EP2078692A2 - Système de levage pour un dispositif de montage - Google Patents

Système de levage pour un dispositif de montage Download PDF

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Publication number
EP2078692A2
EP2078692A2 EP08021407A EP08021407A EP2078692A2 EP 2078692 A2 EP2078692 A2 EP 2078692A2 EP 08021407 A EP08021407 A EP 08021407A EP 08021407 A EP08021407 A EP 08021407A EP 2078692 A2 EP2078692 A2 EP 2078692A2
Authority
EP
European Patent Office
Prior art keywords
lifting system
cylinder
mounting frame
pneumatic cylinder
lifting
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Withdrawn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
EP08021407A
Other languages
German (de)
English (en)
Other versions
EP2078692A3 (fr
Inventor
Karl Harold Scholz
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.)
Efs-Gesellschaft fur Hebe- und Handhabungstechnik Mbh
Original Assignee
Efs-Gesellschaft fur Hebe- und Handhabungstechnik Mbh
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 Efs-Gesellschaft fur Hebe- und Handhabungstechnik Mbh filed Critical Efs-Gesellschaft fur Hebe- und Handhabungstechnik Mbh
Publication of EP2078692A2 publication Critical patent/EP2078692A2/fr
Publication of EP2078692A3 publication Critical patent/EP2078692A3/fr
Withdrawn legal-status Critical Current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
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/12—Trolleys or crabs, e.g. operating above runways having hoisting gear adapted to special load-engaging elements and not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions

Definitions

  • the preset angular orientation of the mounting frame does not always coincide with the positional orientation of the component to be machined.
  • the components themselves and their positioning relative to the assembly line are subject to dimensional tolerances.
  • the coupled wire ropes are substantially rigid in the longitudinal direction. As a result of their parallel coupling an angular adjustment of the mounting frame as tolerance compensation is not or only partially possible.
  • the invention has the object of developing a generic lifting system such that a compensation of positional tolerances with ease of use is possible.
  • a lifting system in which at least one power transmission element is connected in series with a pneumatic cylinder.
  • the piston in the pneumatic cylinder is movable against the force of applied gas pressure. Due to the compressibility of the gas filling in the pneumatic cylinder, a certain elasticity sets in. This elasticity is transmitted to the associated power transmission element as a result of the series connection.
  • the user can lower the mounting frame in the intended processing position. Tolerance compensation can be accomplished manually by manually applying force to one of the corners of the mounting frame. As a result of the pneumatic elasticity of the associated pneumatic cylinder, this corner yields despite the otherwise substantially rigid force transmission elements.
  • the mounting frame can be nestled against the component to be machined while compensating for positional tolerances, while its total weight is otherwise held by the force transmission elements.
  • the pneumatic cylinder is a lifting cylinder for driving the associated power transmission element.
  • the lifting cylinder takes over a double function: With appropriate control, the mounting frame can be raised or lowered, without requiring manual force is required. After positioning the mounting frame its elasticity allows the user to bring about a compensation of positional tolerances by manual pressing.
  • a total of four force transmission elements arranged at a distance from each other are provided, two of which are combined in pairs and connected to a pneumatic cylinder. Due to the four power transmission elements, the mounting frame is precisely aligned with respect to its spatial angular position. The mutually coupled force transmission elements ensure that the mounting frame is raised or lowered in parallel while maintaining its intended spatial angular position.
  • the arrangement of a total of two designed as a lifting cylinder pneumatic cylinders allows the user to use the respective pneumatic cylinder associated end of the mounting frame, regardless of the opposite end elastically yielding to bring about a position tolerance compensation.
  • the at least one pneumatic cylinder designed as a lifting cylinder is arranged lying in a flat frame of the hoist.
  • Frame and pneumatic cylinders require only a small height, so that a ceiling mounting above the production site is possible even at low room heights.
  • the pneumatic cylinder is an elastically resilient, non-driven compensating cylinder.
  • at least one compensating cylinder is connected in series with each force transmission element.
  • the power transmission elements engage at four corners of the mounting frame, wherein at each vertex each a compensating cylinder is arranged. This allows the user to compensate for positional tolerances in all spatial degrees of freedom. This can be done in particular without actuation of the lifting cylinder.
  • the arrangement of the compensating cylinder directly at the corners of the mounting frame also allows a sensitive manual dosing of the position compensation, without this being affected by frictional forces and kinematic inaccuracies of the power transmission elements in their leadership.
  • a pneumatic cylinder in the form of an elastically resilient constant pressure cylinder instead of the elastically yielding, non-driven compensating cylinder. This is adjusted with its internal pressure on the system weight, so that the lifting system is in equilibrium. As a result of the constant, path-independent pressure, the lifting system can be manually raised or lowered while maintaining the balance of forces.
  • a corresponding control and a drive for the constant pressure cylinder can be provided.
  • the power transmission element is a cable and in particular a steel cable.
  • the ropes are also yielding transversely to their longitudinal axis, so that this alone, at least in the horizontal direction readily a compensation of position tolerances is manually possible.
  • the force transmission element is a scissor lattice. The kinematics of the scissor lattice is permanent and reproducible an exact parallel guidance of the mounting frame safely.
  • the arrangement according to the invention can be used in almost any lifting systems which have gripping means or other assembly or production means.
  • the lifting system according to the invention is preferably used in applications in which the mounting frame comprises an assembly jig.
  • the benefits of the invention come into play particularly: Without the user has to carry the weight of the mounting frame or the jig, he can manually with little effort and high precision to press the assembly jig in the desired position corrective.
  • Fig. 1 shows a perspective view of an embodiment of a hoist 1 as part of a lifting system according to the invention for a mounting device.
  • the hoist 1 comprises a rigid frame 6 welded from steel profiles and intended for ceiling mounting in an assembly hall.
  • at least two power transmission elements 3 are provided, for example, after Fig. 4 can be formed as a safety gate 8 and are executed in the embodiment shown as ropes, especially as steel cables.
  • ropes especially as steel cables.
  • At least three power transmission elements 3 are provided.
  • a total of four power transmission elements 3 are arranged at a distance from each other.
  • the four power transmission elements 3 are located at vertices of a horizontal surface. This will create an in Fig. 2 shown, described in more detail below mounting frame 2, which is suspended from the power transmission elements 3, fixed in position with respect to its spatial angular orientation.
  • Fig. 2 shows a perspective view of an embodiment of a mounting frame 2, which with the four power transmission elements 3 on the hoist 1 after Fig. 1 is suspended.
  • the mounting frame 2 is designed as a welded or bolted tubular steel frame and has four a corner spanning vertices 7. At the corners 7 one end of the associated power transmission element 3 is attached.
  • a pneumatic cylinder 4 is assigned.
  • the two pneumatic cylinders 4 are designed as lifting cylinders for driving the associated power transmission elements 3.
  • they have a cylinder 17, in which a piston, not shown, is guided in a previously known manner with a piston rod, also not shown.
  • a lifting member 18 is arranged, which is under the action of pneumatic pressure in the cylinder 17 and retractable.
  • the lifting part 18 carries two pulleys 19.
  • Two further pulleys 19 are arranged at the base of the cylinder 17. It can also be a different, especially larger number of pulleys 19 may be provided.
  • the pulleys 19 are wrapped in pairs of the trained as a rope power transmission element 3, which is the output side of the pulley 19 via pulleys 10 vertically downwards and parallel to the direction of gravity directed to the associated vertices 7 of the mounting frame 2.
  • the two designed as a lifting cylinder pneumatic cylinder 4 are lying in the flat formed frame 6 of the hoist 1, resulting in the interaction with the pulleys 10 results in a flat design of the hoist 1.
  • both pneumatic cylinders 4 run exactly the same during operation, so that all four force transmission elements 3 perform the exact same stroke movement.
  • the mounting frame 2 is raised or lowered in the correct position.
  • the term selected here in exact position means that a parallel, angle error-free lifting or lowering takes place.
  • FIG. 2 The representation after Fig. 2 It can also be seen that a total of four pins 11 are provided on the mounting frame 2, which each a hook 12 on the frame 6 of the hoist 1 after Fig. 1 assigned.
  • the mounting frame 2 is in Fig. 2 with respect to its vertical axis relative to the hoist 1 Fig. 1 drawn rotated by 90 °. In a corresponding orientation can each hook 12 engage behind the associated pin 11. It turns a rest position of the mounting frame 2, in the force transmission elements 3 and the pneumatic cylinder 4 are force-free.
  • Fig. 3 shows in a side view the lifting system according to the invention with the hoist 1 after Fig. 1 and one opposite to the execution Fig. 2 geometrically slightly modified mounting frame 2.
  • the hoist 1 is fixed with steel beams 13 under a building ceiling 16.
  • rollers 14 are provided by means of which the hoist 1 can be moved horizontally on the steel beams 13.
  • the mounting frame 2 comprises an assembly jig 9 exemplarily for the setting of welds, holes or the like on a vehicle body 15 which is moved on a production line not shown in detail to the mounting location shown here.
  • the assembly jig 9, not shown, may be formed by the mounting frame 2 itself or as an individual part of a mounting frame 2, for example Fig. 2 to be assembled.
  • the mounting frame 2 can be raised and lowered by means of the power transmission elements 3 designed as cables and the pneumatic cylinders 4 designed as lifting cylinders, connected in series therewith.
  • the pneumatic cylinder 4 are designed as a smooth running cylinder. Due to the pneumatic compliance the associated pneumatic cylinder 4 in conjunction with their ease of running are the respective side of the mounting frame 2 in the vertical direction, whereby the position tolerances can be compensated.
  • the flexibility of the two pneumatic cylinders 4 only allows a slight tilting of the mounting frame 2 in one plane, namely about an axis perpendicular to the plane of the drawing Fig. 3 stands.
  • Additional degrees of freedom of elastic compliance and resulting tolerance compensation are generated by further pneumatic cylinders 5, which in Fig. 2 are shown.
  • These pneumatic cylinders 5 are formed as elastically resilient, non-driven compensating cylinder and connected in series with each of the four power transmission elements.
  • designed as a balance cylinder pneumatic cylinder 5 are attached to each one of the four vertices 7 of the mounting frame 2 and disposed between the vertices 7 and the associated ends of the power transmission elements 3 or mechanically connected in series.
  • Their flexibility based on pneumatic compressibility allows according to the above-described principle any spatial tilting of the mounting frame 2 or a translational, vertical lowering of the mounting frame 2, whereby almost any positional tolerances of the mounting frame 2 relative to the vehicle body 15 (Fig. Fig. 3 ) can be compensated.
  • Fig. 4 shows still in a front view of a variant of the arrangement Fig. 3 , in which the force transmission elements 3 are formed as a scissors grid 8. There are a total of two scissors lattice 8 are provided, which are driven by a respective pneumatic cylinder 4.
  • these two power transmission elements 3 designed as a safety lattice 3 it is advantageous for them to be fitted with at least one pneumatic cylinder 5 designed as a compensation cylinder Fig. 2 to connect in series.
  • two pneumatic cylinders 5 ( Fig. 2 ) associated with each one of the two scissor lattice 8, wherein a respective pneumatic cylinder 5 ( Fig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP08021407A 2007-12-24 2008-12-10 Système de levage pour un dispositif de montage Withdrawn EP2078692A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200720018036 DE202007018036U1 (de) 2007-12-24 2007-12-24 Hebesystem für eine Montageeinrichtung

Publications (2)

Publication Number Publication Date
EP2078692A2 true EP2078692A2 (fr) 2009-07-15
EP2078692A3 EP2078692A3 (fr) 2009-10-21

Family

ID=39155180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08021407A Withdrawn EP2078692A3 (fr) 2007-12-24 2008-12-10 Système de levage pour un dispositif de montage

Country Status (2)

Country Link
EP (1) EP2078692A3 (fr)
DE (1) DE202007018036U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105293281A (zh) * 2015-11-18 2016-02-03 德马科起重机械有限公司 一种起重机的轻便型电动小车
IT201600126670A1 (it) * 2016-12-15 2018-06-15 System Spa Mezzi di presa per un telaio modulare ed impianto comprendete i mezzi di presa.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2398730B1 (fr) * 2009-02-20 2013-08-14 Par Systems, Inc. Système de levage pour élévateur
US9738499B2 (en) 2011-04-27 2017-08-22 Par Systems, Inc. Lift assembly having a split trolley
CN105236258A (zh) * 2015-11-18 2016-01-13 中国神华能源股份有限公司 吊装方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1102586A (en) * 1965-07-20 1968-02-07 Cordwallis Engineering Co Ltd Platform lifting devices
DE2620902A1 (de) * 1975-09-12 1977-07-21 Nisso Sangyo Kk Hebevorrichtung mit einer arbeitsbuehne
DE3822291A1 (de) * 1988-07-01 1990-01-04 Babcock Werke Ag Beschickungsgeraet zum einbringen von modulen in einen reaktor
FR2675726A1 (fr) * 1991-04-25 1992-10-30 Peugeot Dispositif de manipulation de charges suspendues.
US6550584B1 (en) * 1998-10-15 2003-04-22 Snap-On Deutschland Holding Gmbh Vehicle lift of the type with four columns
JP2003221189A (ja) * 2002-01-31 2003-08-05 Yoshinobu Sato 作業用リフター
EP1717171A2 (fr) * 2005-04-29 2006-11-02 HOLZMA Plattenaufteiltechnik GmbH Dispositif de découpe de plaques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1102586A (en) * 1965-07-20 1968-02-07 Cordwallis Engineering Co Ltd Platform lifting devices
DE2620902A1 (de) * 1975-09-12 1977-07-21 Nisso Sangyo Kk Hebevorrichtung mit einer arbeitsbuehne
DE3822291A1 (de) * 1988-07-01 1990-01-04 Babcock Werke Ag Beschickungsgeraet zum einbringen von modulen in einen reaktor
FR2675726A1 (fr) * 1991-04-25 1992-10-30 Peugeot Dispositif de manipulation de charges suspendues.
US6550584B1 (en) * 1998-10-15 2003-04-22 Snap-On Deutschland Holding Gmbh Vehicle lift of the type with four columns
JP2003221189A (ja) * 2002-01-31 2003-08-05 Yoshinobu Sato 作業用リフター
EP1717171A2 (fr) * 2005-04-29 2006-11-02 HOLZMA Plattenaufteiltechnik GmbH Dispositif de découpe de plaques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105293281A (zh) * 2015-11-18 2016-02-03 德马科起重机械有限公司 一种起重机的轻便型电动小车
IT201600126670A1 (it) * 2016-12-15 2018-06-15 System Spa Mezzi di presa per un telaio modulare ed impianto comprendete i mezzi di presa.

Also Published As

Publication number Publication date
EP2078692A3 (fr) 2009-10-21
DE202007018036U1 (de) 2008-03-06

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