FR2651820A1 - SCAFFOLD WITH TELESCOPIC DEVELOPMENT FOR ALL WORK AT HIGH HEIGHT. - Google Patents

Abstract

The telescopically developing transportable scaffolding is remarkable in that it comprises a supporting structure (SP) with a stabilizing base (3) and / or running means (4), which is constituted by a rigid framework (OR) containing all the elements necessary for the development of the scaffolding and having on two opposite sides sliding guide uprights (6) for each element (ET) to be developed by means of appropriate control means arranged on the supporting structure, on extensions- guides (7) and on telescopic elements; a guided work platform (PM) with controlled sliding relative to the telescopic elements itself being controlled by any means.

Description

The invention relates to a scaffolding with development

  telescopic for all high works.

  We know different types of scaffolding and other lifting devices used for work at height and on large surfaces (facades,

  naval repair, cleaning of large buildings).

  Among these devices include the aerial work platforms mounted on vehicles. These materials are very quick to implement but their use is limited to punctual interventions and on narrow surfaces because of their capacity (size, load of the nacelle) reduced. In addition, the high cost of the machines

limits their use.

  Mobile scaffolds are also used as spacer tubular elements from a wheel base and stabilizers, but these scaffolds are limited in height and do not allow work over a large area. There are also so-called "flying" bridges, that is to say, suspended at the top of the surfaces to be treated. These laborious placement devices are valid for vertical and smooth surfaces only. In case of major advances (balconies, billboards, various offsets), the necessary offset does not allow a

work safely.

  Heavy scaffolds are still used with difficult and dangerous handling elements that must be tied every six meters or so, making these systems unsuitable for repetitive movements in a minimum of time. As for light scaffolds whose tubular framework is supported on the ground and front, they consist of a large number of structural elements and connection whose assembly is long, requires a relatively large staff and is dangerous for both

  editors only for the environment, especially in urban areas.

  According to the invention, it was desired to produce a more efficient equipment, that is to say ensuring a fast and safe work with maximum safety to users, on a large surface to be treated without having to dismantle the equipment. It has also been sought to reduce the manufacturing cost, the implementation time, the space requirement and

  maintenance of equipment, thereby improving productivity.

  For this purpose and according to a first characteristic, the transportable scaffolding with telescopic development comprises a support structure with stabilizing base and / or rolling means, which is constituted by a rigid frame containing all the elements necessary for the development of the scaffolding and having the following two opposite sides of the sliding guide posts for each element to be developed by means of appreciably arranged control means arranged on the supporting structure on extension rods and on the telescopic elements; a working gateway with controlled sliding relative to the elements

  telescopic being itself controlled by any means.

  According to other characteristics, the carrying structure has one or more axles and a removable drawbar to be towed by a vehicle; the support structure is arranged to receive stabilizing feet adjustable in height and laterally; the load-bearing structure is equipped for the transport of construction equipment and to be ballasted if necessary; the supporting structure is designed to

  receive flat telescopic elements.

  Other features are also in the fact that the telescopable elements are omega section and joined together by bolted plates and counter plates, said elements also being assembled to longitudinal spacers serving as support for intermediate platforms. According to other features, the mobile bridge is at several levels of work and guided sliding by four rollers associated with the telescopable elements; the said bridge being equipped with a lock to

  automatic engagement in the telescopic elements.

  These and other features

  will emerge from the rest of the description.

  To fix the object of the invention without however limiting it, in the accompanying drawings: FIG. 1 is a perspective view of a

  scaffolding according to an exemplary embodiment.

  FIG. 2 is a front view of the scaffolding according to FIG. 1 represented while gripping a

telescopic element.

  FIG. 3 is a view similar to FIG. 2 showing the scaffolding during the lifting of the two

first telescopable elements.

  Figures 4 and 5 are respectively views of

  Lace and side of a load bearing structure with two axles.

  FIG. 6 is a side view illustrating the installation of a first telescopable element on a structure

rolling carrier.

  FIG. 7 is a side view illustrating the installation of a second telescopable element on a structure

carrier with stabilizing feet.

  Figure 8 is a partial view to larger

  scale illustrating the mobile bridge in position.

  locked on the telescopic elements.

  FIG. 9 is a partial view on a larger scale showing the locking device of the

bridge.

  FIG. 10 is a sectional view considered according to

line 10-10 of Figure 9.

  Fig. 11 is a sectional view showing the

  rolling guidance of the bridge.

  In order to make the object of the invention more concrete, it is now described in non-limiting forms of

  embodiment illustrated in the figures of the drawings.

  The scaffold according to the invention is constituted by a CSP carrier structure) which is formed of a rigid frame (OR) forming a parallelepiped frame by its profiled elements. The structure is dimensioned to allow the flat storage of numerous telescopic elements (ET) which are composed of end panels (1) interconnected by spacers (2) also forming barriers and capable of

  receive between them a work platform.

  The support structure also has at each end stabilizing feet (3) adjustable vertically and laterally by any known means and completed either by support pads or by steerable wheels, in order to have the scaffold level according to the configuration of the ground

(Figures 1, 2, 3).

  The structure can still be equipped with one or more axles (4) and a removable drawbar (5) to allow the transport of the scaffolding by a towing vehicle (FIGS.

4, 5, 6).

  It should also be noted that the load-bearing structure can also be fitted with a floor, one or more compartments, caissons or bins, for receiving equipment from

  site or a ballast product if necessary.

  According to its two longitudinal sides, the supporting structure has two uprights (6) projecting above and with profiled section for the sliding guide of the telescopable elements (ET) by means of guide extensions (7) which are fixed on the uprights. (6) and connected by longitudinal struts C8). The assembly is made by any means such as pins, bolts and reinforcements Cfigures 2, 3

and 4).

  The supporting structure is still equipped at each end with winches (symbolized at 9) for both raising the extension rods and telescopic elements by -5 - passing cables on pulleys (10) mounted on

the extension bars.

  Note that the profiles used for the uprights (6), the extensionguides (7> and the telescopable elements are omega section (Figure 11) to allow the sliding guide of said elements relative to the extension bars and amounts and for serve as guide rails to four rollers (11) equipping the mobile bridge (PX) which is placed in support by its floor on the rigid frame (OR) in the low position or transport (Figure 7) and which can be raised to the height desired by the winches (9) or others whose cables are wound on return pulleys (12>

  fixed at the top of the first developed element.

  Alternatively, the winches and pulleys can be replaced by hydraulic or pneumatic actuators, and the mobile bridge can be moved by a system of racks integrated with the telescopic elements and cooperating

  with gables subject to the bridge.

  The mobile gangway is equipped with an anti-fall device in case of cable breakage. This device illustrated in Figures 8, 9 and 10 is constituted by a latch (13) pivotally mounted at (14) on a side of. the gateway against a spring (15) to be constantly engaged in one of the multiple openings (16) formed on the elements

telescoping.

  The end (13a) of the latch is tapered to escape the openings during the climb of the bridge, while in the opposite direction, it automatically engages in the nearest opening and can be released only by an action manual on a lever multiplier effort (17)

secured to the lock.

  Also note that the gateway can present

several levels of work.

  The implementation of the scaffolding is carried out in the following manner after correct positioning on its

  stabilizers facing the surface to be treated.

  If necessary, the extension bars (7) arranged in the uprights (6) are raised in the active position by the winches (9) to a judiciously determined height where they are bolted to said uprights. Then, the first telescopable elements (ET> stored in the structure are raised with the help of the winches being guided by the uprights

  and the extension bars and are fixed by plates and counter

  bolted plates (18) with the following telescopic elements raised in the same way after holding the first elements in position. The operation is repeated as many times as is necessary to reach the working height

  desired (up to about 30 meters above the ground).

  Intermediate platforms can be arranged between the longitudinal struts (2) of the telescopic elements to serve as worktops. When the elements (ET) have all been mounted it remains only to place at the desired height by the winches the mobile bridge (PM> which is always positioned by its rollers in the profiles

in omega vertical elements.

  It should also be noted that the structure can be made in two distinct parts, that is to say an adaptable undercarriage under the rigid frame, which makes it possible to remove the chassis after being placed against the surface A

treat.

  The advantages are clear from the description, we

  emphasizes the rapid and easy implementation of the scaffolding, the high level of work safety and the better positioning of the operators, the simplified maintenance of the equipment, its easy transport and the improvement of the

  productivity as a result of the various advantages mentioned above.

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Claims (4)

  -1- transportable scaffolding with telescopic development - characterized in that it comprises a support structure (SP) stabilizing base (3) and / or rolling means (4), which is constituted by a rigid frame (OR) containing all the elements necessary for the development of the scaffold and having, on two opposite sides, sliding guide posts (6) for each element (ET) to be developed by means of appropriate control means arranged on the supporting structure, on extensions -guides (7), and on the telescopable elements; a working gateway (PX) guided with controlled sliding relative to the elements   telescopic being itself controlled by any means.   -2- Scaffolding according to claim 1, characterized in that the extending guides (7) judiciously braced are fixed after lifting by the control means on the uprights (6) of the supporting frame by any means to serve as a guide telescopic elements (ET) stored flat to   the inside of the supporting framework (SP).   -3- Scaffolding according to claim 1, characterized in that the telescopable elements (ET) are constituted by end panels (1) having multiple openings (16) and connected together when they are raised and mounted on the extension rods, with longitudinal spacers (2)   serving as support for intermediate platforms.   -4- Scaffolding according to claim 1, characterized in that the vertical elements (ET, 6,7) are formed by sections of omega section for example to ensure the sliding guide successive liftings and to constitute   guide rails for the mobile gateway (PI).   Scaffolding according to Claim 1, characterized in that the telescopic elements (ET) are assembled together.   on top of each other by bolting plates and counter   plates (18) judiciously arranged.   Scaffold according to claims 1 and 3 together,   characterized in that the movable gangway (PX) is equipped with an anti-fall device, consisting of a latch (13) with elastic positioning and beveled end (13a) to escape the openings (15) of the telescopic elements (ET> during the climb of the bridge and to automatically engage in said openings during the descent thereby blocking the bridge in a safety position which is canceled by a manual action on a lever (17) integral with the pivoting latch.   Scaffolding according to claims 1 and 4 together,   characterized in that the movable bridge laterally has rollers (11) judiciously arranged and cooperating with the omega profiles of the vertical elements for its sliding guide under the action of the winches (9). Scaffolding according to claim 1, characterized in that the carrier structure (SP) is arranged with stabilizing feet (3) with skids or wheels adjustable in height and laterally to ensure the level positioning of the scaffolding. 9- Scaffolding according to claim 1, characterized in that the carrier structure (SP) is equipped with one or more axles (4) and a removable tongue (5) to be towed by a vehicle. -10- Scaffolding according to claim 1, characterized in that the carrier structure (SP) is arranged. with compartments, bins, boxes ... to receive equipment from   construction site and / or a ballast product.   -11- Scaffolding according to claim 1, characterized in that the telescopic elements (ET) and the mobile bridge (PE) are raised by winches (9) mounted on the carrying structure and relayed by cables and pulleys return judiciously arranged.   -12- Scaffolding according to claim 1, characterized in that the telescopic elements (ET) are raised by pneumatic hydraulic actuators mounted on the carrier structure. -13- Scaffolding according to claim 1, characterized in that the mobile gateway (PIP [) is controlled by a device comprising racks secured to the vertical elements of the scaffold and cooperating with sprockets associated with the   bridge and connected to a motor.   Scaffolding according to claim 1, characterized in that the carrier structure (SP) is in two distinct parts:   in a rolling frame and a separable rigid frame.