EP1185478A1 - Plate-forme de travail - Google Patents

Plate-forme de travail

Info

Publication number
EP1185478A1
EP1185478A1 EP00945632A EP00945632A EP1185478A1 EP 1185478 A1 EP1185478 A1 EP 1185478A1 EP 00945632 A EP00945632 A EP 00945632A EP 00945632 A EP00945632 A EP 00945632A EP 1185478 A1 EP1185478 A1 EP 1185478A1
Authority
EP
European Patent Office
Prior art keywords
scissor arms
pair
scissor
working platform
iii
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
EP00945632A
Other languages
German (de)
English (en)
Other versions
EP1185478B1 (fr
Inventor
Siegfried Winter
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.)
JLG Industries Inc
Original Assignee
Liftlux Potain GmbH
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 Liftlux Potain GmbH filed Critical Liftlux Potain GmbH
Publication of EP1185478A1 publication Critical patent/EP1185478A1/fr
Application granted granted Critical
Publication of EP1185478B1 publication Critical patent/EP1185478B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/22—Lazy-tongs mechanisms
    • 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 working platform which can be extended and retracted via a scissor mechanism with a lower pair of scissor arms which is connected to at least one upper pair of scissor arms arranged above.
  • Such work platforms are known. They are usually arranged on a chassis and can be extended hydraulically at the place of use in order to transport people or objects on the work platform to the desired height.
  • Working platforms with a relatively low working height consist of two pairs of scissor arms, those with large working heights consist of five or more pairs.
  • Working heights of more than 20 meters can be achieved with the latter working platforms, but then there is the problem that the pairs of scissors when folded up reach such a height that the transport height permissible for road transport is reached.
  • the object of the invention is therefore to create a working platform in which the transport height is minimal without having to accept losses in stability and load-bearing capacity.
  • This object is achieved in a working platform which can be extended and retracted via a scissor mechanism with a lower pair of scissor arms, which is connected to at least one upper pair of scissor arms arranged above, in that the upper pair of scissor arms on the inner sides has an outward bevel towards its upper end.
  • This bevel makes it possible for the folded scissor arms to lie on top of one another without forming gaps, so that a minimum transport height can be reached at the maximum working height.
  • An embodiment of the invention is that the bevel is formed by continuously reducing the cross section on the inside of the scissor arms towards the end thereof.
  • the bevel is formed by a slanted end of the scissor arms.
  • the scissor arms are cut off at an angle and a diagonally outward end is attached to the interface.
  • the slanted end of the scissor arms has a smaller cross section than the rest of the scissor arms.
  • bevel increases from a pair of scissor arms to the pair of scissor arms arranged above it.
  • the length of the tapered upper end of the scissor arms increases in relation to the total length of the scissor arms from a pair of scissor arms to the overlying pair of scissor arms.
  • the cross section of the scissor arms it is expedient for the cross section of the scissor arms to decrease from a pair of scissor arms to the overlying pair of scissor arms.
  • the advantages of the invention consist essentially in the fact that even with a cross-section of the scissor arms that is reduced from bottom to top, it is possible for the scissor arms to lie on top of one another in the folded state without space, the cross-section reduction being staggered as desired.
  • the offset resulting from straight profiles of the scissor arms is compensated for by the bevel. This reduces the transport height and the weight of the scissors, or a higher working height is possible with the same transport properties.
  • Fig. 3 shows the individual scissor arms of a work platform according to the invention.
  • the working platform according to the invention is arranged on several pairs of scissor arms 1 which are arranged one above the other and which are arranged in the region of the lower pair of scissor arms I and act on them Hydraulic drive 2 is extendable and foldable.
  • the pairs of scissor arms 1 are each pivotable about a central axis 3 and are connected at their upper end 4 to the lower ends 5 of the pair of scissor arms 1 located above them. This scissor mechanism enables a large working height to be achieved with a relatively low transport height.
  • the upper pairs (II, III, IV and V) of scissor arms 1 have a bevel 8 directed towards the outer side 7 on their upper inner sides 6 towards the upper end 4.
  • This bevel 8 enables the scissor arms 1 to be folded together (FIG. 2) without leaving a space between the scissor arms 1 lying one above the other. A minimum transport height is thus achieved at the maximum working height. Since lower forces have to be absorbed in the area of the upper ends 4 of the scissor arms 1 than in the rest of the area of the scissor arms 1, this beveling 8 can be carried out without loss of stability. For the same reason, the cross section of the scissor arms 1 can be reduced from the bottom up, which leads to a further reduction in weight and transport height.
  • Fig. 3 shows the formation of the scissor arms 1 from the lower pair (I) to the uppermost pair (V). It can be seen that the lower pair (I) has a constant cross section over the entire course.
  • a bevel 8 directed towards the outer side 7 is provided on the upper inner sides 6 towards the upper end 4, i.e. on the upper inside 6 material was removed or the cross-section reduced. The outside 7, however, remains unchanged.
  • the beveling is achieved in that the upper end 4 of the scissor arm 1 is attached to the remaining part of the scissor arm 1 at an angle to the outside 7 of the scissor arm 1.
  • the attached upper end 4 can have a smaller cross section than the rest of the scissor arm 1.
  • the bevel 8 ie the angle between the rest of the scissor arm 1 and the bevelled upper end 4) expediently decrease towards the top, just as the length of the bevelled upper end 4 of the scissor arm 1 increases in relation to the total length of the scissor arm 1.
  • the cross section of the scissor arms 1 decreases from below (I) to above (II, III, IV, V).
  • the bevel 8 ensures that, despite the reduction in the cross section of the scissor arms 1, it is possible for the scissor arms (1) to lie on one another without space, as shown in FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
  • Agricultural Machines (AREA)
  • Pallets (AREA)
  • Vehicle Body Suspensions (AREA)
  • Gloves (AREA)
EP00945632A 1999-06-15 2000-06-15 Plate-forme de travail Expired - Lifetime EP1185478B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19927310A DE19927310C2 (de) 1999-06-15 1999-06-15 Arbeitsbühne
DE19927310 1999-06-15
PCT/DE2000/001893 WO2000076903A1 (fr) 1999-06-15 2000-06-15 Plate-forme de travail

Publications (2)

Publication Number Publication Date
EP1185478A1 true EP1185478A1 (fr) 2002-03-13
EP1185478B1 EP1185478B1 (fr) 2003-04-02

Family

ID=7911335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945632A Expired - Lifetime EP1185478B1 (fr) 1999-06-15 2000-06-15 Plate-forme de travail

Country Status (8)

Country Link
US (1) US6595322B2 (fr)
EP (1) EP1185478B1 (fr)
AT (1) ATE236073T1 (fr)
AU (1) AU771429B2 (fr)
DE (2) DE19927310C2 (fr)
ES (1) ES2194752T3 (fr)
PT (1) PT1185478E (fr)
WO (1) WO2000076903A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2567386C (fr) 2004-05-17 2015-03-17 Allan Pavlick Dispositif et systeme de levage d'un vehicule a moteur
DE102006028946B4 (de) * 2006-06-23 2008-09-04 Camera Dynamics Gmbh Scherenpantograph
CN201598148U (zh) * 2009-02-05 2010-10-06 崔侃 结构紧凑型剪叉式高空作业举升车
US9296596B2 (en) 2012-10-15 2016-03-29 Cameron Lanning Cormack Hybrid wedge jack/scissor lift lifting apparatus and method of operation thereof
CN103224209A (zh) * 2013-04-24 2013-07-31 山东力高升降机械有限公司 升降平台坑洼保护装置
CN111302279A (zh) * 2020-02-19 2020-06-19 南京林业大学 一种楼道安防监控摄像头安装辅助装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US461682A (en) * 1891-10-20 Fire-escape
US552531A (en) * 1896-01-07 Fire-escape
US214224A (en) * 1879-04-08 Improvement in fire-escape ladders
FR608007A (fr) * 1925-12-16 1926-07-13 échelle pliante transportable pour pose de fils aériens ou autres applications
US2862689A (en) * 1955-11-03 1958-12-02 Southworth Machine Co Paper lift
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
US3672104A (en) * 1970-12-23 1972-06-27 Trw Inc Nesting three dimensional lazy tong structure
AU4668572A (en) * 1971-10-14 1974-03-21 Delmar Engineering Laboratories Stress balanced extendible boom structure
US3817346A (en) * 1972-08-21 1974-06-18 D Wehmeyer Mobile scaffolding
US4175644A (en) * 1973-10-15 1979-11-27 Robert Staines Scissors lift
DE3713927A1 (de) * 1987-04-25 1988-11-10 Ernst Langewellpott Scherenhebebuehne
JPH02164653A (ja) * 1988-12-19 1990-06-25 Koichi Nishikawa リンク式リフトを有するターンテーブル型自動車整備装置
US5429210A (en) * 1994-01-21 1995-07-04 Hansen, Deceased; Elmer K. Adjustable height wagon

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0076903A1 *

Also Published As

Publication number Publication date
WO2000076903A1 (fr) 2000-12-21
ATE236073T1 (de) 2003-04-15
DE19927310C2 (de) 2002-12-05
US6595322B2 (en) 2003-07-22
PT1185478E (pt) 2003-08-29
AU771429B2 (en) 2004-03-18
AU5964800A (en) 2001-01-02
EP1185478B1 (fr) 2003-04-02
ES2194752T3 (es) 2003-12-01
DE19927310A1 (de) 2001-11-29
US20020043425A1 (en) 2002-04-18
DE50001627D1 (de) 2003-05-08

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