at an upper end of a Tension spring 20 attached, the lower end of one fixed point 19 is anchored in the area of the floor. As best seen in Figures 2 and 3, shortens the tension spring 20 when opening the Rolling gates, the relief belt 17 from axial projection 18 of the main shaft 8 and this drives in the direction of rotation 21. In this way can the curtain 1 without motor support in an emergency up to approximately the height shown in FIG. 3 be driven upwards.

The actuating mechanism 5 also comprises two Guide rails 22, 23, which are right and left extend vertically next to the curtain 1. In these Guide rails 22, 23 grip two guide pins 24, 25 a, which is in the axial direction laterally from the Stand out lifting shaft 4. In this way the Lift shaft 4 guided in the guide rails 22, 23, so that they rotate and free in the vertical direction can move, but fixed in the horizontal direction is. Especially when there is a wind load guided lifting shaft 4 always in their intended Held position in which the curtain 1 the Door opening tightly closed. To a tight one Ensure closing also in the floor area the curtain 1 in its lower edge area with a horizontal bar 26 equipped, which also with lateral, axially projecting guide pins 27, 28 is provided. These guide pins 26, 27 engage in the guide rails 22, 23 and fix the bar 26 against displacement in horizontal direction while the free Mobility in the vertical direction is retained.

Furthermore, the roller door has two sheet metal profiles 29, 30 on the two narrow sides right and left are arranged and spread over the entire height of the Rolling gates extend. How best to figure 4 recognizes the sheet profiles 29, 30 in cross section L-shaped and each have a right angle to the curtain 1 arranged legs 31, 32, which also the respective guide rail 22, 23 comprises, and a leg arranged parallel to the curtain 1 33, 34, which is provided with a brush strip 35, 36 is. The brush strip 35, 36 is towards the curtain 1 angled and touches it, causing the Sealing of the roller door is improved. In addition to the Sheet metal profiles 29, 30 are two cover sheets 37, 38 provided, which is also over the entire Extend the height of the roller shutter and cover the laterally arranged parts of the actuating mechanism 5 complete. The cover plates 37, 38 were for the Representation of Figure 1 from its installation position removed the arrangement of the ones behind it Show components.

To protect against accidental winding It is objects or parts of the body such as fingers Stroke shaft 4 surrounded by two fenders 39, 40, those on the front and back of the Curtain 1 are arranged and over it extend the entire width. Preferably, the Mudguards 39, 40 made of aluminum to the at Actuation of the roller door to be moved mass if possible to keep low. The invention includes regardless of the name chosen "Fenders" made of plastic or other suitable Materials.

As can best be seen in Figure 6, the two fenders 39, 40 on the top and Bottom only one slot 41, 42 for Passage of the curtain 1 free, so that access to the Lift shaft 4 is blocked for thicker objects. The But curtain 1 can pass through the slots 41, 42 slide through when it hits the lifting shaft 4 should be wound up. He usually does at the edges delimiting the slots 41, 42 Fit fenders 39, 40 and slide along. Around to facilitate the sliding of the curtain 1, these are Edges formed as curves 46 with a low-friction sliding layer 47 made of Teflon or a other suitable plastic material are provided.

As you can best see in Figure 5, the two are Fenders 39, 40 using two right and left of the curtain 1 arranged connecting parts 43, 44 connected with each other, with pivot bearings 45 on the Lift shaft 4 are rotatably mounted. This arrangement enables the lifting shaft 4 to be rotated for winding of the curtain 1, without the on the lifting shaft 4th stored fenders 39, 40 would have to turn. The Rotary bearings 45 are electrically conductive, so that a roughly by friction of the curtain 1 to the Mudguards 39, 40 or the sliding layers 47 occurring electrical charging via the earthed Lifting shaft 4 is safely derived. The on the edges the fenders 39, 40 formed curves 46 also serve to screw in screws 48 for fastening the connecting parts 43, 44 the fenders 39, 40.

As can best be seen in Figure 5, this is one thing Connecting part 43 with a rotation limiting part provided that from a on the connecting part 43 attached, angled lever arm 49 and one on Lever arm 49 attached roller 50. How to best seen in Figure 4, the roller 50 engages a guide 51 arranged on the side of the curtain 1 one by the space between the one Leg 33 of the sheet profile 29 and the other Leg 31 arranged guide rail 22 is formed becomes. This space limits the movement of the Roll 50, so that the fenders 39, 40 indeed freely within a limited angular range Can rotate shaft 4, but a rollover is prevented.

As can best be seen in Figure 6, the Lifting shaft 4 in a simple way from two half shells 52, 53 composed, the medium height on the Front and back of the curtain 1 put on and are screwed together. The curtain 1 will clamped between the two half-shells 52, 53 and kept safe. How best to use the characters 4 and 5 recognizes the end regions of the lifting shaft 4 formed as end pieces 13, 14 which with the lateral ends of the half shells 52, 53 rotatably are connected. The end pieces 13, 14 each include the pivot bearing 45 for the rotatable mounting of the Connecting parts 43, 44, a winding section 54 for Winding the drive belts 11, 12, one Actuating disc 55 for actuating one limit switch shown, a guide pin 24, 25th for engagement in one of the guide rails 22, 23 and one at the free end of the guide pin 24, 25 arranged locking washer 56, the one Slipping out of the guide pin 24, 25 from the respective guide rail 22, 23 prevented, if once a drive belt 11, 12 should tear.

Just like the lifting shaft 4, there is also the lower one Strip 26 of the curtain 1 of two, not here individual illustrated, half-shells, in the lower Edge area on the front and back of the curtain are attached and screwed together. This Half-shells are at the two lateral ends of the Provide bar 26 with guide pins 27, 28, in the guide rails 22, 23 intervention.

The roller shutter is in the floor area on the right and left side also with two wind protection devices 57, 58 equipped, one of which is shown in FIGS. 7 and 8 is shown in more detail. A double lever 59 exists from an upper leg 60 and a lower one Leg 61, which are approximately at right angles to each other are arranged. Where the two legs 60, 61 connected together is the double lever rotatably mounted. With the axis of rotation of the double lever 59 a tension arm 63 is also connected in a rotationally fixed manner, which in turn has one end of a tension spring 62 attacks. The other end of the tension spring 62 is on fixed to a fixed point 64 of the roller shutter.

The angular position of the tension arm 63 relative to the two legs 60, 61 is chosen so that the Double lever 59 when the upper position is horizontal Leg 60 in one and horizontal Position of the lower leg 61 in the other Direction of rotation is biased, being in one intermediate angular position with respect to Bias occurs a dead center.

Figure 7 shows the situation with the curtain closed 1. The upper leg 60 is horizontal and is so biased that he down on the guide pin 27 presses, the bar 26 holds the floor and the Curtain 1 pulls smooth even in strong winds. Will the Open curtain 1, the guide pin 27 presses the upper leg 60 up until dead center is reached. Then the double lever 59 folds under the action of the tension spring 62 automatically until the upper leg 60 strikes the sheet metal wall 33 and the lower leg 61 in the horizontal position stop. This situation is shown in Figure 8. It is also by the tension spring 62nd stabilized.

If the curtain 1 is closed again, it lowers the bar 26 to the guide pin 27 with its own weight a little from above horizontally standing lower leg 61 presses and this pivots down until the dead center is reached is. Now the double lever 59 folds back into his other stable position and press with the upper leg 60 the guide pin 27 down, wherein the wind-secured state shown in Figure 7 is restored.

The wind protection devices 57, 58 described are working on both sides in the same way fully automatically without special energy supply or operation.

LIST OF REFERENCE NUMBERS

1

curtain

2

edge

3

Halteblech

4

Hubwelle

5

actuating mechanism

6

lower part

7

top

8th

main shaft

9

end

10

end

11

drive belt

12

drive belt

13

End area, end piece

14

End area, end piece

15

electric motor

16

drive chain

17

Entlastungsgurt

18

axial projection

19

fixed point

20

mainspring

21

Opening of rotation

22

guide rail

23

guide rail

24

guide pin

25

guide pin

26

strip

27

guide pin

28

guide pin

29

metal profile

30

metal profile

31

leg

32

leg

33

leg

34

leg

35

brush strip

36

brush strip

37

Cover plate

38

Cover plate

39

mudguard

40

mudguard

41

slot

42

slot

43

connecting part

44

connecting part

45

pivot bearing

46

curve

47

Overlay

48

screw

49

lever arm

50

role

51

guide

52

half shell

53

half shell

54

winding section

55

operating disc

56

lock washer

57

wind protection

58

wind protection

59

double lever

60

leg

61

leg

62

mainspring

63

clamping arm

64

fixed point

65

position

66

position

Claims (21)

1. A roll-up door for closing an opening, in particular an outer door of a building, with a flexible curtain (1) which with its upper edge region (2) is fastened in the region of the upper border of the opening to be closed, with a lift shaft (4) which is envisaged for winding up the curtain (1), is connected to the curtain essentially at half the height, and, for simultaneously winding up the lower part (6) of the curtain located below the lift shaft (4), and the upper part (7) of the curtain (1) located above the lift shaft (4) onto the lift shaft (4), is arranged rotatable and displaceable to the upper edge region (2) of the curtain (1) by way of actuation mechanics (5), characterised in that the mentioned actuation mechanics (5) comprise a rotatably mounted and drivable main shaft (8) which in the upper edge region (2) of the curtain (1) extends essentially horizontally transversely over the width of the opening to be closed and which in its two end regions (9, 10) in each case is connected in a rotationally fixed manner to the end of windable drive belts (11, 12), that the respective other ends of the drive belts (11, 12) are in each case connected to the two end regions of the lift shaft (4) in a rotationally fixed manner and in the closed condition of the roll-up door are arranged partly wound up.
2. A roll-up door according to claim 1, characterised in that the actuation mechanics (5) comprise an electric motor (15) for the drive of the main shaft (8) which preferably is connected to the main shaft (8) via a drive chain (16) or a toothed belt.
3. A roll-up door according to claim 1 or 2, characterised in that the drive belts (11, 12) in the closed condition of the roll-up door are wound up on the main shaft (8) up to a winding diameter of 95 to 100 mm and on the lift shaft (4) up to a winding diameter of 60 to 80 mm.
4. A roll-up door according to one of the preceding claims, characterised in that the actuation mechanics (5) comprises a relief belt (17) which with its end is arranged in a rotationally fixed manner on an axial projection (18) of the main shaft (8), preferably on its side distant to the motor drive, and in the closed condition of the roll-up door is wound up in a manner such that a tension spring (20) arranged between the other end of the relief belt (17) and a fixed point (19) biases the main shaft (8) in the opening rotation direction (21).
5. A roll-up door according to one of the preceding claims, characterised in that the actuation mechanics (5) comprises guide rails (22, 23) which extend essentially vertically on the right and left laterally next to the curtain (1) and that the lift shaft (4) is provided with laterally axially projecting guide pins (24, 25) which engage into the guide rails (22, 23) so that the lift shaft (4) is fixed in the guide rails (22, 23) in the horizontal direction and is guided displaceable in the vertical direction and rotatably.
6. A roll-up door according to one of the preceding claims, characterised in that the curtain (1) in its lower edge region is provided with an essentially horizontally arranged ledge (26).
7. A roll-up door according to claim 6, characterised in that the ledge (26) is provided with laterally axially projecting guide pins (27, 28) which engage into guide rails (22, 23) so that the ledge (26) is fixed in the guide rails (22, 23) in the horizontal direction and is displaceably guided in the vertical direction.
8. A roll-up door according to one of the claims 5 to 7, characterised in that in the region of the two narrow sides of the roll-up door there is arranged in each case one sheet metal profile (29, 30) essentially L-shaped in its horizontal section which extends in the vertical direction over the height of the roll-up door, wherein one limb (31, 32) of the sheet metal profile (29, 30) extending at right angles to the curtain (1) is provided with the respective guide rail (22, 23), and a limb (33, 34) extending parallel to the curtain (1) is provided with a brush ledge (35, 36) bent at an angle towards the curtain (1).
9. A roll-up door according to one of the preceding claims, characterised in that the lift shaft (4) on the inner and outer side of the curtain (1) in each case is enclosed with a protective plate (39, 40) extending along the lift shaft (4), wherein the protective plates (39, 40) at the upper and lower side in each case only spare a slot (41, 42) for the passage of the curtain (1), and that the two protective plates (39, 40) are connected to one another by way of connection parts (43, 44) arranged on the left and right of the curtain (1), wherein the connection parts (43, 44) are rotatably mounted on the lift shaft (4).
10. A roll-up door according to claim 9, characterised in that at least one of the connection parts (43) comprises a rotation limiting part (49, 50) which projects laterally in the axial direction and which engages into a guide (51) arranged laterally of the curtain (1).
11. A roll-up door according to claim 9 or 10, characterised in that there exists an electrical connection between the protective plates (39, 40) and the lift shaft (4) at least via a rotatable mounting (45) of the connection parts (43, 44).
12. A roll-up door according to one of the claims 9 to 11, characterised in that the upper and lower edges of the protective plates (39, 40) bearing on the curtain (1) are in each case provided with curvatures (46) which preferably have a low-friction sliding layer (47).
13. A roll-up door 12, characterised in that the connection parts (43, 44) are connected to the protective plates (39, 40) by screws (48) screwed into the curvatures (46).
14. A roll-up door according to one of the preceding claims, characterised in that the lift shaft (4) comprises two half shells (52, 53) which at half the height are placed onto the front and rear side of the curtain (1) and screwed to one another.
15. A roll-up door according to claim 14, characterised in that the two lateral ends of the half shells (52, 53) are in each case connected to an end piece (13, 14) in a rotationally fixed manner, on which the respective drive belt (11, 12) may be wound and which comprises an axially projecting guide pin (24, 25).
16. A roll-up door according to claim 15, characterised in that the guide pins (24, 25) of the end pieces (13, 14) at their free ends are in each case provided with a securing disk (56).
17. A roll-up door according to one of the claims 15 or 16, characterised in that there is provided at least one end piece (13, 14) with an actuation disk (55) for actuating an end switch.
18. A roll-up door according to one of the claims 15 to 17, characterised in that the connection parts (43, 44) of the protective plates (39, 40) are rotatably mounted on the end pieces (13, 14).
19. A roll-up door according to one of the claims 6 to 18, characterised in that the lower ledge (26) of the curtain (1) comprises two half shells which in the lower edge region are placed onto the front and rear side of the curtain (1) and are screwed to one another.
20. A roll-up door according to claim 19, characterised in that the two lateral ends of the half shells are in each case provided with an axially projecting guide pin (27, 28).
21. A roll-up door according to claim 20, characterised in that in the ground region on the left and right sides of the roll-up door there are arranged two automatic wind safety devices (57, 58) which in each case comprise an essentially right-angled double lever (59) which is mounted at its centre and which is biased by way of a tension spring (62) in a manner such that its upper limb (60) in the horizontal position, with a closed curtain (1), presses the respective guide pin (27, 28) of the lower ledge (26) downwards, with an opening curtain (1) however may be brought by the guide pin (27, 28) into a vertical position beyond the dead point of the spring force, in which it remains fixed by the tension spring (62) and that the now horizontal, lower limb (61) with a closing curtain (1) may be folded downwards by way of the lowering guide pin (27, 28) so that the guide pin (27, 28) after exceeding the dead point of the spring force is pressed downwards by the upper limb (60).

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