EP1981801B1 - Table elevatrice a pietements articules - Google Patents

Table elevatrice a pietements articules Download PDF

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Publication number
EP1981801B1
EP1981801B1 EP07730923A EP07730923A EP1981801B1 EP 1981801 B1 EP1981801 B1 EP 1981801B1 EP 07730923 A EP07730923 A EP 07730923A EP 07730923 A EP07730923 A EP 07730923A EP 1981801 B1 EP1981801 B1 EP 1981801B1
Authority
EP
European Patent Office
Prior art keywords
sub
arms
hinged
table according
pairs
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
EP07730923A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1981801A1 (fr
Inventor
Mathieu Tep
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1981801A1 publication Critical patent/EP1981801A1/fr
Application granted granted Critical
Publication of EP1981801B1 publication Critical patent/EP1981801B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration

Definitions

  • the present invention relates to a lifting table with articulated legs of the type usually referred to as "scissor lift table".
  • a lifting table is for example described in the document DE 200 16 624 U1 .
  • One of the two arms of each of the pairs is articulated by one of its ends on a support structure while its other end is guided by a slide secured to the trays of the table.
  • the other arm is articulated at one of its ends on the table top while its other end is guided by a slideway secured to the support structure.
  • the two arms of each pair comprise two pairs of cam surfaces each defining a variable angle angular abutment.
  • the actuation of the table is then provided by means of two thrust axes movable under the action of motor means which act on the two angular stops of each pair of arms to cause (by a wedge effect) a variation of said angle and therefore, the height of the table.
  • the motor means comprise a geared motor integral with one of the two axes and which generates, by means of belts, traction on the second shaft in the direction of the first.
  • the thrust axes exert on the angular stops a symmetrical action tending to cause a rotation of one arm relative to the other in one direction or the other thereby causing an elevation or a lowering from the table top.
  • the object of the invention is therefore more particularly to eliminate these disadvantages.
  • the base comprises two pairs of arms articulated in their central region around two respective axes of articulation coaxial, one of the two arms of each of pairs being articulated by one of its ends on a support structure and being guided by its other end by an upper slide secured to the table top, the other arm being hinged at one of its ends on the plate of the table and guided at its other end by a lower slide or the like integral with the support structure.
  • this device is characterized in that one of the arms of each of said pairs comprises two cam profiles substantially symmetrical with respect to the axis of articulation of said pair while on the other arm of the same pair are articulated two connecting rods about two respective axes symmetrical with respect to said axis of articulation, these two connecting rods carrying two respective rollers for to cooperate respectively with the two cam profiles, the rods homologous to the two pairs of arms being furthermore interconnected by two parallel transverse shafts bearing at least two respective return pulleys around which, following a sinuous path (in Z ), at least one strap whose one end is fixed to the ends of two homologous arms sliding in upper slides of the table top and whose other end is coupled to a motorization adapted to exert on the strap a force of traction.
  • a rupture sensor may be provided so as to prevent the occurrence of a rupture of the strap or straps and to take all the necessary safety measures.
  • the shape of the cams may be designed to obtain a constant lifting speed.
  • the arms B 2 and B ' 2 are substantially rectilinear and have a substantially rectangular section. They each comprise two cams C 1 , C 2 - C ' 1 , C' 2 whose profiles are arranged symmetrically with respect to the axes of articulation A 1 , A 2 on either side of the arm B 2 , B ' 2 in the vertical plane of movement of the arms B 1 , B 2 and B ' 1 , B' 2 .
  • the arms B 1 and B ' 1 have a substantially Z-shaped shape and have two parallel sections T 1 , T 2 - T' 1 , T ' 2 interconnected at one of their ends by means of a portion central I 1 , I ' 1 curved profile.
  • the sections T 1 , T 2 of the arm B 1 each carry, in the vicinity of the central region I 1 , a link BL 1 , BL 2 articulated by one of its ends on the section T 1 , T 2 around a horizontal axis parallel to the axes A 1 , A 2 .
  • This link BL 1 , BL 2 has at its other end a coaxial bore in which engages a transverse shaft AT 1 , AT 2 .
  • This common shaft AT 1 , AT 2 is provided at one of its ends with a respective roller GA 1 , GA 2 intended to bear respectively on the cam profiles C 1 , C 2 .
  • the arm sections T ' 1 , T' 2 each carry, in the vicinity of their central regions I ' 1 , a rod BL' 1 , BL ' 2 articulated by one of its ends on the section T' 1 , T ' 2 about a horizontal axis coaxial with the axis of articulation of the homologous link BL 1 , BL 2 .
  • This link BL ' 1 , BL' 2 has at its other end a coaxial bore in which engages the transverse shaft AT 1 , AT 2 which is common to the two pairs of rods homologous.
  • this common shaft AT 1 , AT 2 is provided at its end opposite the roller GA 1 , GA 2 , a second roller GA ' 1 , GA' 2 intended to bear on a corresponding cam profile C 1 , C 2 .
  • the transverse shafts AT 1 , AT 2 are provided in their central region with a coaxial tubular sleeve, free in rotation constituting a pulley P 1 , P 2 .
  • the operation of the table is provided by means of straps (here two straps S 1 , S 2 ) which pass over the pulleys P 1 , P 2 following a sinuous path to be fixed by the one of their end on a spreader PA secured to a cross member TR connecting the ends of the arms B 1 , B ' 1 which slide in the upper rails and wind through their other end on a drum TA rotatably mounted on the support structure 1 around a transverse axis coupled to the output of a geared motor M.
  • straps here two straps S 1 , S 2
  • the straps S 1 , S 2 pass around a pulley P 3 rotatably mounted on the support structure 1 about a transverse axis and then follow a first straight path before passing around the pulley P 2 on which they pass, on the opposite side to the pulley P 1 .
  • the straps then make a rectilinear path before passing around the pulley P 1 on the opposite side to the pulley P 2 .
  • the tensile force exerted on the straps S 1 , S 2 by the drum TA driven by the motor M is reflected on the pulleys P 1 , P 2 on which two parallel forces are exerted which generate on the arms two pairs of rotation in opposite directions of each other whose moments depend on the position of the rollers GA 1 , GA 2 - GA ' 1 , GA' 2 on the cam surfaces C 1 , C 2 - C ' 1 , C' 2 .
  • the fixed support structure consists of a rectangular metal frame whose two longitudinal uprights are formed by U-section sections whose anterior parts constitute the slides - G 1 and G 2 in which are engaged rollers carried by the ends of the arms B 2 , B ' 2 .
  • the support rails of the plate are constituted by U-section sections in which rollers carried by the ends of the arms B 1 , B ' 1 engage.
  • the lateral stability of the table is provided here by connecting plates connecting the homologous sections T 1 , T ' 1 - T 2 , T' 2 of the arms B 1 , B ' 1 .
  • the strap rupture sensor associated with the lifter PA, can be coupled to a safety device capable of locking during the downward movement of the table to prevent the lift table from falling abruptly as a result of a strap rupture.
  • This sensor may also be used to detect the presence of an obstacle opposing the descent of the table top.
  • This solution also has the advantage of dispensing with the use of a low overtravel detector usually used to protect the mechanism.
  • the number and the nature of the straps can be determined according to the weight of the loads that the lift table is made to support.
  • the rods BL 1 , BL 2 - BL ' 1 , BL' 2 have an H-shaped structure, comprising two parallel wings connected by a cross member. This structure defines on one side a clevis joint in which engages a corresponding section of arms B 1 , B ' 1 .
  • the other end forms a double bearing in which engages the axis of the pulleys P 1 , P 2 .

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Baking, Grill, Roasting (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
  • Passenger Equipment (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP07730923A 2006-02-09 2007-02-02 Table elevatrice a pietements articules Active EP1981801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0601191A FR2897049B1 (fr) 2006-02-09 2006-02-09 Table elevatrice a pietements articules.
PCT/FR2007/000207 WO2007090954A1 (fr) 2006-02-09 2007-02-02 Table elevatrice a pietements articules

Publications (2)

Publication Number Publication Date
EP1981801A1 EP1981801A1 (fr) 2008-10-22
EP1981801B1 true EP1981801B1 (fr) 2010-09-15

Family

ID=36754695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07730923A Active EP1981801B1 (fr) 2006-02-09 2007-02-02 Table elevatrice a pietements articules

Country Status (7)

Country Link
EP (1) EP1981801B1 (tr)
AT (1) ATE481352T1 (tr)
DE (2) DE202006003583U1 (tr)
ES (1) ES2354473T3 (tr)
FR (1) FR2897049B1 (tr)
TR (1) TR200700552U (tr)
WO (1) WO2007090954A1 (tr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2019076A1 (de) * 2007-07-27 2009-01-28 Ludwig Göcke Scherenhubvorrichtung
FR2961799A1 (fr) * 2010-06-23 2011-12-30 Normands De Const Ind Atel Table elevatrice
CN114988321A (zh) * 2022-06-14 2022-09-02 南京林业大学 一种剪刀杆升降台

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20016624U1 (de) * 2000-09-22 2000-11-23 Penzek, Eckhardt, Dipl.-Ing., 66386 St Ingbert Scherenhubtisch
FR2837193A1 (fr) * 2002-03-12 2003-09-19 Transportes Continuos Interior Table elevatrice a ciseaux
DE102004057055A1 (de) * 2004-11-25 2006-06-01 Ernst Langewellpott Scheren-Hubtisch

Also Published As

Publication number Publication date
ES2354473T3 (es) 2011-03-15
EP1981801A1 (fr) 2008-10-22
DE602007009193D1 (de) 2010-10-28
ATE481352T1 (de) 2010-10-15
WO2007090954A1 (fr) 2007-08-16
DE202006003583U1 (de) 2006-07-27
TR200700552U (tr) 2007-09-21
FR2897049A1 (fr) 2007-08-10
FR2897049B1 (fr) 2008-05-09

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