EP3415456B1 - Safety buffer for a lift or crane - Google Patents

Safety buffer for a lift or crane Download PDF

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Publication number
EP3415456B1
EP3415456B1 EP18176749.2A EP18176749A EP3415456B1 EP 3415456 B1 EP3415456 B1 EP 3415456B1 EP 18176749 A EP18176749 A EP 18176749A EP 3415456 B1 EP3415456 B1 EP 3415456B1
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EP
European Patent Office
Prior art keywords
buffer
fastening device
safety
safety buffer
fastening
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EP18176749.2A
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German (de)
French (fr)
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EP3415456A1 (en
Inventor
Gerhard Kieffer
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Acla Werke GmbH
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Acla Werke GmbH
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Publication of EP3415456A1 publication Critical patent/EP3415456A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/28—Buffer-stops for cars, cages, or skips
    • B66B5/282—Structure thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C7/00—Runways, tracks or trackways for trolleys or cranes
    • B66C7/16—Devices specially adapted for limiting trolley or crane travel; Arrangements of buffer-stops

Definitions

  • the invention relates to a safety buffer for an elevator or crane according to the preamble of claim 1.
  • Safety buffers for absorbing impacts for use in elevators or in cranes are known from the prior art, which buffers are used, for example, as buffers for an elevator car or for a counterweight of an elevator car.
  • These safety buffers have a volume-compressible elastic buffer element and a fastening device, the fastening device of the safety buffer being formed by a plate which is permanently connected to the buffer element via a fastening surface provided at the first end of the buffer element.
  • the safety buffers are fastened to a load-bearing structure, for example an elevator, by means of the fastening device in such a way that the buffer element protrudes in the direction of an object to be intercepted.
  • the fastening device is fastened at the end facing the structure used for fastening.
  • the safety buffer is fixed to the structure of the elevator by means of one or more screws. The lower end of the fastening device comes to rest on the load-bearing base structure and is connected to it via the fastening means.
  • the permanent connection between the fastening device and the lower fastening surface of the buffer element is realized by means of an adhesive bond or chemical connection.
  • Buffer element according to the prior art is therefore configured laterally with an expansion joint in order to keep the loads acting on the connection between buffer element and fastening device low. Nevertheless, when the safety buffer is loaded, the highest amount of stress occurs in the area of the lateral transition between the plate of the fastening device and the buffer element.
  • the disadvantage of the safety buffers used according to the aforementioned prior art is that the connection between the fastening device and the buffer element already has a high level of strength and security, but during operation of the safety buffer even greater strength of the connection and associated greater security of the connection is desirable is.
  • the end U.S. 5,419,539 a safety buffer according to the preamble of claim 1 is known.
  • the end US 2011/0227264 A1 a safety buffer for absorbing impulses with two buffer elements, which each have different moduli of elasticity, is known.
  • the end KR 101 403 650 B1 discloses a buffer element with an axial bore and a stabilization element accommodated therein, wherein the buffer element can be connected to a foundation or a component to be buffered by means of the axial bore.
  • the invention is therefore based on the object of creating a safety buffer of the type described at the outset, which has greater security or connection strength between the fastening device and the elastic buffer element.
  • the fastening device has at least one embedding element, the at least one embedding element protruding at least partially from the fastening device in the direction of the buffer element and being embedded in the buffer element.
  • the aforementioned embodiment has the advantage that the additional embedding elements of the fastening device further increase the strength of the connection between the buffer element and the fastening device, so that the aforementioned safety buffer has greater security.
  • the at least partial embedding of the embedding elements means that they are at least partially surrounded by the buffer element. This can further increase the stability of the connection between the buffer element and the fastening device due to the form fit.
  • the additional design of the embedding elements also has the advantage that the Available mounting surface can be further increased and thus also the strength of the connection can be increased.
  • the buffer element is foamed onto the fastening device, with the at least one embedding element being foamed around by the buffer element.
  • the aforementioned configuration has the advantage that the safety buffer can be connected to the fastening device and the embedding elements during the manufacturing process.
  • foaming the buffer element directly onto the fastening device and foaming the embedding element By foaming the buffer element directly onto the fastening device and foaming the embedding element, a direct connection between the buffer element and the fastening device is realized.
  • the production process is improved in that direct foaming or foaming around the fastening device with the embedding element means that no impurities or solids can settle on the surface of the fastening device in such a way that a connection could be impaired.
  • the plate of the fastening device can in particular be circular with a constant radius.
  • the fastening device can furthermore have at least one recess for the passage of a fastening means.
  • the at least one recess can preferably be arranged centrally on the fastening device.
  • the buffer element can preferably be formed from a foamed plastic.
  • the buffer element consists of a foamed polyurethane (PUR) plastic.
  • the buffer body can preferably be configured cylindrically, particularly preferably circularly cylindrically.
  • the circular-cylindrical shape makes it possible to provide the largest possible buffer volume for the buffer element with small dimensions of the safety buffer.
  • the buffer can preferably be designed as a hollow cylinder with a through hole.
  • the through hole of the buffer body can preferably be arranged concentrically with a central bore or recess of the fastening device.
  • the entire lower bearing surface of the fastening device is preferably exposed and accordingly not covered by the material of the buffer element.
  • a completely exposed lower bearing surface of the fastening device has the advantage that when the buffer element is attached to the structure of an elevator or crane, a direct load transfer can take place between the fastening device of the safety buffer and the structure of the elevator or crane.
  • the fastening device is preferably formed from a material that is not compressible or only very slightly compressible, so it can be ensured that when the safety buffer is fastened via a screw connection, this cannot become loose or loosen over time. In particular, it is avoided that the volume-compressible material of the buffer element is present in the area between the bearing surface of the fastening device and the structure of the elevator or crane.
  • the fastening device can have at least one wing-shaped embedding element projecting obliquely from the plate.
  • the wing-shaped configuration has the advantage that the embedding element can be almost completely embedded and that the strength of the connection between the fastening device and the embedding element is additionally increased by the positive fit of the buffer element around the embedding element.
  • the at least one embedding element can particularly preferably protrude at an acute angle to the plate of the fastening element. By forming an acute angle, the connection between the fastening device and the buffer element has increased strength in the direction of the fastening due to the form fit between the buffer element and the embedding element.
  • the fastening device is made from a metal, particularly preferably from a steel or a steel alloy.
  • a metallic material in particular a steel or a steel alloy, is particularly advantageous since the aforementioned materials have high ductility and high strength at the same time, so that brittle material failure of the fastening device under load can be prevented.
  • the fastening device can also be produced from a plastic, in particular also from a fiber-reinforced plastic.
  • the embedding element of the fastening device can be designed in the shape of a plate.
  • the plate-shaped design of the embedding element is characterized in that the embedding element can be formed, for example, from a flat sheet metal with a constant material thickness, the sheet metal having a depression in its center and the edges of the sheet metal being at least partially arched or bent upwards.
  • the aforementioned configuration of the embedding element has the advantage that it can be manufactured easily and inexpensively by machine using stamping and/or embossing processes.
  • the plate-shaped element has a central recess, such as a central bore.
  • the plate-shaped embedding element can have a circular shape.
  • the material thickness can vary in different areas of the embedding element.
  • the embedding element can be adapted to the loads that occur, so the material thickness can be increased in highly stressed areas and reduced in low or non-stressed areas, or holes or recesses can also be provided in non-stressed areas.
  • the weight as well as the amount of material used of the embedding element can be reduced by the recess.
  • the recesses have the further advantage that they can also be filled with the material of the buffer element, with the result that at least parts of the embedding element are completely surrounded and are by the material of the buffer element. This complete embedding improves the form fit and thus the strength of the connection between the buffer element and the fastening device.
  • the recesses can preferably be designed as round bores.
  • the embedding element can have a plurality of recesses in addition to a central recess or bore, with the additional recess being formed at a distance from the central bore.
  • the fastening device can be produced as a cast part with possible recesses.
  • the additional recesses of the embedding element are arranged on a circular path in the outer area of the round embedding element.
  • the configuration in the outer area of the embedding element has the advantage that a positive fit can be achieved between the embedding element and the buffer element in the area which is embedded furthest into the buffer element. This increases the strength of the connection between the fastening device and the buffer element, particularly in the edge area.
  • the fastening device and the embedding element can be designed as at least two separate components. This has the advantage of simplified production of the individual elements while at the same time realizing a high variety of shapes of the two individual elements.
  • the at least one embedding element can have a first bearing surface, with the first bearing surface resting at least partially on a connecting surface of the fastening device.
  • the provision of a first bearing surface allows good load transfer between the insert and the plate of the fixture.
  • the at least one embedding element and the fastening device can be integrally connected or formed in one piece.
  • the material connection can be produced by soldering, welding, gluing or by a vulcanization process. In a first step, this configuration enables the individual parts to be manufactured inexpensively and, in a second step, to be able to be assembled to form a resulting more complex overall geometry.
  • the embedding element can be connected to the fastening device by means of fastening means adapted to one another; in particular, parts of a screw connection can be formed on the fastening device and the embedding element.
  • fasteners for the connection, heat input during the connection of the two individual parts can be prevented, so that there can be no structural changes or weakening in the area of the connection between the embedding element and the plate of the fastening device.
  • this can be designed as a cast or stamped part, it being possible for at least the embedding elements to be stamped out of the body of the fastening device in the case of a stamped part.
  • the fastening device and/or the embedding element can have a surface which is compatible with the material of the buffer element in order to form a chemical bond between the fastening device and the buffer element.
  • the formation of a chemical bond between the surface of the fastening element and the material of the buffer element has the advantage that such a bond can absorb higher forces and loads before the connection between the fastening device and the buffer element separates.
  • the compatible surface can have adhesion-promoting properties, in particular it can increase the adhesive forces between the fastening device and the buffer element.
  • Such a chemical bond is formed by foaming or foaming around the fastening device and/or the embedding element with the material of the buffer element.
  • the compatible surface can be produced, for example, by roughening the surface or painting or coating the surface.
  • the buffer element can have at least one at least partially circumferential expansion joint on the side surface.
  • the expansion joint has the advantage that this possible excessive stress can be avoided when the safety buffer is loaded.
  • the aforementioned expansion joints are provided in the region of the upper end of the fastening device in order to prevent excessive stress there at the transition surface between the fastening device and the buffer element.
  • the fastening device can furthermore have a peripheral side edge which is at least partially covered by a buffer element.
  • the aforementioned embodiment has the advantage that due to the covering of the side edge of the fastening device, the fastening device is no longer directly exposed to external influences, such as corrosion or, for example, liquids occurring during operation.
  • the Figs. 1 and FIGS. 2a to 2c show different views of a first exemplary embodiment of a safety buffer 1 for use in an elevator or crane.
  • the safety buffer has an elastic buffer element 2, which has been cut in the middle in the illustration to improve understanding of the structure.
  • the safety buffer 1 also has a fastening device with a plate 41, the fastening device 4 being permanently connected to a fastening surface 23 of the buffer element.
  • the fastening device has a plate-shaped embedding element 49 which partially protrudes from the fastening device 4 in the direction of the buffer element 2 and is embedded in the buffer element 2 or partially surrounded by it.
  • the body of the buffer element 2 is designed as a circular hollow cylinder with a central through hole, the fastening device 4 and the embedding element 49 having a central recess for fastening 47 in the form of a bore.
  • a fastening means for example a screw, can be passed through the central through-hole and through the recess 47, so that the head of the fastening means comes to rest on the top side of the fastening device 4, and in particular on the top side of the embedding element 49.
  • the fastening means can be connected, for example, to a thread on an existing structure of an elevator or crane.
  • the embedding element 49 is plate-shaped, with the actual body of the embedding element 49 being made from flat sheet metal with a constant material thickness, which has a depression in the middle to form a first bearing surface 494.
  • the outer edges of the embedding element 49 are bent or arched upwards.
  • the plate-shaped embedding element 49 has a central fastening bore 47 and a large number of recesses 492 spaced therefrom.
  • the multiple recesses 492 are formed in the section of the embedding element 49 that is curved upwards. These recesses 492 allow the material of the buffer element 2 to flow around or foam around the embedding element 49.
  • the fastening device 4 is designed as two separate components 6 , 8 , the plate-shaped embedding element 49 being designed as component 8 and the plate 41 of the fastening device 4 as component 6 .
  • the at least one embedding element 49 has a first support surface 494, which is at least partially on a Connecting surface 43 rests on the fastening device.
  • the separate components 6.8 are materially connected, in particular soldered or welded to one another.
  • the buffer element 2 is foamed onto the fastening device 4, with the embedding element 49 being at least partially surrounded by foam from the buffer element 2 and thus being embedded in it.
  • the plate 41 of the fastening device has a peripheral side surface 412 which is at least partially covered by the buffer element 2 .
  • FIG 3 shows a second embodiment of a safety buffer 1, in which, unlike in the first embodiment, the plate-shaped fastening element is not circular-cylindrical, but square in the illustrated embodiment, and the plate 41 is designed larger than the fastening surface 23 of the buffer element, such that the plate Buffer element surpasses the circumference.
  • the plate 41 of the fastening device 4 has a large number of recesses 47, via which the safety buffer 1 can be arranged on an existing structure of an elevator or crane or can be fastened to it.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Description

Die Erfindung betrifft einen Sicherheitspuffer für einen Aufzug oder Kran nach dem Oberbegriff des Anspruchs 1.The invention relates to a safety buffer for an elevator or crane according to the preamble of claim 1.

Aus dem Stand der Technik sind Sicherheitspuffer zum Abfangen von Stößen für die Nutzung in Aufzügen oder in Kränen bekannt, welche beispielsweise als Puffer für eine Aufzugskabine bzw. für ein Gegengewicht einer Aufzugskabine genutzt werden. Diese Sicherheitspuffer weisen ein volumenkompressibles elastisches Pufferelement sowie eine Befestigungsvorrichtung auf, wobei die Befestigungsvorrichtung des Sicherheitspuffers durch eine Platte gebildet ist, welche über eine am ersten Ende des Pufferelements vorgesehene Befestigungsfläche dauerhaft mit dem Pufferelement verbunden ist.Safety buffers for absorbing impacts for use in elevators or in cranes are known from the prior art, which buffers are used, for example, as buffers for an elevator car or for a counterweight of an elevator car. These safety buffers have a volume-compressible elastic buffer element and a fastening device, the fastening device of the safety buffer being formed by a plate which is permanently connected to the buffer element via a fastening surface provided at the first end of the buffer element.

Die Sicherheitspuffer werden mittels der Befestigungsvorrichtung an einer lasttragenden Struktur beispielsweise eines Aufzugs befestigt, derart, dass das Pufferelement in Richtung eines abzufangenden Gegenstandes absteht. Die Befestigungsvorrichtung ist dabei an dem der zur Befestigung genutzten Struktur zugewandten Ende befestigt. Der Sicherheitspuffer wird mittels einer oder mehrerer Schrauben, an der Struktur des Aufzugs befestigt. Dabei kommt das untere Ende der Befestigungsvorrichtung zur Auflage auf der lasttragenden Grundstruktur und wird an dieser über das Befestigungsmittel verbunden.The safety buffers are fastened to a load-bearing structure, for example an elevator, by means of the fastening device in such a way that the buffer element protrudes in the direction of an object to be intercepted. The fastening device is fastened at the end facing the structure used for fastening. The safety buffer is fixed to the structure of the elevator by means of one or more screws. The lower end of the fastening device comes to rest on the load-bearing base structure and is connected to it via the fastening means.

Die dauerhafte Verbindung zwischen der Befestigungsvorrichtung und der unteren Befestigungsfläche des Pufferelements ist bei den vorbekannten Sicherheitspuffern über eine Klebung bzw. chemische Verbindung verwirklicht.In the case of the previously known safety buffers, the permanent connection between the fastening device and the lower fastening surface of the buffer element is realized by means of an adhesive bond or chemical connection.

Aufgrund der hohen auftretenden Lasten bei der Nutzung des Sicherheitspuffers kann es zu einer Ablösung bzw. Abscherung der Befestigungsvorrichtung von dem Pufferelement kommen. Bei dem Pufferelement gemäß dem Stand der Technik ist daher seitlich eine Dehnfuge ausgestaltet, um die auf die Verbindung zwischen Pufferelement und Befestigungsvorrichtung wirkenden Lasten gering zu halten. Dennoch treten unter Belastung des Sicherheitspuffers die betragsmäßig höchsten Spannungen im Bereich des seitlichen Übergangs zwischen der Platte der Befestigungsvorrichtung und dem Pufferelement auf.Due to the high loads occurring when using the safety buffer, the fastening device may become detached or shear off from the buffer element. In which Buffer element according to the prior art is therefore configured laterally with an expansion joint in order to keep the loads acting on the connection between buffer element and fastening device low. Nevertheless, when the safety buffer is loaded, the highest amount of stress occurs in the area of the lateral transition between the plate of the fastening device and the buffer element.

Nachtteilig an den verwendeten Sicherheitspuffern gemäß dem vorgenannten Stand der Technik ist, dass die Verbindung zwischen der Befestigungsvorrichtung und dem Pufferelement zwar bereits eine hohe Festigkeit und Sicherheit aufweist, jedoch im Betrieb des Sicherheitspuffers noch höhere Festigkeiten der Verbindung und damit einhergehend eine höhere Sicherheit der Verbindung wünschenswert ist.The disadvantage of the safety buffers used according to the aforementioned prior art is that the connection between the fastening device and the buffer element already has a high level of strength and security, but during operation of the safety buffer even greater strength of the connection and associated greater security of the connection is desirable is.

Aus US 5,419,539 ist ein Sicherheitspuffer nach dem Oberbegriff des Anspruchs 1 bekannt. Aus US 2011/0227264 A1 ist ein Sicherheitspuffer zur Absorbierung von Impulsen mit zwei Pufferelementen, die jeweils voneinander verschiedene E-Module aufweisen, bekannt. Aus KR 101 403 650 B1 ist ein Pufferelement mit einer axialen Bohrung und einem darin aufgenommenen Stabilisationselement offenbart, wobei das Pufferelement mittels der axialen Bohrung mit einem Fundament oder einem zu puffernden Bauteil verbindbar ist.the end U.S. 5,419,539 a safety buffer according to the preamble of claim 1 is known. the end US 2011/0227264 A1 a safety buffer for absorbing impulses with two buffer elements, which each have different moduli of elasticity, is known. the end KR 101 403 650 B1 discloses a buffer element with an axial bore and a stabilization element accommodated therein, wherein the buffer element can be connected to a foundation or a component to be buffered by means of the axial bore.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Sicherheitspuffer der eingangs beschriebenen Art zu schaffen, welcher über eine höhere Sicherheit bzw. Verbindungsfestigkeit zwischen der Befestigungseinrichtung und dem elastischen Pufferelement verfügt.The invention is therefore based on the object of creating a safety buffer of the type described at the outset, which has greater security or connection strength between the fastening device and the elastic buffer element.

Zur Lösung der Aufgabe dienen die Merkmale des Anspruchs 1.The features of claim 1 serve to solve the problem.

Die Erfindung sieht in vorteilhafter Weise vor, dass die Befestigungsvorrichtung mindestens ein Einbettelement aufweist, wobei das mindestens eine Einbettelement von der Befestigungsvorrichtung in Richtung des Pufferelements zumindest teilweise absteht und in dem Pufferelement eingebettet ist. Die vorgenannte Ausführungsform weist dabei den Vorteil auf, dass die zusätzlichen Einbettelemente der Befestigungsvorrichtung die Festigkeit der Verbindung zwischen dem Pufferelement und der Befestigungsvorrichtung weiter erhöhen, so dass der vorgenannte Sicherheitspuffer über eine höhere Sicherheit verfügt. Durch die zumindest teilweise Einbettung der Einbettelemente werden diese zumindest teilweise von dem Pufferelement umschlossen, hierdurch kann aufgrund des Formschlusses weiterhin die Stabilität der Verbindung zwischen dem Pufferelement und der Befestigungsvorrichtung erhöht werden. Die zusätzliche Ausbildung der Einbettelemente weist weiterhin den Vorteil auf, dass die zur Verfügung stehende Befestigungsfläche weiter vergrößert werden kann und damit ebenfalls die Festigkeit der Verbindung erhöht werden kann.The invention advantageously provides that the fastening device has at least one embedding element, the at least one embedding element protruding at least partially from the fastening device in the direction of the buffer element and being embedded in the buffer element. The aforementioned embodiment has the advantage that the additional embedding elements of the fastening device further increase the strength of the connection between the buffer element and the fastening device, so that the aforementioned safety buffer has greater security. The at least partial embedding of the embedding elements means that they are at least partially surrounded by the buffer element. This can further increase the stability of the connection between the buffer element and the fastening device due to the form fit. The additional design of the embedding elements also has the advantage that the Available mounting surface can be further increased and thus also the strength of the connection can be increased.

In einer bevorzugten Ausführungsform ist das Pufferelement an die Befestigungsvorrichtung angeschäumt, wobei das mindestens eine Einbettelement von dem Pufferelement umschäumt ist.In a preferred embodiment, the buffer element is foamed onto the fastening device, with the at least one embedding element being foamed around by the buffer element.

Die vorgenannte Ausgestaltung weist dabei den Vorteil auf, dass der Sicherheitspuffer mit der Befestigungsvorrichtung und den Einbettelementen während des Herstellungsprozesses verbunden werden kann. Durch das direkte Anschäumen des Pufferelements an die Befestigungsvorrichtung und das Umschäumen des Einbettelements wird eine direkte Anbindung zwischen dem Pufferelement und der Befestigungsvorrichtung realisiert. Weiterhin wird der Herstellungsvorgang dahingehend verbessert, dass durch das direkte Anschäumen bzw. Umschäumen der Befestigungsvorrichtung mit dem Einbettelement sich keine Verunreinigungen oder Feststoffe auf der Oberfläche der Befestigungsvorrichtung absetzen können, derart, dass eine Anbindung verschlechtert werden könnte.The aforementioned configuration has the advantage that the safety buffer can be connected to the fastening device and the embedding elements during the manufacturing process. By foaming the buffer element directly onto the fastening device and foaming the embedding element, a direct connection between the buffer element and the fastening device is realized. Furthermore, the production process is improved in that direct foaming or foaming around the fastening device with the embedding element means that no impurities or solids can settle on the surface of the fastening device in such a way that a connection could be impaired.

Die Platte der Befestigungsvorrichtung kann insbesondere kreisförmig mit einem konstanten Radius ausgebildet sein.The plate of the fastening device can in particular be circular with a constant radius.

Die Befestigungsvorrichtung kann weiterhin mindestens eine Aussparung zur Durchführung eines Befestigungsmittels aufweisen.The fastening device can furthermore have at least one recess for the passage of a fastening means.

Die mindestens eine Aussparung kann vorzugsweise zentral bzw. mittig an der Befestigungsvorrichtung angeordnet sein.The at least one recess can preferably be arranged centrally on the fastening device.

Das Pufferelement kann vorzugsweise aus einem geschäumten Kunststoff gebildet werden.The buffer element can preferably be formed from a foamed plastic.

In einer besonders bevorzugten Ausführungsform besteht das Pufferelement aus einem geschäumten Polyurethan (PUR)-Kunststoff.In a particularly preferred embodiment, the buffer element consists of a foamed polyurethane (PUR) plastic.

Der Pufferkörper kann vorzugsweise zylindrisch, besonders bevorzugt kreiszylindrisch, ausgestaltet sein. Die kreiszylindrische Form ermöglicht bei geringen Abmessungen des Sicherheitspuffers dennoch ein möglichst großes Puffervolumen für das Pufferelement bereitzustellen.The buffer body can preferably be configured cylindrically, particularly preferably circularly cylindrically. The circular-cylindrical shape makes it possible to provide the largest possible buffer volume for the buffer element with small dimensions of the safety buffer.

In einer weiteren vorteilhaften Ausführungsform kann der Puffer vorzugsweise als Hohlzylinder mit einem Durchgangsloch ausgestaltet werden.In a further advantageous embodiment, the buffer can preferably be designed as a hollow cylinder with a through hole.

Das Durchgangsloch des Pufferkörpers kann bevorzugt konzentrisch mit einer Zentralbohrung bzw. Aussparung der Befestigungsvorrichtung angeordnet sein.The through hole of the buffer body can preferably be arranged concentrically with a central bore or recess of the fastening device.

Die gesamte untere Auflagefläche der Befestigungsvorrichtung liegt vorzugsweise frei und ist entsprechend nicht von dem Material des Pufferelements bedeckt. Eine komplett freiliegende untere Auflagefläche der Befestigungsvorrichtung weist den Vorteil auf, dass bei Anbringung des Pufferelements an der Struktur eines Aufzugs oder Krans eine direkte Lastübertragung zwischen der Befestigungsvorrichtung des Sicherheitspuffers und der Struktur des Aufzugs oder Krans stattfinden kann. Die Befestigungsvorrichtung ist bevorzugt aus einem nicht oder nur sehr gering kompressiblen Material gebildet, so kann sichergestellt werden, dass bei Befestigung des Sicherheitspuffers über eine Schraubverbindung diese sich nicht im Laufe der Zeit lockern bzw. lösen kann. Insbesondere wird vermieden, dass das volumenkompressible Material des Pufferelements in dem Bereich zwischen der Auflagefläche der Befestigungsvorrichtung und der Struktur des Aufzugs oder Krans vorliegt.The entire lower bearing surface of the fastening device is preferably exposed and accordingly not covered by the material of the buffer element. A completely exposed lower bearing surface of the fastening device has the advantage that when the buffer element is attached to the structure of an elevator or crane, a direct load transfer can take place between the fastening device of the safety buffer and the structure of the elevator or crane. The fastening device is preferably formed from a material that is not compressible or only very slightly compressible, so it can be ensured that when the safety buffer is fastened via a screw connection, this cannot become loose or loosen over time. In particular, it is avoided that the volume-compressible material of the buffer element is present in the area between the bearing surface of the fastening device and the structure of the elevator or crane.

Die Befestigungsvorrichtung kann mindestens ein von der Platte schräg abstehendes flügelförmiges Einbettelement aufweisen. Die flügelförmige Ausgestaltung weist den Vorteil auf, dass eine annähernd vollständige Einbettung des Einbettelements realisiert werden kann und das weiterhin die Festigkeit der Verbindung zwischen der Befestigungsvorrichtung und dem Einbettelement durch den Formschluss des Pufferelements um das Einbettelement zusätzlich erhöht wird.The fastening device can have at least one wing-shaped embedding element projecting obliquely from the plate. The wing-shaped configuration has the advantage that the embedding element can be almost completely embedded and that the strength of the connection between the fastening device and the embedding element is additionally increased by the positive fit of the buffer element around the embedding element.

Das mindestens eine Einbettelement kann dabei besonders bevorzugt in einem spitzen Winkel zu der Platte des Befestigungselements abstehen. Durch die Bildung eines spitzen Winkels weist die Verbindung zwischen der Befestigungsvorrichtung und dem Pufferelement in Richtung der Befestigung eine erhöhte Festigkeit aufgrund des Formschlusses zwischen dem Pufferelement und dem Einbettelement auf.The at least one embedding element can particularly preferably protrude at an acute angle to the plate of the fastening element. By forming an acute angle, the connection between the fastening device and the buffer element has increased strength in the direction of the fastening due to the form fit between the buffer element and the embedding element.

In einer weiteren bevorzugten Ausführungsform ist die Befestigungsvorrichtung aus einem Metall, besonders bevorzugt aus einem Stahl oder einer Stahllegierung, hergestellt. Die Nutzung eines metallischen Werkstoffes, insbesondere eines Stahls oder einer Stahllegierung, ist dabei besonders vorteilhaft, da die vorgenannten Materialien eine hohe Duktilität bei gleichzeitig einer hohen Festigkeit aufweisen, so dass ein sprödes Materialversagen der Befestigungsvorrichtung unter Last verhindert werden kann. Die Befestigungsvorrichtung kann in einer alternativen Ausführungsform auch aus einem Kunststoff, insbesondere auch aus einem faserverstärkten Kunststoff, hergestellt werden.In a further preferred embodiment, the fastening device is made from a metal, particularly preferably from a steel or a steel alloy. The use of a metallic material, in particular a steel or a steel alloy, is particularly advantageous since the aforementioned materials have high ductility and high strength at the same time, so that brittle material failure of the fastening device under load can be prevented. In an alternative embodiment, the fastening device can also be produced from a plastic, in particular also from a fiber-reinforced plastic.

Das Einbettelement der Befestigungsvorrichtung kann in einer bevorzugten Ausführungsform tellerförmig ausgestaltet werden. Die tellerförmige Ausgestaltung des Einbettelements ist dadurch gekennzeichnet, dass das Einbettelement beispielsweise aus einem flachen Blech mit einer gleichbleibenden Materialdicke gebildet werden kann, wobei das Blech in dessen Mitte eine Vertiefung aufweist und die Kanten des Bleches zumindest teilweise nach oben gewölbt bzw. gebogen werden. Die vorgenannte Ausgestaltung des Einbettelements weist den Vorteil auf, dass dieses einfach und kostengünstig unter Nutzung von Stanz- und/oder Prägeverfahren maschinell hergestellt werden kann.In a preferred embodiment, the embedding element of the fastening device can be designed in the shape of a plate. The plate-shaped design of the embedding element is characterized in that the embedding element can be formed, for example, from a flat sheet metal with a constant material thickness, the sheet metal having a depression in its center and the edges of the sheet metal being at least partially arched or bent upwards. The aforementioned configuration of the embedding element has the advantage that it can be manufactured easily and inexpensively by machine using stamping and/or embossing processes.

In einer bevorzugten Ausführungsform weist das tellerförmige Element eine mittige Aussparung, wie beispielsweise eine Zentralbohrung, auf. Weiterhin kann das tellerförmige Einbettelement eine Kreisform aufweisen.In a preferred embodiment, the plate-shaped element has a central recess, such as a central bore. Furthermore, the plate-shaped embedding element can have a circular shape.

Die Materialdicke kann in unterschiedlichen Bereichen des Einbettelements variieren. Durch die Vorsehung unterschiedlicher Materialdicken kann das Einbettelement an die auftretenden Lasten angepasst werden, so kann in hochbelasteten Bereichen die Materialdicke erhöht und in gering oder nicht belasteten Bereichen die Materialdicke verringert bzw. in nicht belasteten Bereichen auch Löcher oder Aussparungen vorgesehen werden.The material thickness can vary in different areas of the embedding element. By providing different material thicknesses, the embedding element can be adapted to the loads that occur, so the material thickness can be increased in highly stressed areas and reduced in low or non-stressed areas, or holes or recesses can also be provided in non-stressed areas.

Es kann vorgesehen sein, dass das mindestens eine Einbettelement in dem von der Platte abstehenden Teil mindestens eine Aussparung aufweist. Durch die Aussparung kann das Gewicht, als auch die verwendete Materialmenge des Einbettelements reduziert werden. Die Aussparungen haben dabei den weiteren Vorteil, dass diese ebenfalls mit dem Material des Pufferelements ausgefüllt werden können, womit zumindest Teile des Einbettelements vollumfänglich von dem Material des Pufferelements umgeben und sind. Diese vollständige Einbettung verbessert den Formschluss und somit die Festigkeit der Verbindung zwischen dem Pufferelement und die Befestigungsvorrichtung.Provision can be made for the at least one embedding element to have at least one recess in the part protruding from the plate. The weight as well as the amount of material used of the embedding element can be reduced by the recess. The recesses have the further advantage that they can also be filled with the material of the buffer element, with the result that at least parts of the embedding element are completely surrounded and are by the material of the buffer element. This complete embedding improves the form fit and thus the strength of the connection between the buffer element and the fastening device.

Die Aussparungen können vorzugsweise als runde Bohrungen ausgebildet werden. In einer bevorzugten Ausführungsform kann das Einbettelement mehrere Aussparungen zusätzlich zu einer zentralen Aussparung bzw. Bohrung aufweisen, wobei die zusätzliche Aussparung mit Abstand von der Zentralbohrung ausgeführt wird. In einer alternativen Ausführungsform kann die Befestigungsvorrichtung als Gussteil mit eventuellen Aussparungen hergestellt sein.The recesses can preferably be designed as round bores. In a preferred embodiment, the embedding element can have a plurality of recesses in addition to a central recess or bore, with the additional recess being formed at a distance from the central bore. In an alternative embodiment, the fastening device can be produced as a cast part with possible recesses.

In einer weiteren bevorzugten Ausführungsform sind die zusätzlichen Aussparungen des Einbettelements auf einer Kreisbahn im äußeren Bereich des runden Einbettelements angeordnet. Die Ausgestaltung im äußeren Bereich des Einbettelements weist dabei den Vorteil auf, dass ein Formschluss zwischen dem Einbettelement und dem Pufferelement in dem Bereich erzielt werden kann, welcher am weitesten in das Pufferelement eingebettet ist. Hierdurch wird die Festigkeit der Verbindung zwischen der Befestigungsvorrichtung und Pufferelement insbesondere auch im Randbereich erhöht.In a further preferred embodiment, the additional recesses of the embedding element are arranged on a circular path in the outer area of the round embedding element. The configuration in the outer area of the embedding element has the advantage that a positive fit can be achieved between the embedding element and the buffer element in the area which is embedded furthest into the buffer element. This increases the strength of the connection between the fastening device and the buffer element, particularly in the edge area.

Die Befestigungsvorrichtung und das Einbettelement können als mindestens zwei separate Bauteile ausgeführt werden. Dies weist den Vorteil einer vereinfachten Fertigung der Einzelelemente bei gleichzeitiger Realisierung einer hohen Formenvielfalt der beiden Einzelelemente auf.The fastening device and the embedding element can be designed as at least two separate components. This has the advantage of simplified production of the individual elements while at the same time realizing a high variety of shapes of the two individual elements.

In einer besonders bevorzugten Ausführungsform kann das mindestens eine Einbettelement eine erste Auflagefläche aufweisen, wobei die erste Auflagefläche zumindest teilweise auf einer Verbindungsfläche der Befestigungsvorrichtung aufliegt. Die Vorsehung einer ersten Auflagefläche ermöglicht eine gute Lastübertragung zwischen dem Einbettelement und der Platte der Befestigungsvorrichtung.In a particularly preferred embodiment, the at least one embedding element can have a first bearing surface, with the first bearing surface resting at least partially on a connecting surface of the fastening device. The provision of a first bearing surface allows good load transfer between the insert and the plate of the fixture.

Das mindestens eine Einbettelement und die Befestigungsvorrichtung können stoffschlüssig verbunden oder einteilig ausgebildet sein. Dabei kann die stoffschlüssige Verbindung mittels Löten, Schweißen, Kleben oder durch einen Vulkanisierungsvorgang hergestellt werden. Diese Ausgestaltung ermöglicht in einem ersten Schritt die Einzelteile kostengünstig zu fertigen und einem zweiten Schritt zu einer resultierenden komplexeren Gesamtgeometrie zusammensetzen zu können.The at least one embedding element and the fastening device can be integrally connected or formed in one piece. The material connection can be produced by soldering, welding, gluing or by a vulcanization process. In a first step, this configuration enables the individual parts to be manufactured inexpensively and, in a second step, to be able to be assembled to form a resulting more complex overall geometry.

Alternativ kann das Einbettelement mit der Befestigungsvorrichtung mittels aneinander angepasster Befestigungsmittel verbunden werden, insbesondere können an der Befestigungsvorrichtung und dem Einbettelement Teile einer Schraubverbindung ausgebildet werden. Durch die Nutzung von Befestigungsmitteln zur Verbindung kann ein Wärmeeintrag bei der Verbindung der beiden Einzelteile verhindert werden, so dass es zu keinen Gefügeänderungen oder Schwächungen im Bereich der Verbindung zwischen Einbettelement und Platte der Befestigungsvorrichtung kommen kann.Alternatively, the embedding element can be connected to the fastening device by means of fastening means adapted to one another; in particular, parts of a screw connection can be formed on the fastening device and the embedding element. By using fasteners for the connection, heat input during the connection of the two individual parts can be prevented, so that there can be no structural changes or weakening in the area of the connection between the embedding element and the plate of the fastening device.

Bei einer einteiligen Ausführungsform des Einbettelements mit der Befestigungsvorrichtung kann dieses als Guss- oder Stanzteil ausgeführt werden, wobei bei einem Stanzteil zumindest die Einbettelemente aus dem Körper der Befestigungsvorrichtung ausgestanzt werden können.In a one-piece embodiment of the embedding element with the fastening device, this can be designed as a cast or stamped part, it being possible for at least the embedding elements to be stamped out of the body of the fastening device in the case of a stamped part.

Die Befestigungsvorrichtung und/oder das Einbettelement kann über eine zu dem Material des Pufferelements kompatible Oberfläche zur Ausbildung einer chemischen Bindung zwischen der Befestigungsvorrichtung und dem Pufferelement aufweisen. Die Ausbildung einer chemischen Verbindung zwischen der Oberfläche des Befestigungselements und dem Material des Pufferelements weist dabei den Vorteil auf, dass eine derartige Verbindung höhere Kräfte und Belastungen aufnehmen kann, bevor sich die Verbindung zwischen der Befestigungsvorrichtung und dem Pufferelement trennt. Die kompatible Oberfläche kann dabei über haftvermittelnde Eigenschaften verfügen, insbesondere kann diese die Adhäsionskräfte zwischen der Befestigungsvorrichtung und dem Pufferelement erhöhen. Eine derartige chemische Verbindung ist durch das Anschäumen bzw. Umschäumen der Befestigungsvorrichtung und/oder des Einbettelements mit dem Material des Pufferelements gebildet.The fastening device and/or the embedding element can have a surface which is compatible with the material of the buffer element in order to form a chemical bond between the fastening device and the buffer element. The formation of a chemical bond between the surface of the fastening element and the material of the buffer element has the advantage that such a bond can absorb higher forces and loads before the connection between the fastening device and the buffer element separates. The compatible surface can have adhesion-promoting properties, in particular it can increase the adhesive forces between the fastening device and the buffer element. Such a chemical bond is formed by foaming or foaming around the fastening device and/or the embedding element with the material of the buffer element.

Die kompatible Oberfläche kann dabei beispielsweise durch eine Aufrauhung der Oberfläche bzw. eine Lackierung oder Beschichtung der Oberfläche erzeugt werden.The compatible surface can be produced, for example, by roughening the surface or painting or coating the surface.

Das Pufferelement kann an der Seitenfläche mindestens eine zumindest teilweise umlaufende Dehnfuge aufweisen. Die Dehnfuge weist dabei den Vorteil auf, dass diese möglichen Spannungsüberhöhungen bei einer Belastung des Sicherheitspuffers vermeiden kann.The buffer element can have at least one at least partially circumferential expansion joint on the side surface. The expansion joint has the advantage that this possible excessive stress can be avoided when the safety buffer is loaded.

Besonders bevorzugt kann es hierzu vorgesehen sein, dass die vorgenannten Dehnfugen im Bereich des oberen Endes der Befestigungsvorrichtung vorgesehen werden, um dort eine Spannungsüberhöhung an der Übergangsfläche zwischen der Befestigungsvorrichtung und dem Pufferelement zu verhindern.Particularly preferably, it can be provided that the aforementioned expansion joints are provided in the region of the upper end of the fastening device in order to prevent excessive stress there at the transition surface between the fastening device and the buffer element.

Die Befestigungsvorrichtung kann weiterhin eine umlaufende Seitenkante aufweisen, welche zumindest teilweise von einem Pufferelement bedeckt ist.The fastening device can furthermore have a peripheral side edge which is at least partially covered by a buffer element.

Die vorgenannte Ausführungsform weist dabei den Vorteil auf, dass aufgrund der Abdeckung der Seitenkante der Befestigungsvorrichtung die Befestigungsvorrichtung nicht mehr unmittelbar äußeren Einflüssen, wie beispielsweise Korrosion oder beispielsweise während des Betriebs auftretender Flüssigkeiten, ausgesetzt ist.The aforementioned embodiment has the advantage that due to the covering of the side edge of the fastening device, the fastening device is no longer directly exposed to external influences, such as corrosion or, for example, liquids occurring during operation.

Es zeigen:

Fig. 1
eine perspektivische Ansicht eines ersten Ausführungsbeispiels eines Sicherheitspuffers für einen Aufzug oder Kran mit einem Anschnitt des Pufferelements,
Fig. 2a
die Aufsicht auf das erste Ausführungsbeispiel des Sicherheitspuffers,
Fig. 2b
die Seitenansicht des ersten Ausführungsbeispiels des Sicherheitspuffers mit einer teilweisen Schnittdarstellung im Bereich des Befestigungs- und Einbettelements,
Fig. 2c
die Vergrößerung des angeschnittenen Bereichs aus Fig. 2b und
Fig. 3
eine perspektivische Ansicht eines zweiten Ausführungsbeispiels mit einem Schnitt durch das Pufferelement.
Show it:
1
a perspective view of a first embodiment of a safety buffer for an elevator or crane with a section of the buffer element,
Figure 2a
the supervision of the first embodiment of the safety buffer,
Figure 2b
the side view of the first embodiment of the safety buffer with a partial sectional view in the area of the fastening and embedding element,
Figure 2c
enlarge the cropped area Figure 2b and
3
a perspective view of a second embodiment with a section through the buffer element.

Die Fign. 1 sowie 2a bis 2c zeigen unterschiedliche Ansichten eines ersten Ausführungsbeispiels eines Sicherheitspuffers 1 zum Einsatz in einem Aufzug oder Kran. Der Sicherheitspuffer weist in dem dargestellten Ausführungsbeispiel ein elastisches Pufferelement 2 auf, welches in der Darstellung zum verbesserten Verständnis des Aufbaus in der Mitte geschnitten wurde. Der Sicherheitspuffer 1 weist weiterhin eine Befestigungsvorrichtung mit einer Platte 41 auf, wobei die Befestigungsvorrichtung 4 mit einer Befestigungsfläche 23 des Pufferelements dauerhaft verbunden ist.the Figs. 1 and FIGS. 2a to 2c show different views of a first exemplary embodiment of a safety buffer 1 for use in an elevator or crane. In the exemplary embodiment shown, the safety buffer has an elastic buffer element 2, which has been cut in the middle in the illustration to improve understanding of the structure. The safety buffer 1 also has a fastening device with a plate 41, the fastening device 4 being permanently connected to a fastening surface 23 of the buffer element.

Die Befestigungsvorrichtung weist ein tellerförmiges Einbettelement 49 auf, das teilweise in Richtung des Pufferelements 2 von der Befestigungsvorrichtung 4 absteht und in dem Pufferelement 2 eingebettet bzw. von diesem teilweise umschlossen ist. In dem dargestellten Ausführungsbeispiel ist der Körper des Pufferelements 2 kreiszylindrisch als Hohlzylinder mit einem mittigen Durchgangsloch ausgestaltet, wobei die Befestigungsvorrichtung 4 als auch das Einbettelement 49 eine mittige Aussparung zur Befestigung 47 in Form einer Bohrung aufweisen. Zur Befestigung des Sicherheitspuffers 1 kann durch das mittige Durchgangsloch sowie durch die Aussparung 47 ein Befestigungsmittel, beispielsweise eine Schraube hindurch geführt werden, so dass der Kopf des Befestigungsmittels auf der Oberseite der Befestigungsvorrichtung 4, und insbesondere auf der Oberseite des Einbettelements 49, aufzuliegen kommt. Das Befestigungsmittel kann auf der gegenüberliegenden Seite beispielsweise mit einem Gewinde an einer vorhandenen Struktur eines Aufzugs oder Krans verbunden werden.The fastening device has a plate-shaped embedding element 49 which partially protrudes from the fastening device 4 in the direction of the buffer element 2 and is embedded in the buffer element 2 or partially surrounded by it. In the illustrated embodiment, the body of the buffer element 2 is designed as a circular hollow cylinder with a central through hole, the fastening device 4 and the embedding element 49 having a central recess for fastening 47 in the form of a bore. To fasten the safety buffer 1, a fastening means, for example a screw, can be passed through the central through-hole and through the recess 47, so that the head of the fastening means comes to rest on the top side of the fastening device 4, and in particular on the top side of the embedding element 49. On the opposite side, the fastening means can be connected, for example, to a thread on an existing structure of an elevator or crane.

In dem dargestellten Ausführungsbeispiel ist das Einbettelement 49 tellerförmig ausgestaltet, wobei der eigentliche Körper des Einbettelements 49 aus einem flachen Blechmaterial mit einer gleichbleibenden Materialdicke ausgebildet ist, welche in der Mitte eine Vertiefung zur Ausbildung einer ersten Auflagefläche 494 aufweist. Die äußeren Kanten des Einbettelements 49 sind dabei nach oben gebogen bzw. nach oben gewölbt. Das tellerförmige Einbettelement 49 weist dabei eine mittige Befestigungsbohrung 47 sowie davon beabstandet eine Vielzahl von Aussparungen 492 auf. Die mehreren Aussparungen 492 sind dabei im nach oben gewölbten Abschnitt des Einbettelements 49 ausgebildet. Diese Aussparungen 492 ermöglichen ein Umfließen bzw. Umschäumen des Einbettelements 49 durch den Werkstoff des Pufferelements 2.In the exemplary embodiment shown, the embedding element 49 is plate-shaped, with the actual body of the embedding element 49 being made from flat sheet metal with a constant material thickness, which has a depression in the middle to form a first bearing surface 494. The outer edges of the embedding element 49 are bent or arched upwards. The plate-shaped embedding element 49 has a central fastening bore 47 and a large number of recesses 492 spaced therefrom. The multiple recesses 492 are formed in the section of the embedding element 49 that is curved upwards. These recesses 492 allow the material of the buffer element 2 to flow around or foam around the embedding element 49.

In dem dargestellten Ausführungsbeispiel ist die Befestigungsvorrichtung 4 als zwei separate Bauteile 6,8 ausgeführt, wobei das tellerförmige Einbettelement 49 als Bauteil 8 und die Platte 41 der Befestigungsvorrichtung 4 als Bauteil 6 ausgeführt ist. Weiterhin weist das mindestens eine Einbettelement 49 eine erste Auflagefläche 494 auf, welche zumindest teilweise auf einer Verbindungsfläche 43 der Befestigungsvorrichtung aufliegt. In einer alternativen Ausführungsform kann es jedoch auch vorgesehen sein, dass die separaten Bauteile 6,8 stoffschlüssig verbunden, insbesondere miteinander verlötet oder verschweißt werden.In the exemplary embodiment shown, the fastening device 4 is designed as two separate components 6 , 8 , the plate-shaped embedding element 49 being designed as component 8 and the plate 41 of the fastening device 4 as component 6 . Furthermore, the at least one embedding element 49 has a first support surface 494, which is at least partially on a Connecting surface 43 rests on the fastening device. In an alternative embodiment, however, it can also be provided that the separate components 6.8 are materially connected, in particular soldered or welded to one another.

Das Pufferelement 2 ist in dem dargestellten Ausführungsbeispiel an die Befestigungsvorrichtung 4 angeschäumt, wobei das Einbettelement 49 zumindest teilweise von dem Pufferelement 2 umschäumt und damit in dieses eingebettet ist.In the exemplary embodiment shown, the buffer element 2 is foamed onto the fastening device 4, with the embedding element 49 being at least partially surrounded by foam from the buffer element 2 and thus being embedded in it.

Die Platte 41 der Befestigungsvorrichtung weist in dem dargestellten Ausführungsbeispiel eine umlaufende Seitenfläche 412 auf, welche zumindest teilweise von dem Pufferelement 2 bedeckt ist.In the exemplary embodiment shown, the plate 41 of the fastening device has a peripheral side surface 412 which is at least partially covered by the buffer element 2 .

Fig. 3 zeigt ein zweites Ausführungsbeispiel eines Sicherheitspuffers 1, wobei anders als in der ersten Ausführungsform des plattenförmigen Befestigungselements nicht kreiszylinderförmig, sondern in dem dargestellten Ausführungsbeispiel quadratisch ausgeführt ist und wobei die Platte 41 größer als die Befestigungsfläche 23 des Pufferelements ausgestaltet ist, derart, dass die Platte das Pufferelement umfangsmäßig überragt. Die Platte 41 der Befestigungsvorrichtung 4 verfügt dabei in dem dargestellten Ausführungsbeispiel über eine Vielzahl von Aussparungen 47, worüber der Sicherheitspuffer 1 an eine vorhandene Struktur eines Aufzugs oder Krans angeordnet bzw. an dieser befestigt werden kann. 3 shows a second embodiment of a safety buffer 1, in which, unlike in the first embodiment, the plate-shaped fastening element is not circular-cylindrical, but square in the illustrated embodiment, and the plate 41 is designed larger than the fastening surface 23 of the buffer element, such that the plate Buffer element surpasses the circumference. In the exemplary embodiment shown, the plate 41 of the fastening device 4 has a large number of recesses 47, via which the safety buffer 1 can be arranged on an existing structure of an elevator or crane or can be fastened to it.

Claims (14)

  1. A safety buffer (1) for an elevator or a crane, comprising
    - an elastic buffer element (2), and
    - a fastening device (4),
    - wherein said buffer element (2) comprises a fastening face (23) at a first end (21),
    - wherein said fastening device (4) comprises a plate (41),
    - wherein said fastening device (4) comprises at least one embedded element (49), wherein said at least one embedded element (49) at least partly protrudes from said fastening device (4) towards said buffer element (2) and is embedded in said buffer element (2), wherein said fastening device (4) is permanently connected to said fastening face (23) of said buffer element (2) and said buffer element (3) is foamed to said fastening device (4),
    characterized in that
    said at least one embedded element (49) is enclosed by the foam of said buffer element (2).
  2. The safety buffer (1) according to claim 1, characterized in that the fastening device (4) comprises at least one wing-shaped embedded element (49) obliquely protruding from the plate (41).
  3. The safety buffer (1) according to any one of claims 1 or 2, characterized in that the at least one embedded element (49) is of a saucer-shaped configuration.
  4. The safety buffer (1) according to any one of claims 1 to 3, characterized in that the at least one embedded element (49) comprises at least one recess (492) in the part protruding from the plate (41).
  5. The safety buffer (1) according to any one of claims 1 to 4, characterized in that the fastening device (4) and the embedded element (49) are configured as at least two separate components (6, 8).
  6. The safety buffer (1) according to claim 5, characterized in that the at least one embedded element (49) comprises a first support face (494), wherein said first support face (494) at least partly rests upon a connecting face (43) of the fastening device (4).
  7. The safety buffer (1) according to any one of claims 5 or 6, characterized in that the at least one embedded element (49) and the fastening device (4) are connected in a substance-to-substance manner or integrally formed with each other.
  8. The safety buffer (1) according to any one of claims 1 to 7, characterized in that the fastening device (4) is made from a metal or a metal alloy.
  9. The safety buffer (1) according to any one of claims 1 to 8, characterized in that the fastening device (4) comprises a surface (45) compatible with the material of the buffer element (2) for creating a chemical bonding between said fastening device (4) and said buffer element (2).
  10. The safety buffer (1) according to any one of claims 1 to 9, characterized in that at the side face (24) of the buffer element (2) at least one at least partially circumferential expansion joint (25) is recessed.
  11. The safety buffer (1) according to any one of claims 1 to 10, characterized in that the plate (41) of the fastening device (4) comprises a circumferential side face (412) which is at least partly covered by the buffer element (2).
  12. The safety buffer (1) according to any one of claims 1 to 11, characterized in that the plate (41) of the fastening device (4) is of a circular configuration with a constant radius.
  13. The safety buffer (1) according to any one of claims 1 to 12, characterized in that the fastening device (4) comprises at least one recess for the passage of a fastener.
  14. The safety buffer (1) according to any one of claims 1 to 13, characterized in that the buffer element (2) is preferably made from a foamed plastic material.
EP18176749.2A 2017-06-14 2018-06-08 Safety buffer for a lift or crane Active EP3415456B1 (en)

Applications Claiming Priority (1)

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DE202017003176.0U DE202017003176U1 (en) 2017-06-14 2017-06-14 Safety buffer for a lift or crane

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EP3415456A1 EP3415456A1 (en) 2018-12-19
EP3415456B1 true EP3415456B1 (en) 2022-03-30

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EP (1) EP3415456B1 (en)
CN (1) CN208948618U (en)
DE (1) DE202017003176U1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419539A (en) * 1993-08-16 1995-05-30 Freudenberg-Nok General Partnership Elastomeric shock absorber with positioning insert
EP2366653B1 (en) * 2010-03-17 2012-10-24 Acla-Werke GmbH Impact buffer
KR101403650B1 (en) * 2012-12-05 2014-06-05 주식회사 이엠텍 Shock absorber apparatus for elevator
DE202017107541U1 (en) * 2017-12-11 2018-01-15 P + S Polyurethan - Elastomere Gmbh & Co. Kg Buffers

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EP3415456A1 (en) 2018-12-19
CN208948618U (en) 2019-06-07
DE202017003176U1 (en) 2018-02-14

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