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WO1997008407A1 - Element de suspension pour plate-forme de travail - Google Patents

Element de suspension pour plate-forme de travail Download PDF

Info

Publication number
WO1997008407A1
WO1997008407A1 PCT/SE1996/001048 SE9601048W WO9708407A1 WO 1997008407 A1 WO1997008407 A1 WO 1997008407A1 SE 9601048 W SE9601048 W SE 9601048W WO 9708407 A1 WO9708407 A1 WO 9708407A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling
bridge
cradle
centre portion
mast
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.)
Ceased
Application number
PCT/SE1996/001048
Other languages
English (en)
Inventor
Sven-Erik Wiklund
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.)
Alimak AB
Original Assignee
Alimak AB
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 Alimak AB filed Critical Alimak AB
Priority to AU68417/96A priority Critical patent/AU6841796A/en
Publication of WO1997008407A1 publication Critical patent/WO1997008407A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
    • E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong

Definitions

  • the invention relates to a suspension member in a work platform, having a motor-driven lift bridge, for connecting two sections of the bridge with a centre portion, which is drivable along a vertical mast and carries a drive unit for driving the centre portion and the bridge sections connected thereto along the mast.
  • the invention is intended to be used in a work platform, having a plurality of masts, especially in a twin mast structure, i e a twin mast platform, having two spaced vertical masts, carrying a centre portion each.
  • Such work platforms have been known for quite a long time. Generally they are dismountable but they may be permanently installed, as well, and may be utilized in various fields, primarily in the building industry, however, for conveying materials and the staff to a desired work level, at which the work in question is to be done, such as the installation or the repair of windows in a building, or other kinds of facade works.
  • each centre portion provided for and carried by each mast, each centre portion having a drive unit, comprising one or more drive motors and a drive chain for transmitting the drive power to a tooth gear, engaging a corresponding tooth rack of the mast in order to drive the centre portion upwardly or downwardly, in dependence of rotary direction, along the mast.
  • each centre portion is equipped with guide and bearing rolls spaced from each other for rolling on the corresponding guide and bearing races of the respective mast.
  • a bridge including a number of connected sections, each of which being comprised of a lower supporting frame work and a floor portion, supported by the frame work.
  • a bridge portion extends generally horizontally from each side of the mast and each bridge portion may consist of a number of joined sections.
  • a span extends between adjacent masts and is connected to the corresponding centre portions of the masts.
  • a bridge portion extends from each of the extreme masts as a continuation of the span at the other side of the mast in question.
  • peripheral equipment such as control equipment for controlling the drive means and safety devices, such as guard rails and catches, releasing at critical speeds, load sensors and limit switches, which stop the drive at a critical load and the power supply to the motors upon reaching the limit positions of the bridge, respectively.
  • safety devices such as guard rails and catches, releasing at critical speeds, load sensors and limit switches, which stop the drive at a critical load and the power supply to the motors upon reaching the limit positions of the bridge, respectively.
  • a levelling device is provided as a further safety provision, which keeps the bridge in an essentially horizontal position.
  • the object of the invention is to provide a solution, which reduces the load of the bearing means of the work platform, thereby extending the endurance and reducing the need of maintenance and repair.
  • Fig 1 is a schematically drawn, front elevational view of a work platform in accordance with the invention
  • Fig 2 is a side elevational view of the platform of fig 1
  • Fig 3 is a top view of the work platform of figs 1 and 2
  • Fig 4 is a top view at a larger scale of a coupling cradle of the invention comprised in the system, and
  • Fig 5 illustrates at a larger scale the coupling cradle of fig 4 mounted between two platform sections.
  • Fig 1 shows a work platform 1, having two centre portions 3, each of which being drivable along a vertical mast.
  • the centre portions comprise drive means 7, including motor(s) and a gear train, which at the end has a gear wheel in engagement with a straight tooth rack, connected to a respective mast, thereby driving the centre portion 3 upwardly and downwardly along the mast 5 in dependence of the drive direction of the motor(s) .
  • the essentially rigid centre portion 3 surrounds three sides of the mast 5 and comprises guide rolls rolling on bearing races of the mast 5 in order to resist the horizontal forces which are derived from the load moments of the different parts of the work platform 1.
  • the bridge which is supported by masts 5 and centre portions 3, is constituted by a central span 9, extending between the masts and being composed of four sections in this case, and wings 11, 11', each protruding from respective mast and in this case consisting of one single section 10.
  • Each of the sections is made up of a lattice structure supporting a floor and racks 13.
  • At the end of each section connecting members are provided for connection to corresponding connecting members of the centre portion 3 or of an adjacent section 10.
  • the wings 11, 11' may consist of more than one section 10 and the central span 9 may consist of more or less sections 10 than shown in the drawings.
  • these sections have two upper beams, lying essentially in a horizontal plane, and on which the floor rests, and a lower beam located in the middle between the upper beams.
  • the beams are united by struts, thus providing a rigid lattice structure.
  • Figs 4 and 5 illustrates at a larger scale the particular support structure, used in accordance with the invention for reducing the load of the bearing means and the guide rolls of the platform.
  • this structure consists of a coupling cradle 15 having a central beam 17, which is generally parallel to the sections 10 of the work bridge, when assembled.
  • a central beam 17 In the middle of the central beam there is a bore 19 for a pivot, rigidly associated with the centre portion. The axis of the bore 19 is perpendicular to the logitudinal extension of the central beam 17.
  • Two parallel upper coupling beams 21, 21' are rigidly associated with the upper face of the central beam 17 and extend transversely thereto.
  • Each coupling beam has a couple of coupling lugs 22, 22' for bolting to corresponding coupling lugs, provided at the upper beams of the sections to be connected to the coupling cradle 15.
  • the coupling cradle has the shape of an H.
  • a rigidifying spacing strut 24 is provided at the end of the coupling beams 21, 21' . This strut is not absolutely necessary, but merely an advisable feature. More struts or other rigidifying means may be provided for stabilizing the coupling cradle 15.
  • the coupling of the coupling cradle 15 to the bridge sections 10 is particularly well shown in fig 5.
  • the cradle is disposed on a pivot, which is attached to depending coupling flanges 25 or analogous members of the centre portion 3, in which bores 27 are provided for recieving the pivot.
  • said pivot extends in a horizontal plane, transversely to the longitudinal direction of the bridge, the coupling cradle 15 being rotatable without any restrictions about the pivot.
  • the complete bridge will aligne itself in correspondence to kind of load. Since the moments emanating from the load (dead load + useful load) of the wings counteract the moment derived from the load of the central span, in total, the required lateral forces, which are generated by the guide and bearing rolls against the bearing races of the mast, will be significantly reduced. Thereby the wear will be significantly reduced, resulting in a longer endurance.
  • the centre portion of the invention may also be used in a single mast structure.
  • the mechanism has to be blocked for preventing an excessive rotary motion about the single pivot.
  • excessive rotary motions automatically will be prevented due to the geometrical design of the structure, having two spaced pivots.
  • conventional control and safety devices are provided for controlling the drive and for preventing the occurence of dangerous occasions.
  • the inventive structure comprises a conventional levelling device, keeping the bridge generally horizontal in use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne une plate-forme de travail ayant une partie centrale pouvant coulisser le long d'un mât vertical et des ponts (10) d'une manière générale horizontaux (10) placés de chaque côté du centre. Lesdits ponts (10) sont reliés à ladite partie centrale par un élément de suspension (15). Ledit élément de suspension (15) est un berceau de couplage (15), qui peut pivoter autour d'un pivot, associé rigidement à ladite partie centrale. Ce pivot s'étend d'une manière générale transversalement à la longueur des ponts (10). Ces ponts (10) sont couplés au berceau de couplage (15) par l'intermédiaire d'éléments de couplage (22, 22': 23, 23') qui y sont fixés. Le berceau de couplage comprend un alésage (19) grâce auquel ledit berceau peut pivoter sur le pivot de la partie centrale.
PCT/SE1996/001048 1995-08-23 1996-08-23 Element de suspension pour plate-forme de travail Ceased WO1997008407A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU68417/96A AU6841796A (en) 1995-08-23 1996-08-23 A suspension member in a work platform

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9502924-5 1995-08-23
SE9502924A SE504806C2 (sv) 1995-08-23 1995-08-23 Upphängningselement för arbetsplattform-kopplingsvagga

Publications (1)

Publication Number Publication Date
WO1997008407A1 true WO1997008407A1 (fr) 1997-03-06

Family

ID=20399258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/001048 Ceased WO1997008407A1 (fr) 1995-08-23 1996-08-23 Element de suspension pour plate-forme de travail

Country Status (3)

Country Link
AU (1) AU6841796A (fr)
SE (1) SE504806C2 (fr)
WO (1) WO1997008407A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998046517A1 (fr) * 1997-04-11 1998-10-22 Hek Manufacturing B.V. Plateforme de travail elevatrice
WO2009111875A1 (fr) * 2008-03-11 2009-09-17 Hydro Mobile Inc. Ensemble plateforme élévatrice
GB2499834A (en) * 2012-03-01 2013-09-04 Martin Pownall Transporter platform with base plate and cage for attachment to a hydraulic arm

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624544A1 (fr) * 1993-04-14 1994-11-17 Hek Manufacturing B.V. Plate-forme réglable en hauteur
WO1995023265A1 (fr) * 1994-02-23 1995-08-31 Butler J Frank Echafaudage modulaire

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624544A1 (fr) * 1993-04-14 1994-11-17 Hek Manufacturing B.V. Plate-forme réglable en hauteur
WO1995023265A1 (fr) * 1994-02-23 1995-08-31 Butler J Frank Echafaudage modulaire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998046517A1 (fr) * 1997-04-11 1998-10-22 Hek Manufacturing B.V. Plateforme de travail elevatrice
WO2009111875A1 (fr) * 2008-03-11 2009-09-17 Hydro Mobile Inc. Ensemble plateforme élévatrice
US8544604B2 (en) 2008-03-11 2013-10-01 Hydro Mobile Inc. Elevating platform assembly
GB2499834A (en) * 2012-03-01 2013-09-04 Martin Pownall Transporter platform with base plate and cage for attachment to a hydraulic arm

Also Published As

Publication number Publication date
AU6841796A (en) 1997-03-19
SE9502924D0 (sv) 1995-08-23
SE504806C2 (sv) 1997-04-28
SE9502924L (sv) 1997-02-24

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