EP3415456B1 - Sicherheitspuffer für einen aufzug oder kran - Google Patents

Sicherheitspuffer für einen aufzug oder kran 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
Authority
EP
European Patent Office
Prior art keywords
buffer
fastening device
safety
safety buffer
fastening
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.)
Active
Application number
EP18176749.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3415456A1 (de
Inventor
Gerhard Kieffer
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.)
Acla Werke GmbH
Original Assignee
Acla Werke GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Acla Werke GmbH filed Critical Acla Werke GmbH
Publication of EP3415456A1 publication Critical patent/EP3415456A1/de
Application granted granted Critical
Publication of EP3415456B1 publication Critical patent/EP3415456B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Connection Of Plates (AREA)
EP18176749.2A 2017-06-14 2018-06-08 Sicherheitspuffer für einen aufzug oder kran Active EP3415456B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202017003176.0U DE202017003176U1 (de) 2017-06-14 2017-06-14 Sicherheitspuffer für einen Aufzug oder Kran

Publications (2)

Publication Number Publication Date
EP3415456A1 EP3415456A1 (de) 2018-12-19
EP3415456B1 true EP3415456B1 (de) 2022-03-30

Family

ID=61301944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18176749.2A Active EP3415456B1 (de) 2017-06-14 2018-06-08 Sicherheitspuffer für einen aufzug oder kran

Country Status (3)

Country Link
EP (1) EP3415456B1 (zh)
CN (1) CN208948618U (zh)
DE (1) DE202017003176U1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111120555A (zh) * 2019-12-30 2020-05-08 镇江朝阳机电科技有限公司 一种聚氨酯缓冲器

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 (de) * 2010-03-17 2012-10-24 Acla-Werke GmbH Puffer zum Abfangen von Stössen
KR101403650B1 (ko) * 2012-12-05 2014-06-05 주식회사 이엠텍 엘리베이터 충격흡수장치
DE202017107541U1 (de) * 2017-12-11 2018-01-15 P + S Polyurethan - Elastomere Gmbh & Co. Kg Aufsetzpuffer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE202017003176U1 (de) 2018-02-14
EP3415456A1 (de) 2018-12-19
CN208948618U (zh) 2019-06-07

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