EP0897448B1 - Sectional gate - Google Patents

Abstract

PCT No. PCT/EP97/02242 Sec. 371 Date Mar. 26, 1999 Sec. 102(e) Date Mar. 26, 1999 PCT Filed May 2, 1997 PCT Pub. No. WO97/42387 PCT Pub. Date Nov. 13, 1997A sectional gate assembly to move a sectional gate between an open position and a closed position by an upper and lower closing element. The upper closing element is flexibly connected with the lower closing element, and both the upper and lower closing elements each have a first and a second opposite side and one or more guides which are arranged on each of the first and second opposite sides of the closing elements. The sectional gate assembly includes a first and a second single track guide rail. The first and second guide rails each have a vertical section and a horizontal section connected with a curved portion. One or more of the guides on the upper and lower closing elements are adapted to move within the guide rail. A weight-counterbalancer is included in the sectional gate assembly. The weight-counterbalancer has a traction mechanism which engages at a first end on one of the upper and/or lower said closing elements, and at a second end on an energy accumulator which allows the lower closing element to move into the horizontal section of the rail guides. The weight-counterbalancer also includes a deflection roller for the traction mechanism which is arranged beneath the horizontal section of the rail guides so that the weight-counterbalancer exerts, by way of the traction mechanism, a pulling force that acts generally horizontally on the lower closing element in the gate open position. The pulling force acts generally vertically on the lower closing element in the gate closed position. The sectional gate assembly further includes a mechanism to swivel an upper edge of the upper closing element out of alignment with the guide rails in the closed position. The mechanism includes a pivoting lever attached to the upper closing element and has an arrangement to drive the upper closing element from a first position in the gate open position into a second position in the gate closed position and back to the first position.

Description

The invention relates to a sectional door as it from the Document US-A-1 747 206 is known.

This well-known sectional gate is not the first alternative weight balancing device and that Swinging devices that take effect automatically (Feature b)) of claim 1.

With sectional gates, clear door openings of buildings, Garages and the like locked. It is common that the sectional door consists of more than two plate-shaped Closure elements (sections), which be guided in guide rails by means of roller guides. The usually one-piece guide rails have one vertical section each, in which the rollers the closure elements are in the closed position, one adjoining arch section and subsequently a horizontal section in which the roles of Closure elements for the open position are moved. At Most sectional gates have vertical sections on both sides the gate opening and relative to the gate opening behind the closure elements arranged so that the rollers on the Back of the closure elements must be attached. The Horizontal sections are under a blanket or the like of the building to be locked and the vertical and horizontal section are by means of the arc section connected with each other.

A sectional door is known from DE 40 06 912, at which the arch section, the side next to the closure elements arranged guide rail at the level of the upper End edge of the clear gate opening begins and at a weight compensation device between the guide rail and gate opening is arranged and the door drive via a driven pulley of the weight compensation device he follows. As the arch section above the clear gate opening lies, the roles of all closure elements in the closed position in the vertical section of the guide rail. Therefore, the surrounding building above the Gate opening have a large lintel height, so that this Sectional gates can only be used in relatively tall buildings can.

A sectional door is known from DE-OS 22 28 783, where the guide rail, based on the door opening, is arranged behind the closure elements and the guide rails arranged laterally in the area of the clear opening are. The arranged behind the closure elements Guide rollers guide the closure elements into the vertical closed position, with the top closure element after the closure elements have been completely lowered of an adjustment drive from an inclined position into a vertical position must be moved. To enable this movement has the guide rail in the arc section Opening up through which the guiding role of the top section can be pivoted out of the guide rail.

The opening in the arch section has the disadvantage that when lowering the sections, the guide rollers of the lower ones Sections can emerge from the opening, resulting in a Defect the sectional door or cause a malfunction can. Because the guide rails are within the range of clear gate opening and arranged behind the closure elements the sectional door must have a larger door opening close than usable when open. At the Opening the sectional door must first exactly the upper guide roller be moved back into the guide rail before a force to move the sectional door into the horizontal section can be applied.

From this document, a sectional door is also known in which the upper closure element is pivoted by the door drive when the door is lowered, a guide roller on this element being pivoted into the guide rail through a recess. The pivoting movement is therefore permitted purely passively; through the linkage of the door operator at the upper end of the closure element, the articulation of this element on the adjacent element and the recess in the guide rail.

DE 35 08 957 discloses a sectional door with lateral, guide rails arranged behind the closure elements, in which the upper end of the upper closure element is connected to a swivel lever which is the upper one Closure element at the end of the closing movement in a vertical position pivots after the upper guide roller opens strikes a stop to the pivoting movement of the Swivel element due to the lowering movement of the sectional door initiate. The swivel element is with a torsion bar spring connected, the pivot element when opening the gate swings back before the top leadership role moved along the guide rails. The pivoting movement of the Swivel element takes place around a fixed, on the upper edge the fulcrum located at the top section, making the gate total must be raised to the upper section in the Move vertical position.

The object of the invention is to provide a sectional door create, in which an almost complete utilization of the Clear gate opening when the sectional door is open even with a comparatively low height of the lintel is possible in a simple manner. Another job of Invention is a vertical position of the upper section to enable in the closed position without the functional reliability of the sectional door at the opening or Closing movement is restricted.

The task mentioned at the beginning is done with a sectional gate solved according to the subject matter of claim 1.

A first preferred weight balancer has a pulling means known per se, which ends at one end one, preferably the lower and - particularly preferably - in close to the lower end of the lower, closure element attacks and the other end stationary, for example at the Ceiling or the housing wall, can be attached, which Traction means over several pulleys and a loose roller, the against the restoring force of an energy store or counterweight is movable, is guided, and being a top pulley near the top of the arch section below the guide rail is arranged. Such Guiding the traction device and coupling to the closure elements has the advantage that the energy storage or the counterweight acting on the traction force as long acts on the sectional door until it approaches or even completely in the horizontal section. The connection between the weight balancer and the closure elements can be carried out by means of carriers a second variant of the weight compensation device-too be designed to be detachable.

If the weight balancer behind the vertical section the guide rail is arranged, that is Sectional door in the closed position against the light Boundary wall surrounding the door opening so that the sectional door Visually and from its sealing effect advantages compared to the sectional doors known from the prior art shows.

The weight balancer, like an up and down unloadable energy storage, supports the drive mechanism. It is essential that they are so with one of the closure elements is coupled that the lower closure element as far as possible weight balanced in the horizontal section can drive in.

To act on the sectional door via the traction mechanism To optimize forces, one of the deflection rollers is preferred arranged such that the traction means up to the arc section is guided almost parallel to the vertical rail. Out this pulley automatically disengages the traction device, if the traction device attachment point of the closure element this deflection roller happens in the opening sense. In reverse The traction mechanism automatically hangs again into this pulley.

In order, among other things, to meet security aspects too the weight compensation device is preferred concealed behind a panel that has an outlet opening towards the guide rail for the traction mechanism having.

In the sectional door according to the invention, the guide rails are preferably laterally outside the clear door opening arranged, and the guide means, such as guide rollers, are laterally opposite the guide rails Transverse sides, i.e. the end faces of the closure elements, arranged. The adjustment movement of the sectional door, especially the opening / closing movement of the upper one Closure element, preferably by hand or by means of one approximately parallel to the horizontal section of the guide rails acting, drive mechanism and each a pivoting means, such as a pivoting lever, which ends on the upper guide means of the upper closure element and at the other end at a distance from the upper closure element from the upper edge of the upper closure element is articulated. The swivel axis is below the guide rollers, so that the pivot means when Closing the gate downwards relative to the sectional level pivots and up when opening. The swivel means is too without the presence of a weight balancer or when using another weight compensation device than that according to claim 1 - of independent inventive meaning and allows pivoting of the upper closure element when the gate is lowered from a swivel position into a closed position and vice versa and becomes automatic as a result of operating the gate operator effective.

Due to the arrangement of the closure elements according to the invention, Guide rails and the pivoting means of the drive mechanism and the weight balancer is achieved that the sectional door according to the invention even at extreme low lintel or low ceilings can as well as a compact, only slightly disruptive actuation arrangement represents.

The closing elements are used to close the clear gate opening in the preferred vertical closed position moves, the closure elements preferably of guide rollers guided laterally in the guide rails and due the articulated fastening of adjacent closure elements from a horizontal open position to a vertical one Closed position can be deflected. As long as the top Locking element in the horizontal section of the guide rail is located, the pivot means, like the Swivel lever, e.g. B. due to its attachment in one Distance from the upper edge, on the upper closure element from - until all the locking elements are in place and the lower guide means from the upper closure member located in the vertical rail. By means of the drive mechanism in combination with the swiveling means upper closure element in its final closed position pivoted or during the opening movement from this into a tilted position pivoted back.

The guide rails are advantageous for minimization the required headroom is a forced guide for the guide means. If, according to a preferred embodiment, the pivot means by means of one of at least one of the Guide rails guided positive guidance means, such as one Pair of guide rollers when actuating the door drive can be operated, any type of door drive, so also lifting by hand, in possible in a particularly simple and reliable manner.

In a preferred embodiment is a drive mechanism as a motor-driven push rod drive educated.

To the assembly of the sectional door according to the invention simplify, the horizontal section can be detachably attached to the Be bow section attachable. For mounting the sectional door can then the sectional gate within the horizontal section are delivered lying down and will only be available in the Vertical section moves when this to the side of the Walls are attached to the gate opening, or, if there are no walls if they are self-supporting on the Floor mounted are supported.

Fig. 1a

ein Sektionaltor in Offenstellung im Vertikalschnitt entlang der Linie II-II in Figur 3B;

Fig. 1b

von demselben Sektionaltor einen Vertikalschnitt entlang der Linie Ib - Ib in Fig. la;

Fig. 2A

einen Ausschnitt desselben erfindungsgemäßen Sektionaltores in Schließstellung;

Fig. 3A/B

dasselbe Sektionaltor im Horizontalschnitt entlang der Linie IIIA-IIIA sowie IIIB-IIIB in Figur 1 (ausschnittsweise);

Fig. 4A/B

eine alternative Ausführungsform der Gewichtsausgleichseinrichtung in Schluß-(Fig. 4A) und Offen- (Fig. 4B) Stellung;

Fig. 5A/B

eine Variante eines Sektionaltores zu der Ausführungsform nach Figuren 1 bis 3 in Offen-(Fig. 5A) und Schließ-(Fig. 5B) Stellung sowie

Fig. 6

von einem ähnlichen Sektionaltor wie in Fig. 2 eine Sequenz der Bewegung des oberen Verschlußelementes 5B am Anfang der Öffnungsbewegung.

Further advantages and refinements of the invention emerge from the subclaims and are apparent from the following description with reference to the drawing, in which:

Fig. 1a

a sectional door in the open position in vertical section along the line II-II in Figure 3B;

Fig. 1b

from the same sectional gate a vertical section along the line Ib - Ib in Fig. La;

Figure 2A

a section of the same sectional door according to the invention in the closed position;

3A / B

the same sectional gate in horizontal section along the line IIIA-IIIA and IIIB-IIIB in Figure 1 (in sections);

Fig. 4A / B

an alternative embodiment of the weight compensation device in the closed (FIG. 4A) and open (FIG. 4B) position;

5A / B

a variant of a sectional door to the embodiment of Figures 1 to 3 in the open (Fig. 5A) and closed (Fig. 5B) position and

Fig. 6

from a sectional door similar to that in Fig. 2, a sequence of movement of the upper closure element 5B at the beginning of the opening movement.

1 a / b is an overall section Shown with 100 sectional door shown inside of a building 2 accessible via a gate opening 3 is. For example, inside the building Vehicle to be parked. The sectional gate 100 has several Closure elements 5, of which the one shown in Fig. 1 on the left Closure element the lower closure element 5A of the Sectional doors and the one shown on the right is the upper locking element 5B forms. As closure elements can from the Closure elements (sections) known from the prior art Sectional gates are used, focusing on configurations such as thermal insulation, bearing design, edge seal, optical Effects etc. is not discussed in detail.

Adjacent closure elements are articulated with one another connected, the guide rollers in the embodiment shown 6, 6A, 6B a guiding of the closure elements in of the guide rail designated 7 overall and coaxial arranged, e.g. B. from DE-GM 94 03 956.9 known bearings allow pivoting of the closure elements 5 with each other.

There is a guide rail on each side of the door opening 3 7 and a weight compensation device 50 are arranged.

The continuous, d. H. single-track guide rail 7 has a vertical section 7A, a horizontal section 7B and an arc section 7C which merge into one another, on. It is noted that with horizontal or vertical section an orientation of these sections is meant which is essentially horizontal or vertical, since it is small Deviations of the sections of the guide rails from the exact horizontal or vertical position has no influence on the Have inventive ideas.

When assembling, the vertical section 7A is put together with the arc section 7C laterally outside the clear Gate opening 3 (Fig. 3A / B) attached. The lower leader 6A of the lower closure element 5A protrudes - like all of them other guide rollers - from the front of the closure element 5 out so that the closure elements in the Closed position parallel to the vertical section 7A of the guide rail stand on top of each other. The longitudinal extent of the Closure elements 5, d. H. parallel to floor 1 is something larger than the width of the gate opening 3, so that a complete Closing the gate opening can be achieved without the guide rails protrude laterally into the clear door opening.

2 and 3B is the attachment of a motor-driven Drive mechanism and the upper guide roller 6B on the upper closure element 5B. On the top Guide roller 6B is a pivot lever 8 at one end under Formation of a pivot axis 8A pivotally attached. Other end is the pivot lever 8 at a distance A from the upper Edge 9 of the upper closure element 5B by means of a Folding mechanism 10, for example a hinge, under Formation of a second pivot axis 8B attached. The Swivel lever 8 has an offset, so that in the open position an inner surface 18 of the upper closure member 5B - aligned parallel to the horizontal section - on the Swivel lever 8 can come to rest, as shown in Fig. La is. At the upper area of the upper closure element 5B - approximately in the middle - a means engages in an eyelet 14 a pin 15 pivotally attached push rod 13 one Electric drive 12 on (Fig. 3B).

To open the sectional door, it moves in one Rail 16 guided drive member 11 of the push rod 13 in Arrow direction P, so that the upper closure member 5B around the Hinge axis 17 to the next closing element 5 from the gate opening 3 swung away into an inclined position (swivel position) is without the pivot axis 17, and thus the lower closure elements must be raised. The upper Edge 9 of the upper closure element 5B comes on a support surface 19 of the pivot lever 8 for contact. After that upper closure element 5B pivoted out of the vertical position and has come to rest, the top leadership role 6B from the arc section 7C of the guide rail out into the horizontal section 7B, and the closure elements are raised. The pivoting of the closure elements around the bow can be caused by the curvature of the Arc section 7C are affected, the distance of the Swivel joints of the guide means or guide rollers 6 determines the pivoting movement of the individual closure elements.

To completely close the sectional door the door drive moves in the opposite direction of the arrow P so that after the lower closure elements are in the vertical section 7A of the guide rail and the lower one Closure element 5A with its lower roller 6A or one Has closing edge placed on the bottom 1, the upper closure element 5B is pivoted into the vertical position. On the upper closure element can be a horizontally extended Sealing lip 20 to be attached so that in the closed position the sectional door the door opening 3 when using vertical seals 21 seals all around.

The push rod drive can be along a horizontal Rail 16 effective electric drive. It can but also a driven, revolving rope, a revolving one Chain or other suitable drives can be used.

In the alternative to Fig. 2 embodiment according to Fig. 5A / B can still the required headroom be further reduced that the push rod 13 immediately engages on the upper edge 9 of the upper closure element 5B. In this case, an existing joint or guide roller holder on the upper edge 9 of the upper Closure element 5B with a pivot bearing 22 for rotatable Provide connection with the push rod 13. If the Push rod 13 the same length or longer than the clear gate opening height fall height can be reduced to zero be when the upper edge 9 of the upper closure member 5B is designed accordingly. This is in Fig. 5A / B shown.

Referring to Figs. 1 to 5B, the following the structure and function of the weight compensation device 50; 50 'explains: The guide rail 7 preferably runs between the gate opening 3 and the weight compensation device, which preferably uses a rope as pulling means 51; 51 '. The traction means is e.g. B. on the lower guide roller 6A of the lower closure element 5A or over a pulley 52 (Fig. 3A) or via a temporary one other attachment point 74 (FIG. 4A) on one of the Closure elements 5 attached. The traction device is preferred via deflection rollers 53, 54 and 55 to a loose roller 56 and around this z. B. led to a hook 57, by means of which the traction means 51 within the weight compensation device 50 is attached (Fig. 2). Under the loose roll 56 is arranged a carrier 58 in which the upper ends attack two coil springs 59. The lower ends of the Coil springs 59 are wrapped around a fastening bolt 60, attached to the floor 1 or near the floor is (Figs. 1 and 4A).

The top pulley 54 is near the transition of the Arc section 7C in the horizontal section 7B and below the same arranged (Fig. 1 and 2; 5A / B), so that the Traction element 51 approximately until the beginning of the horizontal section 7B of the guide rail 7 is guided. The redirection can also continue along the horizontal section 7B, so that the pull rope is not necessarily at the lower end of the Sectional doors must be attacked by - supported by the Weight compensation device - completely in a horizontal position to be able to be pulled.

The deflection roller 53 is near the transition of the arc section 7C arranged in the vertical section 7A so that the tension element 51 when the closure elements of the sectional door from the closed position to the open position (and vice versa) as long as they are almost parallel to the Vertical section 7A extend until the lower guide roller 6A of the lower closure element 5A the transition between Horizontal section 7B and arc section 7C reached. The Guiding the tension element 51 by means of the deflection rollers 53 and 54 is intended in a first approximation to the course of the arc section 7C, with further deflection rollers for interpolation this course can be arranged (not shown).

For mounting the sectional door with weight compensation device it is beneficial if the arch section 7C and the horizontal section 7B of the guide rail 7 are releasably connected. Because the weight balancer outside the guide rail 7 on the attacks lower closure element 5A, the weight balancer 50 delivered in pre-assembled condition be and next to the guide rail 7, so that only the traction means 51 with one end at the bottom Closure element 5A must be attached while the closure elements in the horizontal section of the guide rail to be attached lying on the ceiling.

After the traction mechanism 51 on the lower closure element a certain amount of preload in the Coil springs 59 at one of the two attachment points 57 or 52 or on a row of holes 62 (FIG. 4A) be so that the weight balancer 50 the Raising the fastener optimally supported. To the loose roller 56 moves under tensioning of the springs 59 between two extreme positions high (closing) or below Relax the springs 59 down (open). It goes without saying that the loose roller 56 in the embodiment shown at least half the movement of the lower one Guide roller 6A can be lifted without hindrance, the functionality of the counterbalance device not to interfere.

In the alternative embodiment of the weight compensation device 50 'according to FIG. 4A / B is used instead of one permanent attachment of the tension element a driver connection used. For this purpose, the tension element 51 'is at one end fixed and at the other end to a driving part 71 like one Fixed sleeve, a pin and the like. The driving part 71 is near the transition between the arc section 7C and the vertical section 7A (or can by means of pulleys such as in the first embodiment near the transition between Arc section and horizontal section) by means of a holding device 73 automatically removed from the closure element 5A and connectable again. It holds the driving part 71 against the tension of the tension element 59 'in position when the Closure elements are in the open position and one Driver 74 and the driving part 71 not in each other Are intervention.

On the side of the lower side facing away from the gate opening 3 Closure element is the driver 74, e.g. a catch, attached, the driving part 71 in the closing movement (downwards) of the sectional door and at least parallel to the vertical section 7C by tensioning the weight balancer 50 'carries. For tensioning the energy storage springs can be an arrangement of a loose roll between the two guide rollers 55 'and 53' according to the embodiment be used according to Figure 1.

The weight compensation device is then special simply constructed and extends purely vertically. This Solution is getting less and less when opening the gate weight, especially the fact that at the last partial opening a weight compensation device is in itself unnecessary.

This alternative embodiment is shortened and simplified the assembly of the sectional door as the connection detachable between the tension element and the closure elements is. An exchange of a defective balance device can be done particularly easily. As well can the weight balancing force from a known Counterweight will be provided.

About the spring constants and the spring travel or the Number of springs, the force can be predetermined is necessary, the closure elements from the closed position to move to the open position. As feathers too Pneumatic springs are used. The vertical position of the Energy storage (springs) is only preferred, a horizontal orientation or inclined position is also possible.

From Fig. 4A / B a positive guidance can be seen even then the pivoting means at the upper end area of the upper one Closing element moves in a functional manner when the door drive not at the upper end area of the upper closure element attacks; such a situation arises, for example with a manual operation using a handle in the lower gate area. The forced control results from this Embodiment in that instead of a single guide role a pair of guide rollers 6B, 6B 'on a pivot lever 8 is attached and the pair of guide rollers in the Guide rail 7 is positively guided.

6 shows the upper closure element 5B in different phases of its initial opening path and a hold-down 75 designed as a metal strip against its free end 75A is the upper closure element 5B can support upwards when it is in its closed position is pivoted in to excessive lifting of the Locking elements through the weight compensation device prevent (forced operation). The hold-down 75 is on his in the drawing right end on the guide rail 7 attached and by means of an elongated hole 76 and a clamping means 77 height adjustable. The hold-down serves at the same time as a push-up protection.

According to a further embodiment according to FIG. 7 the handle 101 is rotated manually and thereby the push rod or the displacement element 103, which in the flexible Guide 102 is guided, pulled down. By on The pulling force acting on the lever 104 creates a torque and the upper section 107 tilts backwards into the roller, see above that the gate can be pushed up. When shutting down takes place after the gate has been pushed completely into the lower end position is, in turn, a rotary movement of the handle 101 in the opposite direction, so that the push rod 103 the Lever 104 and thus the section 107, which is mounted in the joint 106 is pushed into the vertical position.

Reference list

1

ground

2nd

building

3rd

Gate opening

5

Closure element 5A / 5B

6

Guide rollers 6A / 6B / 6B '

7

Guide rail

7A

Vertical section

7B

Horizontal section

7C

Arch section

8th

Swivel lever

9

Upper edge

10th

Folding mechanism

11

Drive link

12th

Electric drive

13

Push rod

14

eyelet

15

bolt

16

rail

17th

axis

18th

Inner surface

19th

Support surface

20th

Sealing lip

21

Vertical seals

22

Swivel bearing

50

Weight balancing device 50 '

51

Traction means 51 '

52

Rope pulley

53

Deflection roller 53 '

54

Pulley

55

Pulley 55 '

56

loose roll 56 '

57

Hook 57 '

58

Bracket 58 '

59

Coil spring 59 '

60

Mounting bolt 60 '

61

Cladding

62

Row of holes

71

Take-away part

73

Holding device

74

Carrier

75

Hold-down

75A

free end

76

Long hole

77

Clamping means

100

Sectional gate

101

Handle

102

flexible leadership

103

Push rod

104

lever

106

joint

107

section

Claims (8)

1. A sectional door operated by a motor or by hand,

   with at least one upper closure element (5B) and one lower closure element (5A) for closing a clear door opening (3) in the closed position of the closure elements (5; 5A, 5B), and

   with a weight-compensating device (50; 50'), in which

   adjacent closure elements are connected to one another in an articulated manner,

   the closure elements, with respect to the closure position at the top and bottom, are provided on the transverse sides with guiding means (6), such as guide rollers (6A, 6B), arranged at the sides and guided in single-track guide rails (7), and

   each guide rail (7) is provided with a vertical portion (7A) connected to an arcuate portion (7C) and a horizontal portion (7B) and is preferably arranged laterally outside the clear door opening (3), and in which

   the weight-compensating device (50; SO') is provided with a traction means (51; 51') which engages at one end on a closure element, preferably on the lower closure element, and at the other end directly or indirectly on a power accumulator or on a power drive, such as a counterweight, in such a way that it is possible for the lower closure element (5A) to be inserted into the horizontal portion (7B),

   in which

   a) the weight-compensating device (50') is provided with a coupling means in such a way that the traction means (51') engages at one end on an entrainment part (71) and at the other end directly or indirectly on the power accumulator or on the power drive, wherein an entrainment means (74), which can be automatically uncoupled from the entrainment part (71) in the still not fully opened position of the closure elements and which can be coupled again during closure, is secured to a closure element, preferably to the lower closure element, or in which
   the weight-compensating device (50) is provided with a reversing roller (54)-arranged stationary close to the upper end of the arcuate portion (7C) and substantially below the horizontal portion (7B) - for the traction means (51), so that the weight-compensating device (50) exerts a traction force acting substantially horizontally upon the lower closure element (5A) arranged substantially in the open position and a traction force acting substantially vertically upon the lower closure element (5A) arranged substantially in the closed position by means of the traction means (51), and

   b) in which a pivoting means, such as a pivoting lever (8), is provided, which permits pivoting of the upper closure element (5B) from a pivoting position into a closed position when the door is lowered and vice versa and which automatically becomes effective when the door drive is actuated.
2. A sectional door according to Claim 1, characterized in that the weight-compensating device (50; 50') is arranged - relative to the door opening - behind the vertical portion (7A) and below the horizontal portion (7B) and the arcuate portion (7C) of the guide rail (7).
3. A sectional door according to Claim 1 or 2, characterized in that the weight-compensating device (50; 50') is provided with a further reversing roller (53; 53') which is arranged in such a way that the traction means (51; 51') is guided substantially parallel to the vertical portion (7A).
4. A sectional door according to one of Claims 1 to 3, characterized in that the weight-compensating device (50; 50') is covered by a casing, such as a covering (61), which is provided with an opening directed towards the guide rail (7) for the passage of the traction means (51; 51').
5. A sectional door according to one of Claims 1 to 4, characterized by a stop, preferably adjustable, for holding down the closure elements (5; 5A; 5B) against the restoring force of the weight-compensating device (50; 50') in the closed position.
6. A sectional door according to one of Claims 1 to 5, characterized in that one pivoting lever (8) is articulated in each case at one end to an upper guide means (6B) of the upper closure element (5B) and at the other end to the upper closure element at a distance (A) below the upper edge (9) thereof so as to form pivot axes (8A, 8B) in such a way that it pivots downwards relative to the sectional plane during closure and upwards during opening.
7. A sectional door according to one of Claims 1 to 6, characterized in that the pivoting means can be forcibly actuated by means of a forcible guiding means, such as a pair of guide rollers (6B, 6B'), guided by at least one of the guide rails during the actuation of the door drive.
8. A sectional door according to one of Claims 1 to 7, characterized in that the drive mechanism is constructed in the form of a connecting-rod drive (12, 13) engaging preferably on the upper end region of the upper closure element (5B) and acting substantially parallel to the horizontal portion (7B).

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