The aim of this invention is to increase the rigidity of the integrated formworks at the time of their installation, to facilitate the work of the civil engineers if order to determine easily the contribution of the horizontal frameworks and to reduce manufacturing costs. This aim is reached by a fo
The aim of this invention is to increase the rigidity of the integrated formworks at the time of their installation, to facilitate the work of the civil engineers if order to determine easily the contribution of the horizontal frameworks and to reduce manufacturing costs. This aim is reached by a formwork including two parallel formwork walls placed one facing the other provided with shaped bars forming the vertical stiffeners and connected by at least one articulated connection device allowing the maintenance of the formwork walls either at a distance defining a space to receive a filler such as concrete, or folded for storage and transport. The connection device is characterized in that it includes a first rectilinear horizontal bar parallel to the first formwork wall and passing through the stiffeners of said first wall, a second rectilinear horizontal bar parallel to the second formwork wall and going through the stiffeners of said second wall, said second bar being situated facing the first bar, and a plurality of connection bars perpendicularly linking the two horizontal bars, said connection bars being articulated around said horizontal bars.
대표청구항▼
The invention claimed is: 1. A formwork for a concrete wall, the formwork comprising: two parallel formwork walls made of metallic latticed panels placed facing each other provided with metallic shaped bar forming vertical stiffeners and connected by at least one articulated metallic connection dev
The invention claimed is: 1. A formwork for a concrete wall, the formwork comprising: two parallel formwork walls made of metallic latticed panels placed facing each other provided with metallic shaped bar forming vertical stiffeners and connected by at least one articulated metallic connection device allowing the formwork walls to be maintained either at a distance defining a space to receive a filler such as concrete, or folded for storage and transport, wherein, the at least one articulated metallic connection device includes: a first rectilinear horizontal metallic bar parallel to the first formwork wall and pass through holes in the stiffeners of said first wall, a second rectilinear horizontal metallic bar parallel to the second formwork wall and passing through holes in the stiffeners of said second wall, said second bar being situated facing the first metallic bar, and a plurality of metallic connection bars linking perpendicularly the two horizontal bars, said connection bars being articulated around said horizontal bars. 2. The formwork according to claim 1, wherein the stiffeners of the formwork walls facing each other are generally U-shaped and are placed opposite each other and the connections bars are placed between the lateral sides of the U-shaped sections of two stiffeners which are opposed and articulated around the horizontal bar part situated between these sides. 3. The formwork according to claim 1, wherein the stiffeners of the formwork walls are generally U-shaped and the stiffeners of a formwork wall are out of line in comparison with those of the other formwork wall, and one of the ends of a connection bar is articulated between the lateral sides of the U-shaped section of a stiffener while the other end is articulated around a part of the opposed horizontal bar situated between two stiffeners. 4. The formwork according to claim 1, wherein the stiffeners of the formwork walls are spaced at approximately regular intervals on the length of the formwork walls. 5. The formwork according to claim 1, wherein the horizontal bars are spaced at approximately regular intervals on the height of the formwork walls. 6. The formwork according to claim 2, wherein each lateral side of the U-shaped section of the stiffeners includes holes positioned one facing the other on each lateral side and facing those of the lateral sides of the near stiffeners in such a way that they allow a horizontal bar to slide freely when it goes through each stiffener of the formwork wall. 7. The formwork according to claim 1, wherein the connection bars include a hole at each end by which the horizontal bar passes freely by carrying out the articulation of said connection bar around said horizontal bar. 8. The formwork according to claim 1, wherein the connection bars include curved ends which roll-up around the horizontal bars. 9. The formwork according to claim 8, wherein the stiffeners are generally U-shaped with lateral sides and at least one of the ends of the connection bars is rolled-up around the horizontal bar part which is between the lateral sides of the U formed by the stiffeners of one of the formwork walls. 10. The formwork according to claim 1, wherein the connection bars are positioned at approximately regular intervals in the length direction as well as in the height direction of the formwork walls. 11. The formwork according to claim 1, including a framework disposed in the spaces delimited by the connection bars and by the formwork walls, said framework includes at least two vertical bars having the height approximately equal to the height of the formwork and a plurality of horizontal bars linking the two vertical bars. 12. The formwork according to claim 11, wherein the frameworks, which is of floating type, is situated in a central zone of the space that it occupies between the formwork walls and the connection bars. 13. The formwork according to claim 11, wherein the framework is maintained, by hooks or fasteners either on the horizontal bars, or on the uppermost connection bars of the formwork. 14. The formwork according to claim 1 further comprising: an insulating panel situated between the stiffeners and one of the formwork walls, said insulating panel, extending on the whole surface of the formwork wall, is fixed at the back of the stiffeners by means of screws or fasteners which, going through the panel, maintain the formwork wall against the stiffeners.
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