EP0854110A1 - Système de levage à ciseaux pour plate-formes de travail - Google Patents

Système de levage à ciseaux pour plate-formes de travail Download PDF

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Publication number
EP0854110A1
EP0854110A1 EP97122979A EP97122979A EP0854110A1 EP 0854110 A1 EP0854110 A1 EP 0854110A1 EP 97122979 A EP97122979 A EP 97122979A EP 97122979 A EP97122979 A EP 97122979A EP 0854110 A1 EP0854110 A1 EP 0854110A1
Authority
EP
European Patent Office
Prior art keywords
scissor
scissors
arms
lifting
auxiliary
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
EP97122979A
Other languages
German (de)
English (en)
Other versions
EP0854110B1 (fr
Inventor
Dirk Begemann
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.)
GSL German Standard Lift GmbH
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 EP0854110A1 publication Critical patent/EP0854110A1/fr
Application granted granted Critical
Publication of EP0854110B1 publication Critical patent/EP0854110B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers

Definitions

  • the invention relates to a scissor lift system for work platforms with a plurality of the same, arranged one above the other Scissor packs, each consisting of an outside Pair of scissors arms and a cross between them Scissor arm exist at the intersection with the Pair of scissor arms over an axis transverse to the stroke direction is articulated, with the scissor arms at the upper ends the lower ends of the respective lower scissors package the scissor arms of the respective scissors package above are articulated and there is at least one lifting cylinder, the in the area of the scissors package below its axis of action at an acute angle on the inside Scissor arm attacks and is mounted on the frame.
  • scissor scaffolds for work platforms at which are also inside scissor arm pairs, whose Scissor arms are spaced from each other, already started between the inner scissor arms another one above the lower lifting cylinder To provide lifting cylinders.
  • a scissor lift system of the generic type kind of this is however not possible because this is a so-called triple system, in which a pair of scissors from an outer pair of scissor arms and an intersecting individual Scissor arm exists, these three scissor arms in the Projection of the stroke direction seen closely arranged are.
  • the invention has for its object a scissor lifting system to create for work platforms of the type mentioned at the beginning, at the initial upright and at low Raising heights of the lifting cylinders and the lower scissor packs be relieved.
  • This task is done with a scissor lift system for work platforms of the generic type according to the invention solved that at least one auxiliary cylinder in the stroke direction between two articulation points spreading apart at the stroke is arranged.
  • the usual vertical Erection of the scissor lift of the auxiliary cylinders also acts in this vertical direction, in the first place with less erection far less lifting forces than be applied over the inclined lifting cylinder have to. So even with relatively small auxiliary staff both the lifting cylinder and the lower scissor arms effective relief of the scissor lift, which also reduces the size of the lifting cylinder can. It is understood that the lifting cylinder and the auxiliary cylinder can be controlled synchronously, which is precisely what the first force when lifting the scissor lift important from its lower end position. So it can new scissor mast with six or more on top of each other arranged scissors packages are executed.
  • Such a lifting cylinder can be located underneath Scissors pack can be arranged instead or in addition can also be on the outside of the scissor lift, in particular Auxiliary cylinder between scissors packages further up be provided.
  • Auxiliary cylinder between scissors packages further up be provided.
  • auxiliary cylinder the erection of the scissor mast over the entire Support Aufrichtweg. Because with increasing The ones to be brought up by the lifting cylinder take uprightness Forces that alone in a certain elevation is able to use the forces for the further erection of the Apply scissor mast.
  • Telescopic cylinder can be used for a smaller auxiliary cylinder than the maximum stroke between each other Lay out spreading articulation points on the scissor mast, whereby then the cylinder tube or the piston rod of the concerned Auxiliary cylinder with one of its two articulation points is loosely connected in the stroke direction.
  • Fig. 1 shows in detail a chassis 1 with a support frame 2, on which a scissor lift 3 is arranged.
  • the scissor lift has a work platform at the top 4, between the lower end position and the upper, erected end position of the scissor lift 3 height adjustable is.
  • the scissor lift 3 consists of superimposed, same scissor packs 5, each of pairs of scissor arms 6 with outer scissor arms 7 and inner ones Scissor arms 8 exist.
  • the scissor arms 7 of each pair of scissor arms 6 are congruent seen in the transverse direction to each other and are just such a distance that in between with sufficient play the inner scissor arms 8 are arranged. This results in a scissor lift 3 so-called three-way system, as one particularly in the End view of Fig. 2 sees.
  • the lower ends 9 of the outside Scissor arms 7 of the scissor arm pairs 6 are each articulated with the top ends 10 of the interior Scissor arms 8 are connected, as are 11 at the upper ends the outer scissor arms 7 in between the lower ends 12 of the inner scissor arms 8 articulated.
  • Each half the length of the outer scissor arms 7 are Scissor arm pairs 6 and the inner scissor arms 8 one Scissors package 5 at intersections 13 by means of a inserted axis or the like articulated with each other coupled. How, among other things, at the number of these crossing points 13 recognizes, it is the scissor lift 3 for one that has a total of six Scissor packages 5 is equipped.
  • the main drive for erecting and lowering the scissor lift 3 takes place via a lifting cylinder 14 which on Chassis 1 or support frame 2 at a pivot point 15 in Seen transversely in the middle under the scissor lift 3 is arranged and with its piston rod at a bearing point 16 on the underside of the scissor arm at the bottom 8 attacks.
  • the effective axis of the lifting cylinder 14 takes a very acute angle to this lower, inner one Scissor arm 8, which on the one hand saves overall height, but on the other hand increased lifting forces when lifting the scissor lift 3 required from the lower end position.
  • auxiliary cylinder 17 In the middle under the scissor lift 3 is on the support frame 2 an auxiliary cylinder 17 arranged there at a pivot point 18 is suspended. With its piston rod the auxiliary cylinder 17 engages at an upper articulation point 19 at the bottom of the lowest, inner Scissor arm 8 is located.
  • the direction of action of Auxiliary cylinder 17 lies in the lifting direction of the scissor lift 3, usually in the vertical direction.
  • In order to the direction of action of the auxiliary cylinder 17 is exactly in arranged in the vertical plane in which the hub of the scissor mast 3 crossing points spread apart 13 lie. Unlike the lifting cylinder 14, the only with its smaller force component in the lower one Starting position on the scissor lift 3 attacks, the full effect Force of the auxiliary cylinder 17 in the vertical stroke direction.
  • the auxiliary cylinder 17 supports the initial stroke the scissor lift 3 from its lowered Lay out, and there with increasing righting angle Scissor arms 7, 8 the vertical force component of the lifting cylinder 14 increases, it can rise above a certain level the scissor lift 3 alone the other lifting forces up to the upper end position of the erected scissor lift 3 apply. Therefore it is sufficient if the Auxiliary cylinder 17 only over the initial stroke of the scissor lift 3 is effective, with which the auxiliary cylinder 17th Overall length can be saved.
  • auxiliary cylinders 21 are on the outer sides of the outer Scissor arms 7 of the relevant scissor arm pairs 6 are arranged.
  • These auxiliary cylinders 21 have the same vertical direction of action as the auxiliary cylinder 17, their lower Articulation points 24 are located at the intersection points 13 of the lower pair of scissors 5, while the upper articulation points 23 of the auxiliary cylinder 21 in the area of the crossing points of the upper scissors package 5 are.
  • the piston rods 22 of these auxiliary cylinders 21 also have one Safety gear 25 so that the loose link 23 itself of this from a certain upright height when lifting further can take off. With reverse direction of movement This also ensures that the articulation point 23 again securely in engagement with the respective piston rod 22 of the relevant auxiliary cylinder 21 comes.
  • the two auxiliary cylinders 21 are in the embodiment mirror-symmetrical to each other at the same height of the scissor lift 3 arranged, which is not absolutely necessary is. Basically, both the top auxiliary cylinders 21 and the lower auxiliary cylinder 17 from the in Height direction transverse center plane offset are arranged, the only decisive thing is that the articulation points 18 and 19 for the lower auxiliary cylinder 17 and the articulation points 23 and 24 for the upper auxiliary cylinders 21 itself when erecting the scissor lift 3 in the height direction separate from each other.
  • upper auxiliary cylinder 21 also on the Ends of the scissor arms 7, 8 are provided because themselves there also articulation points with one through the scissor arm ends passed axis are at the corresponding Extension over the outer sides of the outer scissor arms 7 can also be used for the articulation of the auxiliary cylinder 21 can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Sewing Machines And Sewing (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP97122979A 1997-01-14 1997-12-30 Système de levage à ciseaux pour plate-formes de travail Expired - Lifetime EP0854110B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29700496U 1997-01-14
DE29700496U DE29700496U1 (de) 1997-01-14 1997-01-14 Scherenhubsystem für Arbeitsbühnen

Publications (2)

Publication Number Publication Date
EP0854110A1 true EP0854110A1 (fr) 1998-07-22
EP0854110B1 EP0854110B1 (fr) 2003-01-29

Family

ID=8034495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97122979A Expired - Lifetime EP0854110B1 (fr) 1997-01-14 1997-12-30 Système de levage à ciseaux pour plate-formes de travail

Country Status (3)

Country Link
EP (1) EP0854110B1 (fr)
AT (1) ATE231820T1 (fr)
DE (2) DE29700496U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2903974A1 (fr) * 2006-07-19 2008-01-25 Twist Sarl Dispositif autoelevateur mobile et tour de controle le comportant
CN101391733A (zh) * 2008-07-25 2009-03-25 白天海 一种液压式移动升降平台及省力装置
CN101817488A (zh) * 2010-05-18 2010-09-01 高树伟 升降取物车
US8267222B2 (en) 2009-02-05 2012-09-18 Kan Cui Compact scissors lift
CN110154001A (zh) * 2019-06-17 2019-08-23 清华大学 定位机器人

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044969A1 (de) * 2004-09-01 2006-03-02 Hans Balzer Gmbh & Co. Kg Werkstatt- Und Fahrzeugtechnik Personenlift für eine Montagegrube, insbesondere für Kraftfahr- oder Schienenfahrzeuge
CN102862930A (zh) * 2012-09-25 2013-01-09 济南大力神机械制造有限公司 剪叉式升降机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402579A (en) * 1945-05-24 1946-06-25 Weaver Mfg Co Load lifter
US2945551A (en) * 1957-08-05 1960-07-19 Mark H Annin Portable platform elevating device
US3596735A (en) * 1969-10-30 1971-08-03 Howard H Denier Portable elevator working and load-lifting platform
GB1403973A (en) * 1973-09-10 1975-08-28 Mark Ind Scissors lift assembly
US4930598A (en) * 1988-07-25 1990-06-05 501 Sky Climber, Inc. Scissors lift apparatus
EP0640554A1 (fr) * 1993-08-31 1995-03-01 Mayville Engineering Company, Inc. Plate-forme de travail à poutre unique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402579A (en) * 1945-05-24 1946-06-25 Weaver Mfg Co Load lifter
US2945551A (en) * 1957-08-05 1960-07-19 Mark H Annin Portable platform elevating device
US3596735A (en) * 1969-10-30 1971-08-03 Howard H Denier Portable elevator working and load-lifting platform
GB1403973A (en) * 1973-09-10 1975-08-28 Mark Ind Scissors lift assembly
US4930598A (en) * 1988-07-25 1990-06-05 501 Sky Climber, Inc. Scissors lift apparatus
EP0640554A1 (fr) * 1993-08-31 1995-03-01 Mayville Engineering Company, Inc. Plate-forme de travail à poutre unique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2903974A1 (fr) * 2006-07-19 2008-01-25 Twist Sarl Dispositif autoelevateur mobile et tour de controle le comportant
CN101391733A (zh) * 2008-07-25 2009-03-25 白天海 一种液压式移动升降平台及省力装置
US8267222B2 (en) 2009-02-05 2012-09-18 Kan Cui Compact scissors lift
CN101817488A (zh) * 2010-05-18 2010-09-01 高树伟 升降取物车
CN110154001A (zh) * 2019-06-17 2019-08-23 清华大学 定位机器人

Also Published As

Publication number Publication date
EP0854110B1 (fr) 2003-01-29
DE59709226D1 (de) 2003-03-06
ATE231820T1 (de) 2003-02-15
DE29700496U1 (de) 1997-02-20

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