Corner wall formwork system and associated process

Abstract

A formwork system (CS) for a corner wall comprising an internal corner device (AI) and an external corner device (AE) including a main corner element (2) having a first edge (21) and a second edge (22) that are orthogonal, the main corner element (2) being free of formwork surface, at least one first hand-portable formwork panel (B1) comprising a formwork surface (S) connected to the first edge (21) of the main corner element (2), and at least one second hand-portable formwork panel (B2) comprising a formwork surface (S) connected to the second edge (22) of the main corner element (2). Abstract figure: Figure 3

Description

Title of the invention: Formwork system for a corner wall and associated method. Technical field

[0001] The present invention relates to the field of formwork from hand-portable panels to form a corner wall.

[0002] A hand-portable panel is a formwork panel that can be moved manually by an operator, in particular, through an opening in a building (door, window, etc.). A hand-portable panel is distinct from a formwork panel, which is moved by crane. Typically, a hand-portable panel has a mass of less than 20 kg. A hand-portable panel, as is known, comprises a frame to which a formwork wall is attached. The frame includes a rectangular structure defining edges and a plurality of stiffeners connecting the edges of the frame to increase its rigidity. The formwork wall is positioned on one front face of the frame.

[0003] To form a concrete wall, it is known to assemble several hand-portable panels together to form a formwork belt into which a hardening material, in particular concrete in a pasty or liquid state, can be poured.

[0004] With reference to [Fig. 1], for forming a corner wall, particularly at 90°, a formwork system is known comprising an internal corner panel Al and an external corner panel A2, as well as a plurality of manually handled panels M of conventional format. The internal corner panel Al has formwork surfaces S for forming the internal surfaces of the corner wall, while the external corner panel A2 has formwork surfaces S for forming the external surfaces of the corner wall.

[0005] As illustrated in [Fig. 1], the inner corner panel A1 and the outer corner panel A2 are connected at their ends by spacers T to resist the formwork forces during the concrete drying process. Preferably, with reference to [Fig. 1], the spacers T are positioned at the interface between a corner panel A1, A2 and a hand-portable panel M, which allows the forces to be resisted in a conventional manner.

[0006] Such a formwork system is satisfactory when the corner wall has a standard EPI thickness. Indeed, it is sufficient to use an internal corner panel A1 and an external corner panel A2 of standard dimensions, each having two formwork surfaces S which are orthogonal as illustrated in [Fig. 1].

[0007] With reference to [Fig.2], when the corner wall has a greater thickness EPI', it is necessary to provide an external corner panel A2' of suitable shape to allow obtaining the desired thickness EPI'.

[0008] Ideally, operators should have a wide range of internal and external corner panels available to form a corner wall with varying thicknesses. However, this entails a significant logistical cost.

[0009] In practice, when the thickness is unconventional, construction site operators use rudimentary means, such as plywood panels, to create a corner wall. The plywood panels are drilled where necessary to allow the passage of spacers, and multiple clamps are used to ensure the formwork is watertight. As a result, forming a corner wall with an unconventional thickness is generally time-consuming and can result in a poor-quality finish.

[0010] The invention thus aims to eliminate at least some of these drawbacks. PRESENTATION OF THE INVENTION

[0011] The invention relates to a formwork system for a corner wall comprising an internal corner device and an external corner device configured to be connected together by spacers in order to resist the formwork forces, the internal corner device comprising two orthogonal formwork surfaces, the external corner device comprising: • A main corner element having a first edge and a second edge that are orthogonal, the main corner element being free of formwork surface, • At least one first manually transportable formwork panel comprising a formwork surface connected to the first edge of the main corner element, and • At least one second hand-portable formwork panel comprising a formwork surface connected to the second edge of the main corner element.

[0012] Thanks to the invention, the external corner device is modular and allows for the creation of different formwork surface widths by adapting the width of the first and second manually transportable formwork panels. Advantageously, a robust and rapid assembly can be achieved to form a corner wall with varying thicknesses. From a logistical point of view, such manually transportable corner panels, with their reduced width compared to a traditional manually transportable formwork panel, can be used to supplement lengths in numerous situations.

[0013] According to one aspect, the main corner element is in the form of an angle bracket.

[0014] An angle bracket has a simple structure with a small footprint, which is ideal for ensuring assembly at an outside corner of a corner wall when accessibility is limited.

[0015] According to one aspect, each edge of the main corner element comprises a plurality of connecting openings, preferably spaced at the same connection pitch. This allows for a robust, watertight, and universal assembly.

[0016] According to one aspect, each manually handled formwork panel of the external corner device comprises edges having a plurality of connecting openings, preferably spaced at the same connection pitch. This allows for a robust, watertight, and universal assembly.

[0017] According to one aspect, each manually transportable formwork panel of the external corner device has a width of less than 600 mm, preferably less than 450 mm. This allows for a variety of corner wall thicknesses.

[0018] According to one aspect, the formwork surfaces of the internal corner device each have a width between 150 mm and 250 mm. Such a width ensures a compromise for achieving a large number of corner wall thicknesses while allowing easy assembly to other manually handled haunches.

[0019] According to one aspect, the internal corner device comprises edges having a plurality of connecting openings, preferably spaced at the same connection pitch. This allows for a robust, watertight, and universal assembly

[0020] According to one aspect, the edges of the internal corner device are respectively parallel to the formwork surfaces of the internal corner device. This allows for a robust, watertight, and universal assembly

[0021] According to one aspect, each edge of the internal corner device is associated with a male and a female component to allow connection to a manually transportable formwork panel. This allows for quick and robust assembly with reduced accessibility.

[0022] Convention also relates to a method of formwork for a corner wall using a formwork system as described above, the formwork method comprising steps consisting of: • Assemble the main corner element, the first hand-portable formwork panel, and the second hand-portable formwork panel to form the external corner device. • Connect the internal corner device and the external corner device together with spacers to support the formwork forces, and • Inject a hardening material between the inner corner device and the outer corner device.

[0023] The invention will be better understood upon reading the following description, given by way of example, and referring to the following figures, given by way of non-limiting examples, in which identical references are given to similar objects.

[0024] Fig. 1 is a schematic top view representation of a formwork system according to the prior art for forming a corner wall of standard thickness.

[0025] Fig. 2 is a schematic top view representation of a formwork system according to the prior art for forming a thick corner wall.

[0026] The [Fig.3] is a schematic top view representation of a formwork system according to one embodiment of the invention.

[0027] Fig. 4 is a schematic representation of a range of elements to form the formwork system.

[0028] Fig. 5 is a schematic representation of a hand-portable formwork panel for forming the formwork system.

[0029] Fig. 6 is a schematic representation of an internal corner device in perspective from the outside with its formwork surfaces visible.

[0030] Fig. 7 is a schematic top view of the internal angle device.

[0031] Fig. 8 is a schematic representation of the internal corner device in perspective from the inside with its formwork surfaces not visible.

[0032] Fig. 9 is another schematic representation of the internal corner device in perspective with a visible formwork surface.

[0033] Fig. 10 is a schematic representation of the external angle device in perspective.

[0034] The [Fig. 11] is a schematic top view representation of the internal angle device.

[0035] The [Fig. 12] is a schematic top view representation of the formwork system for forming a 200mm corner wall.

[0036] The [Fig. 13] is a schematic top view representation of the formwork system for forming a 180mm corner wall.

[0037] The [Fig. 14] is a schematic top view representation of the formwork system for forming a corner wall with a first part having a thickness of 160mm and a second part having a thickness of 250mm.

[0038] It should be noted that the figures set out the invention in detail to implement the invention, said figures being of course able to serve to better define the invention where appropriate. DETAILED DESCRIPTION OF THE INVENTION

[0039] With reference to [Fig.3], the invention relates to a formwork system SC for a corner wall comprising an internal corner device AI and an external corner device AE configured to be connected together by spacers T in order to take up the formwork forces.

[0040] According to the invention, the internal corner device AI comprises two orthogonal formwork surfaces SI, S2. The formwork surfaces SI, S2 allow the internal surfaces of the corner wall to be formed.

[0041] With reference to [Fig. 3], the external corner device AE comprises a main corner element 2 having a first edge 21 and a second edge 22 which are orthogonal, the main corner element 2 being free of formwork surface. The external corner device AE comprises at least one first hand-portable formwork panel B1, comprising a formwork surface S, connected to the first edge 21 of the main corner element 2, and at least one second hand-portable formwork panel B2 comprising a formwork surface S, connected to the second edge 22 of the main corner element 2.

[0042] Thus, the main corner element 2 has only a connecting function, and the formwork surfaces S of the manually transportable hips Bl, B2 allow the external surfaces of the corner wall to be formed. The external corner device AE has a modular structure, as will be shown later.

[0043] The SC formwork system is preferably made of metallic material, in particular, aluminum.

[0044] The spacers T hold the internal corner device AI and the external corner device AE together to prevent them from spreading apart under the pressure of the hardening material. Preferably, the spacers T are positioned at the ends, hereafter referred to as the "lateral ends," of the internal corner device AI and the external corner device AE so that they can be fixed to an edge, as will be shown later. The spacers T extend perpendicularly to the formwork surfaces S. The formwork forces are thus optimally absorbed. Preferably, each spacer T is in the form of a plate.

[0045] The internal angle device AI is illustrated in figures 6 to 9 and is preferably in the form of a welded mechanical structure.

[0046] The internal corner device AI comprises a first formwork surface SI and a second formwork surface S2 perpendicular to the first formwork surface SL

[0047] The formwork surfaces SI, S2 preferably have the same width Ll, preferably between 100mm and 300mm, preferably equal to 200mm.

[0048] With reference to [Fig.7], the internal corner device AI comprises a first edge 11 parallel to the first formwork surface SI and a second edge 12 parallel to the second formwork surface S2.

[0049] Such edges 11, 12 allow the formwork system SC to be joined to other hand-portable hips M in order to form a formwork as illustrated in [Fig. 3]. As illustrated in Figures 6 to 8, reinforcing members 13 can be welded to the formwork surfaces SI, S2 and to the edges 11, 12 to reinforce the mechanical structure.

[0050] With reference to figures 8 and 9, each bank 11,12 has connecting openings 10 to allow an optimal, robust and watertight connection with other hand-portable hips M. The connecting openings 10 are spaced apart by the same connecting pitch P. In this example, the connecting pitch P is between 30mm and 70mm, preferably equal to 50mm.

[0051] Preferably, with reference to [Fig. 8], each side 11, 12 is associated with a male connecting member 7 and a female connecting member 8. The male connecting member 7 and the female connecting member 8 are fixed together. A male connecting member 7 on one side 11, 12 is positioned opposite a female connecting member 8 on the other side 11, 12, that is, at the same height as illustrated in [Fig. 8]. Thus, the assembly is independent of the orientation of the internal angle device AI.

[0052] Such a male connecting member 7 and such a female connecting member 8 are known from patent application FR2409412. The male connecting member 7 comprises at least one threaded portion adapted to cooperate by screwing with the female connecting member 8. The threaded portion forms the downstream end of the male connecting member 7. The male connecting member 7 thus moves between a retracted and an extended position. In the retracted position, the male connecting member 7 is advantageously protected against impacts. Its overall size is also reduced. The female connecting member 8 comprises at least one nut mounted in a cage integral with the edge. Thus, the female connecting member 8 cannot be lost. It goes without saying that the male connecting member 7 and the female connecting member 8 could have different shapes. The important thing is that they can cooperate in such a way as to achieve optimal tightening and thus allow a robust and watertight assembly.

[0053] With further reference to [Fig. 8], the male connecting member 7 and the female connecting member 8 are mounted opposite a connecting opening 10 of an edge 11, 12. Preferably, an edge 11, 12 comprises on its outer surface at least one notch 9 opposite the connecting opening 10 associated with a connecting member 7, 8. In other words, the edge 11, 12 has a reduced thickness opposite the connecting opening 10 in order to accommodate a spacer T to resist the formwork forces. It is thus not necessary to drill through the formwork surface. The spacer T can therefore be at least partially integrated into the edge 11, 12.

[0054] As previously stated, the external corner device AE is modular so as to form formwork surfaces of varying widths in order, on the one hand, to allow the desired thickness for the corner wall to be achieved and, on the other hand, to allow conventional mounting of the T spacers with the AI ​​internal angle device. Thus, the T spacers are positioned precisely and robustly, orthogonally to the formwork surfaces, to optimally take over the formwork forces.

[0055] With reference to Figures 10 and 11, the main corner element 2 has no formwork function and is in the form of an angle bracket defining a first edge 21 and a second edge 22, which are orthogonal. Each edge 21, 22 of the main corner element 2 comprises a plurality of connecting openings 20, preferably spaced at the same connection pitch P. The connection pitch P is preferably identical to that previously. Each edge 21, 22 has a shape analogous to those of the internal corner device AI.

[0056] With reference to [Fig. 5], each hand-portable formwork B1, B2 of the external corner device AE comprises side edges 31 having a plurality of connecting openings 30, preferably spaced at the same connection pitch P. The connection pitch P is preferably identical to the previous one. Each edge 31 has connecting openings 30 to allow an optimal, robust, and watertight connection with other hand-portable hips M, a main corner element 2, or an internal corner device AL. Such a hand-portable formwork B1, B2 is known from patent application FR2409412.

[0057] Preferably, each edge 31 forming a length is associated with a male connecting member 7 and a female connecting member 8 as illustrated in [Fig. 5]. The male connecting member 7 and the female connecting member 8 are captive. The male connecting member 7 and the female connecting member 8 are mounted opposite a connecting opening 30, in particular, at a notch 9. The connecting members 7 and 8 are of the same type as those of the internal angle device AI so as to allow universal compatibility.

[0058] A hand-portable formwork panel Bl, B2 of the external corner device AE has a structure similar to a traditional hand-portable formwork panel M but with a reduced width, preferably less than 600 mm, which is the width of a traditional hand-portable formwork panel M. In order to allow for a wide variety of corner wall thicknesses, several widths L of the hand-portable formwork panel Bl, B2 are offered to form the formwork system SC. In particular, a hand-portable formwork panel Bl, B2 can have a width of: 450 mm, 400 mm, 380 mm, 360 mm, 300 mm and 150 mm.

[0059] Advantageously, such a hand-portable formwork panel Bl, B2 can be used in a formwork system for a corner wall but also to form a formwork belt of the desired length in addition to traditional hand-portable hips M. Logistics are thus simplified and it is not necessary to store a large number of inside corner panels and outside corner panels as in the prior art.

[0060] An example of the implementation of a formwork method for a corner wall using an SC formwork system will now be presented.

[0061] The formwork process includes a step of assembling the main corner element 2, the first hand-portable formwork panel B1, and the second hand-portable formwork panel B2 to form the external corner device AE as illustrated in [Fig. 3]. The width of the first hand-portable formwork panel B1 and the width of the second hand-portable formwork panel B2 are chosen based on the width of the formwork surfaces SI, S2 of the internal corner device AI, but also on the desired thickness of the corner wall.

[0062] In this example, the internal corner device AI has two formwork surfaces SI, S2, each with a width of 200mm. It goes without saying that this could be different.

[0063] To form a corner wall having a single thickness of 200mm while ensuring that the lateral ends of the internal corner device AI and the external corner device AE are aligned for the mounting of the spacers T, it is necessary to take hand-portable hips Bl, B2 having widths of 400mm (400-200=200) as illustrated in [Fig. 12].

[0064] To form a corner wall with a single thickness of 180 mm while ensuring that the lateral ends of the internal corner device AI and the external corner device AE are aligned, it is necessary to use manually handled hips Bl', B2' having widths of 380 mm as illustrated in [Fig. 13] (380-200=180). The internal corner device AI and the main corner element 2 of the external corner device AE advantageously remain unchanged.

[0065] To form a corner wall having a first thickness of 160 mm (at one end) and a second thickness of 250 mm (at the other end), while ensuring that the lateral ends of the internal corner device AI and the external corner device AE are aligned, it is necessary to use a first manually handled formwork Bl” having a width of 450 mm (450-200=250) and a second manually handled formwork B2” having a width of 360 mm (360-200=160) as illustrated in [Fig. 14]. Numerous variations in thickness are possible thanks to the invention.

[0066] The assembly of the external corner device AE is conveniently achieved thanks to the male 7 and female 8 connecting members, which provide a robust and reliable connection. Added components can also be used to ensure the connection, in particular, to join the main corner element 2 (screws and nuts, in particular).

[0067] Preferably, the external corner device AE and the internal corner device AI are both extended by hand-portable hips M to form a formwork. The use of male connecting members 7 and female connecting members 8, as well as connecting openings having the same spacing P, allows for a universal connection. The integration of male connecting members 7 and female connecting members 8 into the internal corner device AI facilitates assembly when accessibility is reduced in the internal corner.

[0068] The formwork method includes a step of connecting the internal corner device AI and the external corner device AE by means of spacers T in order to transfer the formwork forces. Since the lateral ends of the internal corner device AI and the external corner device AE are aligned, the spacers T are conveniently positioned, particularly at the interface with another conventional hand-portable formwork panel M.

[0069] The formwork process includes a step of injecting a hardening material, in particular concrete, between the internal corner device AI and the external corner device AE. The spacers T extend perpendicularly to the formwork surfaces, which improves the transfer of forces.

[0070] Thanks to the invention, a corner wall can be formed conveniently and quickly by taking advantage of the modularity of the AE external corner device. The corner wall is thus produced with high quality, regardless of its thickness.

Claims

Demands

1. Formwork system (SC) for a corner wall comprising an internal corner device (AI) and an external corner device (AE) configured to be connected together by spacers (T) to resist formwork forces, the internal corner device (AI) comprising two orthogonal formwork surfaces (SI, S2), the external corner device (AE) comprising: • A main corner element (2) having a first edge (21) and a second edge (22) which are orthogonal, the main corner element (2) being free of formwork surface, • At least one first hand-carried formwork panel (B1) comprising a formwork surface (S) connected to the first edge (21) of the main corner element (2), and • At least one second hand-carried formwork panel (B2) comprising a formwork surface (S) connected to the second edge (22) of the main corner element (2).

2. Formwork system according to claim 1, wherein the main corner element (2) is in the form of an angle.

3. Formwork system according to any one of claims 1 to 2, wherein each edge (21, 22) of the main corner element (2) comprises a plurality of connecting openings (20), preferably spaced apart by the same connecting pitch (P).

4. Formwork system according to any one of claims 1 to 3, wherein each hand-portable formwork panel (Bl) of the external corner device (AE) comprises edges (31) having a plurality of connecting openings (30), preferably spaced apart by the same connecting pitch (P).

5. Formwork system according to any one of claims 1 to 4, wherein each hand-portable formwork panel (B1, B2) of the external corner device (AE) has a width of less than 600mm, preferably less than 450mm.

6. Formwork system according to any one of claims 1 to 5, wherein the formwork surfaces (SI, S2) of the internal corner device (AI) each have a width between 150mm and 250mm.

7. Formwork system according to any one of claims 1 to 6, wherein the internal corner device (AI) comprises edges (11, 12) comprising a plurality of connecting openings (10), preferably spaced apart by the same connecting pitch (P).

8. Formwork system according to claim 7, wherein the edges (11, 12) of the internal corner device (AI) are respectively parallel to the formwork surfaces (SI, S2) of the internal corner device (AI).

9. Formwork system according to any one of claims 7 to 8, wherein each edge (11, 12) of the internal corner device (AI) is associated with a male member (7) and a female member (8) to enable connection to a hand-portable hip (M).

10. A method for forming a corner wall using a formwork system (SC) according to any one of claims 1 to 9, the formwork method comprising steps consisting of: • Assembling the main corner element (2), the first hand-carried formwork panel (B1) and the second hand-carried formwork panel (B2) to form the external corner device (AE), • Connecting the internal corner device (AI) and the external corner device (AE) together by means of spacers (T) in order to take up the formwork forces, and • Injecting a hardening material between the internal corner device (AI) and the external corner device (AE).

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