EP0831054A2 - Dispositif de levage, en particulier plate-forme à ciseaux - Google Patents

Dispositif de levage, en particulier plate-forme à ciseaux Download PDF

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Publication number
EP0831054A2
EP0831054A2 EP97114304A EP97114304A EP0831054A2 EP 0831054 A2 EP0831054 A2 EP 0831054A2 EP 97114304 A EP97114304 A EP 97114304A EP 97114304 A EP97114304 A EP 97114304A EP 0831054 A2 EP0831054 A2 EP 0831054A2
Authority
EP
European Patent Office
Prior art keywords
platform
lifting device
chassis
gear
protective
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Withdrawn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
EP97114304A
Other languages
German (de)
English (en)
Other versions
EP0831054A3 (fr
Inventor
Richard Baauw
Leo Van Ham
Jerry W. Kist
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.)
Mbb Forder- und Hebesysteme GmbH
Original Assignee
Mbb Forder- und Hebesysteme 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
Priority claimed from DE19647908A external-priority patent/DE19647908A1/de
Application filed by Mbb Forder- und Hebesysteme GmbH filed Critical Mbb Forder- und Hebesysteme GmbH
Publication of EP0831054A2 publication Critical patent/EP0831054A2/fr
Publication of EP0831054A3 publication Critical patent/EP0831054A3/fr
Withdrawn legal-status Critical Current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 lifting device, in particular a Scissor lift, according to the preamble of claim 1.
  • a large number of lifting devices are from the prior art known of the above type.
  • a platform of which forms a work platform via a lifting device, namely a scissor gear, is connected to a chassis.
  • a lifting device namely a scissor gear
  • the platform can be extended opposite the chassis as well as retractable.
  • Such lifting devices are usually extended Condition of the platform from one to the same and therefore on move the person on the work platform.
  • the lifting device when moving the same cannot tip over with the platform extended. So under other be guaranteed that the lifting device even then not toppling over when inadvertently into a floor opening moves.
  • Known scissor lifting devices however, only insufficient protection against accidental Overturn.
  • the present invention has the problem based on a lifting device with sufficient protection against accidental To topple the same.
  • the lifting device according to the invention the features of claim 1.
  • the platform ensures that the lifting device is stabilized in your position. For example, is approaching the lifting device when moving a floor opening, so sits as a result of limited ground clearance of the chassis the lifting device on the floor. A run-in of the same into the bottom opening is avoided.
  • the lifting device is in front secured against accidental overturning.
  • At least one protective bracket is pivotally mounted on the chassis, to reduce the ground clearance of the chassis is pivotable.
  • Protection bar automatically when extending and retracting the platform pivotable. This ensures that the ground clearance the lifting device with the platform extended is always reduced. Incorrect operation is impossible.
  • a lifting device is a scissor lift. This is for indoor use as well as for outdoor use suitable.
  • the scissor lift can both be retracted State as well as in the extended state by an operator be moved.
  • a scissor lift 10 has a chassis 11 and a platform 12 on, chassis 11 and platform 12 by a scissor gear 13 are interconnected.
  • the platform 12 forms a working platform. With the help of the scissors gear 13 Platform 12 and thus the working platform opposite the chassis 11 extendable and retractable in the vertical direction.
  • the extension height the platform 12 is here by an operator individually adjustable.
  • the chassis 11 of the scissor lift 10 has wheels 14. With the wheels 14, the scissor lift 10 is on a floor covering. The ground clearance of the scissor lift 10 results from the distance between this flooring and a bottom wall 15 of the Chassis 11.
  • Chassis 11 On both sides a pivotally mounted on this Means or element, namely a protective bracket 16, assigned. There are thus two protective bars 16, which are the same are trained.
  • the platform 12 is in the extended state the protective bracket 16 in an area below the bottom wall 15 of the chassis 11 pivoted (Fig. 2, 5). This will in extended state of the platform 12, the ground clearance of the Chassis 11 reduced.
  • the protective bracket 16 is in an area above the bottom wall 15 of the chassis 11 pivots (Fig. 3). The total ground clearance of the scissor lift 10 is in this case Approved.
  • the protective bar 16 can be either manually or automatically be pivoted. Each guard 16 is by its own Arrangement articulated to the chassis 11. An actuation of the two arrangements can both together (synchronously) as well as independently. The two arrangements are essentially the same. The arrangement of a Protection bracket 16 on the chassis 11 for automatic pivoting the same depending on the position of the Platform 12 is described in more detail below with reference to FIGS. 2 to 5 explained.
  • the protective bracket 16 is pivotally mounted on the chassis 11.
  • the protective bracket 16 is at its ends 17 with a Disk 18 firmly connected, which can be rotated via a bearing pin 19 and thus pivotable on a side plate 20 of the chassis 11 is attached.
  • the bearing pin 19 is by a nut 21 secured against unwanted loosening.
  • the disc 18 carries a projection 22.
  • the projection 22 is standing in engagement with a first gear element 23 of a conversion gear 24.
  • This first gear element 23 is in common with a second gear element 25 on the side plate 20 of the Chassis 11 rotatably and thus pivotally mounted.
  • the swiveling one Bearing of the gear elements 23, 25 on the side plate 20 of the chassis 11 takes over another bearing pin 26.
  • On a projection 22 of the disk 18 facing The end of the first gear element 23 has the same Recess 27.
  • the recess 27 of the first gear element 23 has a larger dimension than the projection 22 of the Disc 18. In this respect, the projection 22 is with play within the recess 27 arranged.
  • the freedom of movement of the first gear element 23 and the second Gear element 25 is not only due to the common storage limited to the bearing pin 26, but also by the connection the same by a spring element 28.
  • the spring element 28 accordingly connects the first gear element 23 to the second Gear element 25 and prevents the free movement of the first Gear element 23 in the direction of the bottom wall 15. In the opposite Direction is the free pivotability of the first Gear element 23 by one of the second gear element 25 assigned stop 29 limited.
  • the spring element 28 is connected to the first gear element 23 and the second gear element 25 via projections assigned to it 30, 31 connected.
  • the stop 29 is by welding firmly connected to the second gear element 25.
  • the second gear element 25 is through a third gear element 32 connected to an actuator 33.
  • gear element 32 is on second gear element 25 on the one hand and on the actuator 33 on the other hand.
  • Bearing bolts 34, 35 take over the bearing of the third gear element 32 on the actuator 33 and second gear element 25.
  • the third gear element 32 in adjustable in length.
  • the actuator 33 has an actuator pin 36, at the end 37 a guide element 38 for a lower one Scissor arm 39 of the scissor gear 13 is attached.
  • a guide element 38 for a lower one Scissor arm 39 of the scissor gear 13 is attached.
  • the lower scissor arm 39 of the scissors gear 13 on the actuating pin 36 of the actuating member 33 and pushes it down. this happens against a spring force exerted by a spring element 40.
  • the spring element 40 is arranged in a sleeve 41, into which the actuating bolt 36 has an end 37 protrudes opposite end 42.
  • the protective bracket 16 is dependent of the retraction and extension movements of the Platform 12 can be pivoted automatically. How the Device is described as follows:
  • each protective bracket 16 only one conversion gear 24 assigned, namely at one end of the same. At the other The end of the protective bracket 16 is then only locked.
  • the actuator 33 is a switching element 45 assigned.
  • a switch 46 of the switching element 45 keys the Position of the actuator 33 and thus the platform 12 from.
  • the switch 46 of the switching element 45 comes here at one Counterpart 47 of the actuator 33 to the system, the one has the corresponding contour.
  • switching status of switching element 45 can perform various processes in Controlled connection with the handling of the scissor lift 10 will. Among other things, the operator can be shown whether the guard 16 in an area below or is pivoted above the bottom wall 15 of the chassis 11.
  • FIGS. 2 to 5 it is a purely mechanical design principle around lifting devices against accidental tipping over to protect.
  • An exemplary embodiment is a hydraulic-mechanical construction principle described for a so-called fall protection.
  • the protective bars 50 are below a bottom wall 51 of the chassis 11 arranged and via swivel joints 52 on the bottom wall 51 stored. Axes of rotation of the rotary joints 52 run parallel to a longitudinal central axis of the chassis 11.
  • the protective brackets 50 according to FIG. 6 In the extended state the platform 12 of the scissor lift 10 are the protective brackets 50 according to FIG. 6 to reduce the ground clearance of the undercarriage 11 pivoted.
  • the protective bars 50 according to FIG. 7 are in one plane pivoted parallel to the bottom wall 51 immediately below the same. In this case, the ground clearance of the undercarriage 11 released.
  • a hydraulic cylinder serves to pivot the protective bracket 50 53 and a conversion gear 54.
  • the hydraulic cylinder 53 and the conversion gear 54 are above the bottom wall 51 of the Chassis 11 arranged. Only the protective bar 50 and the Pivots 52 are positioned below bottom wall 51. As a result, hydraulic cylinder 53 and conversion gear 54 are in front Damage protected.
  • the hydraulic cylinder 53 acts as Drive the pivoting of the protective bracket 50.
  • the hydraulic cylinder 53 is connected to the platform by means not shown 12 coupled. Both when entering and exiting the platform becomes the hydraulic cylinder 53 through this Means not shown automatically controlled, then a Swivel the protective bracket 50 to effect.
  • the conversion gear 54 sets the entry and exit movement a piston 55 of the hydraulic cylinder 53 in the pivoting movement the guard 50 um.
  • the conversion gearbox has this 54 via two mounted on a common rod 56 Sliding elements 57.
  • the sliding elements 57 are on the one hand together and on the other hand with the piston 55 of the hydraulic cylinder 53 connected by a knee joint 58.
  • Each sliding member is 57 in addition, each via a lever 59 with one each Guard 50 connected.
  • the piston is in the retracted state of the platform 12 (FIG. 7) 55 of the hydraulic cylinder 53 retracted.
  • the protective brackets 50 are thus pivoted in such a way that the ground clearance of the chassis 11 is released is.
  • the device described above or the one described above Relocation gear 54 is preferably at both ends of each Protection bracket 50 arranged. However, it is only on one side the protective bracket 50 a hydraulic cylinder is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Ladders (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP97114304A 1996-09-19 1997-08-19 Dispositif de levage, en particulier plate-forme à ciseaux Withdrawn EP0831054A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19638247 1996-09-19
DE19638247 1996-09-19
DE19647908 1996-11-20
DE19647908A DE19647908A1 (de) 1996-09-19 1996-11-20 Hubvorrichtung, insbesondere Scherenbühne

Publications (2)

Publication Number Publication Date
EP0831054A2 true EP0831054A2 (fr) 1998-03-25
EP0831054A3 EP0831054A3 (fr) 1999-06-16

Family

ID=26029544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97114304A Withdrawn EP0831054A3 (fr) 1996-09-19 1997-08-19 Dispositif de levage, en particulier plate-forme à ciseaux

Country Status (1)

Country Link
EP (1) EP0831054A3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3035099A1 (fr) * 2015-04-18 2016-10-21 Haulotte Group Nacelle elevatrice a protection contre les nids de poule
CN107902610A (zh) * 2017-12-15 2018-04-13 国网山东省电力公司龙口市供电公司 一种电力线路架设用举升装置
CN114044474A (zh) * 2021-11-30 2022-02-15 国网河南省电力公司卢氏县供电公司 一种安全防护型电力维修装置
CN118123770A (zh) * 2024-05-08 2024-06-04 西安航空学院 一种飞机维修工作架

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE471064C (de) * 1927-10-08 1929-02-05 Hans Haeusler Verstellbares Montagegeruest
FR1017580A (fr) * 1950-03-17 1952-12-12 Plate-forme de travail réglable en hauteur
US2929517A (en) * 1957-06-10 1960-03-22 John R Phillips Stabilizer assembly for heavy construction equipment
EP0464290A1 (fr) * 1989-04-11 1992-01-08 Movietech, (Societe A Responsabilite Limitee) Plate-forme élévatrice mobile constituant un support pour une caméra
NL9100720A (nl) * 1991-04-25 1992-11-16 Stichting Unyjack De Van een schaarconstructie voorziene hefinrichting.
EP0630854A1 (fr) * 1993-06-22 1994-12-28 Japanic Corporation Mécanisme pour déplacer un véhicule latéralement
US5439343A (en) * 1993-04-13 1995-08-08 Watson; Jeff Mini boom bumper

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE471064C (de) * 1927-10-08 1929-02-05 Hans Haeusler Verstellbares Montagegeruest
FR1017580A (fr) * 1950-03-17 1952-12-12 Plate-forme de travail réglable en hauteur
US2929517A (en) * 1957-06-10 1960-03-22 John R Phillips Stabilizer assembly for heavy construction equipment
EP0464290A1 (fr) * 1989-04-11 1992-01-08 Movietech, (Societe A Responsabilite Limitee) Plate-forme élévatrice mobile constituant un support pour une caméra
NL9100720A (nl) * 1991-04-25 1992-11-16 Stichting Unyjack De Van een schaarconstructie voorziene hefinrichting.
US5439343A (en) * 1993-04-13 1995-08-08 Watson; Jeff Mini boom bumper
EP0630854A1 (fr) * 1993-06-22 1994-12-28 Japanic Corporation Mécanisme pour déplacer un véhicule latéralement

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3035099A1 (fr) * 2015-04-18 2016-10-21 Haulotte Group Nacelle elevatrice a protection contre les nids de poule
WO2016170255A1 (fr) 2015-04-18 2016-10-27 Haulotte Group Nacelle elevatrice a protection contre les nids de poule
CN107531471A (zh) * 2015-04-18 2018-01-02 欧历胜集团 抗坑洼的高空工作平台
CN107531471B (zh) * 2015-04-18 2019-08-09 欧历胜集团 抗坑洼的高空工作平台
AU2016252094B2 (en) * 2015-04-18 2020-04-02 Haulotte Group Anti-pothole aerial work platform
US10676334B2 (en) 2015-04-18 2020-06-09 Haulotte Group Anti-pothole aerial work platform
CN107902610A (zh) * 2017-12-15 2018-04-13 国网山东省电力公司龙口市供电公司 一种电力线路架设用举升装置
CN114044474A (zh) * 2021-11-30 2022-02-15 国网河南省电力公司卢氏县供电公司 一种安全防护型电力维修装置
CN118123770A (zh) * 2024-05-08 2024-06-04 西安航空学院 一种飞机维修工作架

Also Published As

Publication number Publication date
EP0831054A3 (fr) 1999-06-16

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