EP2759506A1 - Teleskopische Säule - Google Patents

Teleskopische Säule Download PDF

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Publication number
EP2759506A1
EP2759506A1 EP20140150816 EP14150816A EP2759506A1 EP 2759506 A1 EP2759506 A1 EP 2759506A1 EP 20140150816 EP20140150816 EP 20140150816 EP 14150816 A EP14150816 A EP 14150816A EP 2759506 A1 EP2759506 A1 EP 2759506A1
Authority
EP
European Patent Office
Prior art keywords
stem
telescopic column
external
arm
rope
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
EP20140150816
Other languages
English (en)
French (fr)
Other versions
EP2759506B1 (de
Inventor
Vittorio Lancini
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.)
Lanmar SpA
Original Assignee
Lanmar SpA
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 Lanmar SpA filed Critical Lanmar SpA
Publication of EP2759506A1 publication Critical patent/EP2759506A1/de
Application granted granted Critical
Publication of EP2759506B1 publication Critical patent/EP2759506B1/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
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure

Definitions

  • the present invention is generally applicable in the technical field of the lifting devices and, particularly, the object is a telescopic column.
  • the present invention relates to a telescopic column of the type using ropes.
  • extendible systems are usually used for the lifting operation.
  • the most widely used are telescopic columns comprising two or more stems and, on the top of said columns, there are the objects or the people to be lifted.
  • the system for lifting or lowering the telescopic column may be both of the mechanic and hydraulic types.
  • one or more ropes controlled by winches or the like are generally used.
  • air or oil hydraulic systems are generally used.
  • the lever is activated as a consequence of the rope breaking. More in details, the lever is activated through the translation of a pivot pin of a pulley inside two partially overimposed slots which develop according to two mutually non-aligned and non-parallel axis.
  • the translation movements provoke not only a rubbing of the pin on the slots which may cause their wear, but such translations may also be hindered by the presence of dirt or foreign bodies in one of said slots.
  • the getting dirty or the clogging, partial too, of the slots are events difficult to detect because the inspection of the system is difficult since such system is located inside the stems.
  • the telescopic column is generally used outdoors and this favors the getting dirty or the like which may jeopardize the translation of the pin in the slots and, as a consequence, also the correct functioning of the safety lock.
  • Object of the present invention is to at least partially overcome the above mentioned drawbacks, by providing a telescopic column having one locking assembly of the sliding of one stem inside the other after the breaking of ropes.
  • Another object is that the above mentioned locking assembly allows easy inspection and maintenance.
  • Another object is that the locking assembly does not present reciprocally sliding parts in order to avoid the damaging thereof because of rubbing.
  • Another object is that the locking assembly is easy to clean in order to avoid that dirt or foreign bodies may undermine its functionality.
  • an additional object is that the locking assembly of the column of the invention operates correctly also in the presence of dirt and foreign bodies.
  • Another object of the invention is that the telescopic column presents decreased frictions between the stems in comparison with the equivalent known columns in order to facilitate lifting and closure.
  • the telescopic column comprises at least one pair of stems slidably arranged one inside the other, at least the inside of which being provided with a plurality of slots arranged mutually aligned along the longitudinal extension axis of the same stem.
  • the telescopic column also comprises at least one rope connected at least to the stem immediately external to the internal stem for the handling of the latter with respect to the external stem.
  • the column comprises at least one locking assembly of the sliding of the internal stem with respect to the external stem at least in the direction of penetration of the internal stem into the external one.
  • the locking assembly comprises at least one lever that has a pivot pin placed at an intermediate point of the lever itself.
  • One first end of the lever is capable of entering in at least one of the slots to lock the sliding movement in the direction of penetration of the internal stem in the external one. Besides this, there be elastic means capable of pushing the first end to be inserted into the slots.
  • the lever has one second end placed in contact with the rope so that the pressure exerted by the rope on the second end, when the rope is tightened, contrasts the action of the elastic means maintaining the first end disengaged from any slot.
  • the telescopic column of the invention has a locking assembly whose functioning depends on the oscillation of a lever pivoted at an intermediate point of it and not at one of its ends.
  • the locking is activated by rotating the lever on its pin without the mechanical translations of pins in slots.
  • the rest status of the locking assembly of the invention is kept by the pressure exerted by the rope on the second arm of the lever, that is, advantageously, through mechanical pressure and not through translations with rubbing frictions. This allows to save, in the long time, the functionality of the locking group of the invention.
  • the locking assembly is not subject to the effects caused by dirt or by insertion of foreign bodies.
  • the locking assembly of the column of the invention is positioned outside the external stem and this allows, advantageously, the constant inspection, the easy cleaning and, likewise, the easy maintenance.
  • a telescopic column 1 suitable for the lifting of vaious loads.
  • a telescopic column for the lifting of illumination groups P is represented, however this shall not be considered limiting for different applications like, for example, the lifting of people.
  • the telescopic column 1 comprises a plurality of stems 2 slidably arranged one inside the other.
  • all the other stems 4 are intended to slide inside another stem 2 and are provided with, as it can be observed in the particular of fig. 2 , a plurality of slots 5 arranged mutually aligned along the longitudinal extension axis X of the respective stem 4.
  • the first stem is provided with slots or only some of the stems are provided with slots.
  • the stems are of square section, but also this detail shall not be considered as limiting for different embodiments in which the stems have a section of a different geometric shape.
  • a very simple example is a telescopic column with the stems having circular section.
  • the telescopic column 1 is of the rope type. In this sense, it comprises, as it can be observed in the particular of fig. 3 , a plurality of ropes 6 each coupled to an internal stem 7 and with the one immediately external 8 to the internal stem. Such ropes 6 allow the lifting of the column 1 and, for the safety reasons previously cited, the column 1 comprises also a plurality of locking assemblies 10 of the sliding of the internal stems 7 with respect to the respective external stems 8 in the direction of penetration of the internal stems into the external ones in case of breaking of the corresponding ropes 6.
  • each locking assembly 10 comprises a support body 10a typically connected to the external surface of the external stem 8.
  • the locking assembly 10 comprises also a lever 11.
  • the latter has a pivot pin 12 placed at an intermediate point of the lever 11 and bound to the support body 10a.
  • the lever 11 has two arms 13 and 14 corresponding to its two ends 15 and 16.
  • the first arm 13 is susceptible to enter one of the slots 5 to lock the sliding movement in the direction of penetration of the internal stem 7 inside the stem immediately external.
  • the insertion movement is obtained by elastic means 18, typically constituted by a spring, susceptible to push the first arm 13 in the direction of penetration into a slot 5.
  • the elastic means 18 have a first end 19 connected to the first arm 13 of the lever 11 and a second end 20 connected to the support body 10a. The elastic means 18, then, are pulled when the first arm 13 is far from the internal stem 7 and, so, also from the slots 5. When they are able to move freely, they tend to return to rest position while dragging the first arm 13 towards the stem 2 and to insert themselves, if possible, into a slot 5.
  • the locking assembly 10 comprises also adjustment means 21 for the tightening of the elastic means 18 in order to regulate the action thereof.
  • adjustment means 21 for the tightening of the elastic means 18 in order to regulate the action thereof.
  • they are constituted by screw means through which the connection point of the first end 19 of the elastic means 18 is moved, but this shall not be considered as limiting for different embodiments of the invention.
  • the second arm 14 of the lever 11 is placed in contact with the corresponding rope 6 so that the pressure exerted by the latter, when it is tightened, contrasts the action of the elastic means 18 keeping the first arm 13 disengaged from any slot 5.
  • the rope 6 typically has one first end connected to the relative internal stem 7 and one second end connected to the relative external stem 8 (which is also the one to which the locking assembly 10 is connected), for the good functioning of the telescopic column 1 it must be always tightened. Such tightening leads the rope 6 to press on the second arm 14 contrasting the effects of the elastic means 18 and keeping the first arm 13 far from the slots 5. The sliding between the stems 2 is then free.
  • the locking assembly 10 of the invention allows the fast block of the slipping of one stem 2 inside another in case of breaking of the corresponding rope 6. Besides this, it can easily be inspected since it is placed outside the stems 2 and, as a consequence, it has an easy maintenance.
  • the action of the locking assembly 10 is due to elastic means and to the pressure of the rope 6 on the second arm 14 of the lever 11, advantageously dirt or foreign bodies are not able, in any case, to undermine the action of the locking assembly 10. So, the latter is safe and requires little maintenance. Furthermore, it does not present rubbing movements and the like, so it is not subject to wear.
  • the locking assembly 10 comprises also a transfer pulley 25 which represents the only part of the assembly 10 always moving, and this guarantees the almost total absence, in the locking assembly 10, of parts gradually subject to wear.
  • the rotation center of the pulley 25 coincides with the pivot pin 12 of the lever 11.
  • one of the problems of the known prior art is the easiness extraction of the internal stems 2.
  • the column 1 comprises a slide assembly 30 interposed between one portion of the internal stem 7 and one corresponding portion of the corresponding external stem 8 in order to facilitate the sliding of one inside the other.
  • the slide assembly 30 comprises four first pulleys 31 connected to the ends of the locking assembly 10 and further four second pulleys 32 connected to the opposite end of the stem 2.
  • the first pulleys 31 allow to facilitate the sliding between the stem 2 to which the same are connected and the immediately internal stem, the second pulleys 32 between the stem 2 to which they are connected and the immediately external one.
  • the position of the first 31 and the second pulleys 32, that is at the ends of the stems 2 allow to keep centered each stem 2 with respect to the immediately external one, facilitating, in this way, the sliding.
  • slide assembly 30 it is self-evident that what has been just described is only one embodiment example of the slide assembly 30. So, this has not to be considered as limiting for different embodiments in which, for example, the stem section is not quadrangular and, consequently, the number and disposition of the pulleys change. Also the position and the number of the slide assemblies may vary, likewise, the pulleys may be replaced by different elements like, for example, bearings.
  • the telescopic column overcomes the drawbacks of the known prior art since it is provided with a locking assembly for the sliding of one stem inside the other, after the breaking of ropes and this locking assembly has easy inspection and maintenance.
  • the locking assembly does not have reciprocally sliding parts so that the wear for rubbing is avoided and the good functioning of the locking assembly is guaranteed over time.
  • the locking assembly is also easy to be cleaned and, in any case, dirt or foreign bodies do not undermine the functionality thereof.
  • the telescopic column of the invention is safe and easy to use also thanks to the slide assemblies which substantially reduce the sliding frictions between the stems with respect to the known equivalent columns.
  • the telescopic column of the invention is susceptible to many changes and variants, all falling within the inventive concept expressed in the annexed claims. All particulars may be replaced by other technically equivalent elements, and the materials may be different according to the needs, without departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Tents Or Canopies (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
  • Steering Controls (AREA)
EP14150816.8A 2013-01-23 2014-01-10 Teleskopische Säule Active EP2759506B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000006A ITBS20130006A1 (it) 2013-01-23 2013-01-23 Una colonna telescopica

Publications (2)

Publication Number Publication Date
EP2759506A1 true EP2759506A1 (de) 2014-07-30
EP2759506B1 EP2759506B1 (de) 2016-01-06

Family

ID=47780131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14150816.8A Active EP2759506B1 (de) 2013-01-23 2014-01-10 Teleskopische Säule

Country Status (2)

Country Link
EP (1) EP2759506B1 (de)
IT (1) ITBS20130006A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063783A1 (de) * 1981-04-28 1982-11-03 DORNIER SYSTEM GmbH Teleskopartig längenveränderliche Einrichtung
DE3116770A1 (de) * 1981-04-28 1982-11-18 Dornier System Gmbh, 7990 Friedrichshafen "teleskopartig laengenveraenderliche einrichtung"
JP2001060412A (ja) * 2000-01-01 2001-03-06 Wako Kikai Kogyo Kk 投光機
EP1674791A1 (de) 2004-01-15 2006-06-28 Light Boy Co., Ltd Projektor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063783A1 (de) * 1981-04-28 1982-11-03 DORNIER SYSTEM GmbH Teleskopartig längenveränderliche Einrichtung
DE3116770A1 (de) * 1981-04-28 1982-11-18 Dornier System Gmbh, 7990 Friedrichshafen "teleskopartig laengenveraenderliche einrichtung"
JP2001060412A (ja) * 2000-01-01 2001-03-06 Wako Kikai Kogyo Kk 投光機
EP1674791A1 (de) 2004-01-15 2006-06-28 Light Boy Co., Ltd Projektor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 200137, Derwent World Patents Index; AN 2001-347710 *

Also Published As

Publication number Publication date
EP2759506B1 (de) 2016-01-06
ITBS20130006A1 (it) 2014-07-24

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