[go: up one dir, main page]

WO1997015522A1 - Elevateur individuel a cage mobile - Google Patents

Elevateur individuel a cage mobile Download PDF

Info

Publication number
WO1997015522A1
WO1997015522A1 PCT/US1996/016374 US9616374W WO9715522A1 WO 1997015522 A1 WO1997015522 A1 WO 1997015522A1 US 9616374 W US9616374 W US 9616374W WO 9715522 A1 WO9715522 A1 WO 9715522A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
mast
cage assembly
user
movable
Prior art date
Application number
PCT/US1996/016374
Other languages
English (en)
Inventor
David D. White
Alan E. Murphy
Original Assignee
Upright, Inc.
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 Upright, Inc. filed Critical Upright, Inc.
Priority to JP9516636A priority Critical patent/JPH11513651A/ja
Priority to EP96936423A priority patent/EP1007466A1/fr
Publication of WO1997015522A1 publication Critical patent/WO1997015522A1/fr

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

Definitions

  • the present invention relates in general to personnel lifts. More specifically, the invention relates to portable personnel lifts wherein a platform and cage assembly are elevated to working heights of the order of magnitude of 50 feet.
  • a movable platform and cage assembly is provided which provides a ground level entry for the user in its lowermost position and wherein the platform and cage assembly may be lifted relative to the supporting mast at any time to a position above the top of the supporting mast to eliminate work envelope obstructions by the mast.
  • Another aspect of the present invention is an improved cage assembly having a "clamshell" design wherein a portion of the safety cage is simply lifted up out of the way before a user enters the cage. The movable cage portion is held open automatically, allowing the user to enter the cage without stooping and without having to use either hand. The user may step into the cage standing upright and carrying tools or supplies in both hands.
  • the prior art includes multi-stage personnel lifts such as shown in the Neubauer et al U.S. patent 5,337,858 dated August 16, 1994.
  • the Neubauer patent teaches a lift wherein the cage assembly is carried by the last of several cantilevered elevating sections.
  • the platform and cage assembly of this Neubauer patent is raised above the mast as the platform is elevated, the design has an inherent critical flaw. That critical flaw is that the design utilizes a series of cantilevered elevating sections. The use of cantilevered sections places design limits on stability as working heights are steadily increased.
  • Ream et al U.S. patent 4,657,112 dated April 14, 1987 which patent is owned by the assignee of this application.
  • the Ream et al patent discloses a telescoping mast, as opposed to a cantilevered mast.
  • the telescoping mast is inherently capable of reaching much higher working heights than the cantilevered mast.
  • the user of the lift taught in the Ream et al patent must climb higher and higher to enter the cage assembly.
  • the Ream et al patent 4,657,112 shows in Fig. 1 the telescoping mast at its lowermost position. In this position, the user must climb ladder 19 to enter the cage 17.
  • taller and taller lifts are provided, the user must climb taller ladders to enter the cage in its lowermost or retracted position.
  • the prior art includes cage assemblies with fixed upper rails in which the user must stoop to enter (patent 4,657,112); and cage assemblies in which the user must move or lift a mid-level rail to an open position and hold the rail in that position while entering the cage.
  • a lift having the advantageous telescoping mast as taught, for example, in the Ream et al patent 4,657,112 but which has a movable cage assembly which is capable of being lowered to provide a ground level entry for the user and which also provides means for readily lifting the cage assembly to a position above the top of the mast to remove work envelope obstructions and to increase the overall working height obtainable by the lift.
  • One aspect of the present invention is to provide a movable cage assembly for use with a telescoping mast personnel lift which provides ground level entry for the user and which provides means for raising the cage above the top of the mast to eliminate work envelope obstructions by the mast.
  • a further aspect of the invention is to provide a portable personnel lift having a telescoping mast inherently capable of achieving working heights previously unattained in this art and which simultaneously provides ground level entry for the user and eliminates work envelope obstructions by the mast.
  • Another aspect of the invention is to provide a cage assembly having a "clamshell" or pivoting design, affording convenient access to the cage from ground level in that the user need not stoop and may step into the cage without having to grab a rail with either hand.
  • Fig. 1 is a side elevational view of the movable cage assembly according to the invention shown in its retracted or lowermost position in conjunction with a 25 foot telescoping mast;
  • Fig. 2 is a side elevational view of the movable cage Fig. 1 in its elevated position with the assembly shown in movable cage above the top of the mast;
  • Fig. 3 is a perspective view of the movable cage assembly of the present invention shown in its lowermost, retracted position;
  • Fig. 4 is a perspective view of the movable cage assembly and telescoping lift of Fig. 3 as shown in its extended position with the cage above the top of the mast;
  • Fig. 5 is a side elevational view of a second embodiment of the movable cage assembly shown in conjunction with a 48 foot telescoping mast;
  • Fig. 6 is a cross-sectional view of the telescoping mast, substantially as shown in Fig. 3 of U.S. patent 4,657,112;
  • Fig. 7 is a schematic, sectional view showing the rela ⁇ tionship of the lifting mechanism for the telescoping mast along with one type of lift mechanism for the movable cage assembly;
  • Fig. 8 is a schematic representation of another embodiment of a lift mechanism for the movable cage assembly;
  • Fig. 9 is a schematic representation of a third embodiment lift mechanism for the movable cage assembly of the present invention.
  • Fig. 10 is a perspective view showing the clamshell cage assembly in its open, raised position.
  • a movable cage assembly shown generally as 20 is used in conjunction with a portable personnel lift shown generally as 10.
  • the personnel lift 10 has a multi-sectional telescoping mast 50 movable between a lowermost retracted position shown in Fig. 1 and one of many elevated positions such as shown in Fig. 2.
  • the cage assembly In the position shown in Fig. 1, the cage assembly is below the top 51 of mast 50. In this position, the top portion of the mast presents a work envelope obstruction.
  • the work envelope obstruction presented by the mast becomes even more severe as shown in Fig. 5 wherein a much taller lift 110 is shown with a mast 150 capable of reaching a height of 48 feet.
  • a primary goal of the present invention is to provide a movable cage assembly 20 which provides ground level entry as shown in Figs. 1 and 5 but which also provides a cage which may be raised above the top 51 of mast 50 as shown in Figs. 2 and 4.
  • the present invention is capable of use with a telescoping mast 50 which is inherently capable of attaining greater working heights compared with a cantilevered mast design as described above.
  • the design of the mast 50 may be substantially as dis- closed in U.S. patent 4,657,112, which is owned by the assignee of this application and the text of which patent is hereby incorporated by reference.
  • the personnel lift 10 has a base member 11 with wheels 12 at either end of the base member.
  • Outriggers 13 of conventional design each has a vertically adjustable ground engaging member 14 and is attachable to the base member 11 to provide an extended area of support for the unit.
  • a vertical mast 50 extends upwardly.
  • the mast 50 is a telescoping mast having a plurality of telescoping or concentrically mounted sections.
  • the embodiment shown in Figs. 1-6 includes six sections 52,53,54,55,56 and 57.
  • the central mast section is shown as 57.
  • the preferred type of mast used in the present invention is the mast shown in U.S. patent 4,657,112 to Ream et al.
  • Fig. 6 herein includes the mechanism shown in Fig. 3 of patent 4,657,112 and a detailed description of the preferred mast is not repeated here.
  • a fluid operated ram 71 has a cylinder member 73 and piston member 72.
  • a cage support means shown generally as 30 includes an arm 31 carried by the upper end of the innermost mast section 57.
  • a support beam 32 is welded to arm 31. Beam 32 extends downwardly and carries the weight of the movable cage assembly means 20.
  • the movable cage assembly means or safety cage assembly 20 includes a sleeve 21 which slides on support beam 32, and a platform or cage base means 22 on which the user stands, connected rigidly to the base of sleeve 21.
  • Safety cage assembly 20 also has an upper safety rail means 24, which is typically waist to chest high for most users.
  • that phrase means that the upper rail 24 of cage 20 is above the top 51 of mast 50.
  • the mast 50 does not restrict the user from reaching above the mast with tools, instruments, etc.
  • safety cage assembly 20 includes a plurality of rails which form side walls 91 and 92, front wall 93 and rear wall 94.
  • the preferred embodiment shown in Figs. 1, 3 and 10 includes a fixed, mid-level rail 80 which extends horizontally across the rear wall 94 and side walls 91 and 92.
  • Rail 80 includes sections 80a and 80b which extend downwardly along the edges of front wall 93 to the cage base means or platform 22.
  • Upper safety rail means 24 includes sections 24a and 24b which extend along side walls 91 and 92, respectively; and section 24c extending along front wall 93 and section 24d extending along rear wall 94 and pivotally connected to cage support means 30.
  • Upper safety rail means 24 in its lowermost position shown in Fig. 3 forms a generally horizontal rail that extends around and surrounds the user when standing on the platform 22.
  • the front wall 93 of the cage assembly is open, allowing the user to step onto the cage base means or platform 22 without stooping and without having to use either hand.
  • a horizontal, mid-level rail section 85 is connected to upper safety rail means 24 by two vertical rail sections 86 and 87 in front wall 93 and vertical rail sections 88 and 89 in side walls 91 and 92, respectively.
  • Mid-level rail section 85 forms a mid-level enclosure around the user with fixed mid-level rail 80 in the position shown in fig. 3.
  • a gas spring 100 is mounted below rail 24 on mount 101 (Figs. 8 and 9) and is connected to a bellcrank 102 carried by upper rail means 24. The user lowers the upper rail means 24 by pulling it downwardly to its lower, closed position.
  • the fixed mid-level rail 80 carries vertically extending stabilizers 98 and 99 (Fig. 10) positioned on side walls 91 and 92 to resist lateral motion of upper safety rail means 24 in its lower, closed position.
  • the present invention includes various means for raising the cage assembly means 20 relative to cage support means 30.
  • the cage assembly is raised relative to the cage support means 30 sequentially as the mast 50 is elevated.
  • the user may raise the cage assembly 20 relative to the cage support means 30 independently of the elevation of mast 50.
  • Fig. 7 shows one embodiment of the lift means 40 for raising the cage assembly means 20 on its cage support means 30 sequentially as the mast is elevated. In the embodiment shown in Fig.
  • a cage lift chain 41 is provided which extends from a point of attachment at the top of the mast section 56 adjacent to the central mast section 57 and extends over sprockets 42 and 43 carried by arm 31 of cage support means 30 and extends downwardly and is connected to the cage assembly 20 near platform 22.
  • the chain 41 raises the cage assembly 20 relative to support beam 32.
  • cage assembly means 20 is raised sequentially as mast 50 is elevated.
  • Mast 50 must be elevated to its fullest height for the movable cage assembly 20 to be raised to its extreme uppermost position shown in Fig. 2.
  • FIG. 8 shows a second type of lift means 140 for raising the cage assembly means 20 on cage support means 30.
  • a hand powered winch 141 is mounted on the cage assembly 20.
  • the winch handle 142 is rotated by the operator in one direction to raise the cage assembly on its support means 30 and, in the opposite direction, to lower the cage assembly 20 on its support means 30.
  • a chain sprocket 143 is carried at the top of cage support means.
  • the cage lift chain 144 is anchored to the work platform 22 at chain anchor point 145. The other end of cage lift chain 144 extends over the sprocket 143 and around the hand operated winch 141.
  • FIG. 9 A third embodiment of the cage lift means is shown in Fig. 9.
  • the lift means shown generally as 240 comprises a hydraulic cylinder 241 having a rod 242 extending downwardly and connecting to platform 22 by a pin 243.
  • the upper end of cylinder 241 is connected to the cage support means 30 by a pin 244.
  • the cage assembly 20 is lifted upwardly relative to support means 30.
  • the rod 242 is extended out of cylinder 241 to its fully extended position shown in Fig. 9, the cage assembly is moved to its lowermost position relative to the support means 30.
  • other types of cage lift means may be provided for moving the cage assembly relative to its support means 30.
  • a ballscrew assembly may be used in place of the hydraulic cylinder shown in Fig. 9.
  • a ballscrew assembly may be used in place of the hydraulic cylinder shown in Fig. 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Types And Forms Of Lifts (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

L'invention porte sur la cage mobile (20) d'un élévateur individuel de chantier (10) comportant un mât (50) télescopique (50) à plusieurs sections pouvant évoluer entre une position repliée basse où la cage (20) se trouve plus bas que le sommet (51) du mât (50,) et une position déployée où la cage (20) plus haute que le sommet (51) du mât (50) de manière à empêcher que le mât (50) ne forme un obstacle empêchant d'accéder aux travaux. Une poutre (32) supportant la cage (20) repose sur la section centrale (57) du mât (50) et la cage (20) peut se déplacer de part et d'autre de cette poutre (32) entre une position inférieure qui correspond au niveau du sol et à la position repliée du mât (50), et une position supérieure où la cage (20) dépasse le sommet (51) du mât (50). La cage (20) du type double coque est également munie d'un garde fou supérieur de sécurité (24) pivotant entre une position élevée facilitant l'accès à la cage (20) sans que l'utilisateur n'ait à se baisser ou à utiliser ses mains pour la (20) maintenir, et une position abaissée où il se trouve lorsque l'utilisateur (24) l'a ramené vers le bas après avoir pris place dans la cage (20).
PCT/US1996/016374 1995-10-23 1996-10-15 Elevateur individuel a cage mobile WO1997015522A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9516636A JPH11513651A (ja) 1995-10-23 1996-10-15 可動ケージアセンブリを有する人員用リフト
EP96936423A EP1007466A1 (fr) 1995-10-23 1996-10-15 Elevateur individuel a cage mobile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54676495A 1995-10-23 1995-10-23
US08/546,764 1995-10-23

Publications (1)

Publication Number Publication Date
WO1997015522A1 true WO1997015522A1 (fr) 1997-05-01

Family

ID=24181907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/016374 WO1997015522A1 (fr) 1995-10-23 1996-10-15 Elevateur individuel a cage mobile

Country Status (3)

Country Link
EP (1) EP1007466A1 (fr)
JP (1) JPH11513651A (fr)
WO (1) WO1997015522A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1012104A4 (fr) * 1996-09-09 2003-06-11 Crown Equip Corp Vehicule de transport de personnel
EP1657212A3 (fr) * 1997-09-08 2006-08-23 Crown Equipment Corporation Véhicule de transport de personnel
AU2009200043B2 (en) * 2008-12-03 2011-06-30 Jlg Industries, Inc. Work platform
US10060142B2 (en) 2013-12-09 2018-08-28 Haessler Inc. Vertically elevating mobile work platform
WO2018223448A1 (fr) * 2016-08-04 2018-12-13 崔侃 Mécanisme de levage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107226438B (zh) * 2017-07-10 2023-09-29 徐州徐工随车起重机有限公司 隧道检查作业装置
CN110316683A (zh) * 2019-07-18 2019-10-11 佛山科学技术学院 一种升降平台

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632530A (en) * 1950-07-03 1953-03-24 Elmer A Wagner Telescoping tower vehicle
US2965191A (en) * 1955-01-14 1960-12-20 Mccabe Powers Body Company Tower vehicles
US3582137A (en) * 1969-12-12 1971-06-01 Hall Ski Lift Co Inc Footrest for a three-seat ski-lift chair
US4015686A (en) * 1973-01-29 1977-04-05 Bushnell Jr Sherman W Portable multi-stage mechanical list
US4657112A (en) * 1986-04-25 1987-04-14 Up-Right, Inc. Mast construction for pedestal scaffold
WO1992016706A1 (fr) * 1991-03-13 1992-10-01 Skyjack Manufacturing, Inc. Dispositifs elevateurs ameliores de personnes
EP0557685A2 (fr) * 1992-02-28 1993-09-01 Kabushiki Kaisha Aichi Corporation Chariot élévateur aérien compact avec plate-forme déplaçable verticalement
EP0590409A1 (fr) * 1992-10-01 1994-04-06 Josef Alois Huber Dispositif de levage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632530A (en) * 1950-07-03 1953-03-24 Elmer A Wagner Telescoping tower vehicle
US2965191A (en) * 1955-01-14 1960-12-20 Mccabe Powers Body Company Tower vehicles
US3582137A (en) * 1969-12-12 1971-06-01 Hall Ski Lift Co Inc Footrest for a three-seat ski-lift chair
US4015686A (en) * 1973-01-29 1977-04-05 Bushnell Jr Sherman W Portable multi-stage mechanical list
US4657112A (en) * 1986-04-25 1987-04-14 Up-Right, Inc. Mast construction for pedestal scaffold
WO1992016706A1 (fr) * 1991-03-13 1992-10-01 Skyjack Manufacturing, Inc. Dispositifs elevateurs ameliores de personnes
EP0557685A2 (fr) * 1992-02-28 1993-09-01 Kabushiki Kaisha Aichi Corporation Chariot élévateur aérien compact avec plate-forme déplaçable verticalement
EP0590409A1 (fr) * 1992-10-01 1994-04-06 Josef Alois Huber Dispositif de levage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1012104A4 (fr) * 1996-09-09 2003-06-11 Crown Equip Corp Vehicule de transport de personnel
EP1657212A3 (fr) * 1997-09-08 2006-08-23 Crown Equipment Corporation Véhicule de transport de personnel
AU2009200043B2 (en) * 2008-12-03 2011-06-30 Jlg Industries, Inc. Work platform
US8016074B2 (en) 2008-12-03 2011-09-13 Jlg Industries, Inc. Work platform
US10060142B2 (en) 2013-12-09 2018-08-28 Haessler Inc. Vertically elevating mobile work platform
EP3431437A1 (fr) 2013-12-09 2019-01-23 Haessler Inc. Plate-forme de travail mobile s'élevant verticalement
WO2018223448A1 (fr) * 2016-08-04 2018-12-13 崔侃 Mécanisme de levage

Also Published As

Publication number Publication date
EP1007466A1 (fr) 2000-06-14
JPH11513651A (ja) 1999-11-24

Similar Documents

Publication Publication Date Title
US5803204A (en) Personnel lift with clamshell cage assembly
US7395900B2 (en) Portable wheelchair lift
US6688426B1 (en) Wheel extension and lift device for ladders
US20090152045A1 (en) Mobile mount for attachment of a fall arrest system
US6405831B1 (en) Mobile lift unit
US5392878A (en) Bulk material load vehicle access system
US4657112A (en) Mast construction for pedestal scaffold
EP0070312B1 (fr) Appareil de levage pourvu d'une echelle
US2798652A (en) Mobile ladders and platforms
US4458785A (en) Lift
US9109394B2 (en) Adjustable ladder support mechanism
US4094381A (en) Aerial extension ladder
US5645395A (en) Building crane apparatus climbable on building walls
US20080105497A1 (en) AccessTower
US5481988A (en) Telescoping work platform
US4598795A (en) Ladder hoist attachment
WO1997015522A1 (fr) Elevateur individuel a cage mobile
KR102719540B1 (ko) 접이식 고소 작업대
CA1077919A (fr) Plate-forme d'accrochage mobile pour tige de forage
EP2116669A1 (fr) Ensemble de support de matériel
JP5291513B2 (ja) 昇降式移動足場
US5551528A (en) Stepladder with lifting assembly
GB2211237A (en) Support platform
US20070267249A1 (en) Roof safety system
JPH08100517A (ja) 昇降式作業台

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
ENP Entry into the national phase

Ref country code: JP

Ref document number: 1997 516636

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: 1996936423

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1996936423

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1996936423

Country of ref document: EP