EP0094297A1 - Bewegliches Hängegerüst, Struktur und Verfahren zum Versetzen eines derartigen Gerüsts - Google Patents

Bewegliches Hängegerüst, Struktur und Verfahren zum Versetzen eines derartigen Gerüsts Download PDF

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Publication number
EP0094297A1
EP0094297A1 EP83400879A EP83400879A EP0094297A1 EP 0094297 A1 EP0094297 A1 EP 0094297A1 EP 83400879 A EP83400879 A EP 83400879A EP 83400879 A EP83400879 A EP 83400879A EP 0094297 A1 EP0094297 A1 EP 0094297A1
Authority
EP
European Patent Office
Prior art keywords
nacelle
cables
distance
ties
entry
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Withdrawn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
EP83400879A
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English (en)
French (fr)
Inventor
Daniel Gautier
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 EP0094297A1 publication Critical patent/EP0094297A1/de
Withdrawn legal-status Critical Current

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    • 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
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/22—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by roofs or ceilings
    • 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
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms

Definitions

  • the invention relates to a nacelle movable relative to a structure and in particular a system for horizontal displacement in two perpendicular, transverse and longitudinal directions, of a suspended nacelle, for cleaning and / or painting of a frame, in particular metallic.
  • a rolling scaffold is generally used which is moved on the ground over the entire surface of the building, in order to allow the treatment of all parts of the frame.
  • Such a system makes it imperative to completely free up the floor space of the building on which the scaffolding moves, in particular for buildings in service, which requires manpower, leads to loss of time, and therefore of money. , both for the personnel treating the frame and for the owner of the building, without taking into account the drawbacks that result for the latter.
  • This material essentially consists of a nacelle suspended via cables on an upper rail, with means allowing its displacement vertically by the clearance of the cables, and horizontally thanks to the upper rail, in the vertical plane of the facade to be treated. .
  • a frame and in particular a metal frame, generally consists of trusses resting on pillars, the lower part of each truss being constituted by a bar or purlins arranged horizontally, the struts or purlins being parallel and at a distance n the one from the other in the direction of alignment of the trusses, or transverse direction x of the frame.
  • the invention proposes to use a suspended nacelle, with simple and reliable horizontal movement system in two perpendicular directions, one transverse.x confused with the direction of alignment of the trusses, the other longitudinal confused there with the direction in which is placed (e) each entry or breakdown.
  • the nacelle essentially consists of a rectangular platform with railings and peripheral protective mesh.
  • the invention relates to a nacelle movable relative to a structure comprising substantially parallel ties or the like, for example a frame, characterized in that said nacelle comprises four cables of variable length provided at their ends with means for hooking to said ties and connected at four points on the platform defining a quadrilateral and additional retaining means, of given length, capable of being fixed in a removable manner between said nacelle and a chosen point of said structure.
  • the aforementioned additional retaining means will preferably be constituted by two rigid poles, each pole end being provided with hooking means.
  • the poles can be easily hung on neighboring ties, while they will be fixed at their lower ends to anchor points provided on the nacelle.
  • each cable is preferably terminated by a rigid part defining the hook by which it can be fixed to the ties and this rigid part is provided long enough so that it can easily be grasped from the nacelle and hung or unhooked from the ties.
  • the control of the four suspension cables allowing the vertical movement of the nacelle is ensured by four electric motors whose power cable is supported by hooks placed on entry or failure as the nacelle progresses in one direction or in the 'other.
  • the four motors are fixed on the platform so that, in the direction x of spacing of the ties or breakdowns, the cables, at this platform, are spaced from p as it was said previously. It has also been said that at the time of the first maneuver, the nacelle is suspended at a distance m from the struts or purlins on two struts transversely distant by a year and that, during the two maneuvers, the cables must be able to be unhooked easily from the nacelle .
  • the system according to the invention is further characterized in that the distance m is chosen to be equal to the average size of a man, the distance p between suspension cables at the level of the platform being between (a-1) .n and year
  • the rigid poles are used to cause the displacement of the nacelle by rotation around their anchoring point on the ties or purlins.
  • the nacelle it is necessary to have anchoring points on the platform.
  • the platform must be stable regardless of the position of the people working on its surface.
  • the system according to the invention is also remarkable in that the outputs of the four suspension cables of the nacelle are located at the four corners of the platform which comprises, at these outputs, anchoring devices for the poles.
  • the poles have a useful length greater than the length of the suspension cables when the nacelle is at a distance m from the ties or purlins, and we have specified that the movement maneuvers are carried out under the control of the suspension cables.
  • the system according to the invention is also remarkable in that, during the first movement maneuver over a distance n / 2, the two rigid poles are anchored on the anchoring devices platform at the outputs of the two suspension cables located on the part considered to be the platform front in the direction of the desired movement, and cause, by controlled relaxation of the suspension cables, a lateral movement of the nacelle lined with downward movement until the suspension cables from the rear of the platform reach a length equal to that of the poles, the latter, during the second movement maneuver over the same distance n / 2, being anchored on the platform anchoring devices at the outputs of the two suspension cables located on the rear part of the platform, and causing, by controlled tensioning of the suspension cables, a lateral movement of the nacelle coupled with an upward movement up to 'that the suspension cables reach a length such that the nacelle is at a distance m from struts or purlins.
  • the nacelle 2 has been shown in FIG. 1 in the form of a platform, its components - such as railings, protective mesh - being known components which therefore do not form part of the invention.
  • At the four corners of the platform are fixed four electric motors 21, 22, 23, 24 for driving four suspension cables 31, 32, 33 and 34.
  • Each cable is wound on a mandrel coupled to the axis of the corresponding motor.
  • the nacelle is suspended under a framework, in particular metallic, composed of trusses resting on pillars, the lower part of each truss being constituted by a bar or purlins arranged horizontally, the struts or purlins being parallel and at a distance n the one from the other in the direction of alignment of the trusses, or transverse direction x of the frame.
  • a framework in particular metallic, composed of trusses resting on pillars, the lower part of each truss being constituted by a bar or purlins arranged horizontally, the struts or purlins being parallel and at a distance n the one from the other in the direction of alignment of the trusses, or transverse direction x of the frame.
  • a framework in particular metallic, composed of trusses resting on pillars, the lower part of each truss being constituted by a bar or purlins arranged horizontally, the struts or purlins being parallel
  • the free ends of the suspension cables are hooked at four points on the frame on two cross sections spaced apart by an "a (an integer of course).
  • the anchoring links are distant from 2.n; these are connections 12 and 14, this arrangement allowing the person working in the nacelle to conveniently clean and / or paint the connection 13 and the other components of the farm of which it forms the lower part, taking account of the dimensions frame standard which will be specified later and the dimension of the platform in the direction x which is chosen between n and 2n in this case.
  • the end of the suspension cables 31, 32, 33 and 34 is constituted by a rigid part ending in a hook, respectively 311, 321, 331 and 341, the function of which will be specified in the following, as well as the length r .
  • x ′ see FIG. 1
  • the entry 12 is called the front entry and the entry 14 is called the rear entry.
  • Cables 31 and 32 are the front cables and cables 33 and 34 are the rear cables.
  • the nacelle being initially on the ground and resting on four wheels (not shown), any appropriate equipment is used to anchor the hooks of the rigid parts of the four suspension cables to the struts 12 and 14, at points 121, 122 and 141, 142 .
  • the nacelle is then hoisted by the movement of the suspension cables driven by the electric motors, until the platform is at the distance from the ties or breakdowns which is suitable for the work to be carried out.
  • FIG. 2a we will now refer to FIG. 2a to explain the first maneuver intended to advance the nacelle by a distance n / 2.
  • the nacelle is in the position shown in solid lines, at distance m from the ties 111 to 141, suspended by its suspension cables on the ties 12 and 14.
  • the assembly is shown in side view so that only the cables 31 and 34 and the anchoring points 121 and 141 are visible.
  • the rigid poles (only, the pole 41 is visible) were anchored as shown in FIG. 1.
  • FIG. 2a makes it possible to determine the useful length of the poles 41 and 42.
  • this length 1 will be equal to , which gives, in the more general case of a distance a between anchoring sections, a value 1 equal to .
  • This length is not critical since the distance m can vary within certain limits without major inconvenience for the work to be performed.
  • the nacelle therefore being in the position shown in solid lines in FIG. 2a, a detent movement of the four suspension cables is controlled so that this nacelle, guided in its downward movement by the poles rotating around their anchoring points 111 and 112 ( Figure 1), is brought into the position shown in dotted lines in Figure 2a.
  • the nacelle In this position, the nacelle is in equilibrium, the length reached by the rear suspension cables (33 and 34) is equal to that of the poles, the maneuver having brought about a displacement of the nacelle over a distance equal to n / 2.
  • the dimension of the platform in the direction x is slightly smaller than 2n, distance between anchoring straps of the suspension cables; it will be noted that, as a result, the length of the front suspension cables, at the end of the first maneuver, is shorter than that of the rear suspension cables.
  • the nacelle When the nacelle has been brought into the position shown in dotted lines in FIG. 2a, it is suspended in the equilibrium position by the poles anchored on its front part and by the rear suspension cables; it is therefore possible to unhook the suspension cables before their anchor point on the link 12 to hang them at the anchor points of the two poles on the link 11, by slightly relaxing them in the case of a platform of dimension p less than 2n (or year), in the proportions shown.
  • the poles can then be unhooked, the nacelle being suspended in the low position by its four suspension cables, then hung so as to "double" the rear suspension cables, the nacelle being always suspended in the low position, but the cables rear suspension can then be removed to be hung on the entry 13 or fourth entry (only, the anchor point 131 is visible in Figures 2a and 2b).
  • the nacelle is then in the position and under the conditions shown in solid lines in FIG. 2b.
  • the end of the suspension cables is constituted by a rigid part (311, 321, 331 and 341 in FIG. 1) allowing the cables to be unhooked easily, from the nacelle, during the two movement maneuvers.
  • the length r of this rigid part will, in principle, be determined empirically, and its length r will be specified later with the other dimensions of the assembly produced which will be defined by way of example.
  • the nacelle being in the position shown in solid lines in FIG. 2b, a tension movement of the four suspension cables is controlled so that this nacelle, guided in its upward movement by the poles rotating around their anchoring points 141 and 142 ( Figure 1), is brought into the position shown in dotted lines in Figure 2b.
  • the nacelle In this position, the nacelle is in equilibrium at distance m from the ties or breakdowns, the maneuver having caused it to move over a distance equal to n / 2.
  • the poles can then be unhooked, and the nacelle is found in the position and under the conditions represented in FIG. 3, which corresponds to a displacement of n from its initial position. It is then possible to treat the line 121 and the components of the farm of which this entry constitutes the lower part.
  • the movement of the nacelle in the direction y can be done by means of driving wheels placed in the ties, the displacement system according to the invention then being used only for displacement in the x direction.
  • a nacelle produced in accordance with the invention comprises a platform whose length is 5m in the y direction and whose width is 2.40m in the x direction.
  • the nacelle is or is brought to approximately 1.80 m (distance m) from the ties or purlins, and, for a standardized distance of 1.50m between these ties or purlins, the rigid poles a length of around 2.60m.
  • the ends of the poles are constituted by hooks whose dimensions are adapted to the standardized dimensions of the ties or purlins, and the ends of the suspension cables are in fact constituted by independent rods, these rods ending, at each end, by a hook , and the cables being provided with an anchoring device in the hooks of the lower ends of the rods.
  • a length r of the rods of 1m allows easy unhooking of the suspension cables, from the nacelle, during the two displacement maneuvers.
  • the platform has a 1.10m high railing and a double exterior railing with protective mesh; it is equipped with four electric motors of 500 kg force, with dual control brakes in the event of a power failure.
  • the reduction of the motors is important enough for the maneuvering of raising and lowering of the nacelle can be carried out by controlling its horizontality "on judgment".
  • a safety system using two mercury contactors perpendicular to each other may be provided to automatically cut the power to the motors as soon as the nacelle tilts beyond a certain angle and oblige the operator to correct the tilt.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Movable Scaffolding (AREA)
EP83400879A 1982-05-11 1983-05-03 Bewegliches Hängegerüst, Struktur und Verfahren zum Versetzen eines derartigen Gerüsts Withdrawn EP0094297A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8208742A FR2526840A1 (fr) 1982-05-11 1982-05-11 Nacelle a deplacement tri-directionnel pour toute intervention sur charpente, notamment metallique
FR8208742 1982-05-11

Publications (1)

Publication Number Publication Date
EP0094297A1 true EP0094297A1 (de) 1983-11-16

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EP83400879A Withdrawn EP0094297A1 (de) 1982-05-11 1983-05-03 Bewegliches Hängegerüst, Struktur und Verfahren zum Versetzen eines derartigen Gerüsts

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EP (1) EP0094297A1 (de)
FR (1) FR2526840A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226169A2 (de) * 1985-12-11 1987-06-24 Przedsiebiorstwo Robot Izolacyjnych Arbeitsbühne
US4696135A (en) * 1986-03-25 1987-09-29 Custodis-Cottrell, Inc. Method and apparatus for constructing towers
WO1995023053A1 (en) * 1994-02-28 1995-08-31 Mcdonnell Douglas Corporation Tendon suspended platform robot
FR2763619A1 (fr) * 1997-05-20 1998-11-27 Frederic Buchmann Procede d'installation d'une structure utilisee pour effectuer des travaux sous plafond eleve
US9393972B2 (en) 2012-05-09 2016-07-19 Wabtec Holding Corp. Modular support frame for railway vehicle equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930441A (en) * 1957-05-31 1960-03-29 Ida L Lacy Traveling scaffold
US3394776A (en) * 1967-03-22 1968-07-30 Wye Delta Equipment Corp Suspended traveling scaffold
US3524520A (en) * 1968-08-29 1970-08-18 Paul J Tidwell Traveling scaffold

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930441A (en) * 1957-05-31 1960-03-29 Ida L Lacy Traveling scaffold
US3394776A (en) * 1967-03-22 1968-07-30 Wye Delta Equipment Corp Suspended traveling scaffold
US3524520A (en) * 1968-08-29 1970-08-18 Paul J Tidwell Traveling scaffold

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226169A2 (de) * 1985-12-11 1987-06-24 Przedsiebiorstwo Robot Izolacyjnych Arbeitsbühne
EP0226169A3 (de) * 1985-12-11 1988-09-07 Przedsiebiorstwo Robot Izolacyjnych Arbeitsbühne
US4696135A (en) * 1986-03-25 1987-09-29 Custodis-Cottrell, Inc. Method and apparatus for constructing towers
WO1995023053A1 (en) * 1994-02-28 1995-08-31 Mcdonnell Douglas Corporation Tendon suspended platform robot
US5585707A (en) * 1994-02-28 1996-12-17 Mcdonnell Douglas Corporation Tendon suspended platform robot
FR2763619A1 (fr) * 1997-05-20 1998-11-27 Frederic Buchmann Procede d'installation d'une structure utilisee pour effectuer des travaux sous plafond eleve
US9393972B2 (en) 2012-05-09 2016-07-19 Wabtec Holding Corp. Modular support frame for railway vehicle equipment

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Publication number Publication date
FR2526840A1 (fr) 1983-11-18
FR2526840B1 (de) 1985-01-18

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