EP1995393A2 - Arbeitsplattform - Google Patents

Arbeitsplattform Download PDF

Info

Publication number
EP1995393A2
EP1995393A2 EP08009426A EP08009426A EP1995393A2 EP 1995393 A2 EP1995393 A2 EP 1995393A2 EP 08009426 A EP08009426 A EP 08009426A EP 08009426 A EP08009426 A EP 08009426A EP 1995393 A2 EP1995393 A2 EP 1995393A2
Authority
EP
European Patent Office
Prior art keywords
work platform
platform
platform unit
unit
drive
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Withdrawn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
EP08009426A
Other languages
English (en)
French (fr)
Inventor
Terence Nolan
Thomas O`Neill
Dominic Martin
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.)
Individual
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 EP1995393A2 publication Critical patent/EP1995393A2/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • E04G1/28—Scaffolds primarily resting on the ground designed to provide support only at a low height
    • 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
    • E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
    • 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
    • E04G1/34—Scaffold constructions able to be folded in prismatic or flat parts or able to be turned down
    • 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
    • E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
    • E04G2001/242—Scaffolds movable on wheels or tracks

Definitions

  • the invention relates to a movable working platform which can be used to perform a range of tasks at an elevated height such as various construction, repair, decoration, cleaning, warehousing or library tasks.
  • Some platforms are drivable platforms and have an on-board driving system that allows a user to move the platform while in position on it, other platforms are not drivable and require the user to dismount the platform in order to move it.
  • the on board driving systems of drivable platforms include components such as batteries and electrics.
  • the electric and battery components pose a high risk of sparking and therefore make the platforms unsuitable for use in areas where there is a high risk of explosion e.g. in areas containing flammable gasses.
  • the electric and battery components greatly increase the weight of the drivable platform, making the platform unsuitable for use in weight restricted areas. Also, the increased weight of such platforms makes them difficult to transport. These heavy drivable platforms require a transporting vehicle or else must be disassembled and re-assembled, when being moved from one site to the next. There are numerous parts which can be easily lost during these operations. In addition, if the unit is assembled by non-skilled workers the assembly may not be completed correctly leading to major safety concerns.
  • This invention is directed towards providing a work platform which will address at least some of these problems.
  • a work platform unit comprising:-
  • the drivable, steerable platform unit is foldable this enables the work platform unit to be transported without having to be disassembled.
  • the platform may be manually driven using the manual drive, this eliminates the need for batteries and electric components and permits the platform unit to be used in areas where there is a high risk of explosion.
  • the absence of batteries and electric components makes the platform unit lighter thereby allowing it to be used in weight restricted areas.
  • the platform is height adjustably mounted to the side support.
  • the safety rail is attached to the platform so that the safety rail moves in conjunction with the platform during height adjustment.
  • height adjustment means is provided between the platform and side support.
  • the adjustment means may comprise a plurality of support locators spaced-apart on the support for engagement with corresponding platform locators.
  • the movable support may provide an access ladder to the work platform.
  • the manual drive is operable by a user located on the platform of the work platform unit.
  • the manual drive is operated by a pedal.
  • the manual drive is operated by a pedal, wherein pedalling the pedal may pull a chain around a sprocket which in turn rotates a drive wheel which drives the work platform unit.
  • the manual drive is attached to the work platform so that it moves with the platform.
  • the manual drive further comprises a free wheel mechanism between the sprocket and the drive wheel.
  • the unit comprises a brake.
  • the bottom frame is extendable.
  • the bottom frame may comprise at least one telescopic member.
  • the bottom frame may comprise two telescopic members.
  • the safety rail is foldable.
  • a work platform unit 1 comprises a bottom frame 2 carrying wheels.
  • a pair of smaller front wheels or castors 6, 7 which are mounted on adjustable extension arms 8, 9 which can be telescoped as illustrated to extend the footprint of the unit and thereby improve stability, in use.
  • a separate front wheel 10 which is steerable and drivable as will be described in more detail below.
  • the work platform unit 1 also comprises a front side support 12 and a rear side support 13 which both extend from the bottom frame 2.
  • a working platform 20 is carried horizontally by the front and rear supports 12, 13.
  • the platform 20 is surrounded on all sides by safety rails 21 which are carried by the platform 20 so that the safety rails are retained in position as the platform 20 is raised or lowered.
  • the safety rail system includes a closable access gate 22.
  • the rear support 13 comprises a pair of side members 25, 26 with a series of cross members 27 extending therebetween to define an on-board ladder for user access to and from the platform 20. It will be noted that the rear support 13 is pivotally mounted at its low end by sleeves 28 to a bottom frame member 29 and also pivotally mounted at its upper end by sleeves 30 to a platform member 31 to facilitate movement of the rear support 13 as the platform is raised and lowered.
  • the front side supports 12 have rearwardly extending arms 12B which are pivotally attached by a pivot 12A to the base 2.
  • the ends of the supports 12 have a spigot 12C which engages in a socket 12D on the base 2.
  • a locking pin 12E is used to lock the upright 12 to the base 2.
  • the front support 12 comprises a pair of uprights 40 which are interconnected at their upper end by a connecting cross piece 41.
  • the uprights 40 have a plurality of spaced-apart location projections 45, the projections 45 from one upright being aligned with and facing the projections from the opposite upright.
  • the projections 45 define fixed discrete heights at which the platform 20 can be set.
  • the platform 20 has a pair of depending lugs 50, each with a semi-circular cut-out 51 at each end for engagement, as illustrated, with pairs of adjacent projections 45 on each upright 40.
  • a range of heights to which the platform 20 can be set is illustrated particularly in Figs. 1 , 3 , 4 and 12 to 17 .
  • the depending lugs may take the form shown in Figures 7A and 7B .
  • the depending lugs 700 as shown in Figure 7A and Figure 7B comprise a first, hooked, end 702 and a second, stepped, end 704.
  • the first, hooked, end 702 further comprises a locking mechanism 708.
  • the first, hooked, end 702 is hooked around one of the projections 45.
  • the second stepped end 704 engages another projection 45, as shown in Figures 7A and 7B .
  • the depending lug 700 is locked in place by locking the locking mechanism 708, as shown in Figure 7B .
  • the steerable and drivable wheel 10 is operated as follows. In use, pressing a pedal 86 causes a pedal ladder 90 to move upwards.
  • Upper and lower movement sleeves 66, 64 are attached to the pedal ladder 90, and as the ladder 90 moves upward the sleeves 66, 64 also move upward.
  • the sleeves 64, 66 are on a steering axle 67.
  • the lower movement sleeve 64 operates as follows.
  • An outer housing of the sleeve 64 contains a top and bottom bearings 55, 56 ( Fig. 5B ).
  • Axle 67 has an elongate vertical opening 57B large enough to allow a rod fixing guide 57 to pass through.
  • the rod fixing guide 57 is attached to a chain rod 58 through a rod bushing 59 using two screws 59a.
  • the rod bushing 59 keeps the chain rod 58 concentric with the steering axle 67.
  • the bottom bearing 56 contacts the rod fixing guide 57 and moves it up.
  • the rod fixing guide 57 in turn moves the chain rod 58 up and this causes the wheel 82 to rotate.
  • the steering axle 67 can rotate within the lower movement sleeve 64, whilst the pedal ladder 90 remains fixed.
  • the steering axle 67 has a telescoping top section 68 and a steering handle 69.
  • the wheel 10 is attached to the lower end of the steering axle 67.
  • the steering handle 69 When in motion, if the steering handle 69 is rotated the drive wheel 10 is rotated and changes the direction of rotation. By turning the wheel through 180 degrees a reverse motion is achieved.
  • the chain rod 58 Concentric with the steering axle 67 is the chain rod 58, the upper end of which is connected to the rod fixing guide 57, the lower end of which is attached to a chain 83.
  • the other end of the chain 83 is attached to a spring 80.
  • the chain 83 is trained around a sprocket 82 and the other end of the chain is in turn attached to a housing 60 by means of the spring 80 ( Fig. 5G ). Moving the lower sleeve 64 upwards causes the chain rod 58 to move upwards which pulls the chain 83 around the sprocket 82 which in turn rotates the drive wheel 10.
  • the drive ladder 90 is attached at 91 to the lower sleeve 64.
  • the ladder 90 also has the upper sleeve 66 at its upper end.
  • the drive ladder 90 has short horizontal cylindrical projections 95 spaced equally along its length for engaging with an arm 86A of the pedal 86.
  • the projections 95 on the ladder 90 are at the same spacing as the projections 45 on the front frame 12 so that the pedal 86 can engage at each of the different heights of the platform 12.
  • the pedal 86 engages with the projections 95 ( Fig. 6 ). Moving the pedal 86 downwards rotates it about the pivot and causes the drive ladder 90 to slide upwards along the steering axle 67 and thereby rotates the drive wheel.
  • the bushing 59 is attached to the top of the drive rod 58.
  • the bushing 59 keeps the rod 58 concentric with the steering axle 67.
  • Extending through a slot 57A in the bushing 59 is a key 57 which projects through a long slot 57B in the steering axle 67.
  • the slot 57B is sufficiently long to allow the key 57 to move a distance greater than the stroke of each pedal 86 movement.
  • the lower sleeve 64 has an internal diameter sufficient to provide clearance between the outer face of the key 57 and its inner surface.
  • the top and bottom bearings 55, 56 allow the steering axle 67 to rotate within the housing and also contact the key 57 and move it up along the shaft if the sleeve 64 is moved upwards. This provides a permanent connection between the pedal ladder 90 and the rod 58 while also allowing the steering axle 67 to rotate.
  • a toggle clamp 85 is attached to a stud 85A on the housing 60 and locked. This raises the housing 60 by compressing a spring 61. This facilitates moving the platform manually.
  • the steering handle 69 can be adjusted to a number of positions which correspond to the different heights of the platform.
  • the handle 69 is adjusted by removing the pin from receiving hole 69B and telescoping the top section 68 into the steering axle/shaft 67 to give the correct height and then reinserting the pin 69A.
  • a brake actuator 105 [ Fig. 4 ] is connected by means of a cable 5B to the brake rod 5 through a lever 5A.
  • a cable 5B Moving the handle on the brake actuator 105 pulls the cable 5B which is attached to one end of the lever 5A, which pivots and presses the ends of brake rod 5 against the outer circumference of the wheels 3 and 4, providing a braking mechanism.
  • Folding is accomplished as follows.
  • the handrail 21A is first raised slightly and 21B is pivoted towards the front frame 12 sufficient to allow the handrail 21A to pivot downwards to rest parallel and in contact with cross member 21C.
  • Arm 21B is then pivoted to be parallel to cross member 21C and on top of handrail 21A.
  • the assembly 21 is lifted up sufficient to clear the sockets 21E.
  • the assembly 21 is then pivoted to rest parallel and in contact with cross member 21C.
  • the assembly 21 can then be pivoted about 21D until the handrails are horizontal and as shown. Referring especially to Figs. 1A, 1B and 1C releasing the locking pins 12E allows the front frame 12 to be pivoted into a horizontal position about the pivot 12A.
  • the unit is now in the folded configuration illustrated in Fig. 10 .
  • the platform unit of the invention is a foldable, height adjustable, one piece drivable work platform.
  • the unit can be one piece, light weight (typically can be readily lifted by two people), compact - can fit in a transporter van.
  • the handrails move with the platform.
  • the unit When assembled, the unit can fit through a doorway.
  • a telescoping steering shaft allows the steering handle to be lowered part of the way down as the platform is lowered.
  • the unit also has an improved braking system.
  • the unit has an improved means of operating the drive which allows the pedal to be operated at a lower platform level.
EP08009426A 2007-05-23 2008-05-22 Arbeitsplattform Withdrawn EP1995393A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE20070375 2007-05-23

Publications (1)

Publication Number Publication Date
EP1995393A2 true EP1995393A2 (de) 2008-11-26

Family

ID=39711057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08009426A Withdrawn EP1995393A2 (de) 2007-05-23 2008-05-22 Arbeitsplattform

Country Status (1)

Country Link
EP (1) EP1995393A2 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013175151A1 (fr) * 2012-05-25 2013-11-28 M.B.H. Developpement Plateforme roulante motorisee notamment pour la realisation de travaux interieurs
CN107419889A (zh) * 2017-06-24 2017-12-01 浙江省二建建设集团有限公司 室内屋顶施工用操作平台
CN108049619A (zh) * 2017-12-09 2018-05-18 广州金辉建设集团有限公司 一种升降工作平台
CN109866192A (zh) * 2017-12-05 2019-06-11 北京韩建集团有限公司 施工现场快速组装模板存放架
EP3567002A1 (de) * 2018-04-27 2019-11-13 Sami Järvelä Hebebühne
GB2580290A (en) * 2018-10-30 2020-07-22 Werner Uk Sales & Distrib Ltd A podium
CN114439203A (zh) * 2021-12-29 2022-05-06 中车长江车辆有限公司 一种空轨检修平台
EP4063607A1 (de) * 2021-03-23 2022-09-28 Hymer Leichtmetallbau GmbH & Co. KG Fahrbares steiggerät mit einem bremssystem

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013175151A1 (fr) * 2012-05-25 2013-11-28 M.B.H. Developpement Plateforme roulante motorisee notamment pour la realisation de travaux interieurs
FR2990973A1 (fr) * 2012-05-25 2013-11-29 Mbh Dev Plateforme roulante motorisee notamment pour la realisation de travaux interieurs
CN107419889A (zh) * 2017-06-24 2017-12-01 浙江省二建建设集团有限公司 室内屋顶施工用操作平台
CN109866192A (zh) * 2017-12-05 2019-06-11 北京韩建集团有限公司 施工现场快速组装模板存放架
CN108049619A (zh) * 2017-12-09 2018-05-18 广州金辉建设集团有限公司 一种升降工作平台
CN108049619B (zh) * 2017-12-09 2019-11-15 广州金辉建设集团有限公司 一种升降工作平台
EP3567002A1 (de) * 2018-04-27 2019-11-13 Sami Järvelä Hebebühne
GB2580290A (en) * 2018-10-30 2020-07-22 Werner Uk Sales & Distrib Ltd A podium
GB2580290B (en) * 2018-10-30 2022-11-16 Werner Uk Sales & Distrib Ltd A podium
EP4063607A1 (de) * 2021-03-23 2022-09-28 Hymer Leichtmetallbau GmbH & Co. KG Fahrbares steiggerät mit einem bremssystem
CN114439203A (zh) * 2021-12-29 2022-05-06 中车长江车辆有限公司 一种空轨检修平台

Similar Documents

Publication Publication Date Title
EP1995393A2 (de) Arbeitsplattform
US6533707B2 (en) Folding mechanism for an exercise treadmill
US7097406B1 (en) Wheel skate
EP2289603B1 (de) Elliptische Trainingsvorrichtung
JP6827056B2 (ja) 階段移動装置及び階段移動方法
US20090111666A1 (en) Folding mechanism for a handrail frame assembly of a treadmill
US20030004037A1 (en) Rope type folding mechanism for an exercise treadmill
CA2246854A1 (en) Transporting device
CN1672880A (zh) 可折叠的滚行支撑台架
JP2009299371A (ja) 昇降台装置
JP6109386B1 (ja) 作用形態を多様化できるホイールドーリー
US6402161B1 (en) Portable stair-climbing load transporting dolly
CN112340652A (zh) 一种铠装开关柜电流互感器更换专用小车
CN112158287A (zh) 一种电动代步车
US4911263A (en) Ambulatory ladder
EP0125551A2 (de) Tragbarer, gelenkiger Hubwagen zum Erleichtern des Radwechselns von Reisebussen, Lastkraftwagen, Schleppern und ähnlichen Kraftfahrzeugen
CN214044700U (zh) 一种铠装开关柜电流互感器更换专用小车
KR100693138B1 (ko) 전동차 차체 받침대
KR19990067820A (ko) 휠돌리
CN109532982B (zh) 推车
CN113235892A (zh) 一种安全性高伸缩式建筑施工用脚手架
CN111645747A (zh) 一种手推车的折叠把手
CN219325223U (zh) 翻转操作装置及翻转操作系统
CN212605187U (zh) 一种市政装修用水泥推车
KR200381030Y1 (ko) 계단 승강용 캐리어

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20111201