Auxiliary drive with damping device for a movable door leaf

Abstract

Auxiliary drive with damping device for a movable door leaf which is guided in lateral guide rails which have at least one essentially horizontal guide rail section, wherein the auxiliary drive is determined by a spring accumulator (7) in the form of a tension spring element which is arranged between a stationary holder and a holder fastened to a driver (8), characterized in that the auxiliary drive essentially consists of an elongate, stationary support element (1) with a holder (2) fastened to one of its ends and an assembly (27) with a holder (3) which can be changed in translation and locked on the support element (1), wherein the holder (2) and the holder (3) are fixed laterally in a substantially horizontally running guide rail section of the guide rails.

Description

The invention relates to an auxiliary drive having a damping device for a movably adjustable door leaf, which is guided in lateral guide rails which have at least one substantially horizontal guide rail section, the specification "substantially" including all embodiments of guide rails which are designed in a technically necessary oblique arrangement, the auxiliary drive having a tension spring element which is tensioned in its open position when the door leaf impacts.A door leaf which can be changed in position in lateral guide rails which have a substantially vertical section and a substantially horizontal section with an arc section connecting between them can be seen from DE 10 2015 100 617 A1. At the free ends of the substantially horizontal guide rail sections an end position damping device is mounted. This end position damping device contains a device in which the kinetic energy of the opening door leaf in the region of its parking position is captured and consumed or at least partially consumed in such a way that the structural shape of the device is enlarged.EP 3 550 100 A1 discloses an end position storage device in which a tension spring is used as a force storage device. This energy store is free of guide devices and is connected by a connection, on the one hand, via a fixed connection to a rail section and, on the other hand, via a connection, directly or indirectly to a holder which can be changed in position. This holder is changed in translation within the guide rail section by a driver.DE 10 2017 129 103 A1 discloses a fastening device which contains a plug connection and is inserted into prefabricated receptacles of a guide section. The fastening device is arranged on a guide element and has a compression spring which is compressed when the door leaf hits it. Such a type of fastening with plug connections cannot be carried out in practice because it is only possible to mount this fastening device in fixed sections and therefore local adaptation is not possible.An end position damping device for a spatially variable door leaf of a door having an energy store for absorbing the kinetic energy of the door leaf in motion in the end opening position is disclosed in DE 20 2018 101 882 U1. The energy store is movably arranged on a carrier element which is held spaced apart between two stationary holders. A pressure application to the energy store, in the form of a compression spring, by the gate leaf is possible via the locally variable driver.DE 10 2018 129 581 describes an auxiliary drive for a motor-driven door leaf, which consists of a stationary, round spacer element, on each of which holders are arranged at the end. On the round spacer piece, a tension spring element is arranged so as to be spatially variable by applying force, which is fixed at one end to the spacer piece and is connected at the other end to a driver which is spatially variable on the spacer element.The manufacturing processes available today produce gates with increasingly larger and heavier gate leaves. As a rule, these door leaves are driven by a motor drive, although manual actuation is also possible. Such door leaves can consist as sectional doors of segments joined together in a pivotable manner, which are moved in lateral guide rails. These guide rails can also have, in addition to a substantially vertical section, a substantially horizontal rail section connected by an arc. In this substantially horizontal guide rail section, the parking position of the door leaf is in its opening position. This open position means that the door leaf is in a substantially horizontal position with its almost entire weight. This position corresponds to a dead point with respect to the kinematic change in position of the door leaf, wherein the start of a closing travel is considered as the change in position.The object of the invention is to provide a device for door leaves of the aforementioned type which can be changed in position and which is capable of giving the door leaf an auxiliary pushing means from its park position for the subsequent closing travel. The different assembly situations resulting from the different assembly designs should be executable with such a device. Mounting of such a device with millimeter precision should be possible. Furthermore, the noise generation of such a device should be low.The object of the invention is achieved by an auxiliary drive with simultaneous damping device according to claims 1 and 12. The dependent claims which follow the main claim represent a further embodiment of the object according to the invention.In order to use the kinetic energy located within the door leaf as far as possible without losses when the door leaf is moved into its parking position, this energy is stored in a spring store of an auxiliary drive. Thus, the kinetic energy is first converted into a static energy by the storage. If necessary, i.e. during a closing process of the door leaf, this stored energy can be converted again in the form of kinetic energy by the auxiliary drive with simultaneous damping device. As a result, a pushing force is provided for overcoming the dead point of the door leaf. In this case, the auxiliary drive can be very accurately adjusted and mounted within the substantially horizontal guide rail section. In addition, due to the local conditions, the mounting of the auxiliary drive with the damping device is often hindered.Whereas the final position storage device according to EP 3 550 100 A1 can be used essentially only for door leaves with a low weight, the use of the auxiliary drive with damping device according to the present invention should be usable for all types of door leaves without limits. This means that even with large door leaf weights, use is possible.A construction is therefore proposed which includes an elongate support member which preferably has a round cross-section. Such a support element can be manufactured inexpensively as a solid material or a tube and comprises at one of its ends a holder which is firmly connected to the support element. A further second holder, which is designed in conjunction with a spring store and a driver as a complete assembly, can be translationally modified on the support element and, after accurate placement, can be indirectly fixed, i.e. the attachment of the second holder is not carried out on the support element. This translatory change of the assembly enables a very precise positioning and thus adjustment of such a device in all designs of door leaf. Both the fixed holder with the support element and the movable holder on the support element are laterally fixed in a substantially horizontally extending guide rail section of the guide rails. This fixing depends on the mounting type of door leaf or also on the spatial conditions. This assembly makes it possible to meet all assembly requirements. The holder which can be changed on the support element is designed in such a way that it substantially surrounds the support element. At the same time, a spring accumulator is connected to one end of this holder, the other end of the spring accumulator being connected to a movable driver. On the driver there is also a stop for the door leaf or components which are connected to the door leaf, wherein the stop dips into a guide rail section without contact.Such an assembly can contain both a spring accumulator in the form of a compression spring and a tension spring. In practice, however, tension spring elements have proven to be secure spring accumulators.Such a construction of the auxiliary drive can be mounted at any point of a guide rail section without further processing. It is possible here that in a preferred embodiment two substantially horizontally running guide rail sections are arranged next to one another on each side of the door leaf. These guide rail sections run parallel and are preferably connected to one another. This type of mounting makes it possible for the complete auxiliary drive with damping device to be fastened in or on these guide rail sections. Furthermore, there is the possibility that such an auxiliary drive can be mounted both above and below the guide rail section.The auxiliary drive has a stop which is connected to the driver and can be changed translationally on the supporting element by means of a slider connected to the driver. The driver has been designed such that the slider projects into the substantially horizontal guide rail section, wherein the guide rail as such is designed as a J- or C-profile. The stop which engages in the guide rail section without contact thus requires no further space requirements outside the guide rail. By means of such a construction, the auxiliary drive can be connected to the guide rail sections in such a way that, during an opening operation of the door leaf, the driver with the lateral stop is acted upon by force either directly by the door leaf or by add-on parts such as rolling elements or the like.Tension springs have proven particularly effective in practice as spring accumulators because they can be loaded with greater forces and do not tend to become blocked, as is the case with compression springs. Also, due to the use of tension spring elements, reduced noise is produced, because the inner diameter of the spring accumulator has been selected to be larger than the diameter of the support element.The mode of operation of the auxiliary drive, which only works purely mechanically, is activated when the door leaf is moved from the closed position into the open position and thus into its park position. In this case, the kinetic energy present in the moving door leaf is used to apply force to the stop. The kinetic energy of the moving door leaf is transferred into the spring accumulator. This takes place until the door leaf has arrived in its parking position. The door leaf is subsequently blocked in the rest position, i.e. in the open position, for safety reasons either by the electric drive or a locking in this position. This means that a static energy is now stored in the spring element, which is subsequently released again during a closing process. By means of the auxiliary drive with the spring accumulator, the dead center position of the door leaf can be overcome. This pushing force of the auxiliary drive is sufficient to bring the door leaf out of the dead center position.Such an auxiliary drive with a damping device operates maintenance-free. In addition to the small space requirement, a better assembly and at the same time also a noise reduction are associated with the spatially variable assembly, compared with known designs, on account of the construction.As a rule, such an auxiliary drive is mounted on each side of the door leaf in the substantially horizontal guide rail sections. Furthermore, the compact assembly also makes it easily possible to replace the spring store. By using tension spring elements of different thicknesses, optimum adaptation of the auxiliary drive configuration is possible for all different door leaves.The auxiliary drive with the damping device can also be used only as a pure stop element for an opening door leaf, which is moved by hand, for example. Here too, the modular construction of the construction is numerous, since due to the assembly which is translationally displaceable on the support element, precise placement is possible.The invention is explained in more detail with reference to the exemplary embodiment schematically represented in the drawings. FIG. 1 is an overall view of a construction of an auxiliary drive with a stationary holder and a subassembly which can be changed in translation on a supporting element; FIG. 2 shows an individual representation of the assembly according to FIG. 1 in a perspective representation; FIG. 3 is a view similar to FIG. 2 looking from a different direction; FIG. 4 shows a detail illustration of the spring store in conjunction with a holder; FIG. 5 shows the embodiment of a driver in a perspective illustration; FIG. 6 shows a spring accumulator in an embodiment as a tension spring element; FIG. 7 shows a preferred embodiment of a holder which can be changed in position on the supporting element;FIG. 1 shows an overall illustration of a possible embodiment of an auxiliary drive with damping device. In this case, a holder 2 is fixedly connected to the support element 1 on a support element 1 at one end via fastening bores 4. Furthermore, an assembly 27 is arranged on the support element 1. The support element 1 can be made, for example, of round material or a tube or also in another shape, for example polygonal. The assembly 27 essentially consists of a holder 3 on the right-hand side, to which a spring accumulator 7 is interchangeably fastened via a connecting bore 5. The other end of the spring accumulator 7 is fastened to a driver 8, wherein a stop 9 is interchangeably attached to the driver 8.The assembly 27 is shown in separate representations in FIGS. 2 and 3. A slider 12 is inserted inside the driver 8, the end-side fastening of the spring accumulator 7 coming to rest with its two end windings on the slider 12. This results in particular in a sound decoupling between the spring accumulator 7 with its inner spring diameter 28 relative to the support element 1, because the diameter of the support element 1 is smaller than the inner spring diameter 28.In order that the holder 3 can also be translationally changed on the support element 1 and thus be moved in its absolute position, it is necessary for an overlap 13 to be present on the holder 3, as FIG. 7 illustrates. The overhang 13 is designed such that the outer diameter of the supporting element 1 can enter the inner region of the overhang 13 with little play.The connecting bores 5 make it possible, depending on the type of fastening on the left and right sides of the guide rail section, to connect the latter selectively via a hook 14 of the spring store 7. Furthermore, both the holder 2 and the holder 3 are equipped with a mounting wall 25 in which apertures 24 or bores are contained in order to be able to pass counter plates 11 via fastenings 10 to the guide rail sections, not shown, in an embodiment as a C or J profile. In order that the mounting of the holders 2 and 3 takes place without problems, these have an upper stop 6, which comes to rest on the guide rail sections. Furthermore, laterally protruding reinforcements 26 are provided on the mounting wall 25 for shape stabilization.In a single illustration according to FIG. 5, the driver 8 has been illustrated. The driver 8 consists of a base 15, on each end of which angled portions 16, 17 are formed. Apertures 18 are provided within the angle portions 16, 17, respectively, which serve to receive the slider 12. The slider 12 has projections on its circumference, not designated in any more detail, which engage, for example, in lateral bulges 19 of the aperture 18. Thus, the slider 12 is placed in the apertures 18 in a rotationally secure manner. The base 15 has a leg 20 from which a bend 21 extends to project downwards. At the end, a receptacle 22 for the replaceable stop 9 is provided on the angled portion 21. The stop 9 can be interchangeably connected to the driver 8 via apertures 23.FIG. 6 shows a spring accumulator 7 which is designed as a tension spring. On the right side of the spring accumulator 7, the inner diameter is smaller; this is substantially determined dimensionally by the outer diameter of the support element 1 and by the spring connection inner diameter 29. The inner spring diameter 28 adjoining the right side is substantially larger than the outer diameter of the support element 1. The inner spring diameter 28 abuts on the plastic slider 21 through the spring coils. Since tension springs do not tend to warp due to the load, contact with the support element 1 will not occur due to the larger inner spring diameter 28. As a result, no noise is generated when the auxiliary drive is acted upon by the door leaf. In order to facilitate the screwing-in of the end-side windings of the spring store 7, mounting aids 30 are formed on the driver 8 at the bent portions 16, 17.Reference numerals denote reference numerals1 Support element 2 Holder 3 Holder 4 Fastening bore 5 Connection bore 6 Stop 7 Spring store 8 Driver 9 Stop 10 Fastening 11 Counter plate 12 Slider 13 Overlap 14 Hook 15 Base 16 Bend 17 Bend 18 Aperture 19 Bulge 20 Limb 21 Bend 22 Receptacle 23 Aperture 24 Aperture 25 Mounting wall 26 Reinforcement 27 Assembly 28 Spring inner diameter 29 Spring connection inner diameter 30 Mounting aid

Claims

Auxiliary drive with damping device for a movably adjustable door leaf, which is guided in lateral guide rails which have at least one substantially horizontal guide rail section, wherein the auxiliary drive is determined by a spring store (7) in the form of a tension spring element which is arranged between a fixed holder and a holder fastened to a driver (8), characterized in that the auxiliary drive substantially comprises an elongate, stationary support element (1) having a holder (2) fastened to one of its ends and an assembly (27) with a holder (3) which can be changed and fixed in position translationally on the support element (1), wherein the holder (2) and the holder (3) are fixed laterally in a substantially horizontally extending guide rail section of the guide rails.Auxiliary drive according to claim 1, characterised in that the spring store (7) is fastened on one end to the holder (3) and is connected on the other end to a driver (8) which can be changed in translation in a spatially variable manner on the supporting element (1) between the holders (2, 3), wherein a stop (9) is arranged on the driver (8), which stop dips into an interior space of the horizontal guide rail section in a spatially variable manner.Auxiliary drive according to claim 1, characterised in that the support element (1) is round or polygonal in its cross-section.Auxiliary drive according to one of the preceding claims, characterized in that the holder (3) has an overlap (13) which corresponds to the circumference of the supporting element (1), wherein a dimensional adjustment which is subject to play exists between the overlap (13) and the circumference of the supporting element (1).Auxiliary drive according to claims 1 and 2, characterised in that the driver (8) has a base (15) which extends parallel to the support element (1), on the ends of which bent portions (16, 17) are formed, which are each provided with apertures (18) and are penetrated by a slider (12) which can be changed in position directly on the support element (1).Auxiliary drive according to one of the preceding claims, characterized in that the apertures (18) contain bulges (19) laterally, in which projections present on the circumference of the slider (12) engage for preventing the slider (12) from rotating.Auxiliary drive according to one of the preceding claims, characterized in that the driver (8) has mounting aids (30) on the bent portions (16, 17) for receiving the spring element of the spring store (7), so that one end of the spring element engages behind one of the bent portions (16, 17) by engaging over at least two end-side windings.Auxiliary drive according to one of the preceding claims, characterized in that the connection between the holders (2, 3) and the horizontal guide rail sections is achieved by means of counter plates (11), which are fixed by means of fasteners (10) against mounting walls (25) by force fit and form fit.Auxiliary drive according to one of the preceding claims, characterized in that the inner diameter of the spring store (7) corresponds to the outer diameter of the slider (12).Auxiliary drive according to one of the preceding claims, characterized in that the slider (12) is made of a plastic.Auxiliary drive according to one of the preceding claims, characterized in that the stop (9) is interchangeably connected to the driver (8).Door having a door with a guide rail section which runs in a substantially horizontal manner, and a door leaf which can be changed in position, having at least one auxiliary drive with a damping device according to one or more of the preceding claims, the stop (9) penetrating into an interior space of the guide rail section which runs in a substantially horizontal manner without contact with the guide rail section in a variable-position manner.Door according to claim 12, characterised in that the guide rail sections run parallel to one another and are connected to one another.Gate according to one of claims 12 or 13, characterised in that the holder (2) has a counter plate (11) and the holder (3) has at least two counter plates (11), which each engage in an interior of the substantially horizontally running guide rail section and can be adjusted and fixed against mounting walls (25) of the holders (2, 3).

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