DE10101560A1 - Door of interlinked elements running along sectional guide rail including curved section, traction mechanism, counterweight, pre-tensioning arrangement and deflector. - Google Patents

Abstract

The door-leaf (10) consists of elements (12,14,16,18) behind each other and joined by means of links with axles running at right angles to the door-leaf's direction of movement. A guide-rail (20) arrangement guiding the door-leaf has a second section (22) running parallel with and at right angles to the leaf's opening position and leads, via a curved section (26), into a first section (24) horizontal and parallel with the door-leaf's opening position. Tractive force is exerted on the door-leaf by means of a traction mechanism (40) joined to the leaf. A counter-weight arrangement (30) forces the door-leaf into an opening position. An extra pre-tensioning arrangement (100) tensions that section of the traction mechanism running over a deflector element (48).

Description

The invention relates to a gate with a between a closed position in which it is aligned approximately vertically and an open position in which it is, preferably overhead, is aligned approximately horizontally, movable door leaf, which has a plurality of in its loading direction of movement arranged one behind the other and perpendicular to the direction of movement joints with interconnected door leaf gaps has a guide rails for guiding the door leaf movement Arrangement with at least one guide rail, one over an arcuate Ver in a section approximately horizontally and approximately parallel to the open position of the door leaf passing the first section, approximately vertically and approximately parallel to the locking point tion of the door leaf extending second section, one coupled to the door leaf pelten traction means with which the door leaf from the closed position to the open position urgent tractive force can be exerted on the door leaf and in the closed position  a first section running approximately parallel to the first guide rail section has, which over a section surrounding a deflection element in an approximately parallel passes to the second guide rail section extending section, the train medium with the aid of the deflecting element by approximately perpendicular to the direction of movement of the Door leaf extending deflecting axis is deflected, and possibly a weight same device with which the door leaf at least in the closed position in the direction of Open position is pushed.

Gates of this type are, for example, in the form of garage doors, factory gates or Hall gates used. The door leaf is usually described above NEN formed in several parts, being in the closed position in a vertical plane aligns and is contained in a frame. To open such a gate the door leaf is usually featured along one through the guide rail assembly given web moved into an overhead position in which it is approximately parallel to the ground and extends perpendicular to the wall opening that can be closed with the door leaf. This public The opening movement is usually the same as the closing movement position in the closed position with both sides of the door leaf arranged and with respect to Wall fixed guide rails of the guide rail arrangement as well as on the gate Sheet fixed and guided by the guide rails guide elements, such as Guided roles. This comes especially with devices for closing large wall openings guide rail arrangements with guide rails the first described type for use. Such gates also referred to as sectional gates have the advantage that when they are actuated, no pivoting of the door leaf into the in front of the building to be locked with it, so that a special space-saving actuation of the door leaf is possible.

In particular with the gates explained above, in which the door leaf in the Open position upside down and approximately parallel to the floor, become Er facilitating the opening movement and with regard to the relevant safety precautions usually inscribe tensioning devices or weight balancing devices set which the door leaf at least in the closed position towards the opening urge position, and at least partially balance the weight of the door leaf, all the more so to facilitate the opening movement or to prevent an uncontrolled closing movement.  These biasing devices usually include a mechanical spring, such as such as a tension spring or a torsion spring, which is usually in the form of a Wire rope formed traction means attacks on the door leaf. The traction means and the Biasing device usually arranged so that the biasing device at a Closing movement from the open position to the closed position under the effect of gravity is tensioned with the help of the weight of the door leaf and with the spring tension thus generated The opening movement is supported. For this purpose, the traction device expediently engages on lower edge of the door leaf so that the articulated connections between the individual NEN gate members are not excessively loaded in the course of the opening movement. much it is more possible through this arrangement that the individual goal elements in the course support the opening or closing movement to each other and overall by the attached traction means are held at the bottom of the door leaf.

In the case of conventional gates for halls, warehouses or the like, so-called industrial gates, the front is Clamping device formed in the form of a torsion spring, which is perpendicular to the front given path orbiting spring shaft revolves and overall above that with the gate is arranged to be closed wall opening. The torsion spring is on the one hand the rotatably mounted spring shaft and on the other hand attached to a fixed part. The traction means usually formed in the form of a wire rope is on one on one Axial end of the spring shaft attached to the cable drum rotatably connected and is in Course of the opening movement of the door leaf wound on this cable drum or in The course of the closing movement is processed.

Especially with industrial gates, the opening or Closing movement used a motor, which the rope drum and thus the spring shaft rotates around the spring axis, so as to unwind or represent the traction means from the cable drum on to roll up. In some cases it does not stand above the wall opening to be closed enough space to accommodate the pretensioner and / or the drive unit gates available. It is known that the header is used to solve this problem Direction to the rear end of the feet facing away from the wall opening to be closed The guide rail arrangement is routed and the pulling rope over a near the upper edge or the edge of the wall opening adjacent to the opening position Steering element can be deflected by about 90 °, so that it is between the in this embodiment  cable stream arranged at the rear end of the guide rail arrangement mel and the deflection element approximately parallel to the parallel to the floor above Ren guide rail section runs and in the closed position of the door leaf between the deflection element and the attachment point on the door leaf approximately parallel to the approximately in Direction of gravity running in the area of the side frames of the frame edge of the gate fixed guide rail section is arranged. When operating such Tore has shown that the traction means, especially when executing a lock movement often jumps off the deflecting element. On the one hand, this becomes a control t difficult to close the gate, and on the other hand within the necessary late When the rope has jumped off the slack, hang it slack traction means creates a risk of injury to the user of the gate.

In view of these problems in the prior art, the object of the invention based on providing a gate of the type described in the introduction, which has an increased loading offers drive reliability and safety.

According to a first aspect of the invention, this object is achieved by a Further development of known gates solved, which is characterized in that an additional, d. H. not matching with the possibly existing weight compensation device Clamping device is provided with which the portion encircling the deflection element of the traction device can be tensioned if a during the movement of the door leaf Relative movement between the traction device and the rear En during the closing movement de of the door leaf occurs.

This invention is based on the knowledge that in the course of the movement of the Door leaf from the open position to the closed position and vice versa a Relativbe movement between the ge at the front end of the door leaf during the closing movement coupled traction means and the rear end of the door leaf occur during this movement can, which is due to the fact that the vertical movement of the movement of the front door leaf elements when the following door leaf elements enter the bo Gen-shaped section of the guide rail assembly predominantly in a swivel movement of these door leaf elements with respect to the following still in the area of the hori zontal guide rail sections arranged gate leaf elements is implemented, so  that these still horizontally aligned door leaf elements when entering a door leaf panel mentes in the guide rail section first braked and then when leaving of the arcuate guide rail section are accelerated again. The in Course of the relative movement between moving at a constant speed traction means and the rear end of the door leaf occurring negative and positive Accelerations of the door leaf (braking and accelerating) require forces that must be caught or applied by the door leaf. This leads to correspondence appropriate load fluctuations of the traction device coupled to the door leaf. In the course these load fluctuations, the traction device is alternately tightened and loosened, making it difficult to reliably guide the traction device around the deflection roller, which in turn can lead to the traction device jumping off the deflection roller. this Effect is countered by the inventive development of the known gates works by the load fluctuations of the Traction means is counteracted by an additional biasing device.

In a particularly preferred embodiment of the invention, this is additional che biasing device coupled to the traction means, so that a simple response of the Preload device when a relative movement occurs between the traction means and the rear end of the door leaf is possible. The pretensioning device has the purpose for this moderately on the one hand at the first, d. H. horizontal section of the Traction element fastened and, on the other hand, attachable to the door leaf. If this pretensioning element pushes the door leaf into the closed position when it is in contact with it, in this way, on the one hand, the first, d. H. horizontal section of the train by means of and on the other hand the second, d. H. vertical section of the traction means ge be tensioned because the traction means in most cases to that of the closing movement front end of the door leaf is coupled, so that under the action of the door leaf in the Closing position urging biasing element a tension of the ge to the door leaf coupled second or vertical section of the traction means is generated.

The biasing element can be realized particularly easily if there is one has a compression spring supported on an abutment fastened to the traction means. If the rear end of the door leaf with respect to the Traction device is braked, this compression spring can be in contact with the rear end of the door leaf  arrive and be excited. If the rear end of the door leaf in the course the closing movement is accelerated again after braking, the Restoring force of the compression spring is available to support this acceleration. On in this way a load change in the area of the traction means is prevented particularly reliably changed or reduced, because the generation of the biasing force of the pretensioner immediately telbar is coupled to the relative movement of the door leaf with respect to the traction means.

A further increase in the operational reliability of a door according to the invention can be achieved if the pretensioning device may have an abutment the carrier and attached to the traction means, which via at least one support order is held on the guide rail assembly. In this embodiment According to the invention, the guide rail arrangement is not used to guide the door leaf supply but also for guiding the movement of the additional moving with the traction means Lichen biasing device used. The the carrier on the guide rail assembly holding arrangement can hold at least one in an approximately horizontal guide Rung rail section included guide roller. It also has proved to be favorable if the holding arrangement has at least one, preferably one vertical boundary surface of the horizontally running first guide rails has cutable guide element with which it is prevented that the carrier and / or the biasing device tilts into the first guide rail section. As before already explained in connection with conventional gates, is the traction device Expediently coupled to a drive device which is used to move the door leaf tes is designed between the closed position and the open position. Although in Within the scope of this invention also the use of manually operated drive devices is thought, it has become particularly useful when using gates according to the invention in industrial Area proven to be useful when the drive device has a drive motor has.

It has proven to be particularly favorable if the drive device is connected to the Coupled deflecting element and for generating a rotary movement of the deflecting element around the one that is generally approximately perpendicular to the direction of movement of the door leaf Deflection axis is operable. It has been shown that with this coupling the An Drive device to the deflection, the weight of the in the open position in  generally slightly inclined downward, when closing first or in the Closed position of the bottom door leaf element can suffice to the between the order steering element and the point at which the traction means is attached to this door leaf element, arranged tension member section to tighten and the closing movement of the door leaf to cause corresponding actuation of the drive device. Therefore, with this Arrangement of the drive device in many cases on the provision of an otherwise necessary, additional, the closing movement causing pulling rope who the. The automatic triggering of the closing movement is described in the preferred arrangement of the drive device favors that by the Door leaf in the open position towards weight pushing towards the closed position By force of the first door leaf element during this movement, only that between the order Steering element and the door leaf extending portion of the traction device can be tensioned must, while the rest of the traction means by the deflecting element and on it acting drive device mechanically from under the action of gravity stretched section of the traction device is decoupled and separated by the weight same device or the additional biasing device can be tensioned. there is the automatic triggering of the closing movement of the door leaf when the also favored by the drive device coupled to the deflection element, that because of the automatic tension between the deflecting element and the Ge Weight compensation device or the additional biasing device arranged Ab section of the traction device there is no need for a slack rope safety device, which would otherwise counteract the closing movement.

In the arrangement of the drive device described last, it has also been found proven to be particularly advantageous if the traction means in positive engagement with the Deflection element stands, the traction means in the form of a chain and the deflection element in Form of an associated sprocket or sprocket can be realized because of this way a particularly effective mechanical decoupling between the individual NEN sections of the traction device can be produced and on the other hand a slip free drive is possible. The provision of a slip-free drive is special desirable because such simple control of the drive by detection the rotational movement of the deflecting element is possible.  

The drive device expediently has a coaxial to the deflection axis extending and rotatably connected to the deflection drive shaft. It can to transmit the drive force to the drive shaft a rotatably with the drive shaft connected transmission element, preferably in the form of a chain sprocket are used, this transmission element on the abge the closing element facing outside of the guide rail can be arranged. As particularly cheap it has been found if the deflecting element in the area of the wall opening, ie in un indirect neighborhood to the wall having the opening is arranged, because so that the actuation element that enables manual actuation, such as a hand chain, or an emergency chain also required for engine operation in the immediate vicinity of the public transportation wall can be arranged and not in the middle of the one with the Locking element locked room hangs down.

As explained above, the coupling of the drive device to the Deflector the automatic initiation of the closing movement of the door leaf at ent favored speaking actuation of the drive device or release of the traction means. However, it has been shown that in this embodiment of the invention, the inertia mostly over head and horizontally aligned door leaf due to the weight of the first, at the closing movement, obliquely downwardly inclined door leaf element in some cases can not be overcome, so that an actuation of the Antriebseinrich device does not automatically initiate the closing movement. Because of this, can there is a loosening of the traction means tension when the drive device is actuated, especially in the area between the deflecting element and the attachment point of the Come pulling on the door leaf. This phenomenon, also known as "slack rope" leads to an increase in the risk of injury when operating gates of the beginning mentioned type. In conventional industrial sectional doors with particularly heavy door leaves ters, which due to their inertia have a particularly high persistence in the Having the closed position, this problem is usually caused by the provision solved an additional pull rope with which the door leaf from the closed position to the public transport position can be pulled. The provision of such an additional train seils brings with it the need to provide appropriate guide elements what to increase the assembly effort and the cost of a corresponding gate leads. It is also known that this favors the triggering of the closing movement  can be if turned away at the wall opening to be closed with the door leaf th rear end of the guide rail assembly, a pushing device in the form of a additional compression spring is arranged with a in the open position of the door leaf thrust pushing the door leaf towards the closed position onto the door leaf is practiced. However, it has been shown that even when using such a compression spring the closing movement is not triggered reliably and in particular then to Ab stopping the door leaf movement can come when the individual door leaf elements Pass through arcuate section of the guide rail assembly. Accordingly, the Use of conventional thrust devices with one at the rear end of the guide rail NEN arrangement attached compression spring is not an adequate replacement for the known use an additional pull rope.

According to another aspect of the invention, the above explained problems regarding operational reliability while ensuring an ak acceptable assembly or component expenditure through a further development of the known gates solved, which is essentially characterized in that the door leaf in the direction pushing device pushing towards the closed position, on the one hand, is coupled to the traction means peltes and on the other hand can be applied to the door leaf thrust element.

This aspect of the invention is based on the amazingly simple knowledge back that the closing movement is not just using an additional pull rope can be triggered reliably, but also when the train is needed anyway a push element acting as a driver is attached. This can Aspect of the invention with particular advantage in those already explained above Gates with a drive device acting on the deflecting element are used because the one that runs approximately parallel to the horizontal guide rail section Pull rope section when driving the door in any case in the direction of the closed position the gate is moved, while a loosening of the traction means or a slack rope only in Area of the vertical traction section can occur. From that point of view is the thrust element expediently on the parallel to the horizontal Guide rail section extending traction section attached, so that it is in Act the drive automatically with the movement of the traction system in contact with the Closing movement arrives at the rear end of the door leaf.  

With regard to those occurring in the course of the opening and closing movement Relative movements between the traction device and the rear one during the closing movement The end of the door leaf expediently instructs one on the door leaf Layable contact surface that is parallel to the pulling direction with respect to the traction device extending direction is displaceable. In this case, the additional leader can be direction can be used as a traction device. It has already been explained above that the Traction means of the gate according to the invention expediently at least in the area of a in the course of the movement between the closed position and the open position Steering element surrounding deflection section in the form of a chain with a plurality of is articulated interconnected tension members. In this execution form becomes an Um while ensuring sufficient tensile strength steering of the traction means with particularly small deflection radii. This advantage can can also be achieved in that the traction means in a parallel to the deflection axis direction has a greater width than in a direction perpendicular thereto and perpendicular to Direction of thickness. This is due to the small thickness of the cable created the possibility in the direction perpendicular to the deflection axis redirect the traction means with particularly small deflection radii, while by the large one Width in the direction of the deflection axis, the required tensile strength is made available. In a particularly preferred embodiment of the invention, the deflection cab cut the traction means a plurality of one behind the other in the manner of a chain and with respect to articulated axes running parallel to the deflection axis connected tension members. It has to do with the deployment sufficient tensile strength in the area of the deflecting element is particularly favorable proven if the deflecting section of the traction means a chain, in particular a roller chain with chain rollers running parallel to the deflection axis comprising chain links. In this case, a particularly reliable one Guide of the traction means can be achieved when the deflecting element fits the chain Send sprocket, especially pinion. With formed in the form of a roller chain Traction means can ensure a particularly high tensile strength small deflection radii can be realized because the individual chain links with the help of hinged to the chain rollers and attached to the tooth flanks of the chain sprocket ing connecting elements are interconnected, these connecting elements  without impairing the deflection properties of the roller chain with one for loading the required tensile strength required thickness can be performed.

Although such roller chains are much more expensive than conventional trains However, in the form of wire ropes, the use of these roller chains in total enables a cheaper version of the gate as a whole because of the possible th internal arrangement of the deflection element no additional security measure must be taken.

As explained above in connection with conventional sectional doors tert, the traction device is expediently attached to the that on the door leaf End opposite end to a weight balancer or pretensioner direction coupled with which the door leaf in the closed position via the traction device in Rich device is pushed to the open position, this pretensioning device at least a rotatably mounted spring shaft extending parallel to the deflection axis can have a helical circumferential torsion spring, on the one hand on the torsion spring derwelle and on the other hand befe on a fixed with respect to the wall opening Stigt and in the course of a closing movement of the door leaf from the open position in the closed position is cocked. The traction means in Vorrich invention lines expediently at its end attached to the door leaf opposite put one end on a rotationally fixed with the one facing away from the wall opening rear end of the parallel to the floor guide rail section arranged spring shaft connected and preferably at one axial end thereof arranged winding drum attached to which the traction device in the course of an opening movement tion of the door leaf is wound up. For cost reasons, it is preferred if a to the deflecting section of the traction means preferably the ge entire winding section wound on the cable drum in the course of the opening movement of the traction means is formed in the form of a rope, in particular a wire rope. Execution of the winding section of the traction means in the form of a wire rope also prepares for the required tensile strength when operating gates with particularly heavy door leaves such as about industrial gates no difficulty because the winding drum is behind the rear end arranged parallel to the bottom of the guide rail section and therefore without hindering the movement of the door leaf with a special for winding  thicker wire ropes can be of sufficient diameter. Here is the Ge weight compensation device or, for example, in the form of at least one torso Onsfeder formed biasing device advantageously as well as the winding current mel in the area of the rear end of the guide rail facing away from the open position provided.

For the use of a gate according to the invention with a particularly small one Camber height, d. H. at a particularly low height above the top of the available space to close the wall opening is the second Guide rail section expediently a further guide rail segment assigned, which is on the side facing away from the second section of the first Section or above the first section extends approximately parallel to it and one then in the direction of the edge facing the closed position or includes the upper edge of the wall opening extending end portion, this further Guide rail segment for guiding one on the last during the closing movement Door leaf element and in the closed position top door leaf element fastened guide element serves. The deflecting element is expediently on the section Arranged naltorblatt facing inside of this end portion, the deflection axis lies on the side of the end section facing away from the arcuate section and the deflecting element preferably overlaps the end section at least partially.

In the course of the opening movement, the last one runs through this movement Door leaf element, to which the traction means is attached, part of the arcuate Ab cut the guide rails and moves away from the wall opening. In this Case, a significant tractive force can still be exerted on the door leaf, if the lower edge of the last during the closing movement or in the closed position the bottom door leaf element has already moved away from the wall opening when the order steering element in a direction perpendicular to the wall opening at a distance of the wall opening is arranged. In this case, trouble-free movement of the Door leaf in particular of the closing movement last door leaf element in one of the Closed position approximate position of the door leaf can be ensured that the attached to this door leaf element and from the further guide rail segment guided guide element via a traction means at least in the closed position  receiving slot having fastener on this door leaf element be is consolidated.

The invention will now be described with reference to the drawing obviously all essential to the invention and not highlighted in the description Details are explicitly explained. The drawing shows:

Fig. 1 is a schematic side view of a gate according to the invention,

FIG. 2 shows a detailed view of the deflection area U of the gate according to the invention framed in broken lines in FIG. 1 in the closed position, FIG.

Fig. 3 is a detailed representation of the deflection region in the open position,

Fig. 4 shows a detail of the drive device for the inventive gate,

FIG. 5a is a detailed view of the addi tional biasing means used also as a thrust member of the door according to the invention in a first phase of the closing movement,

Fig. 5b of Fig. 5a corresponding detailed representation in a second phase of the closing movement,

FIG. 5c shows a detailed representation corresponding to FIG. 5a in a third phase of the closing movement and

FIG. 5d shows a further detail view of the pretensioner of the erfindungsge MAESSEN gate.

The sectional door shown in Fig. 1 essentially comprises a door leaf generally designated 10, a guide rail arrangement generally designated 20, a weight compensation or pretensioning device with which the door leaf is urged in the closed position shown in Fig. 1 towards the open position , a total of 40 traction means, via which the weight compensation device 30 is connected to the door leaf 10 , a drive unit, generally designated 50, with which the door leaf can be moved between the open position and the closed position shown in FIG. 1, and a a total of 100 also referred to as a thrust element acting biasing device.

In the embodiment shown in Fig. 1, the door leaf 10 is along a predetermined by the guide rail assembly 20 path between the shown in Fig. 1 shown position, in which it is aligned approximately in a vertical plane, and an opening position in which it is overhead is aligned approximately in a horizontal plane and parallel to the ground. A movement of the door leaf without swiveling into the outside in front of the interior closed with the door leaf is made possible by the fact that the door leaf consists of a total of four door leaf elements or gate members 12 , 14 , 16 and 18 arranged one behind the other along the predetermined path, which is vertical joints which extend to the predetermined path and have joint axes which are preferably formed in the form of hinges are connected to one another.

To guide the door leaf movement, the guide rail arrangement 20 has a guide rail section 22 fastened to a side frame spar 2 (cf. FIG. 2) and running approximately in the direction of gravity, a guide rail section 24 connected to it via an arc-shaped section 26 and an overhead, approximately horizontal guide rail section 24, and another , arranged above the guide rail section 24 and extending in parallel thereto, the guide rail segment 28 , which has at its end facing the wall opening 5 to be closed with the door leaf an end section 29 extending towards the upper edge of the wall opening 5 .

Each of the gate members 12 , 14 and 16 is in the region of its in the closed position obe ren edge with guide rollers 13 , 15 and 17 , respectively, which engage in the guide rail sections 22 , 24 and 26 formed by the guide rail. As shown particularly clearly in Fig. 3, the bottom gate member 12 in the closed position is also out of its lower edge with corresponding guide rollers 11 tet. For reliable guidance of the door panel 2, the guide rail arrangement of the guide rails or guide rail segments shown in Fig. 2 on which of the door are on both sides of the opening 5 on lateral Zargenholmen 2 is attached, is where arranged in the door panel 10 between these guide rails and entspre guiding rollers on both sides with the guide rails.

Guide rollers 19 are being placed at the uppermost in the closed position of gate member 18 which nensegmente in the both sides of the door panel 10 disposed further guide slide engage 28th By the provision of the further guide rail segment 28 and the arrangement of the guide rollers 19 on the gate member 18 is sichge that the wall opening 5 can still be completely closed by the door leaf 10 when the height H is only slightly greater than the clearance h the wall opening 5 , because only the three lower gate members 12 , 14 and 16 are guided along the extending from the lower edge of the wall opening 5 downwards bogeniform gene guide rail section 26 , while the gate member 18 with the help of the additional guide rail segment 28 in the direction of the upper edge of the wall opening 5 is guided.

The weight compensation device of the sectional door shown in FIG. 1 is arranged in the region of the rear end of the guide rail section 24 facing away from the wall opening 5 or of the further guide rail segment 28 . This Ge weight compensation device comprises a perpendicular to the guide rails arrangement 20 predetermined axis 34 axis helically circumferential torsion onsfeder 32 , which on the one hand is mounted on a torsion shaft with respect to the axis 34 rotatably onsfederwelle and on the other hand to a fixed fastener. On at least one end, but preferably on both axial ends of the torsion spring, a rope drum (not shown in the drawing) is attached in a rotationally fixed manner. To the water cable drum, a total of 40 traction means is attached, which extends from the cable drum approximately parallel to the guide rail section 24 and is deflected by means of a deflection element 48 arranged in the region of the upper edge of the wall opening 5 by approximately 90 ° , so that it extends after the deflection element 48 in the direction of gravity approximately parallel to the guide rail section 22 extends. At its end facing away from the cable drum, the traction means 40 is attached to the lower edge of the bottom panel 12 in the closed position . With the traction means 40 , the door leaf is coupled to the torsion spring 32 such that it moves the torsion spring when moving from the open position, in which it is arranged overhead in a horizontal plane, into the closed position shown in Fig. 1, so that the Torsional spring tension forces the door leaf from the closed position to the open position. The spring tension can be adjusted so that the weight of the door leaf is sufficient to overcome the spring tension and to keep the door leaf in the closed position.

In the embodiment of the invention shown in the drawing, the traction means 40 comprises a winding section in the form of a wire cable 42 , which is wound onto the cable drum in the course of the opening movement, and a winding element connected to it via a connecting element or an adapter 44 and in the form of a roller chain 46 formed deflection section which rotates in the course of the door leaf movement the deflection element formed in the form of a corresponding chain sprocket 48 . The roller chain 46 can be deflected while ensuring a particularly high tensile strength with a small deflection radius because the individual chain links can be made from a special tensile rigid material and the articulated connection of the individual chain links enables deflection with any small deflection radii possible is. Therefore, the deflection element formed in the form of a chain sprocket 48 can be designed with a particularly small diameter, so that it can also be arranged at a low camber height, ie with a particularly small difference between the room height H and the passage height h above the upper edge of the wall opening 5 can without hindering the door leaf movement. In the particularly preferred embodiment of the invention shown in FIG. 2, the chain sprocket 48 is arranged on the inside of the guide rail arrangement facing the door leaf 10 above the end section 29 of the further guide rail segment 28 , the chain sprocket 48 engaging over this end section 29 without the movement of the Door leaf 10 and the arranged on the upper edge of the gate member 18 guide roller 19 in this end portion 29 to be. The roller chain 46 forming the deflection section runs between the door leaf 10 and the guide rails 26 and 29 . This profile of the roller chain 46 is in the shown in Fig. 2 embodiment made possible by the guide roller 19 is mounted on a mounted on the gate member 18 roller holder to the door section 18, said roller holder formed 60 a between the gate member 18 and the guide roller 19 Has slot in which the roller chain 46 engages in the closed position. As shown particularly clearly is shown in 3 of FIG., The sprocket is disposed in a direction perpendicular to the wall opening 5 in the direction at a distance from the wall opening 5 48th This ensures that an effective tractive force can still be exerted on the lower edge of the lower gate member in the closed position or during the opening movement of the last gate member via the traction means if this lower edge in the course of the movement along the arcuate guide rail section 26th has already been removed from the wall opening 5 . As indicated schematically in Fig. 1, the Antriebseinrich device 50 of the sectional door according to the invention shown in the drawing is coupled to the deflection element formed in the form of a chain pinion 48 . Can be produced thereby to the perpendicular to the predetermined by the guide rail assembly 20 rail of the door leaf 10 duri Fende guide axle 48 with the aid of the drive device 50, a rotational movement of the sprocket. Due to the positive engagement between the roller chain 46 and the chain sprocket 48 , this rotational movement is transferred to the train medium without slip. Therefore, this form of drive via the chain 46 is a particularly reliable transmission of the driving force to the door leaf. At the same time, with this coupling of the drive device 50 to the traction means 40, a tension of the torsion spring 32 is automatically generated by the rotation of the chain pinion 48 , which in turn automatically leads to a tightening of the traction means 40 between the torsion spring 32 and the deflection element 48 . In addition, with this form of drive it can be achieved that with a corresponding rotation of the deflecting element 48 a closing movement of the door leaf takes place automatically because the weight of the door leaf no longer causes the entire traction means 40 and the torsion spring connected to the traction means, but only that Area of the traction means between the deflecting element 48 and the attachment point on the door leaf must be tensioned, while the remaining part of the traction means is mechanically decoupled from it via the drive device. The drive of the deflecting element 48 can, as in FIG. 4, take place via a drive shaft 52 passing through the side frame spar and a genholme or guide rails arranged on the outer width of the door frame 10 facing away from the door leaf 10 and which is connected via a drive chain 56 to a drive unit , The drive unit can include a motor and / or a manually operated drive chain. Another advantage of the arrangement of the drive device just described is the fact that the drive unit, which must usually have an emergency chain for manual operation even when using a drive motor, near the wall opening 5 aufwei send wall can be arranged so that the Hand chain does not hang down in the middle of the room, but is in any case arranged in the vicinity of the wall opening 5 . As an alternative to the embodiment of the invention shown in FIG. 4, the drive unit can also act directly on the drive shaft 52 without using an additional drive pinion 54 and an additional drive chain 56 .

As can be seen particularly clearly in FIGS. 1 and 5, the additional tensioning device is coupled to the chain 46 in the region of the adapter 44 . As shown in Fig. 5d, the additional biasing device 100 consists essentially of a carrier 110 and a spring 120 supported on an abutment 116 of the carrier 110 .

The carrier 100 is equipped with guide rollers 112 which are included in the further guide rail segment 28 (cf. FIG. 5a). In this way, with a movement of the traction means 40 in the directions indicated by the double arrow A shown in FIG. 5a, the resulting movement of the additional pretensioning device coupled to the traction means is guided along the further guide rail segment 28 . In this case, by the sliding engagement of the reference numbers in Fig. 5D with the Be 114 referred to further guide element on an axis extending in the direction of gravity boundary surface of the further guide rail segment, can be prevented 28 that the carrier 110 approximately rail segment together with the pressure spring 120 in this further Füh tilts 28. A connector 116 and a screw 118 can be used to fasten the carrier 100 to the chain 46 .

In the phase of the closing movement shown in FIG. 5a, the gate member 18 moves straight in the direction of the end section 29 of the further guide rail segment 28, while the gate member 16 just passes through the arcuate section 26 of the guide rail 20 . In this phase, the course of successive goal members is approximately the Ver run of the traction means 40 approximated. The further pretensioning device 100 is arranged such that the compression spring 120 extends approximately parallel to the further guide rail segment 28 and is almost completely relaxed in this phase of the door leaf movement. In the further course of the closing movement, the guide roller 17 leaves the arcuate portion 26 of the guide rail 20 at the upper edge of the gate member 16 while the guide roller 19 has not yet reached the end portion 29 of the further guide rail segment 28 . In this phase of the closing movement, the gate member 18 neither runs parallel to the horizontal section of the traction means 40 nor parallel to the vertical portion of the traction means 40 , but forms the hypotenuse of an approximately right-angled and isosceles triangle, the cathets of which cut from the traction means 40 be formed. Accordingly, the downward movement of the gate member 16 is almost completely implemented in a pivoting movement of the gate member 18 about the guide roller 19 , so that the rear end of the gate member 18 experiences a relative movement with respect to the traction means 40 , in the course of which it is braked. Due to this braking of the rear end of the gate member 18 , a contact surface 122 of the compression spring 120 comes into contact with the rear end of the gate member 18 and is compressed or ge tensioned. Damage to the gate member 18 is prevented in that the gate member 18 is reinforced in the region of its rear end with a reinforcing plate 18 a.

In the in Fig. 5c depicted phase of the closing movement of the fixed to the rear end of the gate member 18 guide roller 19 has 29 of the other guide rail segment 28 reaches the front end of the end portion. This position is reached from that shown in Fig 5b. Illustrated position of the gate member 18 in that this gate element of the gate member is pivoted about the guide roller 17 16 in the course of the downward movement, the rear end of the gate member 18 with respect to the traction means 40 is accelerated. This accelerated movement removes the rear end of the gate member 18 from the compression spring 120 , which in turn relaxes the compression spring.

The braking or acceleration of the rear end of the gate member 18 just described occurs in a similar form when the gate members 12 , 14 and 16 pass through the bo-shaped segment 26 of the guide rail 20 . The compression spring 120 is tensioned each time by abutment on the rear end of the gate member 18 when the rear end of the gate member 18 is braked, and relaxed when this rear end is accelerated with respect to the traction means. This relaxation of the compression spring 120 promotes the acceleration of the rear end of the gate member 18 and thus counteracts a relaxation of the vertically extending portion of the traction means 40 during the phase of the acceleration of the rear end of the gate member 18 . This prevents excessive load fluctuations of the traction device, which could otherwise lead to the traction device 40 jumping off the guide element 48 . On the other hand, the tension of the compression spring 120 does not lead to excessive relaxation of the traction means 40 , because during the braking of the rear end of the gate member 18 it experiences any additional tension due to the acceleration forces that occur, which easily results in a tension of the compression spring 120 can be implemented. This additional tension occurs whenever a guide roller is still in the guide rail section 24 , while the preceding guide roller has reached the guide rail section 22 .

In addition to the function of the additional pretensioning device just explained to avoid load changes in the traction means 40 , this additional pretensioning device can also be used as a thrust element which promotes or triggers a closing movement of the door leaf 10 when the drive device coupled to the deflecting element 48 is actuated. With a corresponding actuation of the drive device, the additional pretensioning device is moved together with the traction means 40 in the direction of the opening 5 and then arrives when the door leaf 10 is not automatically set in motion at the rear end of the door member 18 in order to push it and so To cause the door leaf to close. Such a push is also effected when the door leaf stops in the course of the closing movement, so that overall irregularities in the door travel can be compensated for with the aid of the additional pretensioning device. The contact surface 122 of the compression spring 120 can be displaced in a direction running parallel to the guide rail section 24 to compensate for relative movements between the traction means 40 and the rear end of the gate member 18 . In addition, the compression spring 120 also causes the additional pretensioning device, which now acts as a driver, to strike the rear end of the door member 18 so as to avoid damaging this door member.

The invention is not based on the embodiment explained with reference to the drawing limited. Rather, there is also the use of gates according to the invention with more than four Door leaf elements thought. In addition, the drive in the area of the deflecting element also by a non-positive attack of a drive device on the traction means, such as about by a friction wheel. In addition, the use of traction means is also considered,  in which the deflection section in the form of a toothed belt and / or in the form of several wire ropes running parallel to each other in the pulling direction are realized. Furthermore the additional biasing device can also be an elastic one instead of a compression spring Include element made of an elastomeric material and / or to a guide roller or Grip the guide roller holder of the door leaf.

Claims (14)

1. Gate with a between a closed position, in which it is oriented approximately vertically, and an open position, in which it is oriented, preferably over head, approximately horizontally, movable door leaf, which a plurality of arranged one behind the other in its direction of movement and over Has hinges which are perpendicular to the direction of movement and have joints which are interconnected door leaf elements ( 12 , 14 , 16 , 18 ), a guide rail arrangement which serves to guide the door leaf movement and has at least one guide rail ( 20 ) which extends over an arcuate section ( 26 ) into an approximately horizontal and approximately parallel to the opening position of the door leaf duri fenden first section ( 24 ) passing approximately vertically and approximately parallel to the closed position of the door leaf ( 10 ) extending second section ( 22 ), a to the door leaf ( 10 ) coupled traction means ( 40 ) with the a the door leaf ( 10 ) from the closed position ng in the open position urging tensile force can be exerted on the door leaf ( 10 ) and in the closed position has approximately parallel to the first guide rail section ( 24 ) running first section, which extends over a deflecting element ( 48 ) in a section approximately parallel to the second Guide rail section ( 22 ) passes the second section, and optionally a weight compensation device ( 30 ), with which the door leaf is pushed at least in the closed position in the direction of the open position, characterized by an additional pretensioning device ( 100 ) with which the section surrounding the deflecting element of the traction means ( 40 ) can be tensioned if, during the movement of the door leaf ( 10 ), a relative movement occurs between the traction means ( 40 ) and the rear end of the door leaf ( 10 ) during the closing movement. 2. Gate according to claim 1, characterized in that the pretensioning device ( 100 ) has a pretensioning element ( 120 ) fastened on the one hand to a first section of the traction means ( 40 ) and on the other hand to the door leaf ( 10 ). 3. Gate according to claim 2, characterized in that the biasing element ( 120 ) urges the door leaf ( 10 ) in contact with it in the closed position. 4. Gate according to claim 2 or 3, characterized in that the biasing element ( 120 ) on a fixed to the traction means abutment ( 116 ) supporting compression spring ( 120 ). 5. Gate according to one of the preceding claims, characterized in that the pretensioning device ( 100 ) comprises a support ( 110 ) which may have the abutment and is fastened to the traction means ( 40 ) and is held on the guide rail arrangement ( 20 ) via at least one holding arrangement is. 6. Gate according to claim 5, characterized in that the holding arrangement ( 110 ) has at least one in an approximately horizontally extending guide rail section ( 28 ) on taken guide element, in particular a guide roller ( 112 ). 7. Gate according to claim 6, characterized in that the holding arrangement ( 110 ) has at least one preferably to a vertical boundary surface of the horizontally duri fenden guide rail section ( 28 ) can be applied guide element ( 114 ) with which the carrier ( 110 ) and / or the biasing element ( 120 ) tilts in the guide rail section ( 28 ). 8. Door according to one of the preceding claims, characterized by a drive device coupled to the traction means ( 40 ) for moving the door leaf ( 10 ) between the closed position and the open position. 9. Gate according to claim 8, characterized in that the drive device ( 50 ) has a drive motor. 10. Gate according to claim 8 or 9, characterized in that the drive device is coupled to the deflecting element ( 48 ) and can be operated to generate a rotary movement of the deflecting element about the deflecting axis. 11. Gate according to one of the preceding claims, characterized in that the deflecting element ( 48 ) is in positive engagement with the deflecting element surrounding the deflecting element in the course of the door leaf movement of the traction means ( 40 ). 12. Gate according to claim 11, characterized in that the deflecting section ( 46 ) of the traction means ( 40 ) comprises a chain with chain links arranged one behind the other in the pulling direction and connected to one another in an articulated manner, in particular a roller chain with chain rollers comprising chain rollers running parallel to the deflecting axis , and the deflecting element has a sprocket that fits the chain, in particular chain sprocket. 13. Gate, in particular according to one of the preceding claims, with a between a closed position, in which it is approximately vertically aligned, and an open position, in which it is approximately horizontally aligned, movable door leaf ( 10 ) which a plurality of in its direction of movement has door leaf elements ( 12 , 14 , 16 , 18 ) connected one behind the other and connected to one another via joints which run perpendicular to the direction of movement, one for guiding the door leaf movement, the nending guide rail arrangement with at least one guide rail ( 20 ), which has a curved section ( 26 ) approximately horizontally and approximately parallel to the opening position of the first section ( 24 ), passing approximately vertically and approximately parallel to the closed position of the door leaf, has a second section ( 22 ) coupled to the door leaf traction means ( 40 ) with which the door leaf of the Closed position in the opening position urging pulling force can be exerted on the door leaf ( 10 ), and a pushing device ( 100 ) with which a pushing force pushing the door leaf towards the closing position can be exerted on the door leaf ( 10 ), characterized in that the pushing device has a thrust element ( 120 ) coupled to the traction means and attachable to the door leaf. 14. Gate according to claim 13, characterized in that the closing element ( 120 ) has a contact surface ( 122 ) which can be placed on the door leaf and which can be displaced with respect to the traction means ( 40 ) in a direction running parallel to the direction of pull.