EP2459827B1 - Door drive device having traction means monitoring and door provided therewith - Google Patents

Description

The invention relates to a door drive device with a traction device monitoring device and a gate provided therewith.

From the EP 0 083 947 A1 are known a method and an apparatus for monitoring a driven gate or the like, wherein in a motor drive unit of a door drive in a learning drive, a load-dependent parameter, such as the motor current or the motor power over the path or the time is recorded and then in the operation of the automatic driven gates of the parameters is monitored and when a weg- or time-dependent load threshold is exceeded a shutdown of the motor drive unit. Thus, a load monitoring device is provided according to EP 0 083 947 A1 a safe monitoring of the drive-up of the door leaf on obstacles allows.

From the DE 101 13 847 A1 and the WO 96/05395 A1 Door leaves are known with Zugseileinrichtungen, wherein a blocking device monitors a flaccid becoming the traction means and secures the door leaf when flaccid becoming the traction device against a process in the opening direction. These known solutions are used for burglary protection and prevent prying of the door leaf from the outside.

From the DE 34 27 105 C2 a fishing device for a vertically movable door leaf is known, which is held by means of a train loaded wire rope on a motor-driven drive device and / or weight compensation device. This gear is a blocking device, which is flaccid becoming the connected wire the raised door leaf against a method in Closing direction blocked. In order to avoid injury from falling due to a rope break door leaf. Further, a power switch for the drive unit may be provided on the gear, so as to set the drive unit dead in case of cable break.

Many overhead doors, such as in the DE 44 28 034 C1 are described, are provided with tension mechanisms, in particular cable drives, are transmitted via the opening forces on the door leaf. The door leaf thus hangs in the raised state on the ropes. About the cable drive on the one hand biasing forces of a counterbalancing device, but increasingly also transmitted driving forces of a door drive. As a rule, cable drives are provided on each of the vertical sides of the door. If a rope breaks, the door drive continues to drive the door leaf over the other rope, which is then loaded not only by the door leaf but also by the driving forces. Although as explained above fishing gear to prevent a crash in cable break are known to trigger a safety catch in case of breakage of the rope, so as to set the door leaf, the danger is great that with further drive and the cable pull on the other side breaks. For this reason, it is an in DE 10 2009 039 623 A1 described established standard technology for each wave drive currently on the market that in addition to slack rope fuses that secure the door leaf against falling, slack rope switch must be provided to put the door drive in case of cable break out of order to meet relevant safety standards and a permit for to get the door drive.

The installation and wiring of the slack rope switch and the slack rope switch itself increase the cost and cost of such known door drive devices.

The invention has for its object to provide a simple mountable on-site Torantriebsvorrichtung, which is more reliable than previous Torantriebsvorrichtungen despite simpler and cheaper construction.

This object is achieved by a door drive device with the features of the attached claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

A provided with such a door drive gate is the subject of the independent claim.

The invention provides a door drive device for driving a door leaf in an opening direction and in a closing direction via a pulling mechanism which has at least a first traction means and at least one second traction means, which traction means are loaded during operation of the door drive device to train, wherein a Zugmittelüberwachungseinrichtung is provided is designed both for monitoring a rupture or power failure of the first traction device as well as for monitoring a breakage or voltage failure of the second traction device, wherein the Zugmittelüberwachungseinrichtung comprises: a first mechanical locking device with a first blocking element which in a blocking position, the movement of the door leaf in the closing direction blocked or difficult, a movement of the door leaf in the opening direction but allows and releases the movement of the door leaf in the closing and opening direction in a release position, and with ei ner first Spannungsfühl- and holding means for sensing a traction means of the first tension means and for holding the first blocking element in response to this Zugmittelspannung is provided, wherein the first Spannungsfühl- and holding means holds the first blocking element in the release position and at a reduction of a tensile stress of the first traction means initiating or enabling a movement of the first blocking element into its blocking position by a first biasing force,
a second mechanical blocking device which, with a second blocking element which blocks or impedes the movement of the door leaf in the opening direction in a blocking position, permits a movement of the door leaf in the closing direction and in a release position permits the movement of the door leaf Door leaf in the closing and opening direction releases, and is provided with a second Spannungsfühl- and holding means for sensing a traction means of the second tension means and for holding the second blocking element in response to this Zugmittelspannung, wherein the second Spannungsfühl- and holding means the second blocking element in the release position holds and initiates a movement of the second blocking element by a second biasing force in its blocking position and allows a reduction in a tensile stress of the second traction device,
and a load monitoring device for monitoring a motor drive unit, which is to be connected for driving the door leaf to the pulling mechanism, on exceeding a load threshold.

In an advantageous embodiment of the invention it is provided that the pulling mechanism is a cable pull mechanism which transmits the rotational movement of a shaft which is rotatably driven by the motor drive unit to the door leaf and at least a first rope as the first traction means and at least one second rope as the second traction means having.

In an advantageous embodiment of the invention it is provided that in each case at least a first cable is provided on a first of two opposite sides of the door leaf, wherein the first blocking means and / or the first voltage sensing and holding means is arranged only on this first of the two opposite sides to only monitor the tension of the at least one first rope on this first side.

In an advantageous embodiment of the invention it is provided that in each case at least a second cable is provided on a second of two opposite sides of the door leaf, wherein the second blocking device and / or the second voltage sensing and holding device is arranged only on this second of the two opposite sides to only monitor the tension of the at least one second rope on this first side.

In an advantageous embodiment of the invention it is provided that on the first of the two sides, the first blocking device is provided for monitoring the tension of the at least one first cable on this first side and
on the remaining second side of the two sides, the second blocking device is provided for monitoring the tension of the at least one second cable on this second side.

Preferably, the Zugmittelüberwachungseinrichtung has neither a slack rope switch nor otherwise to be wired electrical or electronic cable tension sensor.

In an advantageous embodiment of the invention, it is provided that the blocking devices are each designed as a catch device with a catch as a blocking element,
that locking devices are provided as a counter bearing for the catch pawls with a series of ratchet teeth or detent openings, which block a relative movement of latching device and in the blocking position moving catch in a blocking direction and allow in a reverse direction while slipping over the sear and
in that the blocking directions of the first and the second blocking device are opposite.

In the invention, it is provided that the load monitor is set so as to detect a changed load caused by any intervention of each of the first and second blockers to turn off the motor-drive unit.

In an advantageous embodiment of the invention, it is provided that the pulling mechanism in the opening direction with a third biasing force - in particular a counterbalancing device - is biased and that the load monitoring device is set to detect a released preload force in Zugmittelbruch and blockade by the first blocking device.

In a specific embodiment, for example, a door leaf to be lifted for opening is biased by a spring device for weight compensation. If a closing of the door leaf is blocked, this is held in the raised position by the blocking device; i.e. the spring force of the spring device is released and thus increases the engine load of the moving in the closing direction of the door drive. The load monitor is set to detect this load change.

In the invention it is provided that the load monitoring device for monitoring the load for monitoring a load-dependent parameter of the motor drive unit, in particular the motor current, the motor power or a rotational speed, is set up.

In an advantageous embodiment of the invention it is provided that the load monitoring device is formed by detecting the Torbewegungsrichtung, within a blockage by one of the blocking devices and / or detecting the type and / or the amount of a detected caused by intervention of one of the blocking devices change of the load for detecting is at which traction means a tensile stress has decreased.
The invention also relates, according to a further aspect, to a gate provided with a traction mechanism monitoring device according to the invention.

Fig. 1

eine Draufsicht auf ein automatisch angetriebenes Tor in Form eines Sektionaltores mit einer Torantriebsvorrichtung, die einen Zugmechanismus und ein Motorantriebsaggregat an einem als Wellentorantrieb ausgebildeten Torantrieb aufweist;

Fig. 2

eine schematische, teilweise geschnittene Seitenansicht auf das Tor mit Torwelle und Wellentorantrieb;

Fig. 3

eine erste perspektivische Ansicht einer Basisstruktur des Wellentorantriebes mit Motor, Elektroeinheit und Abtriebswelle;

Fig. 4

eine zweite perspektivische Ansicht der Basisstruktur des Wellentorantriebes;

Fig. 5

eine Ansicht vergleichbar derjenigen von Fig. 4 mit eingesetztem Getriebe zwischen Motorwelle und Abtriebswelle;

Fig. 6

eine Detailansicht einer rechten unteren Ecke des in Fig. 1 lediglich schematisch dargestellten Tores mit einer ersten Blockiereinrichtung;

Fig. 7

einen Horizontalschnitt durch den in Fig. 6 gezeigten rechten unteren Eckbereich des Tores;

Fig. 8

eine rechte Seitenansicht auf den in Fig. 6 gezeigten rechten unteren Eckbereich des Tores in einem normalen Betriebszustand;

Fig. 9

eine Ansicht vergleichbar von Fig. 8 in einer Blockierstellung;

Fig. 10

eine seitenverkehrte, teilweise geschnittene Seitenansicht eines linken unteren Eckbereiches des in Fig. 1 nur schematisch dargestellten Tores mit einer zweiten Blockiereinrichtung.

Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. It shows:

Fig. 1

a plan view of an automatically driven gate in the form of a sectional door with a door drive device having a pulling mechanism and a motor drive unit on a gate drive designed as a gate operator;

Fig. 2

a schematic, partially sectioned side view of the gate with Torwelle and Wellentorantrieb;

Fig. 3

a first perspective view of a basic structure of the Wellentorantriebes with motor, electrical unit and output shaft;

Fig. 4

a second perspective view of the basic structure of the Wellentorantriebes;

Fig. 5

a view comparable to that of Fig. 4 with inserted gearbox between motor shaft and output shaft;

Fig. 6

a detail view of a lower right corner of the in Fig. 1 only schematically shown gates with a first blocking device;

Fig. 7

a horizontal section through the in Fig. 6 shown right lower corner of the gate;

Fig. 8

a right side view on the in Fig. 6 shown right lower corner of the door in a normal operating condition;

Fig. 9

a view similar to Fig. 8 in a blocking position;

Fig. 10

a reversed, partially sectioned side view of a lower left corner of the in Fig. 1 only shown schematically gates with a second blocking device.

In the Fig. 1 and 2 an automatically driven gate 10 is shown with a door drive device 11, which has a door shaft 12, a pulling mechanism 13 and a gate drive 14 designed as a shaft gate drive or direct drive.

The gate 10 has a guide 16 between a closing end position and an opening end position in the opening direction R1 and closing direction R2 movable door leaf 18 on. The Torwelle 12 is formed as part of a weight balancing device 20 and has a force storage device, here in the form of two torsion springs 22, which exerts a biasing force in the opening direction R1 to balance the weight of the door leaf 18 as much as possible during its movement. For this purpose, the door shaft 12 is coupled by means of the gear mechanism 13 to the door leaf 18 in such a way that the door shaft 12 rotates when moving the door leaf 18.

In the illustrated embodiment, when driven by the door drive 14 movement of the door shaft 12 from the right in Fig. 1 seen counterclockwise the door leaf 18 in the upward opening direction R1 pulled up over the pulling mechanism 13. Upon rotation of the door shaft 12 in a clockwise direction (from the right in Fig. 1 seen), the tension mechanism 13 is relieved, the door leaf 18 largely by its own weight maintains a tensile stress in the pulling mechanism 13 and moves in the closing direction R2 down until it is in the in Fig. 1 is shown closing end position.

For a better overview, see Fig. 1 the representation of the guide 16 omitted. How one Fig. 2 can take, the guide 16 on each side of a guide rail 16a for rollers 18a of the door leaf 18, which has a vertical rail portion 16b, a horizontal rail portion 16c and a bent transition region 16d therebetween. The door leaf 18 is guided in the guide 16 on both sides exactly adapted, so that it runs very easily in the guide 16 and even with only one-sided train on only one of the two in the opening and closing direction extending sides S1, S2 runs without tilting.

The pulling mechanism 13 has on a first side S1 of these vertical sides of the door 10 at least one first pulling means Z1 and on the opposite other second side S2 of the vertical sides of the door 10 at least one second pulling means Z2. In the illustrated example, the pulling mechanism 13 on the door shaft 12 co-rotating cable drums 24a and 24b, namely a first cable drum 24a on the first side S1 and a second cable drum 24b on the second side S2. As first traction means Z1 at least two parallel acting on the first cable drum wound up first ropes 26a are provided in the form of wire ropes in the illustrated embodiment. As second traction means Z2 at least two parallel acting second ropes 26b, also in the form of wire ropes, are provided on the second side. In a cost-effective and therefore preferred embodiment, not shown, only one wire rope is provided on each side.

The traction means Z1 and Z2 are designed so that both the at least one first traction means Z1 and the at least one second traction means Z2 are each able to hold and move the door leaf 18 on its entire course alone, even if the other one Traction on the other side of S1, S2 should fail.

The door drive device 11 further has a traction means monitoring device 28, by means of which a breakage of the first traction means Z1 and a break of the second traction means Z2 or for other reasons, such as a breakage of a torsion spring 22 occurring decrease in tension of one of the traction means Z1 or Z2 is monitored and in such a case the operation of the automatic gate is stopped after at most one more door drive.

The door operator 14 is connected to one end of the door shaft 12 for rotatably driving the same.

In Fig. 2 further walls 28 of a building 30 are shown, which has a closable by the gate 10 door opening 32. The door drive 14 is produced in industrial mass production and is so adaptable in its manufacture that it can be adapted to different gates 10 and different buildings 30 with corresponding installation situations.

The door drive 14 has, as out Fig. 2 can be seen, a drive housing 34. The drive housing 34 has a plurality of hoods or covers 36, 37. By doing actual drive housing 34, the drive elements are mounted on a support structure or base structure 40.

The Fig. 3 to 5 show the door operator 14 without the covers 36 and 37, so that the drive elements and the base structure 40 can be seen.

The base structure 40 has a first base structure part 42 and a second base structure part 44, which are detachably connected together at a fastening interface 46.

The first base structure part 42 is formed as a base plate or base plate 48. On the base plate 48, a motor drive unit 49 with a motor 50, an electric unit 52, a decoupling device 54 and a decoupling sensor 56 is attached.

The motor 50 is designed as a geared motor and has a motor housing 58, an electric motor 60 and a self-locking worm gear 62. Accordingly, the output shaft of the motor 50, hereinafter referred to as the motor shaft 64, is connected to the output shaft (not shown) of the worm gear 62. This motor shaft 64 has - as best in Fig. 4 shown - a first gear in the form of a first sprocket 66.

The electrical unit 52 has a power unit 68 with transformer and power electronics and a controller 70 which controls the electric motor 60 via the power unit 68.

By means of the decoupling device 54, the motor shaft 64 can be decoupled from the worm gear 62, so that the first sprocket 66 can rotate freely in the decoupled state. For this purpose, the decoupling device 54 has a manually actuated by not shown actuating elements coupling pin 72 which controlled by a rotation in an in Fig. 3 shown cam 74 is axially movable. This axial movement is via a acting as a lever element coupling claw 76 (see Fig. 4 ) are transmitted to the pins (not shown) on the motor shaft 64 so as to be movable in the axial direction from being engaged with engagement holes 66a on the first sprocket 66.

As a result, the first sprocket 66 is freely rotatable on the motor shaft 64 in the decoupled state.

The uncoupling sensor 56 detects a movement of the coupling pin 72 and thus a uncoupling operation.

The motor 50 is further provided with an absolute encoder, not shown, which supplies the absolute rotational angular position of the worm gear 62 to the controller 70.

The controller 70 is designed such that, upon receipt of a signal of the uncoupling sensor 56, which indicates a clutch state that is again restored after a disengaging operation, it carries out a reference travel for the door 10, in which the position, in particular the end positions, of the door leaf 18 are taught , Alternatively or additionally, the or a further absolute encoder 57 is provided by means of a Geberzahnritzels 57a for tapping the gate position on a drive chain of a later described in more detail Zugmittelgetriebes 94. Since the encoder pinion 57a also runs in the uncoupled state with the door shaft 12, the re-learning drive is unnecessary after the re-coupling operation.

Further, in the controller 70, a load monitoring device 78 is provided which monitors a load of the motor 50 and causes a shutdown of the motor 50 in case of overload. The load monitor 78 monitors at least one of various load-dependent parameters of the motor 50, such as the motor current, the power input of the motor 50, or the speed of the motor as measured by the absolute value sensor, etc. In particular, the load monitor 78 is as described more fully in U.S. Pat EP 0 083 947 B1 is described and illustrated, designed such that during reference travel, a desired value for the monitored parameter is recorded as a function of the queried via the absolute encoder 57 way and is used with the addition of a difference value as a shutdown threshold. In the formation of the difference value parameters of Zugmittelüberwachungseinrichtung 28 enter, as will be shown in more detail below.

According to the Fig. 3 to 5 the second base structure part 44 is likewise designed as a plate, which can be connected to the base plate 48 via the attachment interface 46. The second base structure part 44 has an output shaft 80 of the door drive 14, which is rotatably mounted on a bearing 82 arranged at a certain radial distance from the motor shaft 64. The output shaft 80 has on one side a shaft coupling 84 with a connection part 86, which can be placed on the end of the door shaft 12.

A radially inwardly pointing projection 88 engages when placed on a longitudinal groove (not shown) provided on the door shaft 12, so that the connecting part 86 is non-rotatably mounted on the door shaft 12.

At the other end, the output shaft 80, a second gear, here in the form of a second sprocket 92, on. The two gear wheels on the motor shaft 64 and the output shaft 80 are connected via the traction mechanism 94 with each other geared. The traction mechanism 94 has a drive chain 96 in the embodiment shown here.

For fastening the second base structure part 44, the first base structure part 42 has two openings, the attachment interface 46 on the second base structure part 44 has openings 100, 101 provided with an appropriate spacing from the openings of the first base structure part 42. By means of these openings on the base structure parts 42, 44, screw fasteners 102 are sufficient to fasten the two base structure parts 42, 44 together.

Both the first and the second base structure part 42, 44 is provided with an angled, for example, bent edge region 104, 105. At the attachment interface 46, the two base structure parts 42, 44 engage with their angled edge regions 104, 105 telescopically. The openings on one of the two base structure parts 44, 42 are designed as elongated holes. In the example shown here, the openings 100, 101 are made on the second base structure part 44 as such elongated holes. The elongated holes 106, 108 have a width which is smaller than the diameter of the circular openings on the other base structure part.

The first base structure part 42 serves for fastening the door drive 14 in the vicinity of the door shaft 12 and has for this purpose, for example. not shown screw openings for the door drive attachment. The second base structure portion 44 is implemented as a modular drive component and may be replaced by other second base structure portions providing a different distance of the output shaft 80 from the motor drive assembly 49 and / or other gear ratios through another second sprocket 92 having a different number of sprocket teeth.

The following is with reference to Fig. 1 the structure of Zugmittelüberwachungseinrichtung 28 explained in more detail. The traction means monitoring device 28 has a purely mechanically acting first blocking device 150 on the first side S1 and a purely mechanically acting second blocking device 160 on the second side S2 and further on the load monitoring device 78.

The first blocking device 150 is provided with a first blocking element 154 and with a first voltage sensing and holding device 156. The first blocking element 154 is biased into a blocking position in which it detects a first latching device 158 formed on the guide 16, namely on the vertical rail section 16b, thus blocking a return movement of the door leaf 18 in the closing direction R2. In the opening direction R1, however, the first blocking element 154 driven into the blocking position can be moved over the first Slide locking device 158 away, so that the door leaf 18 can continue to move in the opening direction R1 even when the first blocking element 154 is extended. The first Spannungsfühl- and holding device 156 feels the traction means of the at least one first traction means Z1 and holds the first blocking element 154 in a release position in existing Zugmittelspannung in which the first blocking element 154 is released from the first latching device 158, so that the door leaf 18 free and is easy to move. In case of failure of the traction means of the first traction means Z1, the first Spannungsfühl- and holding device 156 is moved by a bias to a second position in which it releases the first blocking element 154 so that it moves by its own bias in the blocking position.

Similarly, the second blocking device 160 is formed, with the difference that it is active in the opposite direction as the first blocking device 150.

Accordingly, the second blocking device 160 is provided with a second blocking element 164 and with a second voltage sensing and holding device 166. The second blocking element 164 is biased into a blocking position in which it detects a second latching device 168 formed on the guide 16, specifically on the vertical rail region 16b, and thus blocks a movement of the door leaf 18 in the opening direction R1. In the closing direction R2, however, the second blocking element 164 driven into the blocking position can slide over the second latching device 168, so that the door leaf 18 can continue to move in the closing direction R2 even when the second blocking element 164 is extended. The second Spannungsfühl- and holding device 166 feels the traction means of the at least one second traction means Z2 and holds at Zugmittelspannung the second blocking element 164 in a release position in which the second blocking element 164 is released from the second latching device 168, so that the door leaf 18 free and is easy to move. In case of failure of the traction means of the second tension means Z2, the second Spannungsfühl- and holding means 166 by a bias in a second Moves position in which it releases the second blocking element 164 so that it moves by its own bias in the blocking position.

The more detailed structure of the blocking devices 150, 160 will be described below with reference to the illustration in FIGS Fig. 6 to 10 explained in more detail, wherein the Fig. 6 to 9 show an embodiment of the first blocking device 150 and Fig. 10 shows an embodiment of the second blocking device 160, which is modified with regard to the direction of action and with regard to the design of the latching device with respect to the embodiment of the first blocking device 150.

The first blocking device 150 is designed in the form of a gear 152. As in particular from the 6 and 7 it can be seen, the rollers 18a are attached to the door leaf 18 via roller holders 202 and guided in guide rails 204 of the guide 16. The guide rails 204 are fixed by means of brackets 205 in the region of the boundary 206 of the door opening 32.

In the in 6 and 7 shown example catch rods 207 are attached to the brackets 205 at the same time. These can also be integrally formed with the guide rails 204 in other embodiments, not shown. The catch rails 207 have the first latching device 158, which is formed by a series of longitudinally successively arranged catching openings 208 on the catching rails 207. In the in Fig. 6 to 9 In the illustrated embodiment, the catching openings 208 are formed by holes punched out simply from the catching rail 207, in a more preferred embodiment, which are described in US Pat Fig. 1 and Fig. 10 is indicated for the second blocking device 160, the catching openings 208 are formed by expressions, so that in the opening direction inclined planes for the sliding over the first blocking element 154 are formed, which pointing in the opening direction R1 boundary as a counter-attack for blocking the first blocking element 154 in the closing direction R2 acts. In the narrow side region of the door leaf 18, a blocking element housing 210 forming a first holding part of the first voltage sensing and holding device 156 is arranged. At the catch rail 207 opposite housing side engages a guide fitting 211, so that in the case of blocking against the Door leaf 18 along its narrow side shifting blocking element housing 210 with located in the blocking position first blocking element 154 can not dodge away from the catch rail 207.

Fig. 6 shows, as well as the 8 and 9 , a bolt 212 formed as a further part of the first tension sensing and holding device 156 which engages a mounting bolt 227 at 213, wherein 213 may be an eyelet within a tab. This bolt 212 engages through the lower end face 217 of the blocking element housing 210 in its interior. By the end face opposite this upper end face 216, a clamping sleeve 215 is guided, with which a here as the first traction means Z1 serving first rope (wire ropes) 26a is formed into a loop shaped.

The partial sectional representations after the 8 and 9 show the formation of the blocking element housing 210 and the associated components clearly. The blocking element housing 210 has, within its longitudinal side wall 218 facing the catching rail 207, a lateral opening 219 for reaching through the first blocking element 154, which opening 219 faces the housing side 220, on which the guide fitting 211 engages supportingly. Further lateral housing walls 221, which extend perpendicular to the longitudinal side wall 218 and the housing side 220 and of which only recognizes the rear due to the sectional view, hold therebetween a pivot axis 222 about which formed as a sear 223 first blocking element 154 is pivotally mounted. These housing walls 221 with the pivot axis 222 are designed to be telescopically displaceable relative to the longitudinal side wall 218 and the housing side 220 and thus form a second holding part of the voltage sensing and holding device 156.

As Fig. 8 can recognize, is the pivoting pawl together with a trained for detecting the latching device 158 latch nose 224 within the blocking element housing 210 when the squirrel 223 is due to a sufficient stress state in the associated cable 26a in the release position, which represents the normal operation case. The means of the Eyelet 213 and the fastening bolt 227 held in the lower side region of the door leaf 18 bolts 212 passes through the lower end face 217 by a passage opening 228 slidably. In its end region, the bolt 212 is provided with a head 229, which is designed widened so that the side surfaces of the head 229 is guided on the Gehäuseinnenwandungen. Between the inner wall of the lower end face 217 of the blocking element housing 210 and the lower surface of the head 229 opposite thereto, a biasing element (in the example a helical compression spring 232) is provided for providing a first biasing force. To the helical compression spring 232 around a sleeve-shaped stopper 233 is arranged, which in turn is supported one end on the inner surface of the end face 217 and the other end on the lower surface of the head 229 facing this.

As in Fig. 8 shown, the bolt 212 is at tensioned cable 26a with its head 229 in abutment with the stop 233, so that the helical compression spring 232 has their greatest possible compression.

At the head 229, a chamfer 230 is formed. In a complementary manner, an inclined surface 231 is formed on the sear 223, starting from the latch nose 224, which rests against the bevel 230.

As the cable 26a breaks, the first biasing force of the coil spring 232 shifts the housing 210 downward. Further, the pivot axis 222 is displaced by a further coil spring 236 relative to the housing 210. The sear 223 is thus pushed by the bolt 212 outwards into its blocking position, as in Fig. 9 is shown. There, the head is shown at 240 in dash-dotted line.

In the Fig. 10 illustrated second blocking device 160 is shown comparable to the first blocking device, but does not work for a blockade in the closing direction, but in the opening direction. Accordingly, the second squeezing pawl 323 used as the second blocking element 164 is correspondingly directed in the opposite direction; and the second latch 168 faces down directed locking projections 370, over which the deflected at break of the second rope 26 b second sling 323 can slide away during a movement of the door leaf 18 down. The deflection is done by acting on a second biasing force provided by a spring unit 324. In a movement upward, however, engages the pawl nose 324 of the second sear 323 at the lower edge of the next higher locking lug of the second locking device 168, thus blocking a further travel of the door leaf 18 upwards, if the second cable breaks 26b.

The differential value of the load monitoring device 78 is adjusted so sensitively that each blockage of one of the two blocking devices 150, 160 caused by loosening of a tensile stress in one of the traction means is detected and leads to a shutdown of the door drive 14, in particular such that initially the motor 50 still slightly moves in the opposite direction to relieve the remaining traction means.

Due to the possibility of blocking in both directions, all situations of a failure of one of the traction means Z1, Z2 can be detected. At the latest after completion of the corresponding journey in which the failure occurs and in the attempt to drive in the opposite direction, the blockage is effective, so that the door drive 14 is set to a standstill and further loading of the remaining traction means is omitted.

If, for example, the first cable 26a tears, then the door leaf 18 can still be moved upwards in the opening direction R1 with the first blocking element 154 extended, where the door leaf 18 is prevented from falling down and moving in the closing direction R2 by the first blocking device 150. If then again the door drive 14 is operated to drive the door leaf in the closing direction R2, then the door shaft 12 is moved without the door leaf 18. The rotation must then take place counter to the third biasing force of the weight balancing device and thus with greater force. This can be detected by the load monitoring device 78 and is used to switch off the door drive 14. In addition, the second traction means Z2 is then loosened, so that the second blocking device 160 engages and a Procedure of the door leaf 14 is blocked in any direction. As a result, the remaining traction means Z2 is relieved, without the risk of a crash of the door leaf 18 exists.

On the other hand, if the second traction means Z2 tears, then a corresponding blockade by the second blocking device 160 occurs immediately when driving in the opening direction R1.

This results in an increased load on the door drive 14, which is detected by the load monitoring device 78 and leads to a shutdown of the door drive 14.

If the traction means tension of the second traction means Z2 in the course of a closing trip, so the second blocking device 160 triggers, the door leaf 18 but then moves into the closed position, where it is prevented by the second blocking device 160 at a renewed drive in the opening direction R1 , which in turn leads to a shutdown.

Based on the type or location of the load shutdown and / or the direction of travel during which the shutdown occurs, the controller 70 can thus determine on which side S1, S2 a voltage drop has occurred and can issue a corresponding error message, for example as plain text.

Other embodiments not shown are possible. For example, the second latch 168 need not - as in Fig. 1 shown - extend over the entire region of the vertical guide 16b. It is sufficient if only a lower area is provided with the second latching device 168. Then falls the second traction means Z2 in the in Fig. 2 shown closed position - which represents the most common operating state of the gate - from, then immediately the second blocking device 160 is blocked, and the gate 10 can not be opened. For example, this is the second locking device seen from below only provided with about 3 to 10 second locking elements, which are detected by the sear 323. It could thus be that above the in Fig. 10 shown Area of the guide 16 no locking elements of the second locking device 168 are more available. In a preferred embodiment, then above the last latching element of the second latching device 168 up to the highest position of the second blocking device 160, a further first latching device 158 is provided with corresponding latching elements for preventing a fall of the door leaf 18 in the closing direction R2.

In this embodiment, the second sear 323 is either designed so that it can be supported against the first latching device 158 against movement in the closing direction R2 and can be supported against the first latching device 168 against movement in the opening direction R1. In another alternative embodiment, the second blocking element 164 is formed with two catch pawls, namely once with a first catch 223 and secondly a second catch 323, both of which are triggered upon breakage of the second pulling means Z2.

LIST OF REFERENCE NUMBERS

10

gate

11

door drive

12

door shaft

13

pulling mechanism

14

door drive

16

guide

16a

runner

16b

vertical rail area

16c

horizontal track area

16d

curved transition area

18

door leaf

18a

castors

20

Weight balancer

22

torsion spring

24a

first cable drum

24b

second cable drum

26a

first ropes

26b

second ropes

28

Zugmittelüberwachungseinrichtung

30

building

32

door opening

34

drive housing

36

cover

37

cover

40

base structure

42

first basic structure part

44

second base structure part

46

Mounting interface

48

baseplate

49

Motor drive unit

50

engine

52

electrical unit

54

Uncoupling

56

Entkuppelsensor

57

Absolute encoders

57a

donor tooth

58

motor housing

60

electric motor

62

worm gear

64

motor shaft

66

first sprocket (gear wheel)

66a

engaging openings

68

power unit

70

control

72

coupling pin

74

cam

76

coupling claw

78

Load monitoring device

80

output shaft

82

camp

84

shaft coupling

86

connector

88

head Start

92

second sprocket

94

traction drives

96

drive chain

100

Opening on the second base structure part

101

Opening on the second base structure part

102

threaded fasteners

104

angled edge area

105

angled edge area

106, 108

slots

150

first blocking device

152

fishing gear

154

first blocking element

156

first voltage sensing and holding device

158

first latching device

160

second blocking device

164

second blocking element

166

second voltage sensing and holding device

168

second locking device

202

roll holder

204

guide rails

205

brackets

206

boundary

207

Fang rails

208

collection openings

210

Blocking element housing

211

guide fitting

212

bolt

213

eyelet

215

collet

216

upper end side

217

lower front side

218

Longitudinal side wall

219

lateral opening

220

case side

221

lateral housing walls

222

swivel axis

223

(first) catch

224

latching tab

227

mounting bolts

228

Through opening

229

head

230

bevel

231

sloping surface

232

Helical compression spring

233

attack

236

coil spring

240

relative to the housing deflected bolt

323

second catch

324

spring unit

370

catch projection

R1

opening direction

R2

closing direction

S1

first page

S2

second page

Z1

first traction means

Z2

second traction means

Claims (11)

1. Door drive device (11) for driving a door leaf (18) in an opening direction (R1) and a closing direction (R2) via a traction mechanism (13), which comprises at least a first traction means (Z1) and at least a second traction means (Z2), which traction means (Z1, Z2) are subjected to a tensile load during the operation of the door drive device (11), wherein the door drive device (11) includes a traction means monitoring device (28) configured for both monitoring the first traction means (Z1) for breakage or a voltage drop and monitoring the second traction means (Z2) for breakage or a voltage drop,
   wherein the traction means monitoring device (28) includes a first mechanical blocking device (150), which is provided with a first blocking element (154) which in a blocking position blocks or impedes the movement of the door leaf (18) in the closing direction but allows a movement of the door leaf (18) in the opening direction and in a releasing position releases the movement of the door leaf (18) in the closing direction (R2) and opening direction (R1), and which is provided with a first tension sensing and holding device (156) for sensing a traction means tension of the first traction means (Z1) and for holding the first blocking element (154) as a function of this traction means tension, wherein the first tension sensing and holding device (156) holds the first blocking element (154) in the releasing position and at a reduction of a tension of the first traction means (Z1) initiates a movement of the first blocking element (154) to its blocking position by a first preload force,
   characterized in
   that the traction means monitoring device (28) further includes a second mechanical blocking device (160) and a load monitoring device (78),
   that the second mechanical blocking device (160) is provided with a second blocking element (164), which in a blocking position blocks or impedes the movement of the door leaf (18) in the opening direction but allows a movement of the door leaf (18) in the closing direction and in a releasing position releases the movement of the door leaf (18) in the closing direction (R2) and opening direction (R1), and is provided with a second tension sensing and holding device (166) for sensing a traction means tension of the second traction means (Z2) and for holding the second blocking element (164) as a function of this traction means tension, wherein the second tension sensing and holding device (166) holds the second blocking element (164) in the releasing position and at a reduction of a tension of the second traction means (Z2) initiates a movement of the second blocking element (164) to its blocking position by a second preload force,
   that the load monitoring device (78) is configured for monitoring a motor driving unit (49) to be connected to the traction mechanism (13) for driving the door leaf (18), for exceeding a load threshold, wherein for monitoring the load, the load monitoring device (78) is configured for monitoring a load-dependent parameter of the motor driving unit (49) such as in particular the motor current, motor power or speed, and
   that the load monitoring device (78) is set in a manner such as to detect a changed load caused by any intervention of each of the first and second blocking devices (150, 160) in order to switch off the motor driving unit (49).
2. Door drive device according to claim 1,
   characterized in that traction mechanism (13) is a cable pull mechanism transmitting the rotation of a shaft (12), which is rotationally driven by the motor driving unit (49), to the door leaf (18), and which comprises at least a first cable (26a) as a first traction means (Z1) and at least a second cable (26b) as a second traction means (Z2).
3. Door drive device according to claim 2,
   characterized in that on a first one (S1) of two opposing sides (S1, S2) of the door leaf (18) that preferably extend in the opening and closing directions, at least a first cable (26a) is respevctively provided, wherein the first blocking device (150) and/or the first tension sensing and holding device (156) is only provided on this first one (S1) of the two opposing sides in order to monitor only the tension of the at least one first cable (26a) on this first side (S1).
4. Door drive device according to claim 2 or 3,
   characterized in that on a second one (S2) of two opposing sides (S1, S2) of the door leaf (18) that preferably extend in the opening and closing directions, at least a second cable (26b) is respectively provided, wherein the second blocking device (160) and/or the second tension sensing and holding device (166) is only provided on this second (S2) of the two opposing sides in order to monitor only the tension of the at least one second cable (26a) on this second side (S2).
5. Door drive device according to claim 3 and according to claim 4,
   characterized in
   that on the first one (S1) of the two sides the first blocking device (150) is provided, for monitoring the tension of the at least one first cable (26a) on this first side (S1) and
   that on the remaining second side (S2) of the two sides (S1, S2) the second blocking device (160) is provided, for monitoring the tension of the at least one second cable (26b) on this second side (S2).
6. Door drive device according to one of the claims 2 to 5,
   characterized that the traction means monitoring device (28) has no cable-slack switch and no tension sensors to be wired for monitoring the cable pull tension.
7. Door drive device according to any one of the preceding claims,
   characterized in
   that the blocking devices (150, 160) are each configured as catch pawl devices having a catch pawl (223, 323) as a blocking element (154, 164), that latching devices (158, 168) having a series of latching teeth (370) or latching openings (208) are provided as an abutment for the catch pawls (223, 323), which latching teeth or latching openings inhibit a relative movement of the latching device (158, 168) and the catch pawl (223, 323) moved to the blocking direction in a blocking direction and allow such a relative movement in the opposite direction with the catch pawl sliding over it and
   that the blocking directions of the first and the second blocking devices (150, 160) are opposite to each other.
8. Door drive device according to claim 7,
   characterized in that the tension sensing and holding devices (156, 166) each comprise a first and a second holding part, which are held one upon the other so as to be telescopically displaceable in relation to each other and are preloaded in a telescoped condition and are held in a condition in which they are pulled apart against this preload by the traction means tension to be sensed, wherein in the condition in which they are pulled apart, they hold the associated catch pawl (223, 323) in its releasing position, wherein during its movement into the telescoped condition the catch pawl is movable into its blocking position under the action of the preload force.
9. Door drive device according to one of the preceding claims,
   characterized in that the traction mechanism (13) is preloaded in the opening direction with a third preload force (22) and that the load monitoring device (78) is adjusted for detecting the third preload force, which is released in the event of failure of the tension of the traction means and a blockage by a blocking device (150).
10. Door drive device according to one of the preceding claims, characterized in that the load monitoring device (78) is configured for detecting the traction means (Z1, Z2) at which a tension has slackened, by detecting the door moving direction in which a blockage by one of the blocking devices occurs and/or by detecting the nature, location and/or amount of a detected change of the load caused by engaging of one of the blocking devices (150, 160).
11. Automatically driven door (10), characterized by a door drive device (11) according to one of the preceding claims.

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