EP0214796A2 - Echafaudage auto-élevant - Google Patents

Echafaudage auto-élevant Download PDF

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Publication number
EP0214796A2
EP0214796A2 EP86306483A EP86306483A EP0214796A2 EP 0214796 A2 EP0214796 A2 EP 0214796A2 EP 86306483 A EP86306483 A EP 86306483A EP 86306483 A EP86306483 A EP 86306483A EP 0214796 A2 EP0214796 A2 EP 0214796A2
Authority
EP
European Patent Office
Prior art keywords
frame member
lowermost
tower
members
frame
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Withdrawn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
EP86306483A
Other languages
German (de)
English (en)
Other versions
EP0214796A3 (fr
Inventor
George Murray
Henry Leo Friel
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 EP0214796A2 publication Critical patent/EP0214796A2/fr
Publication of EP0214796A3 publication Critical patent/EP0214796A3/fr
Withdrawn legal-status Critical Current

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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
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
    • E04G1/22—Scaffolds having a platform on an extensible substructure, e.g. of telescopic type or with lazy-tongs mechanism

Definitions

  • This invention relates to an extendable tower.
  • Scaffolding is frequently used to provide a safe working platform in all forms of above-ground and maintenance work.
  • the scaffolding is required at a location for only a short period of time scaffolding is built up in the form of towers.
  • the tower must be dismantled before being transferred to the new location for reassembly.
  • an extendable tower comprising a plurality of telescopically interconnected frame members, the uppermost frame member being provided with a working platform, means for extending and retracting the tower being provided on the lowermost frame member, and each frame member having corner portions provided with connecting means for slidably engaging an adjacent frame member.
  • each corner portion of the frame member is in the form of an upright elongate connecting member, each frame member being provided with connecting members of a common cross-section.
  • the connecting members may be formed of hollow extrusions of for example, aluminium alloy.
  • the extending and retracting means is in the form of a pulley system, the pulley system being operable from a rotatable handle provided on the lowermost frame member.
  • locking means are provided on the tower to lock the frame members in desired positions relative to one another.
  • the locking means may also be operable to ensure that the frame members are extended and retracted in a desired sequence.
  • the uppermost frame member 1 is provided with a working platform 5 and the lowermost frame member 4 is provided with the winding mechanism 6 of a pulley system 7.
  • Each frame member 1, 2, 3 or 4 defines a cuboid, the upright corner edges of the frame members 1, 2, 3 and 4 being formed by elongate connecting members 8 and the horizontal corner edges being formed by elongate structural horizontal corner edges being formed by elongate structural members 9.
  • the connecting members 8 are in the form of hollow aluminium alloy extrusions the outer edge of which define an approximately rectangular shape in cross section.
  • the end face 10 of the connecting member 8 which forms the outer face of a corner of a frame member 1, 2, 3 or 4 is provided with an undercut groove 11.
  • the opposite end face 12 of the connecting member 8 is provided with a T-shaped protrusion 13.
  • Three shoulders 14, 15 and 16 extend from the protrusion 13 to provide bearing surfaces.
  • the structural members 9 are in the form of hollow rectangular aluminium alloy extrusions.
  • the connecting members 8 are welded to the ends of the structural members 9 such that the lateral axis of each connecting member 8 is positioned at an angle of 45° to the longitudinal axis of each structural member 9, as is shown in Fig. 4.
  • the lengths of the structural members 9 of adjacent frame members 1, 2, 3 or 4 are chosen such that the undercut groove 11 of each connecting member 8 of each frame member 1, 2, 3 or 4 may slidably receive the T-shaped protrusion 13 provided on each connecting member 8 of the next smaller frame member 1, 2, 3 or 4 and is shown by the dotted lines in Fig. 4.
  • the tower is extended and retracted by means of a pulley system 7 which is operated from the winding mechanism 6 provided on the lowermost frame member 4.
  • the winding mechanism is in the form of a circular cross section bar 17 rotatably mounted on the frame member 4 having a winding handle 18 provided at one end and having four winding wheels 19, 20, 21 and 22 mounted thereon.
  • Flexible wire ropes 23, 24, 43 and 44 are wound around and extend from each wheel 19, 20, 21 and 22.
  • the wire ropes 23 and 24 from the inner wheels 19 and 20 extend upwardly to pass over pulley wheels 25 and 26, on an upper end structural member 9, of the frame member 4, and then pass under pulley wheels 27 and 28 on a lower end structural member 9 on the next smaller frame member 3.
  • the ropes 23 and 24 extend upwardly from the pulley wheels 27 and 28 through a similar set of pulley wheels 29 and 31, and 30 and 32, mounted on frame members 2 and 3 to pulley wheels 33 and 34 mounted on an upper end structural member 9 of frame member 2.
  • the ropes 23 and 24 pass over the pulleys 33 and 34 and are attached to a lower end structural member 9 of the uppermost frame member 1.
  • the wire ropes 43 and 44 from the outer wheels 21 and 22 extend horizontally along the side of the frame member 4 over pulley wheels 35 and 36, mounted horizontally on corners 37 and 38 of the frame member 4, and pulley wheels 39 and 40, mounted on the opposite end of the frame member 4 from the winding mechanism 6. From the pulley wheels 39 and 40 the ropes 43 and 44 extend upwards over sets of pulleys similar to those provided at the opposite end of the frame members 1, 2, 3 and 4 for the wire ropes 23 and 24.
  • Locking pins 45 may be passed through pre-drilled holes in the connecting numbers 8 to retain the frame members in the extended position and the locking pins may also be used to permit the frame members 1, 2, 3 and 4 to be extended and retracted in a desired sequence.
  • an extendable tower according to a second embodiment of the present invention comprises four telescopically interconnected frame members 51, 52, 53 and 54.
  • the uppermost frame member 51 is provided with a working platform 55 and the lowermost frame member 54 is provided with the winding mechanism of 56 of a pulley system 57.
  • the frame members 51, 52, 53 and 54 feature transverse members 60 which extend between the connecting members 58 which define the shorter ends of the frame members 51, 52, 53, and 54.
  • the working platform 55 is formed of aluminium checker plate and is provided with a trapdoor 90, for access to the platform 55 from the inside of the frame 51, the platform 53 being reached by means of a telescopic aluminium ladder (not shown).
  • a guard rail 61 is fixed to the frame 51 for the safety of operators on the platform 55.
  • the winding mechanism 56 of the pulley system 57 is in the form of a hand winder 61 and is mounted on the two lowermost transverse members 60A and 60B of the lowermost frame 54. From the winder 61 a wire rope 62 passes upwards over a pulley 63 on the top structural member 59A of the frame 54 then downwards under a pulley 64 on the lower structural member 59B of the frame 53.
  • the rope 62 then passes across to the opposite end of the frames 53 and 54 where it passes through two similar pairs of pulleys 65, 66 and 67, 68 and two pulleys 69 and 70 on the lowermost structural member 59C on the frame 54 and passes back across the frames 53 and 54 to a further pair of pulleys 71 and 72, the end of the rope 62 being fixed to the second lowermost transverse member 60B of the frame 54.
  • the frame 53 is raised.
  • the frame 52 is raised by means of four fixed length wire ropes 73 which pass from each end of the uppermost end structural members 59A and 59D of the frame 54 over pulleys 74 on each end of the uppermost end structural members 59E and 59F of the frame 53 and are fixed to the lowermost end structural members 56G and 59H of the frame 52.
  • the frame 51 is suspended on wire ropes 75 connected to the frame 53 and passing over pulleys 76 on the frame 52 on a similar manner.
  • As a safety measure lock means 77 are provided on the four corners between the lowermost frames 53 and 54 to prevent the collapse of the tower in the event of the wire rope 62 breaking.
  • Wire ropes 78 extend between the ends of the upper connecting members 59 and the lower connecting members 59 of the frame 54.
  • the ropes 78 pass through safety catches 79 mounted on the frame 53. When the rate of movement of the ropes 78 through the catches 79 exceeds a predetermined rate the catches 79 lock against the ropes 78 to prevent the frame 53 from moving further.
  • Stabilisers 80 are provided on the frame 54.
  • the stabiliser 80 are in the form of an roughly triangular shaped frame 81 and are pivotally mounted on pairs of brackets 82 fixed to tubular members 83.
  • the tubular members 83 are fixed to the outer faces of the connecting members 58 of the frame 54.
  • the stabilisers 80 are provided with a length adjustable ground engaging legs 84 which may be locked by means of pins 85.
  • Extension pieces 86 are fitted to the lower ends of the connecting members 58 of the frame 54 and these receive height adjustable support wheel 87, brakes 88 being provided on the wheels 87.
  • the tower is relatively light when compared to steel scaffolds of conventional design.
  • the winder may be driven by an internal combustion or electrical motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Movable Scaffolding (AREA)
EP86306483A 1985-08-22 1986-08-21 Echafaudage auto-élevant Withdrawn EP0214796A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858521101A GB8521101D0 (en) 1985-08-22 1985-08-22 Extendable tower
GB8521101 1985-08-22

Publications (2)

Publication Number Publication Date
EP0214796A2 true EP0214796A2 (fr) 1987-03-18
EP0214796A3 EP0214796A3 (fr) 1988-01-13

Family

ID=10584195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86306483A Withdrawn EP0214796A3 (fr) 1985-08-22 1986-08-21 Echafaudage auto-élevant

Country Status (4)

Country Link
EP (1) EP0214796A3 (fr)
JP (1) JPS6299556A (fr)
AU (1) AU6175786A (fr)
GB (1) GB8521101D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203129A (en) * 1987-02-28 1988-10-12 Dermot Maynes Self raising step ladder
DE9201136U1 (fr) * 1992-01-31 1992-12-03 Goy, Wilhelm, 8881 Haunsheim, De
GB2262931A (en) * 1992-01-02 1993-07-07 John Arthur Roake Extendable tower.
GB2513481A (en) * 2013-03-26 2014-10-29 David Minnis An improved access platform
JP2016003480A (ja) * 2014-06-17 2016-01-12 日綜産業株式会社 足場装置
US10479641B2 (en) 2016-02-24 2019-11-19 Halliburton Energy Services, Inc. Adjustment and repositioning of coiled tubing tensioning device while deployed

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3835818B2 (ja) * 1995-09-12 2006-10-18 朝日リーラック株式会社 枠組足場用先行手摺枠および枠組足場の組立方法
WO2008001435A1 (fr) * 2006-06-28 2008-01-03 Hirata Corporation Corps de structure de châssis et dispositif télescopique
WO2015085419A1 (fr) * 2013-12-09 2015-06-18 Haessler Inc. Plate-forme de travail mobile s'élevant verticalement
JP6844866B2 (ja) * 2019-02-12 2021-03-17 三国屋建設株式会社 伸縮式タワー
CN113882740B (zh) * 2021-10-28 2022-09-06 国网辽宁省电力有限公司盘锦供电公司 一种可快速安装的电力铁塔

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966956A (en) * 1960-02-26 1961-01-03 Moore Corp Lee C Extension tower for use with a fork lift truck
US3000473A (en) * 1958-12-02 1961-09-19 Reynolds Televator Corp Telescoping tower
FR1290621A (fr) * 1961-05-25 1962-04-13 Pont de levage à éléments coulissants
FR2058610A5 (fr) * 1969-09-17 1971-05-28 Chapelle Charles
FR2192062A1 (fr) * 1972-07-17 1974-02-08 Chapelle Charles
FR2294980A2 (fr) * 1972-07-17 1976-07-16 Sicoffe Sarl Elevateur autonome perfectionne
US4225012A (en) * 1979-04-06 1980-09-30 International Telephone And Telegraph Corporation Safety clamp device and apparatus utilizing same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000473A (en) * 1958-12-02 1961-09-19 Reynolds Televator Corp Telescoping tower
US2966956A (en) * 1960-02-26 1961-01-03 Moore Corp Lee C Extension tower for use with a fork lift truck
FR1290621A (fr) * 1961-05-25 1962-04-13 Pont de levage à éléments coulissants
FR2058610A5 (fr) * 1969-09-17 1971-05-28 Chapelle Charles
FR2192062A1 (fr) * 1972-07-17 1974-02-08 Chapelle Charles
FR2294980A2 (fr) * 1972-07-17 1976-07-16 Sicoffe Sarl Elevateur autonome perfectionne
US4225012A (en) * 1979-04-06 1980-09-30 International Telephone And Telegraph Corporation Safety clamp device and apparatus utilizing same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203129A (en) * 1987-02-28 1988-10-12 Dermot Maynes Self raising step ladder
GB2262931A (en) * 1992-01-02 1993-07-07 John Arthur Roake Extendable tower.
DE9201136U1 (fr) * 1992-01-31 1992-12-03 Goy, Wilhelm, 8881 Haunsheim, De
GB2513481A (en) * 2013-03-26 2014-10-29 David Minnis An improved access platform
GB2513481B (en) * 2013-03-26 2020-07-15 Minnis David An improved access platform
JP2016003480A (ja) * 2014-06-17 2016-01-12 日綜産業株式会社 足場装置
US10479641B2 (en) 2016-02-24 2019-11-19 Halliburton Energy Services, Inc. Adjustment and repositioning of coiled tubing tensioning device while deployed

Also Published As

Publication number Publication date
EP0214796A3 (fr) 1988-01-13
GB8521101D0 (en) 1985-09-25
JPS6299556A (ja) 1987-05-09
AU6175786A (en) 1987-02-26

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