WO1993009324A1

WO1993009324A1 - Door drive, especially for a garage door

Info

Publication number: WO1993009324A1
Application number: PCT/DE1992/000437
Authority: WO
Inventors: Heinz Peter Seip
Original assignee: Heinz Peter Seip
Priority date: 1991-11-08
Filing date: 1992-05-29
Publication date: 1993-05-13
Also published as: DE9203517U1

Abstract

A door drive has a drive unit (11) articulatedly linked to the door (10) and opening and closing it, said unit (11) being held at at least one other supporting point in such a way that a drive wheel moved by the drive unit and driven by the electric motor allocated thereto is arranged to travel along a running surface extending transversely to the door (10) and in the operating state is in operational connection with the running surface in a region at the end of a push-rod which forms the coupling between the door and the running surface. Through the fact that, when necessary, the drive wheel can be taken in the region of the supporting point to a position in which it is disengaged from the running surface, whereby the distance between both the drive wheel and the running surface and between the push-rod and the running surface is at least partly changed, a lighter and more compact drive can be produced, in which the connection between the drive and the door can easily be broken.

Description

Door drive, in particular for a garage door.

DESCRIPTION

TECHNICAL AREA

The invention relates to a door drive, in particular for a garage door, with a drive unit which transfers the door into the open and closed position and is connected to it in an articulated manner and which is held at at least one further support point such that an electric motor is driven by an electric motor which is moved and arranged on the drive unit Drive wheel can be moved along a running surface extending transversely to the door and, in the operating state, is operatively connected to the running surface and is arranged in an area at the end of a push rod which establishes the connection between the door and the running surface. However, such a drive is of course also for doors, windows and the like.

DESCRIPTIO3b .. «JES PRIOR ART

From DE-OS 15 59 727 a drive for a window is known in which a climbing motor pulls upwards on an inclined running surface, at the same time opening the window as part of a push rod. Due to the use of gravity, no further guidance is required and a separation of the drive from the running surface is not provided except in the case of unintentional lifting due to exposure to wind forces. From DE-OS 28 15 997 a door drive is known in which a carriage articulated to the gate can be moved along a rope via a drive wheel. The drive wheel is arranged so that the wheel driven by the motor always requires a separate tread. The arrangement of the drive wheel leads to an overall height of the door drive, which requires a corresponding clearance above the level of the garage door lintel. If necessary, a wheel is also proposed there, which is dragged along to support the ceiling. Springs are also provided for tensioning the rope in order to largely prevent the rope from escaping upwards, since this, like the ^' . - •: ^{• ■} Osrad looping around Seilf ^'EADERSHIP to P? Reducing the life expectancy of such a drive helps.

From DE-GM 86 26 194 a drive is known which is arranged on the inside of the gate. A roller that can be driven by the drive is guided along a running surface by means of a cantilever. In such a device, the cable and the boom require parts which make the device complex and contribute to a reduction in the service life. In particular, when such a drive is to be shipped abroad, the long boom also has a disadvantageous effect, since it leads to bulky packaging.

From DE-OS 31 27 549 and DE-GM 84 09 497 emergency releases are known which allow a separation of the connection between the gate and operator. However, these emergency releases have the disadvantage that the connection between the separate parts can only be restored with great effort and an automatic reset is not possible.

In principle, it is known in door drives of this type, for example from DE-GM 88 06 956.7, to ensure the energy supply of the door drive by providing two mutually insulated sliding tracks, along which the drive unit takes up the energy via coals. In practice, however, has proven to be - 3rd

Disadvantage of such designs pointed out that on the one hand they tend to become soiled and on the other hand are worn out after a relatively short period of time to such an extent that an exchange of the grinding tracks or the coals is necessary.

Furthermore, it is known to ensure the energy supply by flexible cables hanging freely in the rough, which, however, can easily become an obstacle both for the guiding mechanisms of the door itself and for the operator.

PRESENTATION OF THE INVENTION

Based on the prior art mentioned at the outset, the invention is based on the object of developing a door drive of the type mentioned in such a way that a light and compact drive can be produced, the connection between drive and gate being able to be canceled in a simple manner.

This object is achieved with a generic door operator dadurc that the drive wheel can be transferred in the area of the support point from the tread to a position in which e is inactive connection with the tread, the distance between the drive unit and the tread as auc at least partially changed between the push rod and the tread.

Due to the arrangement of the drive wheel at the end of the door opener, a wide variety of types of door drives can be implemented in a simple manner, so that in principle no separate guidance is required. According to the customer's request, the drive can be guided on any running surface.

The door operator is connected to the door via a joint. However, in order to always ensure contact with the tread with this connection, it is supported at another point. case now, in the event of a power failure, it should be necessary to open the gate, but the connection between the drive and the running surface can be broken by unlocking the drive in the area of this further support point.

The design of the door operator ensures that even if the garage ceiling is barely above the height of the lintel, no additional elements such as Push rods are required to move the door operator backwards in the garage, where there is enough space for its height.

If the drive unit itself is designed as a push rod and the drive wheel is arranged at the end of the drive unit facing away from the gate, all components are already present in the drive, so that expensive drive means can be dispensed with. This helps to reduce the manufacturing costs, which are also influenced by the fact that the opener can be assembled from its parts in the shortest possible assembly time. For the installation of the operator at or by the customer, it is sufficient, if the structural requirements are met, to only arrange the opener at the gate.

If the drive unit is connected to the door via an extendable rod that is permanently connected to it, the drives can be attached to any garage door using standard construction methods, and the door drive can also be easily exchanged for a door drive from an older model, since all door drives are articulated are connected to the gate and thus the new gate operator only has to be arranged at the pivot point on the gate. The extensibility ensures an optimal position of the drive to the ceiling in the case of high garage ceilings.

If at least one flexible electrical line is received in the area of a profiled rail designed as a tread, at one end of which the drive unit decreases the energy, this results a long-lasting and reliable control with associated power supply that can no longer lead to disabilities for the operator. Nevertheless, the line is in constant contact with the drive unit, so that there is no longer a need for complex tapping mechanisms.

If the door drive only uses the profile rail for guidance, extremely quiet transport of the garage door is always guaranteed. Therefore, if the door drive is also the push rod of the drive, the profile rail no longer has to function as a support element ^'• •' ^■ ' ^{■ • ■} ?.'. so that a corresponding D ' ^r - "* tion of the profile rail can take place, which also significantly reduces the weight and cost of the drive.

Are lateral receptacles on the profile rail, which are closed by covers except for a connection gap, provided for two electrical lines designed as springs, and the spring in the compressed state is at most as long as the length of the drive unit, which, however, is still one even in the extended state Has minimum winding, there is a simple and reliable energy supply. Since the springs are only slightly warmed during operation due to the prescribed low tension, permanent deformations of the spring cannot occur due to the resistance heating. In addition to this supposed heating deformation, the length of the springs in the compressed state has so far spoken against the use of such springs, since this length must also be present on the rail on one side of the maximum path between the open and closed positions and the available space is therefore quickly exhausted. These problems are eliminated by the springs now used.

Is a tread designed as a tread made up of several assembled sections, which are plugged together via axial fitting holes, which of the Fastening holes are cut at least at the edge, there are favorable conditions for transport. The fitting holes are designed to such a length that they are still touched by the mounting holes so that no disturbing air cushions can arise when inserted.

If the drive wheel is moved to separate it from the tread, it is stored and held in operative connection with the tread by means of a securing element, the spring-loaded securing element being connected to the door handle via a cable and the force of a spring automatically resetting the securing element when the cable force drops causes and the cable pull in the area of the drive unit is preferably deflected in a Bowden cable on the rod and on the part of the joint connected to the gate, with a slide in the plastic injection molded plate provided as a securing element, which has an elongated hole against the force of the spring the plate for guiding the shaft of the drive wheel releases and has inclined surfaces, along which the shaft can be transferred from a position out of operative connection into an operative connection, and holds the shaft out of operative connection in one end position on one leg, the customer can do this in an emergency Open the garage door easily and n., -. On the other hand, if the connection between ^"•• . -. .. <nd tread is to be re-established, the Em.negelungsmechanisn.us automatically ensures that the connection is re-established as soon as the power in the cable has decreased this spring used must only have the appropriate backing effect in coordination with the inclined surfaces.

If the drive wheel is moved to separate it from the tread, it is mounted and held in operative connection with the tread by a securing element, for which purpose the drive wheel has lateral engagement troughs with which a slide designed as a securing element as a result of a movement transverse to the drive shaft by means of engagement elements cooperates that the drive wheel can be uncoupled from the drive shaft as a result of a movement directed along the drive shaft, at the same time a frictional connection between the drive wheel and slide occurs, the drive wheel automatically bringing out of action with the running surface during a subsequent movement of the door as a result of the friction, whereby it in this position as a result of a movement of a bearing bracket penetrated by the drive shaft engages on a latching element, this results in a simple, reliable but effective emergency locking, since simply the friction occurring during the locking for separating the drive wheel and slide is used for unlocking. However, this also has the advantage that when the slide is reset during the closing movement of the gate, the drive wheel automatically comes into operative connection with the running surface and is coupled to the drive shaft. If this reset occurs shortly before the closed position is reached, the door can be locked securely by the drive despite the drive unit failing. This is particularly important because when a door drive is attached, the existing locking elements are usually dismantled, so that locking is no longer possible if the drive fails.

If the Ancricuorad is a chain sprocket that rolls on a chain tensioned as a LauTi idche, whereby the drive unit is supported on the chain via a plate penetrated by the shaft of the drive wheel, the chain is primarily a guide element along which the door drive travels . In this respect, normal tensioning of the chain is sufficient without the need for separate tensioning means such as additional springs. Basically, there is nothing to be said against the chain moving upwards under load, since the chain no longer has the function of a tension element, but mainly has a supporting function. However, if it is undesirable to move upwards, the chain can also be supported by a profile rail, however, the profile rail does not have to be made so stiff that there is no longer any deformation. This has the advantage that a guide for the drive can also be produced by thin rails or by rails assembled from many individual elements.

Further advantages result from the further subclaims.

The invention is explained in more detail below with the aid of exemplary embodiments in the drawings.

BRIEF DESCRIPTION OF THE FIGURES

The garage door operator in a three-dimensional

Representation, the garage door drive in an enlarged, partially cut-out section, a section through the plate of the garage door drive, an enlarged view of the plate according to FIG. 4 with the chain sprocket removed, a door drive guided on a profile rail in a side view in further

Embodiment, a partial section along line II-II of Fig. 5, the actuating plate in a front view in a further embodiment, a rear view of the door operator with the removed

Door operator cover, a front view and a top view of one with

Covered profile rail, a bottom view of the tread and a

Side view of the profile rail,

9a shows an enlarged end view of the profile rail according to FIG. 9a without cover, 11 shows a section according to FIG. 3 through a further one

Emergency lock, Fig. 12a, 12b a top view and a side view of a

Securing element of the emergency lock according to Fig.

11. Fig. 13 the drive wheel in front, side and rear view, Fig. 14 is a side view and top view of an actuating plate.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

As can be seen from Fig. 1, the door drive is on a garage door

10 arranged to open and close the gate. But it is also for windows, doors and the like. suitable. The drive unit 11 is articulated to the gate and is supported at at least one further point, in FIG. 1, on a running surface designed as a chain 14. An electric motor 12 of the drive unit

11 drives a drive wheel which, in the operating state, is arranged so as to be movable when moving along a running surface extending transversely to the gate 10, for example a profiled rail 17. The drive wheel is arranged at the end of a push rod, which creates the connection between the tread and the gate. The drive unit. ". ^'.' While even the push rod is, ^{<■ '■■} a rod 15 can be extended. In this case, either ui rod 15 of a self-extensible, or it can be arranged according to requirements of different length rods to the drive unit, so that the most varied of requirements can be taken into account in the attachment of the drive, without major conversion work being necessary. The drive wheel of the drive unit 11 is preferably arranged in the upper part at the rear end of the drive unit facing away from the gate 10, so that the drive wheel is directly connected the tread can connect. If necessary, the drive wheel is transferred from the tread in the region of the support point to a position in which it is not operatively connected to the tread, the distance between the drive unit 11 and the tread as well as between the push rod and the tread at least partially changing. A carriage connected to the gate via a push rod can also be used, since this also increases or at least changes its distance from the running surface at least in the area of the drive wheel during the emergency release.

A wide variety of surfaces can serve as the running surface for the drive. In the first exemplary embodiment in FIGS. 1, 2, 5, 6, a toothed rack 114 serves as a running surface, on which a toothed wheel 113 meshes as a drive wheel. The rack can be attached to the ceiling 29 using appropriate spacers, but it can also be attached directly to the ceiling. In order to ensure that the drive unit is supported in this embodiment, this embodiment also has a guide element 116 which is almost identical in construction to the plate 16 and which is guided at its upper end in a profile rail in which the toothed rack also lies.

r ^"'OnSurface forming rack is 1 a Pru. However ι ischiene on which meshes the gear. There are also embodiments are conceivable with a rubber wheel or a chain sprocket. Using the profile rail is the electric motor 12 is supplied with the energy needed for its movement. For this purpose, At least one flexible electrical line is provided in the area of the profiled rail 17, which is connected at one end to the drive unit 11. At the other end, it is connected to the energy supply, which either supplies the current for the battery by means of a charger or a transformer has the low voltage required for operation. As can be seen from FIGS. 8 and 9a to 9d, the profiled rail 17 has receptacles 17a for two electrical lines designed as springs 33. The springs 33 have a length of approximately 30 cm in the compressed state, a total of 15 m of cable being wound on this length. This ensures that at least one spring shape is retained both in the open and in the closed position, so that the springs always remain in their receptacles 17a. The drive unit 11 is connected to the springs 33 via a connecting gap 17b. When the drive unit is actuated, the spring is thus stretched and compressed.

In principle, the profile rail, in particular in the case of a plastic construction, can be produced in such a way that an almost closed receptacle for the springs 33 is already present. In the exemplary embodiment, on the other hand, laterally open receptacles 17a are preferred, which are closed with removable lids 34, which simplifies the need to replace the springs 33. Below the receptacles 17a, a guide groove 17c is provided on the profile rail, which serves to guide the drive unit via a guide element 116, such as a plate or a housing. The lower flanks of these guide grooves 17c, which also carry the toothing 17g of the rack, step back inwards, sr '•> ?. , ^' can be seen in particular from FIG. 6, positive guidance has a width which corresponds approximately to the width of the profiled rail. The guide element 116 is penetrated by the shaft 113a of the drive wheel 113.

The profiled rails have fastening bores 17d at regular intervals, which initially have a larger diameter starting from the running surface and below the running surface. This larger diameter serves to receive a fastening dowel and the associated screw, without a malfunction occurring due to fastening means protruding from the running surface during the subsequent actuation of the door drive. The bore then tapers to a smaller diameter in the upper part in the assembly position. The profile rail 17 can be made in one piece or can be assembled from several sections 17e, which leads to the avoidance of bulky packaging. The sections 17e shown in shortened form in FIGS. 9a to 9d have fitting bores 17f into which the shaft 17h of a preceding section is immersed. The fitting bores 17f and the fastening bores 17d are placed in such a way that the fastening bore just touches the end of the fitting bore 17f at the edge. If, however, the shaft 17h of section 17e is inserted into the fitting bore 17f of the next section 17e during assembly, there are no obstructive air cushions which can counteract assembly, since air can escape through the fastening bore 17d.

Regardless of whether a one-piece rail 17 or a plurality of sections 17e together form the tread, the control device 36 is in any case mounted in such a way that it is received by a part of the rail. The control device has a height that corresponds approximately to the height of the profile rail 17, so that it can be easily attached to low garage ceilings. The use of the current-carrying springs 33 is also independent of the design of the profile rail. These springs pose no difficulties if instead of the profile rail 1 ^' . ^{■ "~.} Ze of several sections together ..rwendet Wiru, since due to the round cross-sectional shape of the no difficulties reder the transitions between the individual sections 17e.

Since the spring 33 can be kept relatively short in the compressed state, it is possible to accommodate the spring between the tapping point of the drive unit 11 and the garage door lintel in the compressed state, so that its length is less than the length of the drive unit. Since the profile rail does not necessarily have to perform a supporting function, it is also possible to make the present profile rail correspondingly soft and elastic. Of course it is also possible to use another door operator to be used in connection with the profile rail, which is guided, for example, at a further point on the profile rail and is movably connected to the push rod and the gate.

The control device connected to the profile rail receives its signals from limit switches 24 which are located on the drive unit. During operation, the drive unit 11 runs on clamping pieces 25 which are clamped onto the profile rail 17 at the beginning and end of the opening path. During this run-up, an actuating plate 35, 35 'provided on the shaft 113a of the drive wheel 113 is actuated. This actuating plate 35, 35 'is arranged between the guide element 116 and the drive unit. Due to its basic mounting on the shaft 113a, the actuating plate rotates about the drive axis when it runs up. The actuating plate 35 has an upper trigger section 35a, which is angled toward the profiled rail 17 and runs onto the clamping pieces 25, and a lower actuating section 35b. This lower actuating section has an actuating pin 35c, which is located in a round slot guide lld of the base plate 11a of the drive unit and actuates the limit switches in the drive unit 11 during the rotary movement.

When moving the dt ... lorantriebs it goes without saying that depending on the dimensions and distances between the profile rail and the lintel, the door drive will assume a different position. Because of this, the actuating pin 35c has to travel a different path, depending on the circumstances, until it reaches the two limit switches 24 (FIG. 8).

However, the actuating plate can also be designed in another exemplary embodiment according to FIG. 7. The actuating plate 35 'is designed as a rectilinear plate which also carries an actuating pin on the lower actuating section 35b'. The main difference is, however in that the trigger section bears a toothing 35a ¹ 'into which an actuating member 25a of the clamping piece engages when it runs open. The teeth of the toothing, which are preferably arranged at a distance of a few millimeters, are rounded off so that the actuating element only engages a tooth when a complete engagement is actually possible. However, this makes it possible that, regardless of the position of the drive unit 11 relative to the running surface, an optimal point of application is always reached, so that the actuation paths are reduced. In this case, however, the elongated hole no longer has to be round and the actuating plate 35 'is always in a specific position with respect to the drive unit 11. The plate can be returned to its zero position in that the actuating pin 35c' and thus within the drive unit 11 engages a spring, not shown in the drawing.

As can be seen from Figure 1, the clamping pieces 25 are clamped in the guide grooves 17c. When assembling, the two clamping pieces are in the immediate connection to the actuating plate. For the basic setting, the door is then moved into both end positions, the displaceably mounted clamping pieces shifting into their respective end positions. This Ve - ^ - r * ^■ _' • .— • = .- is carried out by the guide-r. - .- .. .- ^■■ This guide ^element , however, no longer moves with the clamping pieces 25 during the later movements , which are so firmly fixed that the rotary movement of the actuating plate 35 can take place when it comes up.

In an embodiment according to the second embodiment of FIGS. 3, 4, the drive unit is guided via a chain sprocket 13 on a chain as a running surface. This chain is tensioned at two points and can be provided with clamping pieces 25, which simultaneously serve as limit switches 24 or are limit switches themselves. These plastic parts are used for this purpose the chain pushed and clamped to it. However, the use of induction switches is also possible.

However, the bare ceiling 29 can also serve as the running surface, so that basically no space above the fall plane is required. Here, the door operator can have a single-acting gas pressure spring or a pressure spring that ensures contact between the running surface and the ceiling. The gas pressure spring can be set so that the contact between the drive wheel and the ceiling is removed. In order to achieve appropriate traction between the drive wheel and the tread, the drive wheel is designed as a rubber-coated roller in this case. The friction required for traction can also be produced by arranging a Velcro strip in the area of the tread or by roughening the surface with an adhesive spray. If the ceiling is inclined too much, it is also advisable to hang from the ceiling with a rail, which, however, does not have a guiding function but only a support function for the drive. In this case, the profile rail can be made correspondingly thin-walled or composed of several small pieces, which in particular reduces transportation difficulties. The compactness of the door drive that can be realized in this way makes this drive a larger market, however. Dealers are also keen to sell drives that do not have bulky external dimensions, which also applies to the other exemplary embodiments, which do not apply at all are dependent on rails.

In order to implement an emergency release of the drive in the event of a power failure, which results in a separation of the drive wheel and the tread, a spring-loaded securing element can be provided which basically maintains the operative connection between the drive wheel and the tread. The securing element is connected to the door handle 10a via a cable 19, so that the unlocking can be accomplished from the handle. By strength A spring 20 automatically resets the safety device and the operative connection between the drive wheel and the tread is restored as soon as the unlocking force in the cable decreases. In order to avoid kinks at the transition between the door drive and the door, a Bowden cable 22 is arranged in this area, which is fastened to the door drive on a leg 15a of the web 15 and the second fastening point of which is part 21a of the joint 21.

The plate 16, 116 is preferably a plastic injection molded part in which the drive wheel is slidably mounted. The wall thickness of the spraying can be influenced as required and depending on which components have to be cast in. 1 to 4, a slide is provided, which, however, can equally well be designed as a swivel plate, and which is held displaceably in the plate 16. During the emergency release, the slider 23 moved against the force of the spring 20 releases an elongated hole 16a (FIG. 4) of the plate 16. The drive wheel can move downward in this slot so that the operative connection between the drive wheel and the running surface is eliminated. Of course, the slide and the elongated hole can also be arranged directly on the drive unit, for example on the base plate 11a, and there c ^{5 "} . ^" ...- T- .. ^' - »tion of the operative connection. -

The slide is provided with an inclined surface 23a (FIG. 4) on which the shaft 13a, 113a moves downwards when it is deactivated. Furthermore, at the lower end of the inclined surface 23a, the slide 23 has a leg 23b, which at the same time serves as the rest position for the drive wheel or its shaft which has been deactivated. The inclined surface 23a is designed so that the force of the spring 20 is sufficient to return the shaft 13a, 113a with the associated drive wheel in the connecting position and to overcome the forces that occur as well as the frictional forces that may occur on the rope. In the cases in which the support is carried out on an element fastened to the ceiling, as for example in the first and second exemplary embodiments, the plate 16 produced as a plastic injection molding has plastic parts 16b which allow the drive to be positively guided. These are threaded into the corresponding guides when the drive is installed. As in FIG. 4, the plate 16 can also be equipped directly with the limit switches 24, which in this case are arranged directly in the vicinity of the drive wheel. In order to achieve the most accurate possible position of the limit switches, the entire plate is constructed symmetrically to a vertical axis through the shaft or through the elongated hole 16a, and is almost constantly held in a horizontal position as a result of the guidance in the upper region 16c of the plate 16 .

11 to 12, a further emergency lock is shown. Here too, the drive wheel designed as a gear 113 is slidably mounted for separation from the running surface of the profiled rail 17. However, there is initially a lateral displacement which disengages the drive wheel from the drive shaft 113a. For this purpose, the drive wheel has lateral engagement troughs in the form of concentric circles with triangular Que ^■ - ^• - as a securing element 38 has a slider is used αer formed as engagement elements cone. 39 If the slide 38 is now actuated via the handle 10a and the cable 19, the cones come to rest against the walls of the engagement recesses 113b, so that the drive wheel moves along the drive shaft transversely to the drive shaft 113a when the slide 38 continues to move. During this movement, a decoupling from the drive shaft takes place, at the same time a frictional engagement between the drive wheel and the slide occurs. If the gate 10 is moved in this position by the drive wheel and slide, the drive wheel automatically becomes out of operative connection with the running surface as a result of the friction, since the drive wheel rises up. The securing element is also a Bearing bracket is, which engages after a pivoting movement on the housing of the drive wheel with a locking recess 38a, so that the gate can be moved easily.

In order to lock the door despite a fault in the door drive, which is only possible via the door drive due to the dismantling of corresponding locking elements, the slide 38 is brought back into operative position with the tread during the closing movement by resetting the handle and thus releasing the train, since the slide now comes out of engagement again and thus at the same time the connection between the drive wheel and the drive shaft is restored. Basically, these movements are based solely on the frictional forces. However, they can be further assisted by springs 40. All of this movement is supported by an actuating plate 42 which receives the drive wheel in troughs 42a.

As can be seen in particular from FIG. 8, the drive unit 11 has a base plate 11a which carries all the important parts of the drive unit and which represents the actual push rod of the drive unit. The base plate is equipped with bores 11b and / or at least one round slot guide in order to attach the rod 15 to this ^" ... *. Base plate prepared differently can thus be attached according to needs. This is then necessary, if the drive unit has to be arranged at a more or less inclined position in order to secure a drive that is reliable in the long run, because the aim is to have a sufficient incline of the drive so that no undesired bulging or rearing up of the drive unit occurs The base plate is also equipped with the electric motor 12, which drives the chain sprocket 13, for example, via a transmission 27, which can occur when using a rope or a chain as a guide element Electric motor is driven via a control device 26. This control device has, inter alia, two relays 26a which, after the gate has been closed, ensure that the garage is illuminated by the lighting 28 for a period of, for example, one minute. Furthermore, the drive unit has an accumulator 32 which, even in the event of a power failure, is at least able to ensure the operational safety of the drive for a further 48 hours. Power is always supplied via the normal power network, ie a plug is assigned to the drive, which can be inserted into any normal socket. However, the operating current is reduced to a low voltage of 12 or 24 volts. The supply can take place via a power line such as the spring 33 or, as is known in the prior art, can be designed as a trailing or conductor line. The power supply can also be ensured by a solar collector, which is arranged on the outward surface of the gate 10. The arrangement of a solar collector is advisable due to the proximity of the drive to the gate. However, this proximity to the gate also has the advantage that an antenna for a radio remote control 30 can be arranged on the outer wall of the gate, so that disruptive influences by ironing iron in the ceiling area of the garage can be prevented.

Claims

Patent claims

1. Door drive, in particular for a garage door, with a drive unit (11) which transfers the door (10) in the open and closed position and is connected to it in an articulated manner and which is held at at least one further support point in such a way that one moved by the drive unit and an electric motor (12) arranged thereon is driven along a running surface which extends transversely to the door (10) and, in the operating state, is operatively connected to the running surface and is arranged in a region at the end of a push rod which establishes the connection between the door and the running surface, characterized that, if necessary, the drive wheel can be transferred into a position in the region of the support point in which it is out of operative connection with the tread, the distance between the drive wheel and the tread as well as between the push rod and the tread at least partially changing.

2. Door drive according to claim 1, characterized in that the 'drive unit (11) itself is designed as a push rod and that the drive wheel on the gate (10) facing away from the end of the drive' ..- - 11) is arranged.

3. Gate drive according to claim 1, characterized in that the drive unit (11) is connected to the gate (10) via an extendable rod (15) which is fixedly connected to it.

4. Door drive according to claim 1, characterized in that in the region of a tread formed as a tread rail (17) at least one flexible electrical line (33) is received, at one end the drive unit (11) decreases the energy.

5. Door drive according to claim 4, characterized in that on the profile rail (17) side receptacles (17a), which are closed by covers (34) except for a connecting gap (17b), are provided for two electrical lines designed as springs (33) are.

6. Gate drive according to claim 5, characterized in that the spring (33) in the compressed state is at most as long as the length of the drive unit (11).

7. Door drive according to claim 1, characterized in that a tread formed as a tread (17) is constructed from a plurality of joined sections (17e) which are plugged together via axial fitting bores (17f) which are cut off by the fastening bores (17d) at least at the edge are.

8. Door drive according to claim 1, characterized in that the designed as a tread and as a rack (17) has guide grooves (17c), in which the drive unit (11) via a through the shaft (113 a) of the drive wheel (113) penetrated guide element (116) is forced.

9. Door drive according to Ansprucn 1, characterized in that the drive wheel is slidably mounted for separation from the tread and is held in operative connection with the tread by a securing element.

10. Door drive according to claim 9, characterized in that the spring-loaded securing element via a cable (19) with the door handle (10 a) is connected and the force of a spring (20) automatically causes the resetting of the securing element when the cable force decreases.

11. Door drive according to claim 10, characterized in that the cable (19) in the region of the drive unit (11) on the rod (15) and on the part connected to the gate (21a) of the joint (21) in a Bowden cable (22) is deflected, a slide (23) guided in the plate (16) designed as a plastic injection molded part being provided as a securing element, said slide (23) against the force of the spring (20) being an elongated hole (16a) in the plate (16) for guiding the shaft (13a) of the drive wheel (13) and has inclined surfaces (23a) along which the shaft (13a, 113a) can be transferred from a position out of operative connection into active connection, and holds the shaft out of operative connection in one end position on one leg (23b).

12. Gate drive according to claim 9, characterized in that the drive wheel has lateral engagement troughs (113b) with which a slide designed as a securing element (38) due to a transverse to the drive shaft (113a) movement by means of engagement elements cooperates so that the drive wheel as a result a movement directed along the drive shaft can be decoupled from the drive shaft, at the same time a frictional engagement between the drive wheel and the slide occurs.

13. Gate drive ^■ "^"'^"•" ^• - ^S pruch 12, characterized, r- the Antr.eusrad with a subsequent movement of the gate UO) due to the friction brings automatically out of action with the tread, it in this position as a result a movement of a bearing bracket penetrated by the drive shaft (113a) engages on a latching element.

14. Door drive according to claim 13, characterized in that the securing element is the bearing bracket, which engages after a pivoting movement on the housing (41) of the drive wheel with a latching recess (38a) and is provided with two cones (39) designed as engagement elements, which with their walls rest against the engagement troughs (113b) with a conical cross section.

15. Gate drive according to claim 12, characterized in that when the slide (38) is reset during the closing movement of the gate (10), the drive wheel automatically comes into operative connection with the running surface and is coupled to the drive shaft.

16. Gate drive according to claim 1, characterized in that the movement of the gate (10) limiting limit switches (24) are provided which are arranged in the region of the drive wheel on a symmetrical circuit board, the plate (16, 116) preferably being designed as a circuit board and plastic parts which can be pushed and fastened thereon are provided as switching elements over the chain (14) or the profile rail.

17. Gate drive according to claim 1, characterized in that on a shaft (113 a) of the drive wheel (113) an actuating pia '. : e (35) for the movement of the gate (10) limiting limit switch (24) is provided, which is preferably arranged between the guide element (116) and drive unit (11), the actuating plate (35, 35 ') having an upper release section (35a , 35a ¹ ) and a lower actuating section (35b, 35b '), which gel with a in a slot guide (lld) of the drive unit (11). ^• . • - ^{■ ••} - .tigungsstift (35c, 35c ') actuated the limit switches (24) in the drive unit (11).

18. Door drive according to claim 17, characterized in that the release section (35a ¹ ) has a toothing in which an actuating member (25a) of a clamping piece (25) which is displaceable on a tread formed as a tread engages.

19. Gate drive according to claim 17, characterized in that the actuating plate (35 ') is held by a spring engaging the actuating pin (35c ¹ ) in a zero position in which it assumes a certain position relative to the drive unit (11).

20. Gate drive according to claim 1 or 2, characterized in that the drive wheel is a chain sprocket (13) which rolls on a chain (14) tensioned as a tread, the drive unit (11) on the chain via a shaft ( 13a) of the drive wheel through which the plate (16) is supported.