EP1788187A2 - Fall protection device for a closure - Google Patents

Fall protection device for a closure Download PDF

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Publication number
EP1788187A2
EP1788187A2 EP06019562A EP06019562A EP1788187A2 EP 1788187 A2 EP1788187 A2 EP 1788187A2 EP 06019562 A EP06019562 A EP 06019562A EP 06019562 A EP06019562 A EP 06019562A EP 1788187 A2 EP1788187 A2 EP 1788187A2
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EP
European Patent Office
Prior art keywords
worm wheel
output shaft
auxiliary
auxiliary worm
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06019562A
Other languages
German (de)
French (fr)
Other versions
EP1788187B1 (en
EP1788187A3 (en
Inventor
Wolfgang Mittermeyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sigl Elektromotoren GmbH and Co KG
Original Assignee
Sigl Elektromotoren GmbH and Co KG
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Publication of EP1788187A2 publication Critical patent/EP1788187A2/en
Publication of EP1788187A3 publication Critical patent/EP1788187A3/en
Application granted granted Critical
Publication of EP1788187B1 publication Critical patent/EP1788187B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7009—Rotary binding cam or wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7009—Rotary binding cam or wedge
    • Y10T403/7011—Radially interposed shim or bushing
    • Y10T403/7013—Arcuate slip
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19828—Worm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/1987—Rotary bodies
    • Y10T74/19893—Sectional
    • Y10T74/19944—Shaft-admitting insert

Definitions

  • the invention relates to a safety device for closure devices, such as gates, according to the preamble of claim 1.
  • Such safety devices serve as fall protection for closure devices, which are equipped with a non-rotatably connected to a winding shaft wear shaft worm wheel and a self-locking screw, which is in communication with a drive shaft.
  • Such capture devices are used in gates whose sash weight is not compensated by springs, to ensure their safe operation.
  • a crash of the door leaf is prevented.
  • Such safety gears can be mounted directly on the door shaft or integrated in the drive.
  • Integrated safety devices have already become known which, in the event of a suspension element breakage, catch the load via a second, load-free, revolving worm wheel set. Furthermore, catching mechanisms are known in which an auxiliary worm wheel Runs (approximately) load-free and twisted in the case of a Tragstoffbruchs relative to Schwarzneckenrad. As a result, on the one hand spring-loaded bolts are released to lock into corresponding pockets that are suitable to intercept the load form fit. According to another alternative rotatably mounted clamping pieces can be rotated so that they create radially against the housing wall and bring the load frictionally to a stop.
  • the safety device is that two arranged on the winding shaft worm wheels are each driven by a separate worm.
  • a screw drive as a working drive is constantly under load, while the other Schnekken drive runs as an auxiliary worm drive unloaded.
  • the self-locking and limited axially displaceably mounted auxiliary screw is self-load with its auxiliary worm wheel in combination.
  • the auxiliary worm drive comes under load, at the same time interrupting the transmission of the drive torque to the auxiliary worm is interrupted at a predetermined breaking point.
  • the auxiliary worm comes to rest on a housing-fixed stop pin.
  • the drive worm and the auxiliary worm are mounted on parallel, separate shafts whose kinematic connection consists of a spur gear. Because of the second worm shaft, its drive and the necessary bearings builds this known safety gear quite expensive.
  • This complex structure is simplified in that only one worm wheel is provided, which meshes with the self-locking screw on the one hand and the auxiliary check on the other hand.
  • Both snails are here designed as globoid half snails.
  • the self-locking screw and the auxiliary screw are arranged one behind the other on a common working shaft.
  • the self-locking screw forms a non-rotatable with the drive shaft Unit, while the auxiliary worm constantly runs over a driver unloaded and is mounted axially displaceable to compensate for the wear on the self-locking screw between fixed to the housing stops. If the self-locking screw breaks, the self-locking auger, which serves as a snail, supports the load against its stops.
  • Object of the present invention is to provide a safety gear of the type described above, which allows the simplest possible reliability with the simplest possible design.
  • a safety gear according to the features of claim 1. Accordingly, for a closure device, such as a gate, serving safety gear has a rotatably connected to an output shaft serving as a winding shaft worm wheel and a self-locking screw, which is in communication with a drive shaft. On an eccentric portion of the output shaft, an auxiliary worm wheel is additionally placed with play, wherein the auxiliary worm wheel also has an eccentricity of the same amount as the output shaft and is mounted such that cancel the eccentricities relative to the axis of the output shaft, the auxiliary worm wheel over a toothed area load can follow the movement of the Schnekkenrades.
  • the auxiliary worm wheel serving as a safety is not subject to wear during normal operation. If the worm wheel connected by rotation with the output shaft comes to the support element break due to wear or overload, the auxiliary worm wheel turns relative to the eccentric of the output shaft. As a result, the outer diameter of the auxiliary worm wheel moves out of a concentric position.
  • the eccentricity of the output shaft and the auxiliary worm wheel is designed so that a self-locking occurs.
  • the auxiliary worm wheel moves during movement from its concentric position out against a cylindrical portion of the gear housing.
  • the eccentricity is designed here so that the self-locking occurs between auxiliary worm wheel and gear housing.
  • the safety gear Since the entire safety gear consists of only one part, namely the attached auxiliary worm wheel, this is very easy and inexpensive to assemble.
  • the safety gear operates independently of the speed, direction of rotation and mounting position of the transmission and speaks continuously, that is independent of the division of any locking devices.
  • areas can be provided on the auxiliary worm wheel, which are specifically deformable.
  • the safety gear on an output shaft 10 which is only partially shown in Figure 1, arranged.
  • a worm wheel 12 which is non-rotatably slidable via a Nutfederfact 14 to the output shaft.
  • the output shaft additionally has a region 16 which is aligned eccentrically to the axis 18 of the output shaft.
  • an auxiliary worm wheel 20 can be pushed with slight play, which has an eccentric bore 22.
  • the eccentricities of the output shaft portion 16 and the bore 22 of the auxiliary worm wheel 20 approximately cancel each other with respect to the output shaft 18, so that the outer diameter of the worm wheel 12 and the auxiliary worm wheel 22 are concentric.
  • the auxiliary worm wheel 20 can follow its toothed region 24 of the force applied to the worm wheel 12 by means of a worm connected to a drive shaft 12 without load and thus without wear.
  • the auxiliary worm wheel 20 rotates due to the load against the eccentric 16 of the output shaft 10. This rotation is made possible by the game between the eccentric bore 22 and the eccentric portion 16. Due to this twisting movement, the outer diameter 26 of the auxiliary worm wheel 20 moves out of its concentric position and presses against a cylindrical region 28 (see FIG. 4) of the gear housing.
  • the eccentricity of the eccentric portion 16 of the output shaft 10 and the eccentric bore 22 of the auxiliary worm wheel 20 are designed so that a self-locking occurs between auxiliary worm wheel 20 and gear housing.
  • the resulting radial forces are based on correspondingly applied to the output shaft 10 bearings 30 and 32 on the transmission housing and thus prevent further rotation of the output shaft 10 relative to the auxiliary worm wheel 24.
  • the load acting as torque on the drive shaft 10 frictionally braked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Gear Transmission (AREA)
  • Transmission Devices (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Lock And Its Accessories (AREA)
  • Thermistors And Varistors (AREA)

Abstract

The fastening device has an auxiliary worm gear (20) with clearance is fitted on an eccentric area (16) of an output shaft (10). The auxiliary worm gear has an equal value eccentricity like the output shaft and is mounted in such a manner that the eccentricities are suspended relative to the axis (18) of the drive shaft. The auxiliary worm gear unencumbered the movement of a worm gear (12) by its indenting area.

Description

Die Erfindung betrifft eine Fangvorrichtung für Verschlussvorrichtungen, wie beispielsweise Tore, nach dem Oberbegriff des Anspruchs 1.The invention relates to a safety device for closure devices, such as gates, according to the preamble of claim 1.

Derartige Fangvorrichtungen dienen als Absturzsicherung für Verschlussvorrichtungen, die ein mit einer als Wickelwelle dienenden Abriebswelle drehfest verbundenen Schneckenrad und einer selbsthemmenden Schnecke, die mit einer Antriebswelle in Verbindung steht, ausgestattet sind.Such safety devices serve as fall protection for closure devices, which are equipped with a non-rotatably connected to a winding shaft wear shaft worm wheel and a self-locking screw, which is in communication with a drive shaft.

Derartige Fangeinrichtungen kommen bei Toren, deren Flügelgewicht nicht durch Federn ausgeglichen wird, zum Einsatz, um deren sicheren Betrieb zu gewährleisten. Hier wird im Fall eines Tragmittelbruchs am Antrieb ein Abstürzen des Torflügels verhindert. Derartige Fangvorrichtungen können direkt an der Torwelle angebracht werden oder im Antrieb integriert sein.Such capture devices are used in gates whose sash weight is not compensated by springs, to ensure their safe operation. Here, in the case of a suspension element breakage on the drive, a crash of the door leaf is prevented. Such safety gears can be mounted directly on the door shaft or integrated in the drive.

Es sind bereits integrierte Fangvorrichtungen bekannt geworden, die im Falle eines Tragmittelbruches die Last über einen zweiten, lastfrei mitlaufenden Schneckenradsatz auffangen. Ferner sind Fangmechanismen bekannt, bei denen ein Hilfsschneckenrad (annähernd) lastfrei mitläuft und sich im Falle eines Tragmittelbruchs relativ zum Arbeitsschneckenrad verdreht. Dadurch können einerseits federbelastete Bolzen freigegeben werden, um in entsprechende Taschen einzurasten, die geeignet sind, die Last formschlüssig abzufangen. Gemäß einer anderen Alternative können drehbar gelagerte Klemmstücke verdreht werden, so dass sie sich radial an die Gehäusewand anlegen und die Last reibschlüssig zum Stehen bringen.Integrated safety devices have already become known which, in the event of a suspension element breakage, catch the load via a second, load-free, revolving worm wheel set. Furthermore, catching mechanisms are known in which an auxiliary worm wheel Runs (approximately) load-free and twisted in the case of a Tragmittelbruchs relative to Arbeitsschneckenrad. As a result, on the one hand spring-loaded bolts are released to lock into corresponding pockets that are suitable to intercept the load form fit. According to another alternative rotatably mounted clamping pieces can be rotated so that they create radially against the housing wall and bring the load frictionally to a stop.

Beispielsweise aus der DE 22 22 503 C ist eine selbsttätig wirkende Sperrvorrichtung zum Verhindern eines ungewollten Abrollens eines Rolltores, Rollgitters, Rollladens oder dergleichen der eingangs angegebenen Art bekannt, bei der die Fangvorrichtung darin besteht, dass zwei auf der Wickelwelle angeordnete Schneckenräder jeweils von einer eigenen Schnecke angetrieben werden. Dabei ist ein Schneckenantrieb als Arbeitstrieb ständig unter Last, während der andere Schnekkenantrieb als Hilfsschneckentrieb unbelastet mitläuft. Die selbsthemmende und begrenzt axial verschiebbar gelagerte Hilfsschnecke steht selbstlastfrei mit ihrem Hilfsschneckenrad in Verbindung. Bei einem Versagen des Arbeitsschneckenantriebes kommt der Hilfsschneckenantrieb unter Last, wobei gleichzeitig an einer vorgesehenen Sollbruchstelle die Weiterleitung des Antriebsmoments zur Hilfsschnecke unterbrochen wird. Danach bleibt die Last durch die Selbsthemmung des Hilfsschneckentriebes stehen, wobei die Hilfsschnecke an einem gehäusefesten Anschlagbolzen zur Anlage kommt. Bei dieser bekannten Fangvorrichtung sind die Antriebsschnecke und die Hilfsschnecke auf parallelen, voneinander getrennten Wellen befestigt, deren kinematische Verbindung aus einem Stirnradgetriebe besteht. Wegen der zweiten Schneckenwelle, ihres Antriebes und der notwendigen Lagerungen baut diese bekannte Fangvorrichtung recht aufwendig.For example, from the DE 22 22 503 C is an automatically acting locking device for preventing unwanted rolling of a roll-up door, rolling grille, shutter or the like of the type specified, in which the safety device is that two arranged on the winding shaft worm wheels are each driven by a separate worm. In this case, a screw drive as a working drive is constantly under load, while the other Schnekken drive runs as an auxiliary worm drive unloaded. The self-locking and limited axially displaceably mounted auxiliary screw is self-load with its auxiliary worm wheel in combination. In the event of failure of the working worm drive, the auxiliary worm drive comes under load, at the same time interrupting the transmission of the drive torque to the auxiliary worm is interrupted at a predetermined breaking point. After that, the load remains standing by the self-locking of the auxiliary worm drive, the auxiliary worm comes to rest on a housing-fixed stop pin. In this known safety gear, the drive worm and the auxiliary worm are mounted on parallel, separate shafts whose kinematic connection consists of a spur gear. Because of the second worm shaft, its drive and the necessary bearings builds this known safety gear quite expensive.

Gemäß der DE 34 33 561 C wird dieser aufwendige Aufbau dadurch vereinfacht, dass nur noch ein Schneckenrad vorgesehen wird, das mit der selbsthemmenden Schnecke einerseits und der Hilfsschecke andererseits kämmt. Beide Schnecken sind hier als Globoid-Halbschnecken ausgebildet. Die selbsthemmende Schnecke und die Hilfsschnecke sind hintereinander auf einer gemeinsamen Arbeitswelle angeordnet. Die selbsthemmende Schnecke bildet mit der Antriebswelle eine drehfeste Einheit, während die Hilfsschnecke über einen Mitnehmer ständig unbelastet mitläuft und zum Ausgleich des Verschleißes an der selbsthemmenden Schnecke zwischen gehäusefesten Anschlägen axial verschiebbar gelagert ist. Bei einem Bruch der selbsthemmenden Schnecke stützt die selbsthemmende Hilfsschnecke, die hier als Fangschnecke dient, die Last gegen ihre Anschläge ab.According to the DE 34 33 561 C This complex structure is simplified in that only one worm wheel is provided, which meshes with the self-locking screw on the one hand and the auxiliary check on the other hand. Both snails are here designed as globoid half snails. The self-locking screw and the auxiliary screw are arranged one behind the other on a common working shaft. The self-locking screw forms a non-rotatable with the drive shaft Unit, while the auxiliary worm constantly runs over a driver unloaded and is mounted axially displaceable to compensate for the wear on the self-locking screw between fixed to the housing stops. If the self-locking screw breaks, the self-locking auger, which serves as a snail, supports the load against its stops.

Sämtliche vorgenannten Varianten mit integrierter Fangvorrichtung weisen eine hohe Anzahl von Einzelteilen auf, die zu einem hohen Montageaufwand und damit zu vergleichsweise hohen Montagekosten führen.All of the aforementioned variants with integrated safety gear have a high number of individual parts, which lead to a high installation effort and thus to relatively high installation costs.

Aufgabe der vorliegenden Erfindung ist es, eine Fangvorrichtung der eingangs angegebenen Art zur Verfügung zu stellen, die bei möglichst einfacher Bauart eine möglichst gute Betriebssicherheit ermöglicht.Object of the present invention is to provide a safety gear of the type described above, which allows the simplest possible reliability with the simplest possible design.

Erfindungsgemäß wird die Aufgabe durch eine Fangvorrichtung gemäß der Merkmale des Anspruchs 1 gelöst. Demnach weist die für eine Verschlussvorrichtung, beispielsweise ein Tor, dienende Fangvorrichtung ein mit einer als Wickelwelle dienenden Abtriebswelle drehfest verbundenes Schneckenrad und eine selbsthemmende Schnecke auf, die mit einer Antriebswelle in Verbindung steht. Auf einem exzentrischen Bereich der Abtriebswelle ist zusätzlich ein Hilfsschneckenrad mit Spiel aufgesetzt, wobei das Hilfsschneckenrad ebenfalls eine betragsgleiche Exzentrizität wie die Abtriebswelle aufweist und derart montiert ist, dass sich die Exzentrizitäten bezogen auf die Achse der Abtriebswelle aufheben, wobei das Hilfsschneckenrad über einen verzahnten Bereich lastfrei der Bewegung des Schnekkenrades folgen kann. Dadurch ist das als Sicherheit dienende Hilfsschneckenrad keinem Verschleiß während des üblichen Betriebs unterworfen. Kommt es nun bei dem drehfest mit der Abtriebswelle verbundenen Schneckenrad durch Verschleiß oder Überlast zum Tragmittelbruch, verdreht sich das Hilfsschneckenrad gegenüber dem Exzenter der Abtriebswelle. Dadurch rückt der Außendurchmesser des Hilfsschneckenrades aus einer konzentrischen Position heraus. Dabei ist die Exzentrizität der Abtriebswelle und des Hilfsschneckenrades so ausgelegt, dass eine Selbsthemmung eintritt.According to the invention the object is achieved by a safety gear according to the features of claim 1. Accordingly, for a closure device, such as a gate, serving safety gear has a rotatably connected to an output shaft serving as a winding shaft worm wheel and a self-locking screw, which is in communication with a drive shaft. On an eccentric portion of the output shaft, an auxiliary worm wheel is additionally placed with play, wherein the auxiliary worm wheel also has an eccentricity of the same amount as the output shaft and is mounted such that cancel the eccentricities relative to the axis of the output shaft, the auxiliary worm wheel over a toothed area load can follow the movement of the Schnekkenrades. As a result, the auxiliary worm wheel serving as a safety is not subject to wear during normal operation. If the worm wheel connected by rotation with the output shaft comes to the support element break due to wear or overload, the auxiliary worm wheel turns relative to the eccentric of the output shaft. As a result, the outer diameter of the auxiliary worm wheel moves out of a concentric position. The eccentricity of the output shaft and the auxiliary worm wheel is designed so that a self-locking occurs.

Gemäß einer bevorzugten Ausgestaltung der Erfindung bewegt sich das Hilfsschneckenrad bei Bewegung aus seiner konzentrischen Position heraus gegen einen zylindrischen Bereich des Getriebegehäuses. Die Exzentrizität ist hier so ausgelegt, dass zwischen Hilfsschneckenrad und Getriebegehäuse die Selbsthemmung eintritt.According to a preferred embodiment of the invention, the auxiliary worm wheel moves during movement from its concentric position out against a cylindrical portion of the gear housing. The eccentricity is designed here so that the self-locking occurs between auxiliary worm wheel and gear housing.

Da die gesamte Fangvorrichtung aus nur einem Teil, nämlich dem aufgesetzten Hilfsschneckenrad besteht, ist dieses sehr leicht und kostengünstig zu montieren. Die Fangvorrichtung arbeitet unabhängig von der Drehzahl, Drehrichtung und Einbaulage des Getriebes und spricht stufenlos, das heißt unabhängig von der Teilung etwaiger Sperrorgane an.Since the entire safety gear consists of only one part, namely the attached auxiliary worm wheel, this is very easy and inexpensive to assemble. The safety gear operates independently of the speed, direction of rotation and mounting position of the transmission and speaks continuously, that is independent of the division of any locking devices.

Besonders vorteilhaft und gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung können am Hilfsschneckenrad Bereiche vorgesehen sein, die gezielt verformbar sind.Particularly advantageous and according to a further advantageous embodiment of the invention, areas can be provided on the auxiliary worm wheel, which are specifically deformable.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung werden anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Figur 1:
eine explosionsartige Darstellung einer Fangvorrichtung gemäß einer Ausführungsform der vorliegenden Erfindung,
Figur 2:
eine perspektivische Darstellung der zusammengebauten Fangvorrichtung,
Figur 3:
eine Draufsicht auf die Fangvorrichtung gemäß Figur 2 und
Figur 4:
eine Schnittdarstellung durch einen Teil der Fangvorrichtung.
Further features, details and advantages of the invention will be explained in more detail with reference to an embodiment shown in the drawing. Show it:
FIG. 1:
an exploded view of a safety gear according to an embodiment of the present invention,
FIG. 2:
a perspective view of the assembled safety gear,
FIG. 3:
a plan view of the safety gear according to Figure 2 and
FIG. 4:
a sectional view through a part of the safety gear.

Gemäß der Explosionsdarstellung in Figur 1 ist die Fangvorrichtung auf einer Abtriebswelle 10, die in Figur 1 nur teilweise dargestellt ist, angeordnet. Auf dieser Abtriebswelle 10 sitzt ein Schneckenrad 12, das über eine Nutfederverbindung 14 drehfest auf die Abtriebswelle aufschiebbar ist. Die Abtriebswelle weist zusätzlich einen Bereich 16 auf, der exzentrisch zur Achse 18 der Abtriebswelle ausgerichtet ist. Auf diesen exzentrischen Bereich 16 ist ein Hilfsschneckenrad 20 mit leichtem Spiel aufschiebbar, das eine exzentrische Bohrung 22 aufweist. Die Exzentrizitäten des Bereichs 16 der Abtriebswelle und der Bohrung 22 des Hilfsschneckenrades 20 heben sich bezogen auf die Achse 18 der Abtriebswelle ungefähr auf, so dass die Außendurchmesser des Schneckenrads 12 und des Hilfsschneckenrads 22 konzentrisch sind. Das Hilfsschneckenrad 20 kann über seinen verzahnten Bereich 24 der durch eine mit einer Antriebswelle verbundenen Schnecke 26 dem Schneckenrad 12 aufgeprägten Bewegung lastfrei und damit ohne Verschleiß folgen.According to the exploded view in Figure 1, the safety gear on an output shaft 10, which is only partially shown in Figure 1, arranged. On this Output shaft 10 is seated a worm wheel 12 which is non-rotatably slidable via a Nutfederverbindung 14 to the output shaft. The output shaft additionally has a region 16 which is aligned eccentrically to the axis 18 of the output shaft. On this eccentric portion 16, an auxiliary worm wheel 20 can be pushed with slight play, which has an eccentric bore 22. The eccentricities of the output shaft portion 16 and the bore 22 of the auxiliary worm wheel 20 approximately cancel each other with respect to the output shaft 18, so that the outer diameter of the worm wheel 12 and the auxiliary worm wheel 22 are concentric. The auxiliary worm wheel 20 can follow its toothed region 24 of the force applied to the worm wheel 12 by means of a worm connected to a drive shaft 12 without load and thus without wear.

Kommt es nun durch Verschleiß oder Überlast zum Tragmittelbruch am Schnekkenrad 12, verdreht sich das Hilfsschneckenrad 20 aufgrund der Belastung gegenüber dem Exzenter 16 der Abtriebswelle 10. Diese Verdrehung wird durch das Spiel zwischen der exzentrischen Bohrung 22 und dem exzentrischen Bereich 16 ermöglicht. Aufgrund dieser Verdrehbewegung rückt der Außendurchmesser 26 des Hilfsschneckenrades 20 aus seiner konzentrischen Position heraus und drückt sich gegen einen zylindrischen Bereich 28 (vgl. Figur 4) des Getriebegehäuses.If it now comes by wear or overload to Tragmittelbruch on Schnekkenrad 12, the auxiliary worm wheel 20 rotates due to the load against the eccentric 16 of the output shaft 10. This rotation is made possible by the game between the eccentric bore 22 and the eccentric portion 16. Due to this twisting movement, the outer diameter 26 of the auxiliary worm wheel 20 moves out of its concentric position and presses against a cylindrical region 28 (see FIG. 4) of the gear housing.

Die Exzentrizität des exzentrischen Bereichs 16 der Abtriebswelle 10 und der exzentrischen Bohrung 22 des Hilfsschneckenrades 20 sind so ausgelegt, dass zwischen Hilfsschneckenrad 20 und Getriebegehäuse eine Selbsthemmung eintritt. Die sich aufbauenden radialen Kräfte stützen sich über entsprechend auf der Abtriebswelle 10 aufgebrachte Lager 30 und 32 am Getriebegehäuse ab und verhindern somit ein weiteres Verdrehen der Abtriebswelle 10 gegenüber dem Hilfsschneckenrad 24. Somit wird die Last, die als Drehmoment auf die Antriebswelle 10 wirkt, reibschlüssig abgebremst.The eccentricity of the eccentric portion 16 of the output shaft 10 and the eccentric bore 22 of the auxiliary worm wheel 20 are designed so that a self-locking occurs between auxiliary worm wheel 20 and gear housing. The resulting radial forces are based on correspondingly applied to the output shaft 10 bearings 30 and 32 on the transmission housing and thus prevent further rotation of the output shaft 10 relative to the auxiliary worm wheel 24. Thus, the load acting as torque on the drive shaft 10, frictionally braked.

Claims (3)

Fangvorrichtung für Verschlussvorrichtungen, wie beispielsweise Tore, mit einem mit einer als Wickelwelle dienenden Abtriebswelle drehfest verbundenen Schneckenrad und einer selbsthemmenden Schnecke, die mit einer Antriebswelle in Verbindung steht,
dadurch gekennzeichnet,
dass auf einem exzentrischen Bereich der Abtriebswelle ein Hilfsschneckenrade mit Spiel sitzt, wobei das Hilfsschneckenrad eine betragsgleiche Exzentrizität wie die Abtriebswelle aufweist und derart montiert ist, dass sich die Exzentritäten bezogen auf die Achse der Abtriebswelle aufheben, wobei das Hilfsschneckenrad über seinen verzahnten Bereich lastfrei der Bewegung des Schneckenrades folgen kann.Catching device for closing devices, such as gates, with a worm wheel connected non-rotatably to an output shaft serving as a winding shaft and a self-locking worm, which is connected to a drive shaft,
characterized,
in that an auxiliary worm wheel sits with clearance on an eccentric region of the output shaft, wherein the auxiliary worm wheel has an eccentricity of the same amount as the output shaft and is mounted in such a way that the eccentricities cancel each other with respect to the axis of the output shaft, wherein the auxiliary worm wheel is free of movement over its toothed region can follow the worm wheel. Fangvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich das Hilfsschneckenrad bei Bewegung aus seiner konzentrischen Position heraus gegen einen zylindrischen Bereich des Getriebegehäuses abstützt.Safety gear according to claim 1, characterized in that the auxiliary worm wheel is supported on movement out of its concentric position out against a cylindrical portion of the gear housing. Fangvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass am Hilfsschneckenrad Bereiche vorgesehen sind, die gezielt verformbar sind.Safety gear according to claim 1 or 2, characterized in that the auxiliary worm wheel areas are provided which are selectively deformable.
EP06019562A 2005-11-22 2006-09-19 Fall protection device for a closure Active EP1788187B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202005018238U DE202005018238U1 (en) 2005-11-22 2005-11-22 Safety catch for closing device

Publications (3)

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EP1788187A2 true EP1788187A2 (en) 2007-05-23
EP1788187A3 EP1788187A3 (en) 2008-11-26
EP1788187B1 EP1788187B1 (en) 2009-12-02

Family

ID=37685256

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EP06019562A Active EP1788187B1 (en) 2005-11-22 2006-09-19 Fall protection device for a closure

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US (1) US7669499B2 (en)
EP (1) EP1788187B1 (en)
CN (1) CN1991126B (en)
BR (1) BRPI0604825B1 (en)
DE (2) DE202005018238U1 (en)
ES (1) ES2336591T3 (en)
ZA (1) ZA200609640B (en)

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EP2272395B1 (en) * 2009-07-10 2013-01-02 Albéa Services A cosmetic applicator
CN108626314B (en) * 2018-07-07 2023-09-01 嘉兴易控智能科技有限公司 Tooth breakage safety mechanism for worm gear reducer
US20230193689A1 (en) * 2021-12-20 2023-06-22 Cornellcookson, Llc Operator governor release for fire shutters

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE29812074U1 (en) * 1998-07-07 1998-12-03 MARANTEC Antriebs- und Steuerungstechnik GmbH & Co. Produktions-KG, 33428 Marienfeld Safety gear

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DE3129648C2 (en) * 1981-07-28 1985-05-30 W. u. H. Neukirchen GmbH & Co KG, 4060 Viersen Safety device against unintentional rolling of a roller shutter
DE3223196A1 (en) * 1982-06-22 1983-12-22 Ernst Wagner Kg, 7410 Reutlingen VEHICLE WITH 2 STEERING WHEELS
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DE3433561C1 (en) 1984-09-13 1986-03-20 GfA - Antriebstechnik GmbH, 4000 Düsseldorf Safety gear
US4686863A (en) * 1985-02-08 1987-08-18 Tokico Ltd. Rotary actuator
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CN2146472Y (en) * 1993-01-15 1993-11-17 广东省佛山市商业机械厂 Traction engine for elevators
GB9718574D0 (en) * 1997-09-03 1997-11-05 Lucas Ind Plc Improvements relating to gears

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DE29812074U1 (en) * 1998-07-07 1998-12-03 MARANTEC Antriebs- und Steuerungstechnik GmbH & Co. Produktions-KG, 33428 Marienfeld Safety gear

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Publication number Publication date
ES2336591T3 (en) 2010-04-14
DE202005018238U1 (en) 2007-04-05
ZA200609640B (en) 2008-04-30
US20070143964A1 (en) 2007-06-28
CN1991126A (en) 2007-07-04
US7669499B2 (en) 2010-03-02
EP1788187B1 (en) 2009-12-02
BRPI0604825A (en) 2007-09-04
BRPI0604825B1 (en) 2019-05-07
DE502006005498D1 (en) 2010-01-14
EP1788187A3 (en) 2008-11-26
CN1991126B (en) 2011-12-28

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