EP3045643B1 - Gate leaf - Google Patents

Description

The invention relates to an overhead door with a door leaf and lateral guide rails, which have a substantially vertical portion and a substantially horizontal portion with arc portion connecting therebetween, wherein the door leaf is arranged in the guide rails so as to be displaceable, wherein at the ends of the substantially horizontal portions of Guide rails a Endlagendämpfungseinrichtung is arranged.
By the DE 75 40 330 U1 a braking device for overhead doors has become known through which the swing gate brakes soft at the top stop and is held in this position. The braking is achieved by an end stop in conjunction with a leaf spring whose effective spring force is adjustable by a screw.
An attenuator, which is attached to the free end of a belt in one or two catching devices, are the DE 32 06 813 C1 again.
In the DE 20 2005 006 255 U1 a Schwingtor is described which has an energy storage device in the form of a spring buffer at the free end of each track. In an analogous manner, such a spring-loaded buffer is also the LU 90 915 A1 removable.
A Lamellentor, which is guided in lateral guide rails, discloses the EP 1 076144 A2 , To decelerate the louver gate in the closed position spring arrangements are provided with at least one pair of tension springs within the guide rails on each side, which are supported on one side building firm.
End position damping devices are well known in the case of gates. They are designed as compression springs, so as to be in a driving into the end position of the opening position door leaf To be able to perform damping on impact. Such a damping device thus protects the door leaf and the guide rails from damage. Through the use of compression springs, which are guided on a pipe or a rod, this type of construction creates an unreasonable noise nuisance.
The object of the invention is for an overhead door with a door leaf to create a mechanically operating Endlagendämpfungseinrichtung, which is easy to manufacture and usable for different Torgrößen and different types of drives.
The object of the invention is achieved by the features of claim 1. The dependent claims provide a further embodiment of the inventive concept again. End-position damping devices are in the case of gates in an embodiment as overhead door, which are automated by a drive, basically there to the fact that the opening process by the start of the door leaf against a stop existing kinetic energy is eliminated. If this were not carried out, it could come during the opening phase of the door leaf, for example, in a hard stop, to damage the opening mechanism.
In manually operated gates, the door leaf is opened by hand and pushed into its open position. In such a goal, the end position damping device is used as a kind of stop and forms a backup of the door leaf in its open position. Of course, in this application, the end position damping device with its damping device bring out the door leaf from its open position, but there is no storage of the starting forces.
The present invention is operational for both uses. In the following description, however, the automated training will be described.
It is a Endlagendämpfungseinrichtung used according to the invention, which includes a device having a damping element, the design of which does not decrease when hitting the opening door leaf, as in the prior art, but is increased. According to the invention, the device is designed as a tension spring, which eliminates the kinetic energy contained in the impact of the door leaf by increasing its length extension and can store at the same time. By using tension springs, the damping travel is not as limited as with compression springs, because compression springs have only a limited damping distance, because the spring travel through the against each other abutting turns can be blocked, in such a case no damping effect is given.

The tension spring element absorbs when striking the door leaf on the device for cushioning, the kinetic energy contained in the moving door leaf and stores them simultaneously.

The end position damping device is also used in addition to the above-described use to exercise as traction help in the closing operation of the door leaf from the open position support in the form of traction. The kinetic energy of the door leaf received within the end position damping device during the opening process is stored as static energy after the end of the opening process in the end position damping device. This is possible because the drive of the door leaf causes a blockage of the door leaf in the open position. At the initiation of the closing process, this blockage is canceled and at the same time, the at least one end-position damping device releases the previously stored energy by generating a starting aid on the door leaf. The Endlagendämpfungseinrichtung presses against the upper end of the door leaf and pushes this, with the aid of the drive, out of the park position. Thereafter, the Endlagendämpfungseinrichtung resumes its basic position and can store the kinetic energy of the approaching door leaf again in the next opening process. Since the Torgrößen turn out to be different sizes, it is possible in the Endlagendämpfungseinrichtung easy to replace the devices used the energy storage, so as to be able to perform a simple adaptation to a variety of Torgrößen. The housing of the damping device always remains the same.

In the end position damping device, depending on the size of the door leaf to be moved, the spring characteristic of the door size can be adjusted. It is also possible that tension spring elements are used as Duplexfederelemente with two nested tension springs.

In a further embodiment not according to the invention, it is also possible to use mechanical shock absorbers. Furthermore, the end-position damping device according to a non-inventive embodiment may also include an elastic polymer element.

The above-described various end position damping devices are housed within a housing. These devices can easily perform a translational movement upon impact of the door leaf end and then relax again when returning the door leaf to its normal position. A suitable housing may be round, square or rectangular, depending on the use of the end position damping device. While the known in the prior art damping devices have a stop located in front of the head, here again, the invention takes a different route. For this, the housing has an open passage in its longitudinal direction. From the passage, a stop protrudes, which is connected to the device. Such a stop is preferably formed of a hard rubber material or other suitable material on the tread surface of the door leaf.
By means of this design of the end-position damping device, it is possible to attach these laterally to the essentially horizontally extending sections of the guide rails by means of mounting brackets. This has the particular advantage that depending on a wide variety of door sizes and the Endlagendämpfungseinrichtung can be accurately placed. Furthermore, a light replacement or retrofitting is possible by the chosen construction. This is not possible with known spring buffers, as they are mounted on crossbeams between the horizontal sections of the guide rails.

According to the invention, the device with the damping element end fastenings. In the housing by a protective tube interconnected guide pieces are present. On the protective tube at the same time the side protruding from the housing stop is attached. In this case, the tension spring element is substantially enveloped by the protective tube in the parking position. The tension spring element is fastened in one of the guide pieces, next to the stationary attachment.

To prevent noise development, the housing may be formed inside or outside with a damping material for structure-borne noise reduction. Likewise, the protective tube can also be lined with such materials, for example a plastic tube, inside.

In the case of the damping device, the end configuration can always be designed differently using the same housing. In a first preferred embodiment, the closure of the housing offers at the end the possibility of simultaneously carrying out the fastening of one end of the tension spring element via the mountings for attachment to a guide rail. Since both ends are made the same with their attachments, it is possible that such end-position damping means can be used on both the right and left side in guide rail assemblies with the same components.

Fig. 1

Eine perspektivische Darstellung einer ersten bevorzugten Ausführung einer Endlagendämpfungseinrichtung;

Fig. 2

wie Figur 1, jedoch in einer rückseitigen Betrachtung;

Fig. 3

ein Gehäuse für eine Endlagendämpfungseinrichtung;

Fig. 4

einen Teilausschnitt einer Befestigungsmöglichkeit eines Zugfederelementes;

Fig. 5

einen weiteren Teilausschnitt nach Figur 4;

Fig. 6

eine perspektivische Darstellung der innerhalb der Dämpfungseinrichtung vorhandenen Vorrichtung;

Fig. 7

wie Figur 6, jedoch in einer rückseitigen Betrachtungsperspektive;

Fig. 8

eine perspektivische Darstellung einer zweiten bevorzugten Ausführung der Endlagendämpfungseinrichtung;

Fig. 9

wie Figur 8, jedoch in einer Teilansicht mit Befestigung des Zugfederelementes;

Fig. 10

wie Figur 9; jedoch unter Fortlassung der Befestigung;

Fig. 11

wie Figur 10, jedoch in einer Schnittdarstellung und

Fig. 12

die Ausführungsform nach Figur 8 in einer Explosionsdarstellung.

In der Figur 1 wird eine erste bevorzugte Ausführung einer Endlagendämpfungseinrichtung 1 in einer perspektivischen Darstellung wiedergegeben. Innerhalb eines Gehäuses 2, das endseitig durch Verschlüsse 3, 4, verschlossen ist, ist eine Vorrichtung enthalten, die zur Endlagendämpfung eines bewegten Torblattes eingesetzt wird. Beim Auftreffen auf einen auswärts des Gehäuses 2 befindlichen Anschlag 5 wird die in dem bewegten Torblatt vorhandene kinetische Energie aufgenommen und gespeichert. Während die Abschlüsse 3 und 4 den Abschluss des Gehäuses 2 endseitig ausführen, erfolgt gleichzeitig an den Abschlüssen 3, 4 durch seitliche Befestigungen 29 eine Befestigung an nicht dargestellten, im Wesentlichen horizontal verlaufenden Führungsschienen über einen Durchbruch 8. Während in diesem exemplarischen Ausführungsbeispiel das Gehäuse 2 als quadratisches Gehäuse dargestellt worden ist, sind natürlich andere Arten der Formgestaltung, insbesondere rund oder rechteckig, ebenfalls möglich.
In der Figur 2 werden in der rückseitigen Betrachtung der Endlagendämpfungseinrichtung 1 die Befestigungen 29 insgesamt sichtbar, die zur Verbindung mit Führungsschienen dienen. Durch diese Befestigungen 29 ist es beispielsweise möglich, dass die Endlagendämpfungseinrichtung 1 ohne besonderen Platzbedarf auskommt und nicht wie im Stand der Technik eine verlängerte Führungsschiene notwendig macht. Die Endlagendämpfungseinrichtung 1 kann unterhalb oder oberhalb der im Wesentlichen vertikalen Führungsabschnitte platziert werden.
Gemäß der Einzeldarstellung des Gehäuses 2, nach Figur 3, besteht das Gehäuse 2 im Wesentlichen aus einer Basis 9, von der sich abgewinkelt Seitenwände 10 und 11 erstrecken, an deren Enden jeweils ein Steg 12 so abgewinkelt ist, dass ein teilumschlossener Raum innerhalb des Gehäuses 2 entsteht. Durch die gegenüber stehenden Stege 12 wird zwischen diesen ein offener Durchtritt 13 ausgebildet, der die Möglichkeit bietet, den Anschlag 5 beispielsweise über ein Verbindungsstück 6 mit einem Schutzrohr 7 zu verbinden.
In einer vergrößerten Ausschnittdarstellung nach Figur 4 wird eine endseitige Öse 28 eines Zugelementes 19 mit dem Abschluss 4 verdeutlicht. Neben der Befestigung 29 weist der Abschluss 4 eine Abwinkelung 14 auf, die mit Durchbrüchen 18 so versehen ist, dass ein Steg 20 erhalten bleibt. Der Steg 20 ist so ausgebildet, dass dieser für das Zugfederelement 19 die Möglichkeit der Befestigung über die Öse 28 gewährleistet. Die Abwinkelung 14 weist darüber hinaus noch Anschläge 17 zur Verbindung mit dem Gehäuse 2 auf. Beim Blick durch die Durchbrüche 18 wird neben dem Ende des Zugfederelementes 19 auch das Schutzrohr 7 sichtbar, das mit einem Führungsstück 24 verbunden ist. Im Bereich der Anschläge 17 vorhandene, nach innen gebogene Vorsprünge 16, bilden quasi eine Stückverbindung mit dem Gehäuse 2. Bei einer Befestigung der Dämpfungseinrichtung 1 an einer Führungsschiene über die Befestigungen 29 wird ein sicherer Halt des Gehäuses 2 mit der Vorrichtung erzielt.
Der Anschlag 5 ist über Befestigungsschrauben 15 mit dem Verbindungsstück 6 lösbar und damit auswechselbar verbunden. In der Darstellung der Figur 6 ist das Gehäuse 2 nicht dargestellt worden. Während auf der linken Seite des Schutzrohres 7 das Führungsstück 24 dargestellt ist, ist an dem anderen Ende des Schutzrohres 7 ein Führungsstück 23 dargestellt worden. Das Führungsstück 23 und das Führungsstück 24 sind mit dem Schutzrohr 7 fest verbunden. Dadurch, dass in diesem Ausführungsbeispiel eine Zugfeder verwendet wurde, ist das Schutzrohr 7 rund ausgebildet. Sowohl das Führungsstück 24 als auch das Führungsstück 23 können beispielsweise aus einem Kunststoff preiswert hergestellt werden.In order to further increase the universality of the end position damping device, the housing is equipped with its own end pieces. The tension spring element is fastened via one of the end pieces. Here, it is also possible that the attachment does not perform directly on the metallic Abschlusstücken for structure-borne sound insulation, but with the interposition of a rubber element, so as to prevent decoupling of the resulting noise in the operation of Endlagendämpfungseinrichtung. In this embodiment, the housing, including the device for cushioning, be well stocked and thus also with a variety of damping means, and their different strengths, are equipped. This embodiment is attached by the same fastening means on the guide rail. It is understood that this embodiment is also applicable for left and right applications.
The previously described, different embodiments of end position damping devices with a device which is designed as a tension spring element can find use in overhead doors, such as sectional doors and tilting gates, both in manual or automated design.
Further advantages, features and possible applications of the present invention will become apparent from the following description in conjunction with the embodiments illustrated in the drawings.
In the description, the claims, and the drawing, the terms and associated reference numerals used in the list of reference numerals below are used. In the drawing:

Fig. 1

A perspective view of a first preferred embodiment of a cushioning device;

Fig. 2

as FIG. 1 but in a back consideration;

Fig. 3

a housing for a cushioning device;

Fig. 4

a partial section of a mounting possibility of a tension spring element;

Fig. 5

another partial section after FIG. 4 ;

Fig. 6

a perspective view of the existing within the damping device device;

Fig. 7

as FIG. 6 but in a back viewing perspective;

Fig. 8

a perspective view of a second preferred embodiment of the Endlagendämpfungseinrichtung;

Fig. 9

as FIG. 8 but in a partial view with attachment of the tension spring element;

Fig. 10

as FIG. 9 ; but with the attachment omitted;

Fig. 11

as FIG. 10 but in a sectional view and

Fig. 12

the embodiment according to FIG. 8 in an exploded view.

In the FIG. 1 a first preferred embodiment of a cushioning device 1 is reproduced in a perspective view. Within a housing 2, the ends by closures 3, 4, is closed, a device is included, which is used for cushioning a moving door leaf. Upon impact with an outwardly of the housing 2 located stop 5, the kinetic energy present in the moving door leaf is recorded and stored. While the statements 3 and 4 perform the end of the housing 2 end, takes place at the same time at the statements 3, 4 by lateral fasteners 29 attachment to not While in this exemplary embodiment, the housing 2 has been shown as a square housing, of course, other types of shape design, in particular round or rectangular, also possible.
In the FIG. 2 In the rear view of the end-position damping device 1, the attachments 29 are altogether visible, which serve for connection to guide rails. By these fasteners 29, it is for example possible that the Endlagendämpfungseinrichtung 1 does not require any special space and does not make an extended guide rail as in the prior art. The end-of-stroke damping device 1 can be placed below or above the substantially vertical guide sections.
According to the individual representation of the housing 2, after FIG. 3 , the housing 2 consists essentially of a base 9, from which angled side walls 10 and 11 extend, at the ends of each of which a web 12 is angled so that a partially enclosed space within the housing 2 is formed. By the opposing webs 12, an open passage 13 is formed between them, which offers the possibility to connect the stopper 5, for example via a connecting piece 6 with a protective tube 7.
In an enlarged detail view after FIG. 4 an end loop 28 of a tension element 19 is illustrated with the conclusion 4. In addition to the attachment 29, the conclusion 4 a bend 14, which is provided with openings 18 so that a web 20 is maintained. The web 20 is formed so that it ensures the possibility of attachment via the eyelet 28 for the tension spring element 19. The bend 14 also has stops 17 for connection to the housing 2. When looking through the apertures 18 and the protective tube 7 is visible in addition to the end of the tension spring element 19, which is connected to a guide piece 24. In the area of the stops 17, inwardly bent projections 16, as it were, form a piece connection with the housing 2. When the damping device 1 is fastened to a guide rail via the fastenings 29, a secure hold of the housing 2 with the device is achieved.
The stopper 5 is releasably connected via fastening screws 15 with the connecting piece 6 and thus exchangeably connected. In the presentation of the FIG. 6 the housing 2 has not been shown. While on the left side of the protective tube 7, the guide piece 24 is shown, is on the other end of the protective tube 7, a guide piece 23 has been shown. The guide piece 23 and the guide piece 24 are fixedly connected to the protective tube 7. Characterized in that a tension spring was used in this embodiment, the protective tube 7 is formed round. Both the guide piece 24 and the guide piece 23 can be made inexpensively, for example, from a plastic.

With the protective tube 7, the connecting piece 6 is connected by positive and positive connection. The connecting piece 6 has a bend 21, on which the stop 5 is fixed. From the connection piece 6 fixed to the protective tube 7 by a connection 26, the area for fastening the connecting piece 6 via the connection 26 to the protective tube 7 has been enlarged by using a bevel 27.

In the FIG. 7 , in which the device for damping the door leaf has been shown in a rotation, the other end of a possible attachment of the tension spring element 19 can be considered. The tension spring element 19 is there via a spring holder 22 which penetrates the guide piece 23 has been attached. This represents a cost-effective spring holder 22 and allows rapid replacement of the tension spring element 19, for example, at different Torblattgrößen, in production. The storage of Endlagendämpfungseinrichtung 1 is thereby simplified by a multiple.

In the FIG. 5 the device is after FIG. 7 completed by the surrounding housing 2. It is clear that there is a change in the position of the protective tube 7 with the guide pieces 23, 24 from the rest position in the translational direction within the housing 2 by the longitudinal passage 13 in the housing 2 upon impact of a force on the stop 5. By applying the force on the stop 5, the tension spring element 19 is pulled apart and can thereby easily absorb the forces of the door leaf occurring in the final phase of the opening process.

In the FIG. 8 a modified type of Endlagendämpfungseinrichtung 1 is shown in a further preferred embodiment. The housing 2 is identical, with only the tension spring element 19 has not been posted on the fortifications 29. Rather, the housing terminations are performed in a form that brings an even easier and more efficient storage or assembly with it. The housing 2 is fastened via fasteners 43 to the substantially horizontal sections of the guide rails or the like. The Tension spring element 19 is equipped on both sides for structure-borne noise reduction with damping measures.

The end-side design of the housing 2 with a closure piece 36 can the FIG. 10 be removed. In this case, the end piece 36 is formed so that it rests against edges of the housing 2 and at the same time has bends 39 which engage in the housing 2. As a result, a secure fit and secure placement of the end pieces 36 are achieved. Against the outer surface of the end piece 36 presses a rubber element 35 whose outer surface is provided with a disc 34. Against the disc 34, a nut 33 is tightened, which is screwed onto a connecting element 32 which is provided with a thread 40.

Through the sectional view to FIG. 11 This embodiment can still be clarified, wherein the connecting element 32 with a lateral clearance and air with respect to a bore 25, the end piece 36 penetrates. The part of the connecting element 32, which dips within the housing 2, has a bore 41, in which preferably an eyelet 38 is hooked into a differently shaped end of the tension spring element 19. The design of this attachment of the tension spring element 19 is designed so that no contact with parts of the housing 2 can take place, characterized a body sound decoupling is achieved to a large extent. The sectional view after FIG. 11 shows the tension spring element 19 in a loaded or partially loaded position, wherein the individual turns of the tension spring element 19 have been pulled apart. Also, the representation of the FIG. 11 can be seen that a guide piece 42 has left in connection with the protective tube 7, the end position in the region of the end piece 36. By the guide pieces 24, 42, 23 a clean guidance of the protective tube 7 is achieved within the housing 2.

Also the FIG. 10 shows the tension spring element 19 in a partially loaded position, wherein in the longitudinal passage 13 of the housing 2, the connector 6 can come to outside of the housing 2. In the end piece 36 threaded holes 37 are still included, can be introduced via the screw 30. Such a connection shows the FIG. 9 , in which the attachment 43 is made with its angled portion 14 against the end piece 36. The connection between the bend 14 and the end piece 36 is achieved via the screw 30. In order to ensure adjustability here, 14 adjusting holes 31 have been inserted within the bend. So that the structure-borne noise decoupling can also retain its function with attached attachments 43, bores 25 are contained within the bends 14 and are so large that here too the rubber element 35 can pass with play.

The FIG. 12 shows again in an exploded view the components contained within the housing 2 and how they are functionally connected to the fasteners 43. The protective tube 7 is equipped on the left side with the guide piece 42, wherein on the circumference of the protective tube 7, the connecting piece 6 has been fixed non-positively and positively with the cantilevered stop 5. Within the skirt tube 7, the tension spring element 19 is included. On the right side of the end of the protective tube 7, the spring element 19 protrudes with its eyelet 28. On the eyelet 28, the connecting element 32 has been attached. The guide piece 23 with the bore 25 thus allows the connecting element 32 to pass with all-round great play and to penetrate the rubber element 35 and the disk 34 in order to be secured by the nut 33. The fixing takes place against the end piece 36. The end pieces 36 are inserted end into the housing 2 and are attached even with the fasteners 43 on a substantially horizontal extension of a guide rail or the like.

As the preceding description makes clear with the tension spring element 19, contrary to the known embodiments of a stop buffer, a reversal of motion, namely in the form of the tension spring, has been carried out. This can be carried out in an analogous manner by a suitable, elastic polymer body or else with a shock absorber. As a result of the application of force to the stop 5, both the tension spring element 19 or else the polymer element or the shock absorber are lengthened in their extension in the longitudinal extent.

The cushioning 1 can also be regarded as a safety device, for example, if the end position of the control of the door fails, or if the force applied to the door leaf manual forces in the open position are too large.

LIST OF REFERENCE NUMBERS

1

Endlagendämpfungseinrichtung

2

casing

3

graduation

4

graduation

5

attack

6

joint

7

thermowell

8th

breakthrough

9

Base

10

Side wall

11

Side wall

12

web

13

passage

14

angulation

15

mounting screws

16

head Start

17

attack

18

breakthrough

19

tension spring

20

web

21

angulation

22

spring retainer

23

guide piece

24

guide piece

25

drilling

26

connection

27

slope

28

eyelet

29

attachment

30

screw

31

adjusting hole

32

connecting member

33

mother

34

disc

35

rubber element

36

terminating piece

37

threaded hole

38

eyelet

39

angulation

40

thread

41

drilling

42

guide piece

43

attachment

Claims (12)

1. An overhead door with a door leaf and lateral guiding rails, which include an essentially vertical section and an essentially horizontal section with an intermediate connecting arch section, wherein the door leaf is disposed to be mobile in the guiding rails, wherein at the ends of the essentially horizontal sections of the guiding rails at least one terminal position dampening equipment (1) is disposed, characterized in that the terminal position dampening equipment (1) includes a housing (2) with a device, which is configured as a draw spring element (19), the structural shape thereof in the longitudinal extension thereof being increased upon contact with the door leaf, wherein the housing (2) as a hollow profile has a square or round or rectangular cross-section with a long-sided open passage (13) for a changeable abutment (5), which is connected to the device in longitudinal direction of the housing (2), and in that the housing (2) at end sides includes terminal parts (3, 4), which include the attachments (29, 43) for the abutment against at least one of the guiding rails, wherein the draw spring element (19) is attached at one end to parts of the attachment (29, 43) and, at the other end, to a guiding part (23), which is displaceable in the housing (2), and in that the guiding part (23) is connected to another guiding part (24) with the distance of a protecting tube (7), wherein the protecting tube (7) in the resting position essentially envelopes the draw spring element (19), and in that the abutment (5) is attached to the protecting tube (7).
2. The overhead door of claim 1, characterized in that the housing (2) is closed off by terminal parts (36) at end sides, wherein simultaneously the attachment of the draw spring element (19) is executable via the terminal part (36).
3. The overhead door according to claim 2, characterized in that the terminal part (36) includes a bore (25), through which a connecting element (32) with a thread (40) passes contact-less with play all around, which is connected at one end to the draw spring element (19), and, at the other end, bears against the terminal part (36) and is fixed by means of a nut (33).
4. The overhead door according to claim 3, characterized in that between the nut (33) and the terminal part (36), a decoupling of structure borne sound is disposed, preferably in the shape of a rubber element (35).
5. The overhead door according to any of the claims 2, 3 and 4, characterized in that the housing (2) with the terminal parts (36) is provided with an attachment (43), to which at least one of the guiding rails may be attached.
6. The overhead door according to any of the preceding claims, characterized in that the housing (2) or parts of the housing (2) are provided with a coating or equipment reducing structure borne sound.
7. The overhead door according to any of the preceding claims, characterized in that terminal position dampening equipment (1) is directly or indirectly exchangeably connectable to at least one of the essentially horizontally extending sections of the guiding rails.
8. The overhead door according to any of the preceding claims, characterized in that the device of the terminal position dampening equipment (1) is exchangeable and adaptable to the kinetic energy to be absorbed by the moved door leaf.
9. The overhead door according to any of the preceding claims, characterized in that the draw spring element (19) is configured as a duplex spring.
10. The overhead door according to any of the preceding claims, characterized in that the door leaf is a component of a sectional door or an up-and-over-door.
11. The overhead door according to any of the preceding claims, characterized in that in a door leaf automated by means of a drive device, the kinetic energy of the opening procedure contained in the door leaf may be absorbed by and stored in the device, and in that, during a closing procedure of the door leaf, the stored energy of the device may be released against the door leaf.
12. The overhead door according to any of the preceding claims, characterized in that in a manually operated door leaf the terminal position dampening equipment (1) is employable as an abutment buffer in the terminal position of the opening position.

Images