EP1961690A1 - Drehbare Tragöse - Google Patents

Drehbare Tragöse Download PDF

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Publication number
EP1961690A1
EP1961690A1 EP07425102A EP07425102A EP1961690A1 EP 1961690 A1 EP1961690 A1 EP 1961690A1 EP 07425102 A EP07425102 A EP 07425102A EP 07425102 A EP07425102 A EP 07425102A EP 1961690 A1 EP1961690 A1 EP 1961690A1
Authority
EP
European Patent Office
Prior art keywords
screw
bushing
opening
head
base
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.)
Withdrawn
Application number
EP07425102A
Other languages
English (en)
French (fr)
Inventor
Roberto Frigerio
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.)
Stamperia Carcano Giuseppe SpA
Original Assignee
Stamperia Carcano Giuseppe 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 Stamperia Carcano Giuseppe SpA filed Critical Stamperia Carcano Giuseppe SpA
Priority to EP07425102A priority Critical patent/EP1961690A1/de
Publication of EP1961690A1 publication Critical patent/EP1961690A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof

Definitions

  • the present invention relates to a fastening device, of the type comprising a screw for the fixing to an object and a rotational lifting eyelet.
  • fastening devices for the lifting of heavy objects of various type, comprising an eyelet adapted to fix and lift by means of means of various type, such as ropes, chains, hoists or other.
  • the eyelet is secured to the object in various manners, e.g. by means of threaded pins or screws.
  • the eyebolt is appropriately rotational about the pin or screw, so as to allow a correct alignment thereof with respect to the direction of the force acting on it by the aforementioned lifting fixing means.
  • EP 0 654 611 describes a lifting eyelet having a base and an opening for fixing in an object to be lifted by means of a screw.
  • the screw an Allen screw, presents a flange at the head for withholding the base of the eyelet against the object to which the eyelet must be secured.
  • the screw presents a non-treaded portion, of larger diameter with respect to the threaded end (and such that it allows an adequate clearance with the opening of the base of the eyelet) and of such a length that, by completely screwing the threaded end into the object to be fixed, there is a sufficient clearance between the flange, the base of the eyelet and the surface of the object. This allows to completely screw the screw, with a suitable tightening torque, and allows the free rotation of the eyelet about the axis of the screw, without risk of feeding and loosening of the latter.
  • a fastening device comprising:
  • the bushing is dimensioned so that between said head and said element there is a sufficient clearance to allow the rotation of the fastening element about the bushing also when the screw is completely fastened (this means that one free end of the stem which protrudes from the bushing is completely screwed) into the object.
  • the bushing is preferably cylindrical and its internal diameter is, obviously, such to accommodate the stem of the screw, the external diameter is such to allow a sufficient clearance with the walls of said opening.
  • the screw must be able to be tightened in the object, compressing the bushing, with a torque suitable for the intended use of the device, generally such that it prevents the undesired loosening thereof. Therefore, the length of the stem must be sufficient so that the part of the stem protruding from the base of the element and from the bushing, part which is actually screwed into the object, is of sufficient length.
  • the bushing presents a flange at one end and the opening presents a seat intended to accommodate said flange and, optionally, at least part of the screw head.
  • the figures show a device according to the present invention.
  • the device presents a fastening element 5 which comprises connection eyelet 4, adapted to the passage of other means for securing the object, to which the object is adapted to be fixed.
  • Such means may be, for example, chains, ropes, hooks or the like.
  • Base 3 whose lower surface 6 is intended to face the surface of the object, belongs to element 5, integral with the eyelet.
  • Said base presents an opening 7, preferably a cylindrical hole, intended to accommodate stem 9 of a screw 1 and a bushing 2.
  • the opening has an axis of symmetric essentially parallel or preferably contained on the plane on which the eyelet lays (plane perpendicular to the eyelet axis).
  • the screw presents head 8 and threaded stem 9, whose free end, protruding from bushing 2, is intended to be screwed into a corresponding threaded hole in the object.
  • Bushing 2 is adapted to be compressed between the surface of the object and the screw head. Its length is sufficient to allow a suitable clearance between the screw head or, as in the case shown and explained in better detail below, between flange 10 at the end of the bushing, base 3 and/or between base 3 and the surface of the object when the screw is fastened with suitable torque into the latter. It is apparent that this clearance, and a suitable clearance further existing between the external side walls of the bushing and the wall of opening 7, imparts to the element the freedom to rotate about the screw axis and with respect to the object, so as to adapt to the load direction.
  • bushing 2 presents a flange 10, facing screw head 8; the screw head presses directly onto it; said flange is adapted to withhold fastening element 5, when the device is secured to the object, although allowing it to rotate as described above. It is however possible for the screw head to withhold element 5 with a portion radially exceeding the bushing, e.g. if the bushing presents no flange.
  • a seat 11 adapted to accommodate screw head 8, bushing flange 10 where contemplated, preferably both, may be obtained in base 3.
  • Seat 11 may be, according to a particular embodiment of the invention, a cylindrical cavity coaxial with opening 7, but obviously wider. In such case, surface 12 delimited between the wall of opening 7 and the wall of seat 11 will interfere with the flange or screw head to withhold element 5 against the object.
  • the screw head may protrude from the opposite side with respect to the object, if preferred.
  • the dimensioning of the various parts must allow the access with appropriate screwing and unscrewing means, also considering that the screw must generally be tightened with a predetermined torque.
  • screwing and unscrewing systems if required, secured to the fastening element, which may be connected to the screw so that the fastening element may rotationally drive it for screwing and unscrewing and which may be disconnected when the free rotation of the fastening element is required.
  • Such systems are described, for example, in EP 0 654 611 .
  • screwing and unscrewing means which are completely separate from the device, to avoid the accidental connection of such means with the screw, when the device is operative.
  • the screw is an Allen screw, which makes its manoeuvre easier also in case of presence of seat 11.
  • screws of other type may be used, for example hexagonal or square headed screws, accessible for example with socket wrenches, if required.
  • Devices for preventing the removal of the screw and of the bushing, when the device is not secured to an object, may be contemplated. This prevents the replacement with unsuitable components.
  • One of more protrusions (13) may be contemplated on the surface of the fastening element, in appropriate position, such as at the upper edge of seat 11. During assembly, they may be clinched so as to create interference lips, after the insertion of screw and bushing. The removal thereof is thus only possible by applying a force such as to compromise the integrity of the element itself (breakage of the interference lips), not obtainable involuntarily or without the aid of specific tools.
  • the width of base 3 is preferably sufficient so that an external edge of surface 6 may touch the surface of the object and exchange forces therewith, in case of a load applied to eyelet 4, specifically onto its top, in direction parallel to the axis of the eyelet itself (horizontal and laying on the plane of the drawing in figure 2 ), such as to consequently be able to generate the maximum possible bending force on the screw and/or on the bushing.
  • the bending load acting on the screw and/or on the bushing may be reduced also in the unfavourable orientation conditions which the eyelet may assume in certain cases, despite its freedom of rotation as described above.
  • a person skilled in the art will know how to dimension the base also according to the clearance left between surface of the object and flange or screw head, so as to allow a suitable contact between edge and surface of the object, with an arm such as to generate an adequate load torque in all cases. This is also considering the high safety coefficients (values even equal to 4) which many standards prescribe for dimensioning, for mechanical stress resistance, of devices of this type.
  • the width of the base is appreciable from the drawings.
  • the device according to the present invention allows the use of screw of marketed type and solves the above-identified problems of the known devices.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
EP07425102A 2007-02-26 2007-02-26 Drehbare Tragöse Withdrawn EP1961690A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07425102A EP1961690A1 (de) 2007-02-26 2007-02-26 Drehbare Tragöse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07425102A EP1961690A1 (de) 2007-02-26 2007-02-26 Drehbare Tragöse

Publications (1)

Publication Number Publication Date
EP1961690A1 true EP1961690A1 (de) 2008-08-27

Family

ID=38479928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07425102A Withdrawn EP1961690A1 (de) 2007-02-26 2007-02-26 Drehbare Tragöse

Country Status (1)

Country Link
EP (1) EP1961690A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182228A1 (de) 2008-10-30 2010-05-05 Stamperia Carcano Giuseppe S.p.A. Ösenbefestigungsvorrichtung
EP2361870A1 (de) * 2010-02-25 2011-08-31 Stamperia Carcano Giuseppe S.p.A. Ringbolzen mit Abschraubvorrichtung
RU2520681C1 (ru) * 2012-12-07 2014-06-27 Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт автоматики им. Н.Л. Духова" (ФГУП "ВНИИА") Строповый подвес
US20150071732A1 (en) * 2013-09-06 2015-03-12 Yoke Industrial Corp. Eyebolt
CN105909648A (zh) * 2016-03-10 2016-08-31 天津市福厚盈科技有限公司 一种吊环螺丝钉的制备方法
IT202000004897A1 (it) * 2020-03-09 2021-09-09 Dab Pumps Spa Elettropompa a movimentazione facilitata ed elemento agganciabile per la movimentazione della stessa elettropompa

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5125861A (en) * 1990-08-20 1992-06-30 Freeman Lewis G Lifting eyebolt assembly
FR2877933A1 (fr) * 2004-11-17 2006-05-19 Edmond Altabe Anses de levage tournantes et articulables
FR2880084A1 (fr) * 2004-12-23 2006-06-30 Blaise Henrion Dispositif de fixation du type anneau de levage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5125861A (en) * 1990-08-20 1992-06-30 Freeman Lewis G Lifting eyebolt assembly
FR2877933A1 (fr) * 2004-11-17 2006-05-19 Edmond Altabe Anses de levage tournantes et articulables
FR2880084A1 (fr) * 2004-12-23 2006-06-30 Blaise Henrion Dispositif de fixation du type anneau de levage

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182228A1 (de) 2008-10-30 2010-05-05 Stamperia Carcano Giuseppe S.p.A. Ösenbefestigungsvorrichtung
EP2361870A1 (de) * 2010-02-25 2011-08-31 Stamperia Carcano Giuseppe S.p.A. Ringbolzen mit Abschraubvorrichtung
RU2520681C1 (ru) * 2012-12-07 2014-06-27 Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт автоматики им. Н.Л. Духова" (ФГУП "ВНИИА") Строповый подвес
US20150071732A1 (en) * 2013-09-06 2015-03-12 Yoke Industrial Corp. Eyebolt
CN105909648A (zh) * 2016-03-10 2016-08-31 天津市福厚盈科技有限公司 一种吊环螺丝钉的制备方法
IT202000004897A1 (it) * 2020-03-09 2021-09-09 Dab Pumps Spa Elettropompa a movimentazione facilitata ed elemento agganciabile per la movimentazione della stessa elettropompa

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