FR2989364A1 - Winch for raising protective canopy in foldable cantilevered working structure, has traction cable intended to raise protection canopy pivotally mounted on circulation plate of foldable cantilevered working structure - Google Patents

Abstract

The winch (7) has a traction cable (10) intended to raise a protection canopy (6) pivotally mounted on a circulation plate (2) of a foldable cantilevered working structure (1). A leg includes a removable fixing unit connected to a circulation plate of the foldable cantilevered working structure, where the fixing unit is arranged to be in engagement with a housing (9) of the circulation plate of the foldable cantilevered working structure. The fixing unit includes a notch ready to correspond with a mounting rod extending in the housing. An independent claim is also included for a method for raising a protective canopy in a foldable cantilevered working structure.

Description

The present invention relates to the field of the building and, more particularly, to a collapsible working structure in corbelling comprising a plate, at least one amount. articulated at one end on the plate about an axis of articulation substantially parallel to the plate, between a folded position and an unfolded position of use substantially orthogonal to the plate, at least one foldable arm, connecting the plate and the upright and releasable means for locking the arm in unfolded position. Structures of this type are used in particular in the building and public works to be fixed by the amounts to a wall of the construction, the plateau defining a bridge passable by the workers. For example, such a structure is known from FR2906286 of SATECO. Conventionally, the foldable structure comprises a protective canopy adapted to prevent any fall of the tray operator. A protective canopy is in the form of a substantially vertical wall enclosing the edge of the tray farthest from the wall as shown in Figure 1. In a conventional manner, the protective canopy is pivotally mounted on the tray so can be folded against the tray in the storage position or unfolded in its service position as shown in Figure 1. Traditionally, to unfold the protective canopy, it is necessary to use a crane that raises the upper end of the awning by means of a sling. One of the objectives of the present application is to allow unfolding of the awning without crane to accelerate the assembly of a collapsible working structure cantilever. To this end, the invention relates to a winch for lifting a protective canopy of a collapsible work structure cantilevered, the winch comprising at least one traction cable adapted to raise a protective canopy pivotally mounted on a circulation plate of a collapsible working structure cantilever, said winch comprising a foot comprising removable fastening means to a circulation plate of a collapsible working structure cantilever. Thanks to the invention, the awning can be unfolded without the aid of a crane which allows to accelerate the installation of a foldable structure. In addition, as the winch foot is connected to the traffic plate, it is not necessary to provide a weighted winch which is bulky and heavy. In other words, the circulation plate forms the weighted base of the winch which allows the lift without effort of the awning. This is particularly advantageous for raising a high mass awning. Preferably, the fastening means are arranged to correspond by interlocking with a housing of a circulation plate of a collapsible working structure cantilever. Thus, simply snap the foot to ensure a connection between the winch and the traffic plate.

More preferably, the fixing means comprise at least one notch adapted to correspond with a mounting rod extending in the housing. Thus, the notch and the stem correspond to allow precise alignment of the winch relative to the plate.

Preferably, the fixing means comprise at least two lateral tongues adapted to cooperate with the housing so as to prevent lateral movement of the winch in the housing.

The invention also relates to an assembly comprising a foldable work structure in cantilevering comprising a circulation plate and a protective canopy pivotally mounted on said circulation plate and a winch as presented above whose foot is removably mounted to circulation plate and whose winch pulling cable is connected to the awning.

Preferably, the circulation plate comprises a fixing housing formed in the thickness of the plate. Preferably, the plate comprises a metal frame supporting a floor. The housing is formed in the metal frame.

According to a preferred aspect, the fixing housing has a parallelepipedal shape adapted to receive the winch attachment means. Thus, the position of the winch is perfectly defined vertically and horizontally which ensures a lift without effort. More preferably, the mounting housing has a mounting rod extending into the housing. Preferably still, the assembly comprises a locking pin removably mounted in the housing for locking the attachment of the winch foot in the housing. Thus, by simple broaching, it is possible to lock the position of the winch relative to the structure. The invention also relates to a method of raising a protective canopy of a collapsible working structure in cantilevering by means of a winch as presented above, the collapsible working structure in corbelling comprising a circulation plate and a canopy protection device pivotally mounted on said circulation plate, the protective canopy being in the folded position, comprising: a step of fixing the winch foot to the circulation plate of the structure; a step of connecting the tow rope of the winch to the protective awning, and a step of pulling the cable of the winch so as to rotate the protective canopy in the unfolded position. The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which: FIG. 1 represents a corbelled work structure according to the prior art, canopy is unfolded (already shown); Figure 2 is a perspective view of a corbel work structure on which is mounted a hoist winch according to the invention, the awning being unfolded; Figure 3 is a front perspective view of the hoist winch of Figure 2; Figure 4 is a rear perspective representation of the hoist winch of Figure 2; Figure 5 is a perspective representation of the hoist winch head of Figure 2; Figure 6 is a perspective view of the control device of the hoist winch of Figure 2; Figure 7 is a rear perspective view of the hoist winch foot of Figure 2; Figure 8 is another rear perspective view of the hoist winch foot of Figure 2; Figure 9 is a perspective view of the tray attachment housing for receiving the mounting foot of the hoist winch connected to the corbelled working structure of Figure 2; Figure 10 is a left perspective view of the hoist winch foot connected to the cantilevered work structure of Figure 2; and FIG. 11 is a diagrammatic representation of the unfolding of the canopy of the corbelled structure of FIG. 2. It should be noted that the figures explain the invention in detail to implement the invention, said figures being of course to better define the invention where appropriate.

Working Structure Referring to Figure 2, there is shown a collapsible working structure cantilever 1 according to the invention. In a conventional manner, this structure 1 comprises a circulation plate 2 intended to serve as a bridge for operators, for example, workers on a construction site. In this example, the circulation plate 2 has a substantially rectangular shape. Subsequently, the structure 1 will be presented in the orthogonal coordinate system (X, Y, Z) shown in FIG. 2 in which the X axis extends according to the width of the circulation plate and in which the Y axis is extends along the length of the traffic plate so as to define a horizontal plane (X, Y). Subsequently, the terms "forward" and "backward" are defined relative to the X axis that extends from front to back while the terms "left" and "right" are defined relative to the Y axis that extends from right to left. Similarly, the terms "low" and "high" are defined with respect to the vertical axis Z which extends from the bottom upwards upwards in FIG. 2.40 The structure 1 further comprises two parallel uprights 3 hinged to an end on the plate 2 so as to be able to pivot each about a hinge axis A (assumed horizontal) between a folded position, in which each upright 3 extends substantially parallel to the plate 2 (see FIG. 2), and an open position of use, wherein each upright 3 extends substantially orthogonally to the plate 2 (see Figure 1). Thus, each upright 3 can pivot relative to the circulation plate 2 over an angular amplitude of about 90 °. The structure 1 further comprises, associated with each upright 3, a foldable arm, connecting the plate 2 and the upright 3, which extends obliquely in the position of use of the structure 1, as shown in FIG. 1. In this example, the foldable arm comprises two tubular legs and an articulation connecting the crutches. Each amount 3 is here articulated on a front lateral edge of the circulation plate 2. To unfold the structure 1, it raises the latter by means of a crane connected to the circulation plate 2 by slings. To ensure the safety of the operators, the traffic plate 2 is equipped with side protections 5, known to those skilled in the art under the name of railings 5 which are pivotally mounted on the side edges of the circulation plate 2 so as to extend horizontally on the circulation plate in the folded storage position (Figure 2) and vertically in unfolded position of use.

Similarly, to ensure operator safety, the traffic plate 2 is equipped with a rear protection canopy 6 which is pivotally mounted on the rear edge of the circulation plate 2 around a hinge B, parallel to the axis Y, so as to extend horizontally on the circulation plate in folded storage position (Figure 2) and obliquely / vertically in unfolded position of use. For example, the awning 6 is inclined at an angle of the order of 50 ° - 90 ° with the plate 2 in the use position as shown in Figure 1. In this example, the canopy 6 is in the form of a substantially rectangular grid panel whose length is substantially equal to that of the plate 2 and whose width is slightly smaller than that of the plate 2 as shown in Figure 2. The awning 6 is in this example composed of a metallic material and has a high mass. Preferably, the side rails 5 of the foldable structure are articulated on the awning 6 so as to be unfolded laterally when raising the awning 6. In other words, the side rails 5 are unfolded automatically which accelerates the installation of such a structure.

In other words, the rear edge of the structure is placed against a concrete veil while the front edge and the side edges are closed (guard and awning) to prevent the fall of an operator. Lifting winch 40 In order to raise the awning 6, that is to say, to move it from its storage position to its position of use, a lifting winch 7 is used as shown in FIG. 2 which is fixed removably to the structure 1.

A winch 7 is, by definition, an apparatus for pulling or lifting loads, by means of a rope, cable or chain that wraps around a horizontal cylinder (called drum ") or a nut, operated with or without reduction by a crank or by a motor. Such hoisting winch allows a multiplication of efforts to facilitate the raising of the awning while allowing to slow down the descent. Preferably, the winch comprises safety means for stopping the descent of the awning in case of abrupt descent, for example, when the control lever of the winch is released. The lifting winch 7 according to the invention advantageously makes it possible to raise a large number of protective louvers 6 for a plurality of foldable structures 1 without resorting to a crane. This makes it possible to accelerate the setting up of the structures 1 when the crane is not available. Once the canopies raised 6, the crane can then directly enter the structures 1 to unfold their uprights 3 and move them to their place of use, for example, on a side face of a concrete wall.

The hoisting winch 7 will be presented in detail with reference to FIGS. 3 to 8. As illustrated in FIGS. 3 and 4, the winch 7 comprises a longitudinal body 70, preferably rectilinear, the median portion 70M of which comprises winding means. / unfolding 71 of a traction cable (not shown), whose upper part 70A, hereinafter referred to as the head, is provided with means 72 for guiding the traction cable and whose lower part 70B, hereinafter referred to as a foot, comprises fastening means 8 adapted to be mounted removably to the foldable structure 1. In this example, the winch 7 comprises a pulling cable (not shown), a first end of which is fixed to the winding / unwinding means 71 and of which a second free end may be equipped with attachment means, for example, a hook. The traction cable is guided during its unwinding by guide means 72 formed in the head 70A of the winch 7. With reference to Figure 5, the guide means 72 here comprise a wheel 721 rotatably mounted along an axis of rotation C , parallel to the axis Y, between two side walls 722 from the body 70 of the winch 7. In this example, the wheel 721 has a circumferential groove 723 adapted to receive the pulling cable and thus guide its winding / unwinding. Preferably, the width of the circumferential groove 723 is adapted to the diameter of the traction cable.

In this example, the traction cable extends internally to the body 70 of the winch 7 between the winding / unwinding means 71 and the guide means 72, but it goes without saying that it could also extend externally to said body 70. .

Referring to Figure 6, the winding / unwinding means 71 comprise a winder (not shown) mounted in a housing 711 integrally connected to the body 70 of the winch 7 and a handle 712 rotatably mounted about an axis D, parallel to the Y axis, a first end of which is connected to the winder placed in the casing 711 and of which another end protrudes out of the casing 711 so as to be handled by an operator in order to wind or unroll the cable Such winding / unwinding means 71 are conventional and will not be detailed further. The invention is here presented with manual winding / unwinding means but it goes without saying that they could be activated automatically, for example, by means of an electric motor. As illustrated in Figures 2 to 4, the foot 70B of the winch 7 comprises fastening means 8 to a corbel structure 1 and, in particular, to its circulation plate 2 as will be presented later. The fastening means 8 are adapted to form a removable connection with the structure 1 so that the winch 7 can be mounted successively on a plurality of structures 1 in order to raise their awning 6. With reference to FIGS. 7 and 8 , the fixing means 8 comprise two longitudinal parallel tongues 81 each extending vertically in a pan parallel to the plane (X, Z), each tongue 81 extending along its length forward along the X axis from the body 70 of the winch 7. Each longitudinal tongue 81 has at its front end a through hole 82 so as to form a locking pin F1 between the two orifices 82 of the two longitudinal tongues as shown in Figure 7.

In this example, the longitudinal tabs 81 are connected by an intermediate piece 83 extending horizontally in a pan parallel to the plane (X, Y), the intermediate piece 83 extending along its length forward along the X axis from the body 70 of the winch 7 and is secured to the inner faces of the longitudinal parallel tongues 81 as shown in Figures 7 and 8. In this example, the intermediate piece 83 extends substantially above the locking axis F1. Still with reference to FIGS. 7 and 8, the fastening means 8 comprise two parallel attachment tabs 85 each extending vertically in a plane parallel to the plane (X, Z). In this example, each tab 85 is in the form of a right triangle whose hypotenuse extends obliquely to the X and Z axes while the other sides of the triangle extend respectively parallel to the X and Z axes. bottom of each tab 85 extends forward parallel to the X axis and has a notch 86, preferably curvilinear, so as to form an indexing axis F2 between the two notches 86 of the two parallel tabs 85 as shown in Figure 7.

The fastening means 8 further comprise a plate 80 extending vertically in a plane parallel to the plane (Y, Z) from which the tongues 81 and the lugs 85 project forward as shown in FIGS. 7 and 8.

Attaching the hoisting winch to the structure The corbelled work structure 1 comprises a circulation plate 2 comprising a housing 9 for fixing the winch 7 as shown in FIGS. 9 to 11. In this example, the housing 9 has a generally parallelepiped shape and comprises two vertical parallel walls 91, extending parallel to the plane (X, Z). The lateral distance between the two vertical walls 91 is here substantially equal to that separating the longitudinal tongues 81 from the attachment means 8 of the winch 7 so as to prevent any lateral deflection of the winch 7 once fixed in the housing 9.

Preferably, the housing 9 is fixed on the front edge of the circulation plate 2 so as to allow the awning 6 to pivot rearwardly. More preferably, the housing 9 is located in the center of the edge of the circulation plate 2 so as to allow a balanced lifting of the protective canopy 6.

In this example, the circulation plate 2 comprises a metal frame on which is fixed a wooden tray. The housing 9 is formed in the metal frame, preferably in a tubular portion extending along the axis X. In this example, the fixing housing 9 comprises a mounting rod 92 extending along the Y axis of transversely to the side walls 91 of the housing 9. The mounting rod 92 is fixed in a lower portion of the housing 9 so as to allow the cooperation of the notches 86 of the fastening means 8 of the winch 7 with the mounting rod 92 while allowing the insertion of the tongues 81 and tabs 85 in the housing 9. Thanks to the mounting rod 92, the winch 7 can only pivot around the axis Y in the housing 9.

To secure the winch 7, each side wall 91 of the housing 9 has an orifice so as to form a locking pin F1 in which a pin 93 can be inserted to block the rotation of the foot 70B of the winch 7 in the housing as shown in FIGS. Figures 9 and 10. In practice, the pin 93 extends above the fastening tabs 85 so as to prevent a forward rotation of the winch 7 around the Y axis.

Each side wall 91 of the housing 9 further comprises an orthogonal fin 90 extending outwardly of the housing 9 and adapted to rest on the plate 80 of the foot 70B of the winch 7 during its fixing. Such a fin 90 advantageously allows to drive and distribute the efforts of the winch 7 to the circulation plate 2 when raising the awning 6 which increases the life of the assembly. Lifting method A method of lifting the protective canopy 6 of the collapsible working structure cantilever 1 by means of the winch 7 will now be presented. First, the method comprises a step of fixing the foot 70B of the winch 7 to the circulation plate 2 of the structure 1. During this step, the foot 70B of the winch 7 is introduced into the housing 9 so as to cooperating the notches 86 of the mounting lugs 85 with the mounting rod 82. To facilitate this step, the winch 7 is inclined at its introduction. After notching the notches 86 with the mounting rod 82, the winch 7 is free to pivot about the Y axis.

To lock the winch 7 to the structure 1, the winch 7 is tilted backwards so that the plate 80 is in contact with the fins 90 of the housing 9. Next, a pin is inserted into the housing 9 to prevent any tilting of the winch 7 forward. The winch 7 is then secured in vertical position to the structure 1.

To raise the awning 6, the method comprises a step of connecting the traction cable 10 of the winch 7 to the protective awning 6 which is in the folded position. In a preferred manner, the traction cable 10 comprises a hook which is connected to an upper end of the protective canopy 6. Preferably, the step of connecting the traction cable 10 of the winch 7 to the protective canopy 6 is performed after the fixation step but it goes without saying that it could also be done before.

The method further comprises a pulling step, illustrated in FIG. 11, during which an operator actuates the handle 712 (step E1) so as to wind the traction cable 10 which exerts a pull (step E2) on the traction cable 10 which is guided in the groove 723 of the wheel 721 of the winch head 7. As the cable 10 is connected to one end of the awning 6, this results in a rotation of the awning 6 (step E3 ) who gets up. During rotation, the weight of the awning 6 induces forces that pass through the body 70 of the winch 7 as well as through the circulation plate 2. The plate 80 of the winch 7 and the fins 90 of the housing 9 allow to improve the distribution of forces when they pass from winch 7 to housing 9.

Claims (10)

REVENDICATIONS1. Winch (7) for lifting a protective canopy (6) of a folding cantilever work structure (1), the winch (7) having at least one pulling cable (10) capable of raising a canopy of protection (6) pivotably mounted on a circulation plate (2) of a collapsible cantilever work structure (1), said winch (7) having a foot (70B) comprising removable fastening means (8) for a circulation plate (2) of a folding cantilever work structure (1). 2. Lifting winch according to claim 1, wherein the fastening means (8) are arranged to correspond by interlocking with a housing (9) of a circulation plate (2) of a foldable work structure cantilevered ( 1). 3. hoist winch according to one of claims 1 to 2, wherein the fastening means (8) comprise at least one notch (86) adapted to correspond with a mounting rod (92) extending in the housing ( 9). 4. hoist winch according to one of claims 1 to 3, wherein the fastening means (8) comprise at least two lateral tongues (81) adapted to cooperate with the housing (9) so as to prevent lateral movement of the winch (7) in the housing (9). An assembly comprising a collapsible cantilever work structure (1) comprising a circulation plate (2) and a protective canopy (6) pivotally mounted on said circulation plate (2) and a winch (7) according to the invention. one of claims 1 to 4 whose foot (70B) is removably mounted to the circulation plate (2) and whose traction cable (10) of the winch (7) is connected to the awning (6). 6. The assembly of claim 5 wherein, the circulation plate (2) comprises a fixing housing (9) formed in the thickness of the plate (2). 7. The assembly of claim 6 wherein, the mounting housing (9) has a parallelepiped shape adapted to receive the fastening means (8) of the winch (7). 8. An assembly according to one of claims 5 to 7 wherein the mounting housing (9) comprises a mounting rod (92) extending into the housing (9). 9. Assembly according to one of claims 5 to 8, comprising a locking pin (93) removably mounted in the housing (9) for locking the attachment of the foot (70B) of the winch (7) in the housing (9). ) .40 10. Method of lifting a protective canopy (6) of a collapsible work structure cantilever (1) by means of a winch (7) according to one of claims 1 to 4, the foldable structure of work cantilever (1) comprising a circulation plate (2) and a protective canopy (6) pivotally mounted on said circulation plate (2), the protective canopy (6) being in the folded position, comprising: a step of fixing the foot (70B) of the winch (7) to the circulation plate (2) of the structure (1); a step of connecting the pull cable (10) of the winch (7) to the protective awning (6), and a step of pulling the cable (10) of the winch (7) so as to rotate the awning of protection (6) in unfolded position.