EP4204656A1

EP4204656A1 - Safety system for a drive, which has a circulating traction mechanism, of a gate, in particular a lifting gate, more particularly a high-speed lifting gate, and gate comprising said safety system

Info

Publication number: EP4204656A1
Application number: EP21770170.5A
Authority: EP
Inventors: Primo URBAS
Original assignee: Efaflex Inzeniring doo
Current assignee: Efaflex Inzeniring doo
Priority date: 2020-08-31
Filing date: 2021-08-27
Publication date: 2023-07-05
Also published as: WO2022043514A1; JP2023543967A; DE102020122719A1; CN115843322A

Abstract

The invention relates to a safety system (1) for a drive (50), which has a circulating traction mechanism (13), of a gate, in particular a lifting gate (100), more particularly a high-speed lifting gate (100), comprising a drive gear (11) and an output gear (10). A drive torque can be transmitted from the drive gear (11) to the output gear (10) by the traction mechanism (13), and the safety system (1) comprises a blocking element (15) that is not in engagement with the output gear (10) in a normal operating position, in which the traction mechanism (13) is intact, and is kept pretensioned in the normal position by means of a pretensioning device (28) and a holding device (20), wherein the holding device (20) is designed to release the blocking element (15) at least in the event of a break/tear of the traction mechanism (13), and the pretensioning device (28) moves the blocking element (15) out of the normal position and into a blocking position, in which at least the output gear (10) is blocked.

Description

description

Safety system for a drive of a gate, in particular a lifting gate, more particularly a high-speed lifting gate, and gate having the safety system, having a revolving traction mechanism

The invention relates to a safety system for a door drive having a revolving traction mechanism, in particular a lifting door, more particularly a high-speed lifting door according to the preamble of claim 1 and a door having the safety system.

A generic safety system is known from CN 2 373 548 Y and DE 16 59 481 A.

DE 102017 102614 A1 discloses a device for detecting a door leaf falling and a system for detecting a door leaf falling. The relevant device uses a door leaf falling detection device which is provided on the door leaf and has means for detecting an acceleration of a door leaf falling detection device. A communication unit sends a crash notification signal if a crash is positively detected, for example when a detected acceleration value exceeds an upper limit. In the event of a fall being detected, suitable braking means can then be actuated by means of such a fall detection device, which ensures that the door leaf is stopped.

DE 20 2012 001 954 U1 discloses a drive arrangement for roller doors which has a catch device, the drive arrangement comprising an endlessly revolving transmission means. Furthermore, this drive device includes a drive motor, which directly drives a so-called safety gear. This safety gear contains a safety gear. From the output shaft this Safety gear, which acts as a drive shaft for the transmission drive, transmission means lead to corresponding driven wheels on a winding shaft.

It is proposed to use sensors known per se to monitor the wear of the transmission means and, in the event of, for example, excessive sagging, to prevent the movement of the door by means of a door control.

Furthermore, centrifugally actuated safety gears are known in which a rotating element is coupled to a door drive shaft, for example. Locking bodies are driven in rotation together with this rotary element, which are displaced outwards due to centrifugal force when a certain speed is exceeded and, for example, enter locking pockets, whereby further rotation of the rotor shaft is prevented by means of the locking bodies.

JP 2008-38 499 A discloses a traction means tensioning device which is easy to assemble.

The object of the invention is to specify a safety system for a drive of a door, in particular a lifting door, which has a peripheral traction mechanism, which can detect a breakage/tearing of the peripheral traction mechanism in a particularly simple and reliable manner and, if this is detected, reliably and particularly easily for a blockage of a driven wheel, in particular a gate curtain of a lift gate.

Furthermore, the safety system should be able to react quickly in order to keep an uncontrolled further lowering of the gate curtain of the gate, in particular the lifting gate, to a minimum in the event of a breakage/tearing of the circulating traction mechanism and to ensure an “immediate or almost immediate” blocking of the gate curtain. Furthermore, the safety system according to the invention should be independent of an external energy supply and should itself work reliably, in particular automatically and reliably.

Furthermore, the object of the invention is to specify a door, in particular a lifting door, which is equipped with the safety system.

The above tasks are solved with a security system having the features of claim 1 . Advantageous embodiments are specified in the dependent claims.

Furthermore, the above task with regard to the gate is achieved with a gate, in particular a lifting gate, with the features of claim 12 . Advantageous embodiments are specified in the dependent claims.

A safety system according to the invention is a safety system for a drive of a door, in particular a lifting door, more particularly a high-speed lifting door, having a revolving traction means, with a drive wheel and a driven wheel, wherein a drive torque can be transmitted from the drive wheel to the driven wheel by means of the traction means, the safety system also includes a blocking member which, in a normal operating position in which the traction means is intact, is disengaged from the driven wheel and is held in the normal position in a pretensioned manner by means of a prestressing device and a holding device, the holding device being designed and set up in such a way that it is at least in the event of a tearing of the traction mechanism, the blocking member is released and the prestressing device shifts the blocking member from the normal position into a blocking position in which at least the driven wheel is blocked.

Such a safety system is developed in such a way that the holding device is provided on a motor bracket of a drive motor, which is held in a prestressed operating position by the traction mechanism. The present safety system according to the invention for gates, in particular lifting gates, can be used particularly expediently for an indirectly driven synchronous shaft/winding shaft of such a gate, in particular lifting gates, with such a drive being particularly space-saving, but having a peripheral traction mechanism which has a certain probability of failure (breakage/tearing ) is inherent.

The present invention is particularly suitable for monitoring such a traction means, which is designed in particular as a toothed belt, chain or V-belt.

It is expediently usable as an alternative or in addition to other braking and safety devices on a gate, in particular a lifting gate. What is particularly advantageous about the safety system according to the invention is that in the event of a failure of the traction mechanism, the driven wheel is automatically, immediately and automatically blocked in at least one of the two possible directions of rotation, in order to prevent a fall, e.g. B. a gate curtain or a gate curtain of the gate, especially lifting gate to avoid. A fast reaction time of the safety system is particularly advantageous, so that an unintentional acceleration of a gate curtain or gate curtain does not occur or occurs only to a significant extent during a time until the driven wheel is blocked. As a result, the blocking forces or braking forces remain low. Furthermore, it is of particular advantage that the safety system according to the invention is independent of external electrical, hydraulic or pneumatic energy sources and thus a particularly high level of operational safety is ensured.

According to a further development, a motor bracket for the drive motor of the drive is provided as the attachment location for the holding device, which bracket can usually be displaced or pivoted within limits relative to the frame, for example to enable retensioning of the traction means. In the event of a pulling device tearing, the displacement path or the pivoting range of the motor bracket can be expediently designed in such a way that the motor bracket moves a piece, for example due to gravity is shifted or pivoted, so that the holding device releases the holding section of the blocking member and the safety system is triggered due to the tearing of the traction means and the resulting displacement of an engine bracket.

In a preferred embodiment of the invention, the blocking member has a blocking element which interacts with the driven wheel in a form-fit blocking manner in the blocking position.

A form-fitting engagement of the blocking element with the output gear enables a particularly secure blocking that is independent of, for example, environmental conditions, which in contrast to this, for example in the case of a frictional blocking, could influence a coefficient of friction between the blocking partners acting there and thus a purely frictional blocking would be less reliable.

Furthermore, it can be advantageous that the blocking element is a toothed segment with a toothed wheel radius that increases counter to a direction of engagement, which meshes with a corresponding toothed section of the driven wheel in the event of blocking.

Such a design of the blocking element as a toothed segment with a gear wheel radius that increases in a direction of engagement causes a self-reinforcing blocking. The prestressing device or the prestressing of the blocking element only has to be designed and constructed by such a measure that the prestressing results in an engagement of the toothed segment and a corresponding toothed section of the output gear. Once this intervention has taken place, the blocking or the further reinforced toothing acts automatically, in that a torque is transmitted from the output gear to the toothed segment. Due to the increasing toothed segment radius, an increased radial force exertion is guaranteed with increasing engagement, so that higher radial forces act between the output gear and the blocking element with increasing engagement, which Toothed segment and the toothed portion of the output gear engage, so that any existing frame elasticity of a frame in which the drive and the safety system is installed, can not lead to an unwanted disengagement can occur.

Furthermore, it can be advantageous that the prestressing device is a lever arm pivoted in the vertical direction relative to the lowest possible zero position, so that its prestressing takes place in the form of potential energy, and/or is a spring.

The above measure represents a particularly simple way of prestressing the blocking member. In the simplest case, the prestressing of the blocking member is realized in that the lever arm is pivoted about a pivot axis from its lowest possible position, which causes the center of gravity of the lever arm or a boom weight of a different design has a higher potential energy compared to its lowest point and, due to the force of gravity, tends towards the lowest possible potential energy level in the event of release. The corresponding preload is therefore solely due to the gravitational force and does not require any additional components. In support of or as an alternative to this, the prestressing device can be supplemented by a spring or formed alone.

Such a spring can, for example, be designed as a tension spring or as a torsion spring which, starting from the prestressed normal position, supports or alone causes a movement of the blocking element towards the blocking position or at least until the blocking element engages with the output gear. Such can also be done with a suitably selected and set up, e.g. B. built-in compression spring.

Furthermore, it can be advantageous that the holding device is a pedestal, which releases a holding section of the prestressing device in the event of tearing. The above measure represents a simple way of maintaining a pretension of the blocking element. In the simplest case, the holding device is a pedestal, which occupies different positions in space depending on the presence or absence of the traction means, with the position of the pedestal being such that there is a holding section of the pretensioning device, i.e. for example the lever arm, in a pretensioned position holds position.

In a further preferred embodiment, after a tear in the traction mechanism, the motor bracket can be automatically displaced by means of a pretension, in particular can be pivoted with respect to a drive frame and the motor bracket thereby releases the holding section.

Pivoting displaceability of the motor bracket has proven to be particularly expedient, since, in contrast to linear displaceability, there is less friction or smaller surfaces between a motor bracket and a connecting component move relative to one another and thus reliable pivoting of the motor bracket due to gravity can be guaranteed more reliably than in the case of linear displacement.

Furthermore, it can be advantageous for the motor bracket to be pretensioned by means of a spring device in relation to the drive frame in order to pretension it.

The above-mentioned displaceability of the motor bracket for the purpose of releasing the holding section of the blocking member can be supported by a spring device or can be ensured solely by a spring device. The latter in particular when, for example, in an installation position of the drive, a pivotability that is determined in terms of direction by gravity, z. B. is not possible for reasons of space. Furthermore, it can be expedient to position the motor bracket in relation to a lowest zero position of the motor bracket in order to prestress the motor bracket in such a way that it has an increased potential energy.

This represents the simplest possible form of preload for the motor bracket. This gravity-related preload can be achieved by the swiveling motor bracket together with the drive motor having a center of mass during normal operation of the safety system, which is higher than a mechanically possible lowest position, whereby the preload is due to gravity he follows.

Furthermore, it can be advantageous that the blocking member preferably interacts with the output wheel in a blocking manner only in one direction of rotation of the latter.

This makes it possible, for example, to be able to open the door curtain against the blocking direction when the safety system is triggered, e.g. B. to be able to open manually. Despite the fact that it can be opened manually, the gate curtain cannot fall, which contributes to increasing the safety of the lifting gate.

Furthermore, it can be advantageous that the blocking member is at least partially arranged in its blocking position in a normal path of the intact traction means.

This ensures that when a torn traction mechanism is replaced by a new, intact traction mechanism, the new, intact traction mechanism can only be attached if the blocking element and thus the entire safety system are reset and re-tensioned and thus activated, since only then can the normal route of the traction means is released and this does not collide with the blocking member.

Furthermore, it can be expedient that the driven wheel is coupled to a winding shaft or a synchronous shaft of the door, in particular the lifting door, and that Security system is set up and designed in such a way that falling of a gate curtain or gate curtain is thereby blocked.

In this application, the safety system is particularly suitable for use in lifting gates with a retractable gate curtain or in spiral lifting gates in which the gate curtain is guided in a spiral with its lateral edges. In addition, the invention can be used with low-lintel doors and vertical and sideways runners.

The invention also includes a door, in particular a lifting door, having the safety system as described above.

In a particular embodiment, the gate, in particular the lifting gate, is characterized in that the gate, in particular the lifting gate, is designed as a high-speed lifting gate with a gate curtain or a gate curtain, with the intended operation of the gate, in particular the lifting gate, an opening speed of the gate curtain or the door curtain of more than 1.0 m/s in some areas, preferably 1.5 m/s, particularly preferably 2.0 m/s, up to a maximum of 5.0 m/s, and a closing speed of at least more than 0.3 m/s in some areas s to 1.5 m/s, in particular greater than 0.5 m/s to 0.8 m/s.

The safety system according to the invention has proven particularly effective as a supplement to other catch systems which engage directly with the gate curtain or gate curtain for gates, particularly in the design as high-speed gates. This is due in particular to the short reaction time from a tearing of the traction mechanism to an effective blockage of the drive shaft. In this way, an impulse of the gate curtain/gate curtain that is difficult to absorb with increasing falling speed can be prevented and the synchronous shaft/winding shaft can be blocked at an early stage.

In a special embodiment, the door is designed as a spiral lifting door without a winding shaft, which has a synchronous shaft. In the following, the invention is explained in more detail by way of example with reference to the figures, namely an application of a lifting gate in the design of a spiral lifting gate.

Show it:

FIG. 1: a perspective partial view of a lifting gate according to the invention with a drive having the safety system according to the invention in a perspective representation;

FIG. 2: the safety system according to the invention in a side view in a normal position with the traction mechanism intact;

FIG. 3a: in a partially transparent perspective illustration, the interaction of a blocking element, in particular its holding section, with a holding device in a position held in pretension (normal operating position of the drive);

FIG. 3b: the holding device and the holding section in an enlarged detailed view;

FIG. 4a: the above-described embodiment of the safety system according to the invention in the normal position with the traction mechanism intact;

FIG. 4b: the safety system according to the invention in a blocking position with torn traction means;

FIG. 5: a modification of the safety system, in which the traction mechanism forms the holding device.

The features described are of course also in other types of gates, in particular in low lintel gates and vertical and sideward sliding gates usable. The invention is also suitable for the above-mentioned goals as slow-moving and fast-moving doors.

In addition to being used in spiral doors, the invention can also be used to advantage in so-called roller doors, in which the door curtain is wound around a winding shaft. In this respect, the term lifting gate used in the exemplary embodiment is to be understood generally as a gate in the different embodiments described above.

A safety system 1 according to the invention in an application on a lifting gate 100 is shown in FIG. The synchronous shaft 101, which in the case of a lifting gate 100 in the design of a lifting gate with a curtain that can be rolled up, can also be a winding shaft, is designed and set up in the present design of the lifting gate 100 as a spiral lifting gate for the purpose of attaching a gate curtain 103, which, for example, consists of slats or of otherwise in rigid segments can be designed to move up and down.

The gate curtain 103 is formed from a large number of slats/segments 104, which are each connected to one another in an articulated manner at their longitudinal edges.

The door curtain 103 is guided laterally in guide rails (not shown), which are fastened to frames 105, for example. At an upper end of the frames 105 in the vertical direction V, the synchronous shaft 101 running in the horizontal direction is mounted and coupled to a driven gear 10 in a torque-transmittable manner.

The driven wheel 10 is part of a drive 50 for the door curtain 103. In addition to the driven wheel 10, the drive 50 has a drive wheel 11 which is coupled to a drive motor 12. The drive wheel 11, which is driven by the drive motor 12, is connected to the driven wheel 10 by means of an endlessly revolving traction mechanism 13. The endlessly circulating traction means 13 can be, for example, a chain, a V-belt or a toothed belt, with the drive wheel 11 and Output wheel 10 are sprockets, V-belt wheels or toothed belt wheels. The drive 50 also includes a blocking element 15 as an essential component of the safety system 1. The blocking element 15 has a blocking element 16 (not shown in FIG. The lever arm 17 is rigidly connected to the blocking element 16 and is mounted pivotably with respect to the frame 105 about a first pivot axis S1. The drive motor 12 is connected to a motor bracket 18, wherein the motor bracket 18 is arranged at least partially pivotable about a second pivot axis S2 with respect to the frame 105. For this purpose, the motor bracket 18 is fastened via a bearing block 19 to the frame 105 or a part that is comparable to the frame 105 and is immovable. The pivot axes S1 and S2 are in particular aligned parallel to a longitudinal axis of the drive motor 12 and to a longitudinal axis of the winding shaft/synchronous shaft 101 .

FIG. 1 shows a state of the security system 1 according to the invention in a so-called normal position, i. H. with a traction mechanism 13 which is intact, d. H. not cracked/broken. Compared to this normal position, the safety system 1 according to the invention is able, in the event of the traction means 13 tearing/breaking, to shift into a blocked position in which the winding shaft/synchronous shaft 101 is blocked. Such a blocking position is explained in more detail below in connection with the description of FIG. 4b.

A pedestal 20a, which is covered in FIG. 1, is arranged on the engine bracket 18 as a holding device 20. For an explanation of the holding device 20 in the embodiment as a pedestal 20a, reference is made below to FIGS. 3a, 3b. The pedestal 20a (cf. Figures 3a, b) provides a surface 21 available on which in the normal position according to Figure 1, Figure 2, Figures 3a, b and Figure 4a a holding portion 22, which in the embodiment according to the figures, for example as Ball bearing 22a is formed, can rest. In the normal position, i.e. when the drive 50 is ready for operation, the ball bearing 22a rests on the surface 21 and holds the lever arm 17 or its center of gravity in a raised and pivoted position relative to its lowest possible vertical position, so that the lever arm 17 has a higher potential energy due to gravity than in an undeflected, vertically lowest position. This potential energy of the lever arm 17 is maintained by the pedestal 20a, on which the ball bearing 22a rests, during normal operation of the drive 50 and the safety system 1 (also in its normal position). Thus, the safety system 1, in particular its lever arm 17 and thus the entire blocking member 15 is prestressed, namely arranged prestressed due to potential energy.

In this prestressed arrangement, the blocking element 16 is not in engagement with the driven wheel 10, so that the driven wheel 10 can rotate freely in both possible directions of rotation and the door drive can therefore move the door curtain/door curtain 103 up and down in the intended manner.

The blocking element 16 (see FIG. 2) is designed as a toothed segment 30 . The toothed segment 30 has teeth 31 along its circumference, which can mesh with at least one toothed section 32 of the output gear 10 . If the driven wheel 10 is designed as a chain wheel or as a toothed belt wheel, the teeth that are present in any case can be used as the toothed section 32 . If the driven wheel 10 is designed as a V-belt or V-ribbed belt wheel, for example, it is expedient to provide a corresponding toothed section 32 adjacent to the raceways of the V-belts/V-ribbed belts, which is able to mesh with the toothed segment 30 .

In a region which is closest to the output wheel 10 in the normal position, the toothed segment 30 has a smaller radius of the toothing there with respect to the pivot axis S1. The distance between the toothing and the first pivot axis S1 increases eccentrically in the opposite direction to the direction of engagement E, so that a tooth of the toothing that is further away from the direction of engagement E has a greater radial distance (radius) from the pivot axis S1 than the first tooth in the direction of engagement E. The increase in the radius occurs eccentrically from the first to the last tooth of the toothed segment 30 continuously. The toothed segment 30 of the blocking element 16 is z. B. attached to the frame 105 pivotable about the first pivot axis S1.

Furthermore, a stop 34 is provided against which—as will be described below—the lever arm 17 rests when the safety system 1 is in a blocked position.

In the above-described embodiment of the safety system 1 according to the invention, the lever arm 17 with its holding section 22, which is designed, for example, in the form of the ball bearing 22a, together with the pedestal 20a as the holding device 20, represents a prestressing device 28, by means of which the lever arm 17 can be potential energy biased state is kept biased in the normal position of the security system 1. As will be described below, in the event of a trigger for initiating the blocking position, the pretensioning of the pretensioning device 28 is released and thus, due to the potential energy stored in the lever arm 17, an automatic actuation/pivoting displacement of the blocking element 16 about the pivot axis S1 can take place.

Another possible embodiment of the pretensioning device 28, not shown in the figures, could be spring devices, for example torsion springs, which resiliently pretension the blocking element 16 about the first pivot axis S1 by means of spring energy, in support of or as an alternative to the pretensioning by means of potential energy. In such a case, a spring device would support part of the pretensioning device 28 or would be the pretensioning device 28 on its own.

The functioning of the safety system 1 according to the invention is explained below with reference to FIGS. 4a (normal position) and 4b, which shows the blocked position.

In the illustration according to Figures 4a, 4b, the same structure of the security system 1 is shown as in the above-described Figures 1, 2. In contrast to FIG. 1 and corresponding to FIG. 2, a cover covering the blocking member 16 and the stop 34 in FIG. 1 is omitted.

FIG. 1 shows the normal position of the safety system 1 according to the invention, in which the traction mechanism 13 is intact and, as intended, connects the drive wheel 11 to the driven wheel 10 in a torque-transmittable manner. The traction mechanism 13 is designed, for example, as a toothed belt. In this position, the lever arm 17 is in its prestressed position, with the holding section 22 (ball bearing 22a) covered in FIG. 4a resting on the holding device 20, in particular the pedestal 20a. The motor bracket 18 is in a position suitable for this purpose, with the traction mechanism 13 being properly tightened, for example by means of a clamping screw 35. B. against the frame 105 biasing. The blocking element 16 is arranged in this position in such a way that none of the teeth of the toothed segment 30 is in engagement with corresponding teeth of the output gear 10 . In this state, proper up and down operation of the door curtain/door curtain 103 (not shown in FIG. 4a) of the lifting door 100 is ensured.

Starting from FIG. 4a, the case will now be explained when the traction means 13 breaks or tears. As soon as the traction means 13 breaks or tears, the motor bracket 18 can move away in the direction of the arrow 200 by gravity, pivoting about the second pivot axis S2. In normal operation, the traction means 13 thus keeps the motor bracket 18 pretensioned against the clamping screw 35 . If, in the event that the traction mechanism 13 tears, the motor bracket 18 moves away together with the drive motor 12 in the direction of arrow 200 due to gravity, the holding device 20, i.e. the platform 20a, is also moved and performs a movement along the direction of arrow 201 with the second pivot axis S2 as a pivot. As a result, the surface 21 of the pedestal 20a is also displaced below the ball bearing 22a, ie below the holding section 22, so that after a certain distance the ball bearing 22a is no longer supported by the surface 21. At this point in time, a pivoting movement of the lever arm 17 begins together with the blocking element 16 along the direction of the arrow 202 with the first pivot axis S1 as the pivot. As a result, after a certain pivoting, which occurs due to gravity, ie automatically, teeth of the Blocking element 16 with teeth of the driven gear 10 engaged. At the same time, the downward striving gate curtain/gate curtain 103 applies a torque to the driven wheel 10 in the direction of arrow 203, which moves the blocking element 15 (blocking element 16 and lever arm 17) further along the direction of arrow 202, even beyond the point at which a center of gravity of the blocking member 15 has reached its lowest vertical point. The corresponding radial contact pressure between the blocking element 16 and the output gear 10 is increased as a result of the toothing radius increasing as the pivoting progresses in the direction of the arrow 202 .

Driven by the driven wheel 10, the lever arm 17 moves into its mechanically possible end position (blocking position) according to FIG. In such a position, it is no longer possible for the output wheel 10 to rotate further in the direction of the arrow 203, ie it is blocked, and further lowering of the door curtain/door curtain 103 is prevented.

Furthermore, in this position, the lever arm 17 is arranged in such a way that it comes to rest in an imaginary normal travel path 205 of an intact traction mechanism 13 or, in the illustration according to FIG. 4b, crosses it. In other words, the lever jib 17 is located in the plane of the traction means 13, viewed in a direction perpendicular to the plane of the page in FIGS. 4a, 4b.

With the blocking position reached in Figure 4b, however, it is still possible to lift the gate curtain/gate curtain 103 by hand, for example, with the result that the driven wheel 10 is driven in a direction opposite to the direction of arrow 203 and the blocking element 15 thus tends to move out of the blocking position according to Figure 4b against the direction of arrow 202 back towards the normal position. If the blocking member 15 then releases the driven wheel 10 from a specific relative position, the driven wheel 10 can be rotated further counter to the direction of the arrow 203, for example, which ensures on the lifting gate 100 that the gate curtain/gate curtain 103 is raised. The safety system 1 according to the invention therefore only blocks in one of the two possible directions of rotation shown in the exemplary embodiment as arrow direction 203. If a new, intact traction device 13 is used as part of maintenance work in the event of a torn traction device 13, it is imperative that the lever arm 17 be moved out of its blocking position according to Figure 4b, since otherwise it would be impossible to put on the new traction device 13 because the lever arm 17 crosses the normal route 205.

This ensures that the blocking element 15 is removed from the normal path 205 by the appropriate maintenance personnel in order to fit the new traction means 13 and in this connection the interaction of the holding section 22 with the holding device 20 is again established and the safety system 1 is thus once again in the position capable of being triggered normal position.

As a result, the safety system 1 according to the invention creates a mechanically particularly simple, reliable and, despite everything, non-destructive safety system 1, which can be returned to its original state without further replacement of components (with the exception of the torn traction means 13). If it is triggered by a torn traction mechanism 13, it is not absolutely necessary to replace other parts.

Furthermore, the safety system according to the invention can be operated without external energy supplies. In particular, no electrical, hydraulic or pneumatic energy supplies are necessary.

In a modification of the safety system 1 shown in FIG. 5, a roller 51 can be located, for example, at the free end of the lever arm 17, which uses the traction means 13 itself, in particular—as shown—the inside or the outside thereof, as a holding device 20. In the event that the traction means 13 tears, the no longer tensioned inside of the traction means 13 then releases the above-mentioned roller 51 and the blocking member 15 can be moved from its normal position analogous to the embodiment described above via the engaged position, i.e. the position in which the first teeth of the Blocking member 16 mesh with the driven gear 10 in its Reach blocking position and thus blocking the driven wheel 10 and the winding shaft or the synchronous shaft 101 act.

Reference List

I security system

10 driven wheel

II drive wheel

12 drive motor

13 traction means

15 blocking link

16 blocking element

17 lever arm

18 engine console

19 bearing block

20 holding device

20a pedestal

21 surface

22 holding section

22a ball bearing

28 biasing device

30 tooth segment

31 teeth

32 gear section

33 bearing console

34 stop

35 tension screw

50 drive

51 roll

100 lifting gate

101 synchronous shaft/winding shaft

102 gate cutout

103 gate curtain/gate curtain

104 slats/segments

105 frames

200, 201, 202, 203 direction of arrow

205 normal route

E engagement direction

V vertical direction

51 first pivot axis

52 second pivot axis

Claims

Claims Safety system (1) for a drive (50) having a revolving traction mechanism (13) for a gate, in particular a lifting gate (100), more particularly a high-speed lifting gate (100), with a drive wheel (11) and a driven wheel (10), wherein a drive torque can be transmitted from the drive wheel (11) to the driven wheel (10) by means of the traction means (13), the safety system (1) comprising a blocking element (15) which is in a normal operating position in which the traction means (13) is intact , is disengaged from the output wheel (10) and is held in the normal position in a pretensioned manner by means of a prestressing device (28) and a holding device (20), the holding device (20) being designed and set up in such a way that it can be held at least in the event of a breakage /tearing of the traction means (13) releases the blocking member (15) and the prestressing device (28) shifts the blocking member (15) from the normal position into a blocking position in which at least the Driven wheel (10) is blocked, characterized in that the holding device (20) is provided on a motor bracket (18) of a drive motor (12) which is held in a prestressed operating position by the traction means (13). Safety system according to Claim 1, characterized in that the blocking element (15) has a blocking element (16) which interacts with the driven wheel (10) in a form-fit blocking manner in the blocking position. Safety system according to Claim 1 or 2, characterized in that the blocking element (16) is a toothed segment (30) with a toothed wheel radius that increases counter to an engagement direction (E) and which meshes with a corresponding toothed section (32) of the driven wheel (10) in the event of blocking. Security system according to one of the preceding claims, characterized in that the biasing device (28) has a opposite lowest possible zero position in the vertical direction (V) is pivoted deflected lever arm (17), so that its prestressing takes place in the form of potential energy, and/or is a spring.

5. Safety system according to one of the preceding claims, characterized in that the holding device (20) is a pedestal (20a) which, in the event of tearing, releases a holding section (22) of the prestressing device (28).

6. Safety system according to one of the preceding claims, characterized in that after a tear in the traction mechanism (13), the motor bracket (18) can be automatically displaced by means of the pretension, in particular pivotally displaceable with respect to a drive frame, in particular a frame (105), and the Holding section (22) releases.

7. Safety system according to one of the preceding claims, characterized in that for prestressing the motor bracket (18) it is prestressed by means of a spring device with respect to the drive frame.

8. Safety system according to one of the preceding claims, characterized in that for biasing the motor bracket (18) the motor bracket (18) compared to a lowest zero position of the motor bracket (18) has an increased potential energy.

9. Safety system according to one of the preceding claims, characterized in that the blocking member (15) preferably only in one direction of rotation of the output wheel (10) interacts with this blocking.

10. Security system according to one of the preceding claims, characterized in that the blocking member (15) in its blocking position at least is partially arranged in a normal running path (105) of the intact traction means (13).

11. Safety system according to one of the preceding claims, characterized in that the driven wheel (10) is coupled to a winding shaft or a synchronous shaft (101) of the gate, in particular the lifting gate (100) and the safety system (1) is set up and designed in such a way that falling of the gate curtain or gate curtain (103) is blocked.

12. Gate, in particular lifting gate having the safety system (1) according to one or more of claims 1 to 11.

13. Door according to Claim 12, characterized in that the door is designed as a lifting door (100), in particular as a high-speed lifting door (100) with a door curtain or a door curtain (103), with an opening speed of the door curtain or of the door curtain during normal operation of the door door curtain of more than 1.0 m/s in some areas, preferably 1.5 m/s, particularly preferably 2.0 m/s, up to a maximum of 5.0 m/s, and a closing speed of at least more than 0.3 m/s in some areas s to 1.5 m/s, in particular greater than 0.5 m/s to 0.8 m/s.

14. Door according to claim 12 or 13, characterized in that the door, in particular the lifting door (100) is designed as a spiral lifting door without a winding shaft, which has a synchronous shaft (101).