FR3080133A1 - FORMWORK BANK COMPRISING A ACCESS SCALE WITH A MOBILE MARKET - Google Patents

Abstract

A formwork panel (B) comprising a vertical wall (11) comprising a formwork front face (F1) and a rear face (F2) opposite to the front face (F1), an upper platform (12) allowing the circulation of least one operator, an access ladder (3) to the upper platform (12), the formwork board (B) comprising a step (4) for supporting an operator and motorized moving means (5) of said walking (4) along the access ladder (3) between a low position (PB) and a high position (PH) so as to allow an operator to access the upper platform (12) without effort.

Description

FORMWORK BENCH INCLUDING AN ACCESS LADDER WITH A MOBILE STEP

GENERAL TECHNICAL AREA AND PRIOR ART

The present invention relates to the field of construction and more specifically the field of formwork formwork for the construction of concrete walls.

In known manner, a formwork form comprises a vertical wall comprising a formwork front face and a rear face opposite to the front face, an upper platform allowing the circulation of at least one operator and an access ladder to the upper platform. The upper platform includes a passage opening closed by a hatch. The ladder is connected to the passage opening in order to allow an operator to access the upper platform by climbing the ladder.

When the operator climbs or descends the ladder, it is likely to fall from the ladder, for example by sliding on a bar of the ladder, which has a first drawback. In addition, during formwork operations, the operator may have to climb and descend the ladder many times, which has a second drawback. The disadvantages presented above are amplified in the case where formwork formwork is superimposed vertically. The operator must successively use several ladders to go up or down the formwork.

To resolve these drawbacks, patent form FR1354815 discloses a formwork form comprising a movable upper platform moving in the vertical direction and along the formwork form using a motorized system. Such a mobile upper platform has the disadvantage of being complex and of not being able to adapt to the existing formwork formwork.

The invention therefore aims to solve these drawbacks by proposing a formwork form whose structure is improved in order to limit any risk of falling as well as any hardship for the operators.

GENERAL PRESENTATION OF THE INVENTION

To this end, the invention relates to a formwork form comprising a vertical wall comprising a formwork front face and a rear face opposite to the front face, an upper platform allowing the circulation of at least one operator and an access ladder to the upper platform.

The form is remarkable in that it includes an operator support step and means for motorized movement of said step along the access ladder between a low position and a high position so as to allow an operator to access the upper platform effortlessly.

Thanks to the invention, an operator can use mobile walking to access the upper platform without difficulty. Advantageously, the ladder makes it possible to guide walking, which limits the modifications to the form to integrate this new function. In addition, the operator can access the upper platform in a similar manner to the prior art via the same passage opening as in the prior art, which is practical. In the event of a malfunction of the means of movement, the upper platform remains accessible via the ladder.

Preferably, the distance between the low position and the high position is greater than or equal to 100 cm, preferably, greater than or equal to 200 cm, more preferably, greater than or equal to 350 cm.

Preferably, the displacement means comprising at least one endless screw, the step comprises at least one movable nut cooperating with the endless screw so as to allow the step to go up / down as a function of the direction of rotation of the worm. A worm screw is robust and can be conveniently integrated into a vertical upright of the ladder.

Preferably, the displacement means comprise at least one motor for driving the worm. More preferably, each vertical upright of the ladder includes a drive motor.

According to a particular aspect, the access ladder comprising two vertical uprights connected by horizontal bars, the displacement means are located in at least one vertical upright of the access ladder, preferably in the two vertical uprights. Thus, the movement of the step is integrated into the ladder, without impacting its size. When the displacement means are distributed in the vertical uprights, the displacement of the step is balanced.

Preferably, each vertical upright comprises at least one vertical slot for guiding the step.

Preferably, the displacement means comprising at least one actuating member, said actuating member is positioned on the step. An operator simply needs to press his foot to control the movement of the step, the operator being able to use his hands to stabilize himself during the movement. The actuator is preferably in the form of a pedal.

Preferably, the formwork panel comprises a stabilization ballast and the stabilization ballast comprises at least one source of power for the displacement means, preferably a source of electrical power. Advantageously, the weight of the power source makes it possible to form a useful weight used for stabilization.

According to a preferred aspect, the step is articulated on the ladder between a horizontal position of use and a vertical position of storage. In the storage position, the ladder can be climbed in a conventional manner by an operator, in particular, in the event of a malfunction of the displacement means.

The invention also relates to a method of access to an upper platform of a formwork formwork as presented above, method in which an operator climbs on the step in the low position, the step is moved by the means of movement along the access ladder to the high position so as to allow the operator to access the upper platform effortlessly.

The invention also relates to a method of lowering an operator from an upper platform of a formwork form as presented above, method in which an operator climbs on the step in the high position, the step is moved by the means of movement along the access ladder to the low position so as to allow the operator to descend from the upper platform effortlessly.

PRESENTATION OF THE FIGURES

The invention will be better understood on reading the description which follows, given solely by way of example, and referring to the appended drawings in which:

Figure 1 is a schematic representation in rear perspective of a formwork formwork according to the invention with the step in the low position, Figure 2 is a schematic perspective view from above of the formwork formwork of Figure 1, Figure 3 is a close-up diagrammatic representation of the step, FIG. 4 is a diagrammatic representation of the means for moving the step, FIG. 5 is a diagrammatic representation of the step in the folded position, FIG. 6 is a diagrammatic representation in rear perspective of the formwork form of Figure 1 with the step in the high position and Figure 7 is a schematic side view of the formwork form of Figure 1 in which the travel of the step between the low position and the high position is shown .

Note that the figures show the invention in detail to implement the invention, said figures can of course be used to better define the invention if necessary.

DESCRIPTION OF ONE OR MORE MODES OF IMPLEMENTATION AND IMPLEMENTATION

Referring to Figure 1, there is shown a formwork form B according to an embodiment of the invention. The formwork form B comprises a vertical wall 11 comprising a formwork front face F1 and a rear face F2 opposite the formwork front face F1. This formwork front face F1 is intended to be arranged inside the formwork and to be in contact with the cast material.

In this example, the formwork panel B is defined in an orthogonal coordinate system (X, Y, Z) in which the X axis extends from front to back, the Y axis extends laterally from the left to the straight and the Z axis extends vertically from bottom to top, that is to say, from a lower part to an upper part.

As illustrated in Figures 1 and 2, the formwork form B comprises an upper platform allowing the circulation of at least one operator, in particular, during concrete pouring operations. The formwork panel B includes a railing 13 mounted on the upper platform 12 to prevent an operator from falling. With reference to FIG. 2, the upper platform 12 comprises a passage opening 14, in particular of rectangular shape, in order to allow an operator to access the upper platform 12 via an access ladder 3 which will be presented by the after. The upper platform 12 includes a hinged hatch to close the passage opening 14 and prevent an operator from falling.

In this example, with reference to FIG. 1, the formwork form B also includes a stabilization ballast 2 connected to the upper platform 12 by crutches in order to avoid the tilting of the vertical form B, in particular under the wind force. In this exemplary embodiment, the access ladder 3 fulfills the function of a crutch but it goes without saying that crutches separate from the scale 3 could be suitable. As illustrated in FIG. 1, the stabilization ballast 2 is mounted opposite the rear face F2 and extends laterally along the axis Y. The stabilization ballast 2 is connected to the lower part of the vertical wall 11.

As indicated above, the formwork panel B comprises an access ladder 3 to the upper platform 12. In this example, the access ladder 3 is mounted between the stabilization ballast 2 and the access opening 14 of the upper platform 12. The access ladder 3 comprises two vertical uprights 31 arranged in parallel and a plurality of horizontal bars 32 connecting the vertical uprights 31. The horizontal bars 32 are distributed in a substantially regular manner to facilitate the ascent / descent of 'an operator.

According to the invention, the formwork form B comprises a step 4 for supporting an operator and motorized displacement means 5 of said step 4 along the access ladder 3 between a low position PB (FIG. 1) and a high PH position (Figure 3) so as to allow an operator to access the upper platform 12 without effort.

In this example, the distance between the low position PB and the high position PH is greater than or equal to 100 cm, preferably greater than or equal to 200 cm, in particular equal to 220 cm. Thus, the operator's arduousness is reduced over the course of the step 4. Advantageously, the low position PB is accessible from the stabilization ballast 2. Preferably, the low position PB is located less than 30 cm from the floor to allow operator access in one step. Similarly, the high PH position is located less than 30 cm from the upper platform 12 to allow operator access in one step.

With reference to FIG. 3, the step 4 comprises a body 40, in this example of rectangular shape, the length of one of its sides corresponding to the width of the access ladder 3, that is to say say at the distance between the vertical uprights 31. As illustrated in FIG. 1, the step 4 extends between the access ladder 3 and the rear face F2 of the vertical wall 11.

The step 4 comprises two connecting members 41 which are connected to the vertical uprights 31 in which the displacement means are housed 5. The connecting members 41 extend laterally to the body 40 and are respectively connected to the displacement means 5 by two axes articulation 42 allowing the body 40 to be articulated between a position of use (Figure 3) in which the plate 40 is horizontal and a storage position (Figure 5) in which the body 40 is vertical and folded against the ladder access 3. Thus, in the event of a malfunction, the step 4 can be folded down to allow an operator to use the ladder 3 as in the prior art.

In this example, the displacement means 5 are housed in the two vertical uprights 31 of the access ladder 3. As illustrated in FIGS. 3 and 4, the vertical uprights 31 are hollow and each include a vertical slot 33 in order to allow the sliding of the link member 41 of the step 4 in each vertical upright 31.

Referring to Figure 4 showing a sectional view of a vertical upright 31 of the scale 3, the displacement means 5 comprise, in each vertical upright 31, a worm screw extending along the length of the vertical upright 31 , a movable nut 52 cooperating with the worm screw 51 and a drive motor 53 configured to rotate the worm screw 51 about its axis, clockwise or counterclockwise, in order to raise or lower l mobile nut 52. The mobile nut 52 is integral in translation with the connecting member 41 of the step 4 so that the step 4 can go up or down under the control of the drive motor 53. In this example , as indicated above, each connecting member 41 is articulated to a movable nut 52 by a hinge pin 42 so as to allow the step 4 to be folded down in the storage position.

In known manner, an endless screw 51 comprises a threaded portion while a movable nut comprises a threaded portion to cooperate with the threaded portion. In this example, the drive motor 53 is placed at the lower end of the worm gear 51, in particular, at the lower end of the vertical post 31.

With reference to FIG. 4, the formwork panel B comprises a power source 6, in particular an electrical power source, for supplying energy to the displacement means 5, in particular, the drive motors 53. In this example, the power source 6 is positioned in the stabilization ballast 2 so as to reduce the size of the ladder 3. The power source 6 is connected to the drive motors 53 by electrical wires s' extend in the vertical uprights 31 of the ladder 3. Advantageously, a high mass supply source can be used because the mass of the ballast 2 allows the stabilization of the formwork panel B.

Alternatively, the power source 6 could be integrated directly into the access ladder 3, in particular, in its lower part. Such an alternative is advantageous in the case of the vertical superposition of a plurality of formwork formwork B. In fact, an upper formwork B does not include stabilizing ballast 2 which can accommodate a power source 6. According to a particular aspect , the power source 6 is housed in one or more horizontal bars 32 of the scale 3.

The displacement means 5 further comprise at least one actuating member 54 for controlling the ascent, descent and stopping of the step 4. In this example, there is provided a single actuating member 54 having under the shape of a pedal and which is located on the upper surface of the body 40 of the step 4 as illustrated in FIG. 3. Such an actuating member 54 allows an operator to control the ascent / descent / stop of the step 4 In this embodiment, the actuating member 54 makes it possible to transmit alternately a descent order and an ascent order to the drive motors 53 of the displacement means 5. In other words, during the first press, step 4 goes down and, on the second press, step 4 goes up, step 4 being stopped in the absence of support on the actuating member 54. Such an operation makes it possible to reduce the number of organs of actuation 54 and release d e space on the tray 40 for the operator. Alternatively, the displacement means 5 could comprise two actuating members 54, one for the ascent and one for the descent. The actuator 54 is connected to the drive motors 53 by electrical wires extending in the vertical uprights 31 of the ladder

3.

An example of implementation will now be presented with reference to FIG. 7. In this example, step 4 is in the low position PB.

When an operator wishes to access the upper platform 12, it rises on the body 40 of the step 4 which supports its weight. The forces linked to the weight of the operator pass from the body 40 of the step 4 to the movable nuts 52 mounted in the two vertical uprights 31 of the scale 3. Thus, the weight of the operator is supported by the scale 3.

To raise the step 4, the operator presses with his foot on the actuating member 54, which activates the drive motors 53 housed in each vertical post 31 and supplied by the power source 6 placed in the ballast 2. The worm screws 51 are driven in rotation and the movable nuts 52 translate vertically towards the upper platform 12. The operator thus climbs without difficulty and can stabilize by moving his hands on the ladder 3 as and measure of ascent. Near the upper platform 12, the latter can push the hatch with his hand or with his head in order to access the upper platform 12, in particular, for pouring concrete into the formwork. To stop the ascent, he just has to remove his foot from the actuating member 54. In the high PH position, the step 4 extends near the passage opening 14 of the upper platform 12 and prevents the risk of an operator falling through this passage opening 14 when the hatch is open.

If another operator, located at ground level, wishes to access the upper platform 12 while the step 4 is in the high PH position, the other operator can advantageously use the ladder 3 as in the prior art. He just has to fold the step 4 vertically (Figure 5) to give him enough space to climb the ladder 3. To fold the step 4, the connecting members 41 of the step 4 pivot around the axes d hinge 42.

When an operator wishes to descend from the upper platform 12, it is again sufficient for him to position himself on the mobile step 4 and to press with his foot on the actuating member 54, which activates the drive motors 53 and drives the worms 51 in the opposite direction to previously to translate the movable nuts 52 vertically downwards. The operator descends without pain and safely. To stop the ascent, he just has to remove his foot from the actuator 54. The use of the mobile step 4 is simple because it is enough for the operator to step on step 4 to activate it.

In the event of a malfunction of the displacement means 5, the step 4 can be folded down to allow an operator to climb / descend the ladder 3 in a manner similar to the prior art.

In an example of implementation not shown, several formwork forms B are superimposed vertically. Thanks to the invention, an operator can access each formwork form B in succession using the mobile step 4 of each formwork form B. Thus, the painfulness of an operator is reduced even to reach an upper platform 12 located at a great height.

Advantageously, it suffices to replace a conventional ladder with a ladder according to the invention to allow the advantages of the invention to be obtained. It is advantageously not necessary to modify the structure of the formwork panel.

Claims (10)

1. Formwork formwork (B) comprising a vertical wall (11) comprising a formwork front face (F1) and a rear face (F2) opposite the front face (F1), an upper platform (12) allowing the circulation of at least one operator, an access ladder (3) to the upper platform (12), formwork form (B) characterized in that it comprises a step (4) for supporting an operator and means for motorized movement (5) of said step (4) along the access ladder (3) between a low position (PB) and a high position (PH) so as to allow an operator to access the platform upper (12) effortlessly. 2. Formwork formwork (B) according to claim 1, in which the distance between the low position (PB) and the high position (PH) is greater than or equal to 100 cm, preferably greater than or equal to 200 cm. 3. Formwork formwork (B) according to one of claims 1 to 2, in which, the displacement means (5) comprising at least one worm (51), the step (4) comprises at least one movable nut (52) cooperating with the worm (51) so as to allow the step (4) to go up / down as a function of the direction of rotation of the worm (51). 4. Formwork formwork (B) according to claim 3, in which the displacement means (5) comprise at least one drive motor (53) of the worm (51). 5. Formwork formwork (B) according to one of claims 1 to 4, in which the access ladder (3) comprising two vertical uprights (31) connected by horizontal bars (32), the displacement means (5) are located in at least one vertical upright (31) of the access ladder (3), preferably in the two vertical uprights (31). 6. Formwork formwork (B) according to claim 5, wherein each vertical upright (31) comprises at least one vertical slot (33) for guiding the step (4). 7. formwork panel (B) according to one of claims 1 to 6, wherein the displacement means (5) comprising at least one actuating member (54), said actuating member (54) is positioned on the step (4). 8. Formwork formwork (B) according to one of claims 1 to 7, in which, the formwork formwork (B) comprising a stabilization ballast (2), the stabilization ballast (2) comprises at least one source of supply (6) of the displacement means (5). 9. Formwork formwork (B) according to one of claims 1 to 8, in which the step (4) is articulated on the ladder (3) between a horizontal position of use and a vertical position of storage. 10. Method for accessing an upper platform (12) of a formwork formwork (B) according to one of claims 1 to 9, method in which an operator climbs on the step (4) in the low position (PB ), the step (4) is moved by the displacement means (5) along the access ladder (3) to the high position (PH) so as to allow the operator to access the upper platform (12) effortlessly.