EP0897448A1

EP0897448A1 - Sectional gate

Info

Publication number: EP0897448A1
Application number: EP97921846A
Authority: EP
Inventors: Bernd Lucas
Original assignee: Belu Tec GmbH
Current assignee: Belu Tec GmbH
Priority date: 1996-05-02
Filing date: 1997-05-02
Publication date: 1999-02-24
Anticipated expiration: 2017-05-02
Also published as: SK285558B6; DE29724333U1; WO1997042387A1; PL184344B1; ES2152668T3; PL329641A1; US6105312A; DE59702241D1; HUP9901470A2; CZ296828B6; DK0897448T3; EP0897448B1; ATE195791T1; GR3034892T3; SK148698A3; DE29607802U1; HUP9901470A3; PT897448E; CZ345998A3; HU221686B1

Abstract

The counterweight means (50; 50') for a motor or manually-operated sectional gate has a traction mechanism (51; 51') which engages, preferably at the bottom, at one end on a closing member, and at the other end indirectly or directly on an energy accumulator or on a mechanical drive such as a counterweight in such a manner that it is possible to insert the lower closing member (5A) into the horizontal section (7B). The counterweight means (50') also has coupling means such that the traction mechanism (51') engages at one end on a driving part (71) and at the other end indirectly or directly on the energy accumulator or the mechanical drive. A driver (74) which can be automatically disengaged from the driving part (71) when a closing member is not completely open and can be re-engaged therewith during closing is fastened to the closing member. Alternatively, the counterweight means (50) has a deflection pulley (54) for the traction mechanism (51), which pulley is arranged to be stationary close to the upper end of the curved section (7C) and substantially below the horizontal section (7B), with the result that the counterweight means (50) exerts a traction force acting substantially horizontally on the lower closing member (5A) which is substantially in the closed position and a traction force acting substantially vertically by means of the traction mechanism (51) on the lower closing member (5A) which is substantially in the closed position.

Description

Sectional gate

The invention relates to a sectional door according to the preamble of claim 1.

Sectional gates close the door openings of buildings, garages and the like. It is common for the sectional door to consist of more than two plate-shaped locking elements (sections) which are guided in guide rails by means of roller guides. The generally one-piece guide rails each have a vertical section in which the rollers of the closure elements are in the closed position, an adjoining arc section and subsequently a horizontal section in which the rollers of the closure elements are moved for the open position. In most sectional doors, the vertical sections are arranged on both sides of the door opening and relative to the door opening behind the locking elements, so that the rollers have to be attached to the rear of the locking elements. The horizontal sections are fastened under a ceiling or the like of the building to be closed, and the vertical and horizontal sections are connected to one another by means of the arch section. 7/42387 PC17EP97 / 02242

From DE 4006 912 a sectional door is known in which the curved section, the guide rail arranged laterally next to the locking elements, begins at the level of the upper end edge of the clear door opening and in which a weight compensation device is arranged between the guide rail and the door opening and the door drive is driven by a drive Deflection roller of the weight balancing device takes place. Since the arch section lies above the clear door opening, the rollers of all the closure elements are in the closed position in the vertical section of the guide rail. The surrounding building above the gate opening must therefore have a large lintel height, so that these sectional doors can only be used in relatively tall buildings.

From DE-OS 22 28 783 a sectional door is known in which the guide rail is arranged behind the closure elements in relation to the door opening and the guide rails are arranged laterally in the area of the clear opening. The guide rollers arranged behind the closure elements lead the closure elements into the vertical closed position, the uppermost closure element having to be moved from an inclined position into a vertical position by means of an adjusting drive after the closure elements have been completely lowered. In order to make this movement possible, the guide rail has an opening in the curved section through which the guide roller of the uppermost section can be pivoted out of the guide rail.

The opening in the curved section has the disadvantage that when the sections are lowered, the guide rollers of the lower sections can emerge from the opening, which can lead to a defect in the sectional door or a malfunction. Since the guide rails are arranged within the area of the clear door opening and behind the locking elements, the sectional door must have a larger door opening close than usable when open. When opening the sectional door, the upper guide roller must first be moved back into the guide rail before a force can be applied to move the sectional door into the horizontal section.

DE 35 08 957 discloses a sectional door with guide rails arranged behind the locking elements, in which the upper end of the upper locking element is connected to a pivoting lever which, at the end of the closing movement, moves the upper locking element into a vertical position pivots after the upper guide roller hits a stop in order to initiate the pivoting movement of the pivoting element due to the lowering movement of the sectional door. The swivel element is connected to a torsion bar spring which swivels the swivel element back when the door is opened before the top guide roller moves along the guide rails. The pivoting movement of the pivoting element takes place around a fixed pivot point located on the upper edge of the upper section, so that the gate as a whole has to be raised in order to move the upper section into the vertical position.

The object of the invention is to provide a sectional door in which an almost complete utilization of the clear door opening in the open state of the sectional door is possible in a simple manner even with a comparatively low height of the door / gate lintel. Another object of the invention is to enable a vertical position of the upper section in the closed position without the functional safety of the sectional door being restricted during the opening or closing movement.

The above-mentioned object is achieved with a sectional gate according to the subject matter of claim 1. A first preferred weight compensation device has a pulling means known per se, which engages at one end on one, preferably the lower and - particularly preferably - in the vicinity of the lower end of the lower locking element and the other end is fixed in place, for example on the ceiling or the housing wall can, wherein the traction means is guided over a plurality of deflection rollers and a loose roller which can be moved against the restoring force of an energy store or counterweight, and wherein an uppermost deflection roller is arranged in the vicinity of the upper end of the arc section below the guide rail . Such a guidance of the traction means and coupling to the closure elements has the advantage that the force acting on the traction means via the energy store or the counterweight acts on the sectional door until it is approximately or even completely in the horizontal section. The connection between the weight compensation device and the closure elements can also be made detachable by means of carriers - according to a second variant of the weight compensation device.

If the weight compensation device is arranged behind the vertical section of the guide rail, the sectional door lies in the closed position against a boundary wall surrounding the clear door opening, so that the sectional door has advantages visually and in terms of its sealing effect compared to the section known from the prior art ¬ naltoren shows.

The weight compensation device, such as an energy store that can be loaded and unloaded, supports the drive mechanism. It is essential that it is coupled to one of the closure elements in such a way that the lower closure element can also move into the horizontal section as largely as possible in terms of weight. In order to optimize the forces acting on the sectional door via the traction means, one of the deflecting rollers is preferably arranged in such a way that the traction means is guided almost parallel to the vertical rail up to the curved section. The traction means automatically disengages from this deflection roller when the traction means fastening point of the closure element passes this deflection roller in the opening direction. In the opposite direction of movement, the traction means automatically hooks itself into this deflection roller.

In order to do justice to safety aspects, among other things, the weight compensation device is preferably arranged concealed behind a covering which has an outlet opening to the guide rail for the traction means.

It is noted that the weight compensation device according to the invention can also be used in rolling and sectional doors known from the prior art, which do not have a pivoting means for the upper closure element, and are therefore of independent importance.

In the sectional door according to the invention, the guide rails are preferably arranged laterally outside the clear door opening, and the guide means, such as guide rollers, are arranged laterally on the transverse sides opposite the guide rails, ie the end faces of the closure elements. The adjustment movement of the sectional door, in particular the opening / closing movement of the upper closure element, is carried out by hand or by means of a drive mechanism, which acts approximately parallel to the horizontal section of the guide rails, and in each case 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 on the upper closure element at a distance from the upper edge of the upper closure element is articulated. The pivot axis lies below the guide rollers, so that the pivoting means pivots downwards relative to the sectional plane when the gate is closed and upwards when the gate is opened. The pivoting means is of independent inventive importance - even without the presence of a weight compensation device or when using a weight compensation device other than that according to claim 1 - and allows the upper closure element to be pivoted from a pivoted position into a when the door is lowered Closed position and vice versa and becomes automatically active as a result of the actuation of the door drive.

The arrangement according to the invention of the locking elements, guide rails and the pivoting means of the drive mechanism and the weight compensation device ensures that the sectional door according to the invention can be installed even with an extremely low lintel or low ceilings, as well as a compact, only slightly disturbing actuation - Representation arrangement.

To close the clear gate opening, the locking elements are moved into the preferably vertical closed position, the locking elements preferably being guided laterally in the guide rails by guide rollers and deflected from a horizontal open position into a vertical closed position due to the articulated fastening of adjacent locking elements become. As long as the upper closure element is in the horizontal section of the guide rail, the pivoting means, such as the pivoting lever, e.g. B. due to its attachment at a distance from the upper edge, on the upper closure element - until all the closure elements and the lower guide means of the upper closure element are in the vertical rail. By means of the drive mechanism in combination with the pivoting means, the upper closure element pivoted into its final closed position or pivoted back into an inclined position during the opening movement.

The guide rails advantageously form a forced guide for the guide means in order to minimize the required lintel height. If, according to a preferred embodiment, the pivoting means can be positively actuated by means of a positive guide means, guided by at least one of the guide rails, such as a pair of guide rollers, when actuating the door drive, any type of door drive, that is to say lifting by pressing down, is particularly simple possible and reliable.

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

In order to simplify the assembly of the sectional door according to the invention, the horizontal section can be releasably attachable to the arch section. To assemble the sectional door, the sectional door can then be delivered lying within the horizontal section and is only moved into the vertical section when it is attached to the walls located at the side of the door opening, or, if there are no walls, when these are self-supporting mounted on the floor.

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

La shows a sectional door in the open position in a vertical section along the line II-II in FIG. 3B; Fig. Lb of the same sectional door a vertical section along the line lb - lb in Fig. La;

2A shows a section of the same sectional door according to the invention in the closed position;

3A / B the same sectional door in horizontal section along the line IIIA-IIIA and IIIB-IIIB in Figure 1 (detail);

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 for the embodiment according to FIGS. 1 to 3 in the open (FIG. 5A) and closed (FIG. 5B) position and

FIG. 6 shows a sequence of the movement of the upper closure element 5B from a similar sectional door as in FIG. 2 at the beginning of the opening movement.

1 a / b shows a section of a sectional door, designated overall by 100, which is fastened within a building 2 accessible via a door opening 3. For example, a vehicle can be parked inside the building. The sectional gate 100 has a plurality of closure elements 5, of which the closure element shown on the left in FIG. 1 forms the lower closure element 5A of the sectional door and the one shown on the right forms the upper closure element 5B. Closure elements (sections) of sectional gates known from the prior art can be used as closure elements, configurations such as thermal insulation, bearing design, edge seal, optical effects, etc. not being discussed in detail. Adjacent closure elements are connected to one another in an articulated manner, the guide rollers 6, 6A, 6B in the exemplary embodiment shown guiding the closure elements in the guide rail designated overall by 7 and coaxially arranged, for. B. bearings known from DE-GM 94 03 956.9 allow pivoting of the closure elements 5 with respect to one another.

A guide rail 7 and a weight compensation device 50 are arranged on each side of the gate opening 3.

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. It is noted that a horizontal or vertical section means an orientation of these sections which is essentially horizontal or vertical, since slight deviations of the sections of the guide rails from the exact horizontal or vertical position have no influence on the inventive concept .

During assembly, the vertical section 7A is fastened together with the arch section 7C laterally outside the clear gate opening 3 (FIG. 3A / B). The lower guide roller 6A of the lower closure element 5A protrudes - like all other guide rollers - from the end of the closure element 5, so that the closure elements stand one above the other in the closed position parallel to the vertical section 7A of the guide rail. The longitudinal extent of the closure elements 5, ie parallel to the floor 1, is somewhat larger than the width of the gate opening 3, so that a complete closure of the gate opening can be achieved without the guide rails protruding laterally into the clear gate opening. The fastening of a motor-driven drive mechanism and the upper guide roller 6B to the upper closure element 5B can be seen from FIGS. 2 and 3B. On the upper guide roller 6B, a pivot lever 8 is pivotally attached at one end to form a pivot axis 8A. At the other end, the pivot lever 8 is fastened 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, with the formation of a second pivot axis 8B. The pivot lever 8 has a crank, so that in the open position an inner surface 18 of the upper closure element 5B - aligned parallel to the horizontal section - can come into contact with the pivot lever 8, as is shown in FIG. At the upper area of the upper closure element 5B - approximately in the middle - a push rod 13 of an electric drive 12, which is pivotably attached by means of a bolt 15, engages in an eyelet 14 (FIG. 3B).

To open the sectional door, the drive member 11 of the push rod 13, which is guided in a rail 16, moves in the direction of the arrow P, so that the upper closure element 5B is pivoted away from the gate opening 3 into an inclined position (swivel position) about the hinge axis 17 to the next closure element 5, 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 to rest on a support surface 19 of the pivot lever 8. After the upper closure element 5B has pivoted out of the vertical position and has come to rest, the upper guide roller 6B is guided from the curved section 7C of the guide rail into the horizontal section 7B, and the closure elements are raised. The pivoting of the closure elements around the arch can be influenced by the curvature of the arch section 7C, the distance between the swivel joints of the guide means or the guide rollers 6 determines the pivoting movement of the individual closure elements.

To completely close the sectional door, the door drive is moved 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 closure element 5A with its lower roller 6A or a closing edge is placed on the floor 1 has, the upper closure member 5B is pivoted into the vertical position. A horizontally extending sealing lip 20 can be fastened to the upper closure element, so that in the closed position the sectional door closes the door opening 3 in an all-round manner when using vertical seals 21.

The push rod drive can be an electric drive effective along a horizontal rail 16. However, a driven, revolving rope, a revolving chain or other suitable drives can also be used.

5A / B, the required lintel height can be reduced even further by the push rod 13 engaging directly 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 is provided with a pivot bearing 22 for rotatable connection to the push rod 13. If the push rod 13 is the same length or longer than the clear gate opening height, the lintel height can be reduced to zero if the upper edge 9 of the upper closure element 5B is designed accordingly. This is shown in Fig. 5A / B. With reference to FIGS. 1 to 5B, the structure and the 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 a pulling means 51; 51 '. The traction means is e.g. B. on the lower guide roller 6A of the lower closure element 5A or via a rope pulley 52 (FIG. 3A) or via a temporarily effective fastening point 74 (FIG. 4A) to one of the closure elements 5. The traction means is preferably via deflection rollers 53, 54 and 55 to a loose roller 56 and around z. B. led to a hook 57, by means of which the traction means 51 is fastened within the weight compensation device 50 (FIG. 2). A carrier 58 is arranged under the loose roller 56, in which the upper ends of two coil springs 59 engage. The lower ends of the coil springs 59 are wound around a fastening bolt 60 which is fastened on the floor 1 or near the floor (FIGS. 1 and 4A).

The uppermost deflection roller 54 is arranged near the transition of the curved section 7C into the horizontal section 7B and below it (FIGS. 1 and 2; 5A / B), so that the tension element 51 is guided approximately up to the beginning of the horizontal section 7B of the guide rail 7 becomes. The deflection can also be continued along the horizontal section 7B, so that the pull rope does not necessarily have to engage at the lower end of the sectional door in order to be able to be pulled completely into a horizontal position with the aid of the weight compensation device.

The deflecting roller 53 is arranged near the transition of the bow section 7C into the vertical section 7A, so that the pulling element 51, when the closing elements of the sectional door are moved from the closed position into the open position (and vice versa), as long as they are almost parallel to the The vertical section 7A runs until the lower guide roller 6A of the lower closure element 5A reaches the transition between the horizontal section 7B and the curved section 7C. The guidance of the tension element 51 by means of the deflection rollers 53 and 54 should correspond in a first approximation to the course of the curved section 7C, wherein further deflection rollers can be arranged for interpolating this course (not shown).

To assemble the sectional door with weight compensation device, it is advantageous if the curved section 7C and the horizontal section 7B of the guide rail 7 are detachably connected to one another. Since the weight compensation device acts on the lower closure element 5A outside of the guide rail 7, the weight compensation device 50 can be delivered in a preassembled state and fastened next to the guide rail 7, so that only the traction means 51 is attached at its one end to the lower closure element 5A must be fastened while the closure elements are lying on the ceiling in the horizontal section of the guide rail.

After the traction mechanism 51 has been fastened to the lower closure element, a certain pretension in the coil springs 59 can be set at one of the two fastening points 57 or 52 or at a row of holes 62 (FIG. 4A), so that the weight compensation device 50 can be lifted the closure elements optimally supported. For this purpose, the loose roller 56 moves between two extreme positions while tensioning the springs 59 (closing) or downwards while releasing the springs 59 (opening). It is self-evident that the loose roller 56 in the embodiment shown can be raised at least half the movement of the lower guide roller 6A without hindrance, in order not to impair the functionality of the weight compensation device. In the alternative embodiment of the weight compensation device 50 'according to FIG. 4A / B, a driver connection is used instead of a permanent fastening of the tension element. For this purpose, the tension element 51 'is fixed at one end and at the other end to a driving part 71 such as a sleeve, a pin and the like. The driving part 71 can be automatically uncoupled and recoupled from the closure element 5A near the transition between the curved section 7C and the vertical section 7A (or by means of deflection rollers as in the first embodiment near the transition between the curved section and horizontal section) by means of a holding device 73. It holds the driving part 71 in position against the tension of the tension element 59 'when the locking elements are in the open position and a driver 74 and the driving part 71 are not in engagement with one another.

On the side of the lower closure element facing away from the gate opening 3, the driver 74, e.g. a hook is attached, which engages the driving part 71 in the closing movement (downward) of the sectional door and carries it at least parallel to the vertical section 7C while tensioning the weight compensation device 50 '. An arrangement of a loose roller between the two deflection rollers 55 'and 53' according to the embodiment according to FIG. 1 can be used for tensioning the force storage springs.

The weight compensation device is then of particularly simple construction and extends purely vertically. This solution does justice to the fact that the weight force becomes less and less when the door is opened, in particular the fact that a weight compensation device is in itself unnecessary for the last partial opening.

This alternative embodiment shortens and simplifies the assembly of the sectional door since the connection between the tension element and the closure elements is releasable. A defective weight compensation device can be replaced particularly easily. The weight balancing force can also be provided by a counterweight known per se.

The force required to move the closure elements from the closed position into the open position can be predetermined using the spring constants and the spring travel or the number of springs. Pneumatic springs can also be used as springs. The vertical position of the energy accumulator (springs) is only preferred, a horizontal alignment or inclined position is also possible.

4A / B shows a positive guidance which also moves the pivoting means at the upper end region of the upper closure element in a functional manner when the gate drive does not act on the upper end region of the upper closure element; Such a situation arises, for example, when operated manually using a handle in the lower gate area. In this exemplary embodiment, the positive guidance results from the fact that instead of a single guide roller, a pair of guide rollers 6B, 6B 'is fastened to a pivoting lever 8 and the pair of guide rollers is positively guided in the guide rail 7.

Finally, FIG. 6 shows the upper closure element 5B in various phases of its initial opening path and a hold-down device 75 designed as a metal strip against the free end 75A of which the upper closure element 5B can be supported upwards when it is pivoted into its closed position in order to prevent excessive To prevent the locking elements from being lifted by the weight compensation device (positive guidance). The hold-down device 75 is fastened at its right end in the drawing to the guide rail 7 and by means of an elongated hole 76 and a clamp. height adjustable by means of 77. 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 is guided in the flexible guide 102, is pulled downward. The tensile force acting on the lever 104 creates a torque and the upper section 107 tilts backwards into the roller so that the gate can be pushed up. When moving down, after the gate has been pushed completely into the lower end position, the handle 101 again rotates in the opposite direction, so that the push rod 103 moves the lever 104 and thus the section 107, which is mounted in the joint 106, in FIG the vertical position is pressed.

Reference list

1 floor

2 buildings

3 gate opening

5 closure element 5A / 5B

6 guide rollers 6A / 6B / 6B '

7 guide rail 7A vertical section 7B horizontal section 7C arc section

8 swivel levers

9 top edge

10 folding mechanism

11 drive link

12 electric drive

13 push rod

14 eyelet

15 bolts

16 rail

17 axis

18 inner surface

19 support surface

20 sealing lip

21 vertical seals

22 swivel bearings

50 weight balancing device 50 '

51 traction means 51 '

52 pulley

53 deflection roller 53 '

54 pulley

55 pulley 55 '

56 loose roll 56 '

57 hook 57 ' Bracket 58 '

Coil spring 59 '

Mounting bolt 60 '

Cladding

Row of holes

Take-away part

Holding device

takeaway

Hold-down free end

Long hole

Gills

Sectional gate

Handle flexible guidance

Push rod

lever

joint

section

Claims

1. Motorized or manually operated sectional door

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

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

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

the closure elements, relative to the closed position at the top and bottom, have guide means (6), such as guide rollers (6A, 6B), which are arranged laterally on the transverse sides and are guided in single-track guide rails (7), and

- Each guide rail (7) has a vertical section (7A) connected to an arc section (7C) and a horizontal section (7B) and, preferably, is arranged laterally outside the clear gate opening (3) and in which

the weight compensation device (50; 50 ') has a traction means (51; 51') which acts on one end of one, preferably on the lower, closure element and on the other end directly or indirectly on a power store or on a power drive, such as a counterweight that the lower closure element (5A) can be moved into the horizontal section (7B), characterized in that

a) the weight compensation device (50 ') has a coupling means such that the traction means (51') acts on one end on a driving part (71) and on the other end directly or indirectly on the energy accumulator or the power drive, one, preferably the lower, locking element a driver (74) which is automatically decoupled with the driving part (71) in the not yet fully open position of the locking elements and can be coupled again when closed, or that

the weight compensation device (50) has a deflection roller (54) for the traction means (51), which is arranged in a stationary manner near the upper end of the base section (7C) and essentially below the horizontal section (7B), so that the weight compensation device (50) is applied to it a lower locking element (5A) which is essentially in the open position has an essentially horizontally acting tensile force and an essentially vertical acting on the lower locking element (5A) which is essentially in the closed position

Exerts traction by means of the traction means (51), and

b) that a pivoting means of the upper closing element (5B) when the gate is lowered from a pivoting position into a closed position and vice versa, which automatically acts when the gate drive is actuated, is provided as a pivoting lever (8).

Sectional door according to claim 1, characterized in that the weight compensation device (50; 50 ') is relative for opening the gate behind the vertical section (7A) and below the horizontal section (7B) and the arc section (7C) of the guide rail (7).

3. Sectional door according to claim 1 or 2, characterized gekenn¬ characterized in that the weight compensation device (50; 50 ') has a further deflection roller (53; 53') which is arranged such that the traction means (51; 51 ') almost parallel of the vertical section (7A) is guided.

4. Sectional door according to one of claims 1 to 3, characterized in that the weight compensation device (50; 50 ') is covered by a housing, such as a panel (61) _ι , which has a guide rail (7) facing opening for the passage of the traction means (51; 51 ').

5. Sectional door according to one of claims 1 to 4, characterized by a, preferably adjustable, stop for holding down the closure elements (5; 5A; 5B) against the restoring force of the weight compensation device (50; 50 ') in the closed position .

6. Sectional door according to one of claims 1 to 5, characterized in that in each case a pivot lever (8) on one end at an upper guide means (6B) of the upper closure element (5B) and at the other end on the upper closure element at a distance (A) below is articulated from its upper edge (11) to form pivot axes (8A, 8B) such that it is pivoted upwards in the closed position.

7. Sectional door according to one of claims 1 to 6, characterized in that the pivoting means by means of a guided by at least one of the guide rails guide means, such as a pair of guide rollers (6B, 6B '), can be forcibly actuated when the door drive is actuated.

Sectional door according to one of claims 1 to 7, characterized in that the drive mechanism as a push-rod drive (12) which acts on the upper end region of the upper closure element (5B) and acts essentially parallel to the horizontal section (7B) , 13) is formed.