WO2023057949A1

WO2023057949A1 - Climbing bracket for formwork for vertical castings

Info

Publication number: WO2023057949A1
Application number: PCT/IB2022/059554
Authority: WO
Inventors: Lucia FARESIN
Original assignee: Faresin Formwork SpA
Current assignee: Faresin Formwork SpA
Priority date: 2021-10-07
Filing date: 2022-10-06
Publication date: 2023-04-13
Anticipated expiration: 2024-04-07
Also published as: IT202100025505A1; AU2022359012A1

Abstract

A climbing bracket (10) for formwork for vertical castings, comprising an assembly (11) for support on a walkable surface and with which a vertical formwork (12) is associable, the supporting assembly (11) being vertically translatable during the various steps of the casting of the concrete. A pair of rails (13) is fixed to the supporting assembly (11), is extended in a direction at right angles to the plane of the vertical formwork (12), and respective carriages (14) are coupled thereto which are provided with at least one respective wheel (15) with which they are adapted to slide on the rails (13).

Description

CLIMBING BRACKET FOR FORMWORK FOR VERTICAL CASTINGS

The present invention relates to a climbing bracket for formwork for vertical castings.

The invention finds application in the construction industry in the field of construction equipment, in particular in formwork systems, to support wall formwork during the provision of above-ground casting extensions.

As is known, during the construction of walls, climbing brackets are anchored to adapted anchors embedded in the part of the wall provided in the previous casting step. After the casting step is completed, the climbing bracket is lifted, by suitable means, until it reaches the position for the next step. The form work is integral with the bracket, and therefore the lifting of the two parts can take place simultaneously.

Climbing brackets for wall construction can be either of the fixed type or with a translating carriage, to allow the panel to translate forward, toward the casting, in the formwork step and backward for the formwork release step.

Fixed-type brackets have horizontal beams for support of a walkable surface and vertical beams connected at one end of the preceding beams and by means of inclined struts. Protective systems, such as parapets, are typically fixed to the opposite ends. The vertical beams, which are adapted to translate vertically between one casting step and the next, essentially act as load-bearing elements to translate the other elements connected to them, substantially constituting the climbing part of the bracket.

This part moves along the wall until it meets the supporting anchors, to which it anchors. The form work panel is provided with pairs of vertical double-C beams by bolting them to the upper part of the vertical beams of the climbing bracket. In this way, the load of the casting, due to the pressure of the concrete, is transmitted to the bracket structure. Additional inclined struts are provided appropriately and are installed between the horizontal beams of the bracket and the panel beams. In addition to bearing the weight of people, the bracket, by means of the struts, helps to counteract the thrust of the casting.

This type of bracket is suitable for single-sided castings, to be performed, for example, for the construction of walls against soil.

Other brackets, such as the translating ones known to date, require the use of two climbing brackets to provide above-ground casting extensions between two mutually opposite form work units.

Translating brackets are distinguished from fixed brackets in particular by the presence of translation carriages designed to translate on respective horizontal guides and moved by means of rack-and-pinion systems, the carriage elements being appropriately coupled to the underlying horizontal beams to move only forward toward the casting and backward for formwork release. In this case also, the formwork panel is provided with vertical double-C beams, but their connection to the lower part occurs at the respective translation carriages. With this system, the formwork and the walkable surface translate together on the guides as a single element. In this case also there are additional inclined struts, which with respect to the fixed system are connected to the vertical beams of the panel with one end and are also connected with the other end to the respective carriages.

This bracket is adjustable at least according to two possible positions, namely a formwork position for casting, in which the carriage is blocked by means of a wedge to the underlying guide, and a formwork release position, in which the carriage is typically coupled to the anchors supporting the uprights of the parapet.

In this case, the structure is not suitable for single-sided castings, as it cannot bear the load of the casting, and therefore requires a mutually opposite structure.

Another drawback of this type of structure is the presence of the rack- and-pmion system, which is per se awkward for the operator and even more so if it becomes soiled with concrete.

The aim of the present invention is to provide a climbing bracket that is capable of improving the background art in one or more of the above aspects.

Within the scope of this aim, an object of the invention is to provide a climbing bracket that is suitable for single-sided castings and at the same time translates for the form work release step.

Another object of the invention is to provide a bracket that can be easily and quickly moved in translation and locked in the respective formwork placement and formwork release positions.

A further object of the invention is to provide a bracket adapted to translate easily while ensuring stability to the system and constraining its vertical and lateral translation.

Moreover, an object of the present invention is to overcome the drawbacks of the background art in a manner that is alternative to any existing solutions.

Not least object of the invention is to provide a climbing bracket that is highly reliable, relatively easy to provide, and at competitive costs.

This aim, as well as these and other objects that will become better apparent hereinafter, are achieved by a climbing bracket for formwork for vertical castings, comprising an assembly for support on a walkable surface and with which a vertical formwork is associable, said supporting assembly being vertically translatable during the various steps of the casting of the concrete, said climbing bracket being characterized in that a pair of rails is fixed to said supporting assembly, is extended in a direction at right angles to the plane of said vertical formwork, and respective carriages are coupled thereto which are provided with at least one respective wheel with which they are adapted to slide on said rails.

Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment of the climbing bracket according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:

Figure 1 is a view of a climbing bracket according to the invention in a forward configuration for vertical casting;

Figure 2 is a view of the same climbing bracket as in Figure 1, in a retracted configuration for form work release;

Figure 3 is a side view of the climbing bracket in the configuration of Figure 1;

Figure 4 is an enlarged- scale view of Figure 3;

Figure 5 is a perspective view of a rail;

Figure 6 is a transverse sectional view of the rail;

Figure 7 is a perspective view of a carriage;

Figure 8 is a transverse sectional view of the carriage;

Figure 9 is a transverse sectional view of the carriage and the rail assembled one on top of the other.

With reference to the figures, the climbing bracket according to the invention, generally designated by the reference numeral 10, includes an assembly 11 for support on a walkable surface and with which vertical form work 12 can be associated. The supporting assembly 11 can translate vertically, in a per se known manner, during the various steps of concrete casting.

A pair of rails 13 is fixed to the supporting assembly 11 and extends in a direction that is perpendicular to the plane of the vertical form work 12; respective carriages 14, equipped with at least one respective wheel 15 with which they are adapted to slide on the rails 13, are coupled to said rails.

Figure 1 and Figure 2 show two different configurations of the same climbing bracket: in the first case the configuration during concrete casting, with the form work 12 against the wall under construction (not shown), and in the second case the configuration during the dismantling step, with the form work 12 moving away from the wall. Figure 3 is a side view of the climbing bracket 10 according to the configuration of Figure 1.

In a per se known manner, the supporting assembly 11 comprises two parallel pairs of vertical C-beams 16 to be fixed to the wall of the previous casting step by virtue of per se known anchoring means.

Two other similar pairs of beams, in this case horizontal beams 17, are associated with the respective pairs of vertical beams 16, forming a support for I-beams 18, which are transverse with respect to the horizontal beams and on which wooden planks can be laid to form the walkable surface.

First struts 19 are installed between the horizontal beams 17 and the respective vertical beams 16.

Anchors 20 are installed at the free end of the bracket and supporting posts 21 are installed thereon for fall-preventing protection elements, such as wooden planks.

Each rail 13 is installed above the transverse beams 18, substantially resting on them as can be seen in Figures 1, 2, 3 and 4, and has, as shown in the perspective view of Figure 5, coupling posts 22 provided with holes for fixing by bolting to the underlying horizontal beams 17. Fixing occurs in a per se known manner.

The carriages 14 have a portion for coupling to the vertical form work 12, with which they are adapted to slide on the rails 13, which consists of a pair of parallel plates 23 of substantially trapezoidal shape which are present in the front part of the carriage 14. In the present description, "front" is defined as the part of the bracket that is closest to the vertical form work 12.

The wheel 15 of each carriage 14 is shown with the cross-sections of Figure 8 and Figure 9. It has a circular groove 24 at which it rests on a guiding rod 25 which is extended longitudinally along a respective rail 13. Figure 6 is a sectional view of the rail 13 shown in perspective view in Figure 5. Figure 9 is a sectional view of the rail 13 and the carriage 14 mutually coupled.

The carriages 14 and the rails 13 advantageously have coupling means 26 adapted to prevent lateral tipping and lifting of each carriage 14 relative to its respective rail 13.

In particular, each rail 13 includes a first profiled element 27 which is substantially U-shaped in section, to which the coupling posts 22 are fixed, and the coupling means 26 include for each of them side walls 28 of the same first profiled element 27 which are folded inward at their ends, so as to form a pair of tipping preventing shoulders 29. Each carriage 14 comprises a second profiled element 30 having a substantially inverted U-shaped crosssection, arranged in the cavity of the first profiled element 27 and provided at its ends with wings 31 of such extension as to lie below the pair of tipping preventing shoulders 29.

The wheel 15 is coupled to the second profiled element 30 by means of a bolt 32 that acts as a pivot for rotation, occupying part of the cavity thereof and protruding for another part, so as to rest with the groove 24 on the guiding rod 25.

Each carriage 14 is provided with a pair of identical plate-like elements 33 proximate to its rear end, therefore the end furthest from the form work 12, which have holes in mutually opposite positions where the ends of second struts 34 are fixed, two according to different inclinations, which are fixed with the other ends to a pair of C-beams 35. In particular, there are two pairs of parallel C-beams 35, conveniently with connections between the beams of each pair, which are vertical and fixed to the form work 12, on the side facing the structure 10, therefore opposite the one toward which casting occurs.

For each pair, the beams 35 are fixed with their lower ends to the respective parallel plates 23 of the coupling portions of the respective carriages 14. Each pair of beams 35 is arranged on either side of a respective coupling portion. As shown in Figure 1 and Figure 3, in the configuration in which casting occurs, the translation of the carriage 14 with respect to the rail 13 is conveniently prevented by mutually coupling the two elements by bolting at the plate-like elements 33, which are, in that configuration, arranged between a pair of brackets 36 which extend upward from opposite sides of each rail 13 and to which they are locked.

In the removal configuration, the translation of the carriage 14 with respect to the rail 13 is prevented by mutually coupling the two elements by bolting at two secondary plates 42, which are present on each carriage 14 in a front position with respect to the elements 33 and in the vicinity of the parallel plates 23, with each respective pair of anchors 36.

The climbing bracket 10 also includes means 37 for anchoring the carriage 14 to the supporting assembly 11, which include, as shown in the enlarged-scale view of Figure 4: at least one anchor 38 which is integral with the supporting assembly 11, at least one rod 39, preferably made of steel, which is transverse to the carriage 14 and passes through the two parallel plates 23 of a carriage 14, at least one pair of threaded bars 40, preferably made of steel, which pass through the rod 39 in symmetrical positions with respect to the plates 23 to be screwed into adapted female thread elements with which the anchor 38 is provided (preferably threaded nuts pre-welded inside it). There are also butterfly nuts 41, which by being screwed onto the respective threaded bars 40 up to the rod 39 ensure that the entire assembly adapted for translation remains locked during casting.

In particular, there are two anchors 38, which have a substantially triangular cross-section to be associated by bolting to the two pairs of vertical beams 16 and to the respective two pairs of horizontal beams 17 of the supporting assembly 11, said anchors 38 being appropriately provided with extensions adapted to be inserted into the spaces of said beams for fixing with bolts.

Moreover, the two anchors 38 have a longitudinal extension, or otherwise have a length such that they allow anchoring with two threaded bars 40 on opposite sides and symmetrically with respect to the plates 23.

The parallel plates 23 and the rods 39 are also useful for transferring traction forces from the beams 35 to the anchors 38 and then from said anchors to the anchors for anchoring to the wall of the previous casting step.

A piston system can be provided to actuate the translation of the translating part, in which the piston is coupled to the carriage at one of its ends and to the rail at the other end.

The use of the climbing bracket according to the invention is as follows.

In the forward configuration shown in Figure 1 and Figure 3, for the concrete casting step, the anchoring means 37 and the bolting between the anchors 36 and the plate-like elements 33 prevent the translation of the carriages 14 and of the form work 12 along the rails 13.

In the formwork release step it is therefore necessary to remove these constraints on translation to move the form work 12 away from the wall provided in the preceding configuration.

It should be noted that the connection between the translating part of the climbing bracket and the fixed part allows a transmission of loads, from the panels to the wall of the previous casting step, such that the climbing bracket according to the invention can be used for both double- sided and single-sided castings.

In practice, it has been found that the invention achieves the intended aim and objects by providing a climbing bracket that is suitable for use in single-sided castings and at the same time translates for formwork release, more smoothly and quickly than climbing brackets known to date, while still ensuring stability to the system. Moreover, the climbing bracket can be easily locked in the respective formwork placement and release positions, and can be released just as easily.

The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the accompanying claims; all the details may furthermore be replaced with other technically equivalent elements.

In practice, the materials used, so long as they are compatible with the specific use, as well as the contingent shapes and dimensions, may be any according to the requirements and the state of the art.

The disclosures in Italian Patent Application No. 102021000025505, from which this application claims priority, are incorporated herein by reference. Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A climbing bracket for formwork for vertical castings, comprising an assembly (11) for support on a walkable surface and with which a vertical formwork (12) is associable, said supporting assembly (11) being vertically translatable during the various steps of the casting of the concrete, characterized in that a pair of rails (13) is fixed to said supporting assembly (11), is extended in a direction at right angles to the plane of said vertical formwork (12), and respective carriages (14) are coupled thereto which are provided with at least one respective wheel (15) with which they are adapted to slide on said rails (13).

2. The climbing bracket according to claim 1, characterized in that said carriages (14) are provided with a portion for coupling to said vertical formwork (12), with which they are adapted to slide on said rails (13).

3. The climbing bracket according to one or more of the preceding claims, characterized in that each said wheel (15) has a circular groove (24) at which it rests on a guiding rod (25) which is extended longitudinally along a respective said rail (13).

4. The climbing bracket according to one or more of the preceding claims, characterized in that said carriages (14) and said rails (13) are provided with coupling means (26) adapted to prevent the lateral tipping and the lifting of each said carriage (14) with respect to the respective said rail (13).

5. The climbing bracket according to one or more of the preceding claims, characterized in that each said rail (13) comprises a first profiled element (27) which has a substantially U-shaped cross-section and said coupling means (26) comprise, for each said rail (13), side walls (28) of said first profiled element (27) which are folded inward at their ends, so as to form a pair of tipping preventing shoulders (29), each said rail (13) comprising a second profiled element (30) having a substantially inverted U-shaped cross-section, which is arranged in the cavity of said first profiled element (27), and is provided at the ends with wings (31) the extension of which is such as to lie below said pair of tipping preventing shoulders (29).

6. The climbing bracket according to one or more of the preceding claims, characterized in that it comprises means (37) for anchoring said carriage (14) to said supporting assembly (11).

7. The climbing bracket according to one or more of the preceding claims, characterized in that said anchoring means (37) comprise: at least one anchor (38) which is integral with said supporting assembly (11), at least one rod (39) which is transverse to said carriage (14) and passes through said two parallel plates (23) of said carriage (14), a pair of threaded bars (40) which pass through said rod (39) in order to be screwed into adapted female thread elements with which said anchor (38) is provided.